./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/rewnifrev2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/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_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/rewnifrev2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a70897b8f9d01ade64d517ee2bf20dd64d1adb0a94ea95e1a8b2431f33b62533 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:26:59,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:26:59,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:26:59,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:26:59,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:26:59,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:26:59,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:26:59,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:26:59,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:26:59,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:26:59,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:26:59,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:26:59,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:26:59,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:26:59,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:26:59,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:26:59,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:26:59,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:26:59,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:26:59,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:26:59,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:26:59,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:26:59,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:26:59,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:26:59,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:26:59,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:26:59,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:26:59,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:26:59,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:26:59,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:26:59,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:26:59,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:26:59,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:26:59,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:26:59,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:26:59,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:26:59,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:26:59,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:26:59,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:26:59,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:26:59,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:26:59,477 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:26:59,503 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:26:59,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:26:59,504 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:26:59,504 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:26:59,505 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:26:59,505 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:26:59,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:26:59,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:26:59,506 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:26:59,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:26:59,507 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:26:59,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:26:59,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:26:59,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:26:59,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:26:59,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:26:59,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:26:59,508 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:26:59,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:26:59,508 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:26:59,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:26:59,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:26:59,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:26:59,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:26:59,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:26:59,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:26:59,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:26:59,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:26:59,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:26:59,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:26:59,511 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:26:59,511 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:26:59,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:26:59,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:26:59,511 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_6086f020-694b-4c4d-b52e-0fb508e381e6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a70897b8f9d01ade64d517ee2bf20dd64d1adb0a94ea95e1a8b2431f33b62533 [2021-12-06 17:26:59,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:26:59,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:26:59,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:26:59,727 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:26:59,728 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:26:59,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-tiling/rewnifrev2.c [2021-12-06 17:26:59,769 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/data/f0700cf8d/4e5453fc429046e595fbddba75623276/FLAG7691aea44 [2021-12-06 17:27:00,132 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:27:00,133 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/sv-benchmarks/c/array-tiling/rewnifrev2.c [2021-12-06 17:27:00,137 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/data/f0700cf8d/4e5453fc429046e595fbddba75623276/FLAG7691aea44 [2021-12-06 17:27:00,146 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/data/f0700cf8d/4e5453fc429046e595fbddba75623276 [2021-12-06 17:27:00,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:27:00,149 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:27:00,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:27:00,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:27:00,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:27:00,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:27:00" (1/1) ... [2021-12-06 17:27:00,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1149416f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:00, skipping insertion in model container [2021-12-06 17:27:00,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:27:00" (1/1) ... [2021-12-06 17:27:00,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:27:00,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:27:00,264 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_6086f020-694b-4c4d-b52e-0fb508e381e6/sv-benchmarks/c/array-tiling/rewnifrev2.c[401,414] [2021-12-06 17:27:00,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:27:00,280 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:27:00,289 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_6086f020-694b-4c4d-b52e-0fb508e381e6/sv-benchmarks/c/array-tiling/rewnifrev2.c[401,414] [2021-12-06 17:27:00,292 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:27:00,302 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:27:00,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:00 WrapperNode [2021-12-06 17:27:00,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:27:00,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:27:00,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:27:00,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:27:00,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:00" (1/1) ... [2021-12-06 17:27:00,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:00" (1/1) ... [2021-12-06 17:27:00,335 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2021-12-06 17:27:00,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:27:00,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:27:00,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:27:00,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:27:00,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:00" (1/1) ... [2021-12-06 17:27:00,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:00" (1/1) ... [2021-12-06 17:27:00,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:00" (1/1) ... [2021-12-06 17:27:00,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:00" (1/1) ... [2021-12-06 17:27:00,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:00" (1/1) ... [2021-12-06 17:27:00,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:00" (1/1) ... [2021-12-06 17:27:00,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:00" (1/1) ... [2021-12-06 17:27:00,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:27:00,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:27:00,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:27:00,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:27:00,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:00" (1/1) ... [2021-12-06 17:27:00,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:27:00,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:00,383 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:27:00,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:27:00,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:27:00,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:27:00,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 17:27:00,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 17:27:00,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:27:00,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:27:00,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 17:27:00,471 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:27:00,472 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:27:00,553 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:27:00,557 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:27:00,557 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 17:27:00,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:27:00 BoogieIcfgContainer [2021-12-06 17:27:00,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:27:00,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:27:00,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:27:00,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:27:00,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:27:00" (1/3) ... [2021-12-06 17:27:00,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2c7b69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:27:00, skipping insertion in model container [2021-12-06 17:27:00,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:00" (2/3) ... [2021-12-06 17:27:00,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2c7b69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:27:00, skipping insertion in model container [2021-12-06 17:27:00,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:27:00" (3/3) ... [2021-12-06 17:27:00,565 INFO L111 eAbstractionObserver]: Analyzing ICFG rewnifrev2.c [2021-12-06 17:27:00,569 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:27:00,569 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:27:00,604 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:27:00,609 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-12-06 17:27:00,610 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:27:00,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:00,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 17:27:00,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:00,625 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:00,625 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:00,629 INFO L85 PathProgramCache]: Analyzing trace with hash 126991449, now seen corresponding path program 1 times [2021-12-06 17:27:00,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:00,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527695592] [2021-12-06 17:27:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:00,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:00,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:00,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527695592] [2021-12-06 17:27:00,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527695592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:00,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:00,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:27:00,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482772843] [2021-12-06 17:27:00,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:00,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 17:27:00,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:00,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 17:27:00,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:27:00,767 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:00,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:00,777 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2021-12-06 17:27:00,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 17:27:00,779 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 17:27:00,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:00,784 INFO L225 Difference]: With dead ends: 27 [2021-12-06 17:27:00,785 INFO L226 Difference]: Without dead ends: 12 [2021-12-06 17:27:00,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:27:00,790 INFO L933 BasicCegarLoop]: 18 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, 18 SdHoareTripleChecker+Invalid, 0 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 [2021-12-06 17:27:00,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:27:00,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-06 17:27:00,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-06 17:27:00,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:00,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-12-06 17:27:00,814 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-12-06 17:27:00,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:00,814 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-12-06 17:27:00,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:00,815 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-12-06 17:27:00,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 17:27:00,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:00,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:00,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:27:00,816 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:00,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:00,816 INFO L85 PathProgramCache]: Analyzing trace with hash 121450323, now seen corresponding path program 1 times [2021-12-06 17:27:00,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:00,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521588147] [2021-12-06 17:27:00,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:00,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:00,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:00,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521588147] [2021-12-06 17:27:00,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521588147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:00,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:00,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:27:00,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61286472] [2021-12-06 17:27:00,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:00,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:27:00,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:00,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:27:00,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:00,859 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:00,878 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-12-06 17:27:00,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:27:00,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 17:27:00,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:00,879 INFO L225 Difference]: With dead ends: 20 [2021-12-06 17:27:00,879 INFO L226 Difference]: Without dead ends: 13 [2021-12-06 17:27:00,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:00,882 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:00,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:27:00,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-12-06 17:27:00,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-12-06 17:27:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-12-06 17:27:00,887 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2021-12-06 17:27:00,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:00,887 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-12-06 17:27:00,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:00,888 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-12-06 17:27:00,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 17:27:00,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:00,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:00,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:27:00,889 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:00,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:00,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1899941007, now seen corresponding path program 1 times [2021-12-06 17:27:00,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:00,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97323128] [2021-12-06 17:27:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:00,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:01,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:01,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97323128] [2021-12-06 17:27:01,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97323128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:01,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:01,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 17:27:01,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126752060] [2021-12-06 17:27:01,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:01,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:27:01,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:01,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:27:01,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:27:01,087 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:01,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:01,161 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-12-06 17:27:01,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:27:01,162 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 17:27:01,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:01,162 INFO L225 Difference]: With dead ends: 19 [2021-12-06 17:27:01,162 INFO L226 Difference]: Without dead ends: 17 [2021-12-06 17:27:01,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:27:01,164 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:01,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 17 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:27:01,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-06 17:27:01,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-12-06 17:27:01,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-12-06 17:27:01,168 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-12-06 17:27:01,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:01,168 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-12-06 17:27:01,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:01,169 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-12-06 17:27:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 17:27:01,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:01,169 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:01,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:27:01,170 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:01,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:01,170 INFO L85 PathProgramCache]: Analyzing trace with hash 604563239, now seen corresponding path program 1 times [2021-12-06 17:27:01,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:01,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282915385] [2021-12-06 17:27:01,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:01,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:01,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:01,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282915385] [2021-12-06 17:27:01,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282915385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:01,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056408420] [2021-12-06 17:27:01,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:01,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:01,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:01,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:27:01,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:27:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:01,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:27:01,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:01,393 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-12-06 17:27:01,394 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 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 17:27:01,638 INFO L354 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-12-06 17:27:01,639 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2021-12-06 17:27:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:01,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:01,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056408420] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:27:01,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:27:01,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2021-12-06 17:27:01,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796837766] [2021-12-06 17:27:01,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:01,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 17:27:01,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:01,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 17:27:01,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-12-06 17:27:01,819 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:02,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:02,072 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-12-06 17:27:02,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 17:27:02,073 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 17:27:02,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:02,074 INFO L225 Difference]: With dead ends: 24 [2021-12-06 17:27:02,074 INFO L226 Difference]: Without dead ends: 22 [2021-12-06 17:27:02,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2021-12-06 17:27:02,076 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:02,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 34 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 56 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2021-12-06 17:27:02,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-06 17:27:02,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2021-12-06 17:27:02,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:02,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-12-06 17:27:02,082 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2021-12-06 17:27:02,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:02,082 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-12-06 17:27:02,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-12-06 17:27:02,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 17:27:02,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:02,083 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:02,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:27:02,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:02,286 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:02,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:02,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1572614179, now seen corresponding path program 2 times [2021-12-06 17:27:02,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:02,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427608024] [2021-12-06 17:27:02,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:02,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:02,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:02,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427608024] [2021-12-06 17:27:02,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427608024] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:02,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102766805] [2021-12-06 17:27:02,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:27:02,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:02,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:02,376 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:27:02,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:27:02,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:27:02,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:27:02,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:27:02,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:02,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:02,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102766805] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:27:02,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:27:02,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-12-06 17:27:02,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149362987] [2021-12-06 17:27:02,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:02,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:27:02,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:02,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:27:02,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:27:02,502 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:02,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:02,552 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-12-06 17:27:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:27:02,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 17:27:02,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:02,553 INFO L225 Difference]: With dead ends: 38 [2021-12-06 17:27:02,553 INFO L226 Difference]: Without dead ends: 22 [2021-12-06 17:27:02,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:27:02,555 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:02,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 49 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:27:02,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-06 17:27:02,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-12-06 17:27:02,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:02,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-12-06 17:27:02,560 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2021-12-06 17:27:02,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:02,560 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-12-06 17:27:02,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:02,561 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-12-06 17:27:02,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 17:27:02,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:02,561 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:02,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:27:02,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:02,763 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:02,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:02,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1704999301, now seen corresponding path program 3 times [2021-12-06 17:27:02,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:02,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670742811] [2021-12-06 17:27:02,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:02,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:02,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:02,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670742811] [2021-12-06 17:27:02,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670742811] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:02,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560396143] [2021-12-06 17:27:02,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:27:02,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:02,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:02,908 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:27:02,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:27:02,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 17:27:02,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:27:02,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 17:27:02,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:02,969 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-12-06 17:27:02,969 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 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 17:27:03,035 INFO L354 Elim1Store]: treesize reduction 113, result has 26.6 percent of original size [2021-12-06 17:27:03,036 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 2 case distinctions, treesize of input 38 treesize of output 58 [2021-12-06 17:27:03,450 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 17:27:03,451 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 20 [2021-12-06 17:27:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:03,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:14,397 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 41 treesize of output 39 [2021-12-06 17:27:14,403 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 1966 treesize of output 1942 [2021-12-06 17:27:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:15,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560396143] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:27:15,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:27:15,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2021-12-06 17:27:15,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856515554] [2021-12-06 17:27:15,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:15,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 17:27:15,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:15,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 17:27:15,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=701, Unknown=7, NotChecked=0, Total=870 [2021-12-06 17:27:15,059 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:29,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:29,656 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-12-06 17:27:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 17:27:29,657 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 17:27:29,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:29,657 INFO L225 Difference]: With dead ends: 59 [2021-12-06 17:27:29,657 INFO L226 Difference]: Without dead ends: 29 [2021-12-06 17:27:29,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=438, Invalid=1997, Unknown=15, NotChecked=0, Total=2450 [2021-12-06 17:27:29,659 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:29,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 103 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 35 Invalid, 0 Unknown, 59 Unchecked, 0.0s Time] [2021-12-06 17:27:29,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-06 17:27:29,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-06 17:27:29,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:29,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-12-06 17:27:29,663 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 20 [2021-12-06 17:27:29,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:29,663 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-12-06 17:27:29,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:29,663 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-12-06 17:27:29,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 17:27:29,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:29,664 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:29,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 17:27:29,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 17:27:29,865 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:29,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:29,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1436116461, now seen corresponding path program 4 times [2021-12-06 17:27:29,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:29,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737838367] [2021-12-06 17:27:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:29,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:27:30,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:30,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737838367] [2021-12-06 17:27:30,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737838367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:30,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820694742] [2021-12-06 17:27:30,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:27:30,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:30,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:30,227 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:27:30,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:27:30,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:27:30,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:27:30,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 17:27:30,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:30,276 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-12-06 17:27:30,276 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 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 17:27:30,309 INFO L354 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-06 17:27:30,309 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 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-06 17:27:30,340 INFO L354 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-06 17:27:30,341 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 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-06 17:27:30,634 INFO L354 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-12-06 17:27:30,634 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2021-12-06 17:27:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:27:30,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:27:30,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820694742] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:27:30,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:27:30,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2021-12-06 17:27:30,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114891457] [2021-12-06 17:27:30,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:30,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 17:27:30,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:30,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 17:27:30,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-12-06 17:27:30,913 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:31,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:31,224 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-12-06 17:27:31,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 17:27:31,225 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-06 17:27:31,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:31,225 INFO L225 Difference]: With dead ends: 38 [2021-12-06 17:27:31,225 INFO L226 Difference]: Without dead ends: 36 [2021-12-06 17:27:31,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 17:27:31,227 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 121 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:31,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 75 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 118 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2021-12-06 17:27:31,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-06 17:27:31,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-12-06 17:27:31,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:31,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-12-06 17:27:31,231 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2021-12-06 17:27:31,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:31,231 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-12-06 17:27:31,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:31,232 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-12-06 17:27:31,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 17:27:31,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:31,232 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:31,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 17:27:31,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:31,434 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:31,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:31,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2041873501, now seen corresponding path program 5 times [2021-12-06 17:27:31,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:31,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396349959] [2021-12-06 17:27:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:31,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:31,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:31,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396349959] [2021-12-06 17:27:31,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396349959] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:31,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112770584] [2021-12-06 17:27:31,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:27:31,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:31,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:31,629 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:27:31,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:27:31,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 17:27:31,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:27:31,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 17:27:31,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:31,715 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-12-06 17:27:31,716 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 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 17:27:31,739 INFO L354 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-06 17:27:31,739 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 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-06 17:27:31,760 INFO L354 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-06 17:27:31,760 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 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-06 17:27:31,783 INFO L354 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-06 17:27:31,784 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 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-06 17:27:31,939 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 7 [2021-12-06 17:27:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:31,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:32,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112770584] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:27:32,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:27:32,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 26 [2021-12-06 17:27:32,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66560335] [2021-12-06 17:27:32,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:32,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 17:27:32,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:32,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 17:27:32,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-12-06 17:27:32,209 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:32,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:32,537 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-12-06 17:27:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 17:27:32,537 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-06 17:27:32,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:32,538 INFO L225 Difference]: With dead ends: 42 [2021-12-06 17:27:32,538 INFO L226 Difference]: Without dead ends: 40 [2021-12-06 17:27:32,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=338, Invalid=1302, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 17:27:32,540 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:32,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 105 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 153 Invalid, 0 Unknown, 85 Unchecked, 0.1s Time] [2021-12-06 17:27:32,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-06 17:27:32,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-12-06 17:27:32,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:32,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-12-06 17:27:32,546 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2021-12-06 17:27:32,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:32,546 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-12-06 17:27:32,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:32,547 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-12-06 17:27:32,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 17:27:32,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:32,548 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:32,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:27:32,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 17:27:32,750 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:32,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:32,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1072678489, now seen corresponding path program 6 times [2021-12-06 17:27:32,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:32,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426120218] [2021-12-06 17:27:32,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:32,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:32,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:32,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426120218] [2021-12-06 17:27:32,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426120218] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:32,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305715127] [2021-12-06 17:27:32,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:27:32,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:32,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:32,915 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:27:32,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:27:32,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 17:27:32,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:27:32,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 17:27:32,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:33,090 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:33,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:33,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305715127] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:27:33,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:27:33,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 22 [2021-12-06 17:27:33,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620824135] [2021-12-06 17:27:33,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:33,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 17:27:33,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:33,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 17:27:33,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=273, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:27:33,169 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:33,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:33,242 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-12-06 17:27:33,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 17:27:33,242 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-06 17:27:33,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:33,242 INFO L225 Difference]: With dead ends: 68 [2021-12-06 17:27:33,242 INFO L226 Difference]: Without dead ends: 40 [2021-12-06 17:27:33,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=205, Invalid=301, Unknown=0, NotChecked=0, Total=506 [2021-12-06 17:27:33,243 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:33,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 110 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:27:33,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-06 17:27:33,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-12-06 17:27:33,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:33,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-12-06 17:27:33,248 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2021-12-06 17:27:33,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:33,248 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-12-06 17:27:33,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:33,248 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-12-06 17:27:33,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 17:27:33,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:33,249 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:33,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 17:27:33,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:33,450 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:33,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:33,450 INFO L85 PathProgramCache]: Analyzing trace with hash 811766135, now seen corresponding path program 7 times [2021-12-06 17:27:33,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:33,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117066905] [2021-12-06 17:27:33,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:33,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:33,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:33,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117066905] [2021-12-06 17:27:33,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117066905] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:33,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477460666] [2021-12-06 17:27:33,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:27:33,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:33,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:33,737 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:27:33,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:27:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:33,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 17:27:33,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:33,788 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-12-06 17:27:33,788 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 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 17:27:33,820 INFO L354 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-06 17:27:33,820 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 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-06 17:27:33,844 INFO L354 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-06 17:27:33,845 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 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-06 17:27:33,873 INFO L354 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-06 17:27:33,873 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 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-06 17:27:33,902 INFO L354 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-06 17:27:33,902 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 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-06 17:27:34,242 INFO L354 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-12-06 17:27:34,242 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2021-12-06 17:27:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:34,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:34,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477460666] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:27:34,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:27:34,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 42 [2021-12-06 17:27:34,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6777817] [2021-12-06 17:27:34,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:34,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 17:27:34,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:34,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 17:27:34,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1472, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 17:27:34,643 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 42 states, 42 states have (on average 2.5238095238095237) internal successors, (106), 42 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:38,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:38,500 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-12-06 17:27:38,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 17:27:38,500 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.5238095238095237) internal successors, (106), 42 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-06 17:27:38,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:38,500 INFO L225 Difference]: With dead ends: 48 [2021-12-06 17:27:38,501 INFO L226 Difference]: Without dead ends: 46 [2021-12-06 17:27:38,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 52 SyntacticMatches, 10 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=739, Invalid=3421, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 17:27:38,502 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 103 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:38,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 199 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 205 Invalid, 0 Unknown, 122 Unchecked, 0.1s Time] [2021-12-06 17:27:38,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-06 17:27:38,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-12-06 17:27:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-12-06 17:27:38,507 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2021-12-06 17:27:38,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:38,513 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-12-06 17:27:38,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.5238095238095237) internal successors, (106), 42 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:38,513 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-12-06 17:27:38,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 17:27:38,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:38,514 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:38,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 17:27:38,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 17:27:38,715 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:38,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:38,717 INFO L85 PathProgramCache]: Analyzing trace with hash 975163949, now seen corresponding path program 8 times [2021-12-06 17:27:38,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:38,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909324945] [2021-12-06 17:27:38,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:38,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 51 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:38,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:38,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909324945] [2021-12-06 17:27:38,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909324945] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:38,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874630321] [2021-12-06 17:27:38,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:27:38,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:38,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:38,799 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:27:38,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 17:27:38,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:27:38,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:27:38,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 17:27:38,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 72 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:38,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 72 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:39,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874630321] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:27:39,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:27:39,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 25 [2021-12-06 17:27:39,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602388859] [2021-12-06 17:27:39,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:39,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 17:27:39,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:39,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 17:27:39,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=356, Unknown=0, NotChecked=0, Total=600 [2021-12-06 17:27:39,083 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:39,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:39,164 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2021-12-06 17:27:39,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 17:27:39,164 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-06 17:27:39,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:39,165 INFO L225 Difference]: With dead ends: 78 [2021-12-06 17:27:39,165 INFO L226 Difference]: Without dead ends: 46 [2021-12-06 17:27:39,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2021-12-06 17:27:39,166 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:39,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 104 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:27:39,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-06 17:27:39,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-12-06 17:27:39,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:39,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-12-06 17:27:39,171 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2021-12-06 17:27:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:39,171 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-12-06 17:27:39,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-12-06 17:27:39,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 17:27:39,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:39,172 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:39,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 17:27:39,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 17:27:39,374 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:39,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:39,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1359564491, now seen corresponding path program 9 times [2021-12-06 17:27:39,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:39,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939272068] [2021-12-06 17:27:39,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:39,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 6 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:39,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:39,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939272068] [2021-12-06 17:27:39,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939272068] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:39,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750030173] [2021-12-06 17:27:39,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:27:39,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:39,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:39,639 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:27:39,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6086f020-694b-4c4d-b52e-0fb508e381e6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 17:27:39,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 17:27:39,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:27:39,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 17:27:39,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:39,745 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-12-06 17:27:39,745 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 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 17:27:39,790 INFO L354 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-06 17:27:39,790 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 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-06 17:27:39,821 INFO L354 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-06 17:27:39,821 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 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-06 17:27:39,853 INFO L354 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-06 17:27:39,853 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 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-06 17:27:39,886 INFO L354 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-06 17:27:39,887 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 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-06 17:27:39,922 INFO L354 Elim1Store]: treesize reduction 130, result has 15.6 percent of original size [2021-12-06 17:27:39,922 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 2 case distinctions, treesize of input 38 treesize of output 41 [2021-12-06 17:27:40,567 INFO L354 Elim1Store]: treesize reduction 50, result has 5.7 percent of original size [2021-12-06 17:27:40,568 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 17 [2021-12-06 17:27:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 66 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:40,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:29:24,931 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 108 treesize of output 106 [2021-12-06 17:29:26,329 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 38484785627094 treesize of output 38482906578902