./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_6.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_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/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_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/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_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/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 e0e55420715ff80c27c9ff14eb8ac6a520210206e33b4fd081fea4bf1c2e05be --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:14:22,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:14:22,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:14:22,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:14:22,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:14:22,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:14:22,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:14:22,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:14:22,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:14:22,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:14:22,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:14:22,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:14:22,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:14:22,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:14:22,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:14:22,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:14:22,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:14:22,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:14:22,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:14:22,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:14:22,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:14:22,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:14:22,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:14:22,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:14:22,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:14:22,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:14:22,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:14:22,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:14:22,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:14:22,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:14:22,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:14:22,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:14:22,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:14:22,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:14:22,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:14:22,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:14:22,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:14:22,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:14:22,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:14:22,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:14:22,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:14:22,473 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:14:22,491 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:14:22,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:14:22,492 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:14:22,492 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:14:22,493 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:14:22,493 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:14:22,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:14:22,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:14:22,494 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:14:22,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:14:22,494 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:14:22,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:14:22,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:14:22,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:14:22,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:14:22,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:14:22,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:14:22,495 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:14:22,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:14:22,495 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:14:22,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:14:22,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:14:22,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:14:22,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:14:22,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:14:22,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:14:22,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:14:22,496 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:14:22,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:14:22,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:14:22,496 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:14:22,497 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:14:22,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:14:22,497 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:14:22,497 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_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e55420715ff80c27c9ff14eb8ac6a520210206e33b4fd081fea4bf1c2e05be [2021-12-07 00:14:22,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:14:22,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:14:22,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:14:22,706 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:14:22,707 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:14:22,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/loop-simple/nested_6.c [2021-12-07 00:14:22,756 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/data/853695af7/9656a2f163bb4531a73121ffeef7a023/FLAG6f7e392a3 [2021-12-07 00:14:23,122 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:14:23,122 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/sv-benchmarks/c/loop-simple/nested_6.c [2021-12-07 00:14:23,127 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/data/853695af7/9656a2f163bb4531a73121ffeef7a023/FLAG6f7e392a3 [2021-12-07 00:14:23,135 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/data/853695af7/9656a2f163bb4531a73121ffeef7a023 [2021-12-07 00:14:23,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:14:23,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:14:23,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:14:23,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:14:23,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:14:23,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:14:23" (1/1) ... [2021-12-07 00:14:23,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7686e2c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:23, skipping insertion in model container [2021-12-07 00:14:23,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:14:23" (1/1) ... [2021-12-07 00:14:23,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:14:23,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:14:23,275 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_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/sv-benchmarks/c/loop-simple/nested_6.c[959,972] [2021-12-07 00:14:23,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:14:23,284 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:14:23,296 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_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/sv-benchmarks/c/loop-simple/nested_6.c[959,972] [2021-12-07 00:14:23,296 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:14:23,306 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:14:23,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:23 WrapperNode [2021-12-07 00:14:23,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:14:23,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:14:23,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:14:23,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:14:23,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:23" (1/1) ... [2021-12-07 00:14:23,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:23" (1/1) ... [2021-12-07 00:14:23,331 INFO L137 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 68 [2021-12-07 00:14:23,331 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:14:23,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:14:23,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:14:23,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:14:23,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:23" (1/1) ... [2021-12-07 00:14:23,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:23" (1/1) ... [2021-12-07 00:14:23,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:23" (1/1) ... [2021-12-07 00:14:23,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:23" (1/1) ... [2021-12-07 00:14:23,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:23" (1/1) ... [2021-12-07 00:14:23,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:23" (1/1) ... [2021-12-07 00:14:23,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:23" (1/1) ... [2021-12-07 00:14:23,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:14:23,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:14:23,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:14:23,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:14:23,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:23" (1/1) ... [2021-12-07 00:14:23,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:14:23,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:23,375 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:14:23,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:14:23,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:14:23,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:14:23,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:14:23,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:14:23,466 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:14:23,467 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:14:23,546 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:14:23,551 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:14:23,551 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-07 00:14:23,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:14:23 BoogieIcfgContainer [2021-12-07 00:14:23,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:14:23,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:14:23,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:14:23,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:14:23,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:14:23" (1/3) ... [2021-12-07 00:14:23,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@538683ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:14:23, skipping insertion in model container [2021-12-07 00:14:23,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:23" (2/3) ... [2021-12-07 00:14:23,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@538683ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:14:23, skipping insertion in model container [2021-12-07 00:14:23,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:14:23" (3/3) ... [2021-12-07 00:14:23,560 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_6.c [2021-12-07 00:14:23,564 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:14:23,564 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:14:23,601 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:14:23,607 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 [2021-12-07 00:14:23,607 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:14:23,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 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) [2021-12-07 00:14:23,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-07 00:14:23,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:23,624 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-07 00:14:23,625 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:23,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:23,629 INFO L85 PathProgramCache]: Analyzing trace with hash 28698918, now seen corresponding path program 1 times [2021-12-07 00:14:23,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:23,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965810945] [2021-12-07 00:14:23,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:23,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:14:23,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:23,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965810945] [2021-12-07 00:14:23,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965810945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:23,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:23,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:14:23,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908431340] [2021-12-07 00:14:23,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:23,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:14:23,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:23,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:14:23,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:14:23,783 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:23,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:23,807 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2021-12-07 00:14:23,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:14:23,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-07 00:14:23,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:23,816 INFO L225 Difference]: With dead ends: 52 [2021-12-07 00:14:23,816 INFO L226 Difference]: Without dead ends: 29 [2021-12-07 00:14:23,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:14:23,821 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:23,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:23,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-07 00:14:23,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2021-12-07 00:14:23,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:23,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2021-12-07 00:14:23,853 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 5 [2021-12-07 00:14:23,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:23,853 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2021-12-07 00:14:23,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:23,853 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2021-12-07 00:14:23,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-07 00:14:23,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:23,854 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:23,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:14:23,854 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:23,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:23,855 INFO L85 PathProgramCache]: Analyzing trace with hash 270775882, now seen corresponding path program 1 times [2021-12-07 00:14:23,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:23,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488437627] [2021-12-07 00:14:23,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:23,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:14:23,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:23,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488437627] [2021-12-07 00:14:23,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488437627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:23,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:23,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:14:23,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436138441] [2021-12-07 00:14:23,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:23,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:14:23,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:23,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:14:23,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:14:23,889 INFO L87 Difference]: Start difference. First operand 18 states and 23 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) [2021-12-07 00:14:23,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:23,902 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2021-12-07 00:14:23,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:14:23,903 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 [2021-12-07 00:14:23,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:23,903 INFO L225 Difference]: With dead ends: 43 [2021-12-07 00:14:23,903 INFO L226 Difference]: Without dead ends: 28 [2021-12-07 00:14:23,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:14:23,905 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:23,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:23,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-07 00:14:23,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-12-07 00:14:23,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:23,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-12-07 00:14:23,910 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 8 [2021-12-07 00:14:23,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:23,910 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-12-07 00:14:23,910 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) [2021-12-07 00:14:23,910 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-12-07 00:14:23,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 00:14:23,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:23,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:23,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:14:23,911 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:23,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:23,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1936160826, now seen corresponding path program 1 times [2021-12-07 00:14:23,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:23,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456125746] [2021-12-07 00:14:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:23,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:14:23,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:23,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456125746] [2021-12-07 00:14:23,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456125746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:23,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:23,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:14:23,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060899843] [2021-12-07 00:14:23,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:23,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:14:23,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:23,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:14:23,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:14:23,946 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:23,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:23,958 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2021-12-07 00:14:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:14:23,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-07 00:14:23,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:23,959 INFO L225 Difference]: With dead ends: 43 [2021-12-07 00:14:23,959 INFO L226 Difference]: Without dead ends: 27 [2021-12-07 00:14:23,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:14:23,960 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:23,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:23,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-07 00:14:23,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2021-12-07 00:14:23,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:23,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-12-07 00:14:23,965 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2021-12-07 00:14:23,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:23,965 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-12-07 00:14:23,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:23,965 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-12-07 00:14:23,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-07 00:14:23,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:23,966 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:23,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 00:14:23,966 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:23,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:23,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1227454858, now seen corresponding path program 1 times [2021-12-07 00:14:23,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:23,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396115080] [2021-12-07 00:14:23,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:23,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:14:23,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:23,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396115080] [2021-12-07 00:14:23,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396115080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:23,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:23,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:14:23,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475634463] [2021-12-07 00:14:23,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:23,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:14:23,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:23,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:14:23,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:14:23,999 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-12-07 00:14:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:24,010 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2021-12-07 00:14:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:14:24,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) Word has length 14 [2021-12-07 00:14:24,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:24,011 INFO L225 Difference]: With dead ends: 43 [2021-12-07 00:14:24,011 INFO L226 Difference]: Without dead ends: 26 [2021-12-07 00:14:24,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:14:24,013 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:24,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:24,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-07 00:14:24,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-12-07 00:14:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-12-07 00:14:24,017 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 14 [2021-12-07 00:14:24,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:24,017 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-12-07 00:14:24,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-12-07 00:14:24,017 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-12-07 00:14:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-07 00:14:24,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:24,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:24,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 00:14:24,018 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:24,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:24,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1691120258, now seen corresponding path program 1 times [2021-12-07 00:14:24,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:24,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858996945] [2021-12-07 00:14:24,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:24,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:14:24,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:24,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858996945] [2021-12-07 00:14:24,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858996945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:24,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:24,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:14:24,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305503901] [2021-12-07 00:14:24,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:24,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:14:24,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:24,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:14:24,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:14:24,051 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:24,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:24,061 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2021-12-07 00:14:24,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:14:24,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-07 00:14:24,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:24,062 INFO L225 Difference]: With dead ends: 43 [2021-12-07 00:14:24,062 INFO L226 Difference]: Without dead ends: 25 [2021-12-07 00:14:24,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:14:24,063 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:24,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:24,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-07 00:14:24,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-12-07 00:14:24,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:24,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-12-07 00:14:24,067 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 17 [2021-12-07 00:14:24,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:24,068 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-12-07 00:14:24,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:24,068 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-12-07 00:14:24,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-07 00:14:24,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:24,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:24,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 00:14:24,069 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:24,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:24,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1077656366, now seen corresponding path program 1 times [2021-12-07 00:14:24,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:24,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027228569] [2021-12-07 00:14:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:24,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:14:24,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:24,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027228569] [2021-12-07 00:14:24,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027228569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:24,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:24,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:14:24,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264461299] [2021-12-07 00:14:24,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:24,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:14:24,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:24,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:14:24,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:14:24,103 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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) [2021-12-07 00:14:24,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:24,114 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-12-07 00:14:24,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:14:24,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-07 00:14:24,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:24,116 INFO L225 Difference]: With dead ends: 43 [2021-12-07 00:14:24,116 INFO L226 Difference]: Without dead ends: 24 [2021-12-07 00:14:24,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:14:24,118 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:24,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-07 00:14:24,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-12-07 00:14:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-12-07 00:14:24,123 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 20 [2021-12-07 00:14:24,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:24,124 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-12-07 00:14:24,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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) [2021-12-07 00:14:24,124 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-12-07 00:14:24,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-07 00:14:24,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:24,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:24,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-07 00:14:24,126 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:24,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:24,127 INFO L85 PathProgramCache]: Analyzing trace with hash -624839792, now seen corresponding path program 1 times [2021-12-07 00:14:24,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:24,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943576528] [2021-12-07 00:14:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:24,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:14:24,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:24,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943576528] [2021-12-07 00:14:24,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943576528] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:14:24,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712983390] [2021-12-07 00:14:24,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:24,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:24,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:24,167 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:24,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:14:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:24,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:14:24,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:14:24,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:14:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:14:24,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712983390] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:14:24,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:14:24,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-07 00:14:24,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469602772] [2021-12-07 00:14:24,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:14:24,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:14:24,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:24,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:14:24,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:14:24,306 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:24,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:24,332 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-12-07 00:14:24,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:14:24,332 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 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 22 [2021-12-07 00:14:24,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:24,333 INFO L225 Difference]: With dead ends: 49 [2021-12-07 00:14:24,333 INFO L226 Difference]: Without dead ends: 29 [2021-12-07 00:14:24,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:14:24,335 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:24,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 84 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:24,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-07 00:14:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-07 00:14:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 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) [2021-12-07 00:14:24,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-12-07 00:14:24,340 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 22 [2021-12-07 00:14:24,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:24,341 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-12-07 00:14:24,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:24,341 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-12-07 00:14:24,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-07 00:14:24,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:24,342 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:24,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:14:24,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:24,545 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:24,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:24,546 INFO L85 PathProgramCache]: Analyzing trace with hash -222481718, now seen corresponding path program 2 times [2021-12-07 00:14:24,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:24,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460372493] [2021-12-07 00:14:24,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:24,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-07 00:14:24,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:24,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460372493] [2021-12-07 00:14:24,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460372493] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:14:24,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788817934] [2021-12-07 00:14:24,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:14:24,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:24,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:24,698 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:24,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:14:24,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:14:24,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:14:24,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:14:24,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:14:24,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:14:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:14:24,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788817934] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:14:24,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:14:24,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2021-12-07 00:14:24,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163671167] [2021-12-07 00:14:24,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:14:24,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:14:24,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:24,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:14:24,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:14:24,874 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:24,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:24,969 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2021-12-07 00:14:24,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 00:14:24,970 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-07 00:14:24,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:24,970 INFO L225 Difference]: With dead ends: 88 [2021-12-07 00:14:24,970 INFO L226 Difference]: Without dead ends: 62 [2021-12-07 00:14:24,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-12-07 00:14:24,972 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:24,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 91 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-07 00:14:24,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2021-12-07 00:14:24,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-12-07 00:14:24,977 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 28 [2021-12-07 00:14:24,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:24,978 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-12-07 00:14:24,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:24,978 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-12-07 00:14:24,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-07 00:14:24,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:24,979 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:24,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:14:25,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:25,181 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:25,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:25,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1455035518, now seen corresponding path program 3 times [2021-12-07 00:14:25,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:25,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363325565] [2021-12-07 00:14:25,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:25,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-07 00:14:25,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:25,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363325565] [2021-12-07 00:14:25,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363325565] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:14:25,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377962876] [2021-12-07 00:14:25,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:14:25,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:25,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:25,296 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:25,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:14:25,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-07 00:14:25,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:14:25,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:14:25,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-07 00:14:25,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:14:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-07 00:14:25,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377962876] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:14:25,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:14:25,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-07 00:14:25,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267814210] [2021-12-07 00:14:25,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:14:25,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:14:25,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:25,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:14:25,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:14:25,450 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:25,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:25,523 INFO L93 Difference]: Finished difference Result 479 states and 540 transitions. [2021-12-07 00:14:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 00:14:25,523 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 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 47 [2021-12-07 00:14:25,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:25,526 INFO L225 Difference]: With dead ends: 479 [2021-12-07 00:14:25,526 INFO L226 Difference]: Without dead ends: 434 [2021-12-07 00:14:25,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-12-07 00:14:25,527 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 176 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:25,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 81 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-12-07 00:14:25,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 306. [2021-12-07 00:14:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1213114754098361) internal successors, (342), 305 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:25,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 342 transitions. [2021-12-07 00:14:25,555 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 342 transitions. Word has length 47 [2021-12-07 00:14:25,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:25,555 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 342 transitions. [2021-12-07 00:14:25,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:25,555 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 342 transitions. [2021-12-07 00:14:25,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-12-07 00:14:25,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:25,560 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-12-07 00:14:25,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:14:25,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-07 00:14:25,761 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:25,762 INFO L85 PathProgramCache]: Analyzing trace with hash -107592410, now seen corresponding path program 4 times [2021-12-07 00:14:25,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:25,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62520188] [2021-12-07 00:14:25,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:25,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11350 backedges. 4301 proven. 1 refuted. 0 times theorem prover too weak. 7048 trivial. 0 not checked. [2021-12-07 00:14:25,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:25,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62520188] [2021-12-07 00:14:25,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62520188] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:14:25,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335595259] [2021-12-07 00:14:25,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:14:25,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:25,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:25,911 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:25,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:14:25,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:14:25,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:14:25,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:14:26,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11350 backedges. 2500 proven. 89 refuted. 0 times theorem prover too weak. 8761 trivial. 0 not checked. [2021-12-07 00:14:26,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:14:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11350 backedges. 2500 proven. 89 refuted. 0 times theorem prover too weak. 8761 trivial. 0 not checked. [2021-12-07 00:14:26,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335595259] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:14:26,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:14:26,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2021-12-07 00:14:26,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265239414] [2021-12-07 00:14:26,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:14:26,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:14:26,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:26,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:14:26,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:14:26,491 INFO L87 Difference]: Start difference. First operand 306 states and 342 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:26,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:26,701 INFO L93 Difference]: Finished difference Result 2596 states and 2920 transitions. [2021-12-07 00:14:26,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 00:14:26,701 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 305 [2021-12-07 00:14:26,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:26,711 INFO L225 Difference]: With dead ends: 2596 [2021-12-07 00:14:26,711 INFO L226 Difference]: Without dead ends: 2294 [2021-12-07 00:14:26,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-12-07 00:14:26,715 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 168 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:26,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 87 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:26,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-12-07 00:14:26,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1542. [2021-12-07 00:14:26,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 1.0837118754055808) internal successors, (1670), 1541 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:26,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 1670 transitions. [2021-12-07 00:14:26,801 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 1670 transitions. Word has length 305 [2021-12-07 00:14:26,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:26,802 INFO L470 AbstractCegarLoop]: Abstraction has 1542 states and 1670 transitions. [2021-12-07 00:14:26,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:26,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 1670 transitions. [2021-12-07 00:14:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1542 [2021-12-07 00:14:26,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:26,866 INFO L514 BasicCegarLoop]: trace histogram [576, 576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-12-07 00:14:26,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-07 00:14:27,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 00:14:27,068 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:27,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1672164490, now seen corresponding path program 5 times [2021-12-07 00:14:27,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:27,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31028889] [2021-12-07 00:14:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:27,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 402372 backedges. 151174 proven. 1 refuted. 0 times theorem prover too weak. 251197 trivial. 0 not checked. [2021-12-07 00:14:28,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:28,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31028889] [2021-12-07 00:14:28,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31028889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:14:28,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473874658] [2021-12-07 00:14:28,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:14:28,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:28,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:28,151 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:28,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:14:28,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 69 check-sat command(s) [2021-12-07 00:14:28,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:14:28,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:14:28,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 402372 backedges. 214152 proven. 3149 refuted. 0 times theorem prover too weak. 185071 trivial. 0 not checked. [2021-12-07 00:14:29,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:14:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 402372 backedges. 214152 proven. 3149 refuted. 0 times theorem prover too weak. 185071 trivial. 0 not checked. [2021-12-07 00:14:30,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473874658] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:14:30,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:14:30,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2021-12-07 00:14:30,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166042896] [2021-12-07 00:14:30,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:14:30,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:14:30,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:30,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:14:30,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:14:30,563 INFO L87 Difference]: Start difference. First operand 1542 states and 1670 transitions. Second operand has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:31,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:31,077 INFO L93 Difference]: Finished difference Result 15052 states and 16328 transitions. [2021-12-07 00:14:31,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 00:14:31,078 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 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 1541 [2021-12-07 00:14:31,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:31,127 INFO L225 Difference]: With dead ends: 15052 [2021-12-07 00:14:31,127 INFO L226 Difference]: Without dead ends: 13514 [2021-12-07 00:14:31,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3096 GetRequests, 3076 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-12-07 00:14:31,132 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 222 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:31,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 104 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:31,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13514 states. [2021-12-07 00:14:31,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13514 to 9018. [2021-12-07 00:14:31,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9018 states, 9017 states have (on average 1.0777420428080293) internal successors, (9718), 9017 states have internal predecessors, (9718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9018 states to 9018 states and 9718 transitions. [2021-12-07 00:14:31,542 INFO L78 Accepts]: Start accepts. Automaton has 9018 states and 9718 transitions. Word has length 1541 [2021-12-07 00:14:31,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:31,543 INFO L470 AbstractCegarLoop]: Abstraction has 9018 states and 9718 transitions. [2021-12-07 00:14:31,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:31,544 INFO L276 IsEmpty]: Start isEmpty. Operand 9018 states and 9718 transitions. [2021-12-07 00:14:31,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9018 [2021-12-07 00:14:31,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:31,911 INFO L514 BasicCegarLoop]: trace histogram [3456, 3456, 576, 576, 576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2021-12-07 00:14:31,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-07 00:14:32,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-07 00:14:32,112 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:32,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1229783514, now seen corresponding path program 6 times [2021-12-07 00:14:32,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:32,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118243774] [2021-12-07 00:14:32,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:32,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 14499074 backedges. 3172646 proven. 113309 refuted. 0 times theorem prover too weak. 11213119 trivial. 0 not checked. [2021-12-07 00:14:44,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:44,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118243774] [2021-12-07 00:14:44,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118243774] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:14:44,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347509325] [2021-12-07 00:14:44,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:14:44,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:44,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:44,379 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:44,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:14:49,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 755 check-sat command(s) [2021-12-07 00:14:49,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:14:49,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 5125 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:14:49,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 14499074 backedges. 3172656 proven. 113309 refuted. 0 times theorem prover too weak. 11213109 trivial. 0 not checked. [2021-12-07 00:14:55,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:14:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 14499074 backedges. 3172656 proven. 113309 refuted. 0 times theorem prover too weak. 11213109 trivial. 0 not checked. [2021-12-07 00:14:59,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347509325] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:14:59,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:14:59,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-07 00:14:59,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310921667] [2021-12-07 00:14:59,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:14:59,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 00:14:59,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:59,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 00:14:59,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:14:59,898 INFO L87 Difference]: Start difference. First operand 9018 states and 9718 transitions. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:00,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:15:00,857 INFO L93 Difference]: Finished difference Result 34861 states and 37582 transitions. [2021-12-07 00:15:00,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:15:00,857 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 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 9017 [2021-12-07 00:15:00,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:15:00,926 INFO L225 Difference]: With dead ends: 34861 [2021-12-07 00:15:00,926 INFO L226 Difference]: Without dead ends: 26970 [2021-12-07 00:15:00,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18037 GetRequests, 18030 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:15:00,937 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:15:00,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 88 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:15:00,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26970 states. [2021-12-07 00:15:01,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26970 to 26970. [2021-12-07 00:15:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26970 states, 26969 states have (on average 1.07701434980904) internal successors, (29046), 26969 states have internal predecessors, (29046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:01,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26970 states to 26970 states and 29046 transitions. [2021-12-07 00:15:01,855 INFO L78 Accepts]: Start accepts. Automaton has 26970 states and 29046 transitions. Word has length 9017 [2021-12-07 00:15:01,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:15:01,858 INFO L470 AbstractCegarLoop]: Abstraction has 26970 states and 29046 transitions. [2021-12-07 00:15:01,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 26970 states and 29046 transitions. [2021-12-07 00:15:05,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26970 [2021-12-07 00:15:05,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:15:05,338 INFO L514 BasicCegarLoop]: trace histogram [10368, 10368, 1728, 1728, 1728, 288, 288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2021-12-07 00:15:05,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-07 00:15:05,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3b8e68-5362-4ec0-927d-b2356c69d3a1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-07 00:15:05,540 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:15:05,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:15:05,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2046182950, now seen corresponding path program 7 times [2021-12-07 00:15:05,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:15:05,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295332] [2021-12-07 00:15:05,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:05,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:15:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat