./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_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_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/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_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/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_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/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 a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:12:04,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:12:04,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:12:04,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:12:04,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:12:04,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:12:04,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:12:04,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:12:04,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:12:04,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:12:04,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:12:04,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:12:04,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:12:04,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:12:04,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:12:04,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:12:04,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:12:04,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:12:04,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:12:04,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:12:04,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:12:04,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:12:04,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:12:04,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:12:04,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:12:04,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:12:04,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:12:04,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:12:04,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:12:04,543 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:12:04,544 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:12:04,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:12:04,545 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:12:04,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:12:04,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:12:04,547 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:12:04,548 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:12:04,548 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:12:04,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:12:04,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:12:04,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:12:04,551 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:12:04,573 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:12:04,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:12:04,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:12:04,574 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:12:04,575 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:12:04,575 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:12:04,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:12:04,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:12:04,576 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:12:04,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:12:04,577 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:12:04,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:12:04,577 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:12:04,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:12:04,577 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:12:04,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:12:04,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:12:04,578 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:12:04,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:12:04,578 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:12:04,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:12:04,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:12:04,579 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:12:04,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:12:04,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:12:04,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:12:04,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:12:04,580 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:12:04,580 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:12:04,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:12:04,581 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:12:04,581 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:12:04,581 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:12:04,581 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:12:04,582 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_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d [2021-12-07 00:12:04,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:12:04,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:12:04,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:12:04,809 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:12:04,810 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:12:04,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2021-12-07 00:12:04,850 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/data/7eee0ca77/8753067811af4e64aca9741433a28325/FLAGb8b9f1a68 [2021-12-07 00:12:05,202 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:12:05,203 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2021-12-07 00:12:05,207 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/data/7eee0ca77/8753067811af4e64aca9741433a28325/FLAGb8b9f1a68 [2021-12-07 00:12:05,216 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/data/7eee0ca77/8753067811af4e64aca9741433a28325 [2021-12-07 00:12:05,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:12:05,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:12:05,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:12:05,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:12:05,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:12:05,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:12:05" (1/1) ... [2021-12-07 00:12:05,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38436f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:05, skipping insertion in model container [2021-12-07 00:12:05,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:12:05" (1/1) ... [2021-12-07 00:12:05,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:12:05,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:12:05,337 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_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c[318,331] [2021-12-07 00:12:05,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:12:05,352 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:12:05,360 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_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c[318,331] [2021-12-07 00:12:05,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:12:05,373 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:12:05,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:05 WrapperNode [2021-12-07 00:12:05,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:12:05,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:12:05,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:12:05,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:12:05,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:05" (1/1) ... [2021-12-07 00:12:05,385 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:05" (1/1) ... [2021-12-07 00:12:05,397 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2021-12-07 00:12:05,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:12:05,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:12:05,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:12:05,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:12:05,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:05" (1/1) ... [2021-12-07 00:12:05,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:05" (1/1) ... [2021-12-07 00:12:05,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:05" (1/1) ... [2021-12-07 00:12:05,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:05" (1/1) ... [2021-12-07 00:12:05,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:05" (1/1) ... [2021-12-07 00:12:05,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:05" (1/1) ... [2021-12-07 00:12:05,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:05" (1/1) ... [2021-12-07 00:12:05,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:12:05,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:12:05,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:12:05,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:12:05,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:05" (1/1) ... [2021-12-07 00:12:05,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:12:05,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:05,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:12:05,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:12:05,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:12:05,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:12:05,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:12:05,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:12:05,535 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:12:05,537 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:12:05,617 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:12:05,623 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:12:05,623 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-07 00:12:05,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:12:05 BoogieIcfgContainer [2021-12-07 00:12:05,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:12:05,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:12:05,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:12:05,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:12:05,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:12:05" (1/3) ... [2021-12-07 00:12:05,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c3ad16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:12:05, skipping insertion in model container [2021-12-07 00:12:05,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:05" (2/3) ... [2021-12-07 00:12:05,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c3ad16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:12:05, skipping insertion in model container [2021-12-07 00:12:05,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:12:05" (3/3) ... [2021-12-07 00:12:05,633 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2021-12-07 00:12:05,639 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:12:05,639 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:12:05,680 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:12:05,685 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 00:12:05,685 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:12:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 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 00:12:05,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-07 00:12:05,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:05,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-07 00:12:05,700 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:05,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:05,704 INFO L85 PathProgramCache]: Analyzing trace with hash 889646744, now seen corresponding path program 1 times [2021-12-07 00:12:05,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:05,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312436517] [2021-12-07 00:12:05,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:05,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:05,819 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 00:12:05,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:05,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312436517] [2021-12-07 00:12:05,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312436517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:05,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:05,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:12:05,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614114779] [2021-12-07 00:12:05,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:05,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:05,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:05,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:05,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:05,849 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 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 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:05,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:05,875 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2021-12-07 00:12:05,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:05,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-07 00:12:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:05,885 INFO L225 Difference]: With dead ends: 28 [2021-12-07 00:12:05,885 INFO L226 Difference]: Without dead ends: 12 [2021-12-07 00:12:05,888 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 00:12:05,892 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:05,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:12:05,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-07 00:12:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-07 00:12:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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 00:12:05,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-12-07 00:12:05,925 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2021-12-07 00:12:05,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:05,925 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-12-07 00:12:05,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:05,925 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-12-07 00:12:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-07 00:12:05,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:05,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:05,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:12:05,927 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:05,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:05,927 INFO L85 PathProgramCache]: Analyzing trace with hash 295698875, now seen corresponding path program 1 times [2021-12-07 00:12:05,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:05,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055757516] [2021-12-07 00:12:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:05,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:05,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:05,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055757516] [2021-12-07 00:12:05,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055757516] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:05,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800753715] [2021-12-07 00:12:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:05,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:05,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:05,971 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:05,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:12:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:06,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:12:06,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:06,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:06,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800753715] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:06,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:06,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-07 00:12:06,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065458164] [2021-12-07 00:12:06,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:06,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:12:06,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:06,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:12:06,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:12:06,072 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:06,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:06,106 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2021-12-07 00:12:06,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:12:06,107 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-07 00:12:06,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:06,108 INFO L225 Difference]: With dead ends: 26 [2021-12-07 00:12:06,108 INFO L226 Difference]: Without dead ends: 18 [2021-12-07 00:12:06,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 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 00:12:06,110 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:06,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:12:06,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-07 00:12:06,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-12-07 00:12:06,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 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 00:12:06,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-12-07 00:12:06,115 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-12-07 00:12:06,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:06,115 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-12-07 00:12:06,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:06,115 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-12-07 00:12:06,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-07 00:12:06,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:06,116 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:06,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:12:06,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:06,318 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:06,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:06,320 INFO L85 PathProgramCache]: Analyzing trace with hash 890916581, now seen corresponding path program 1 times [2021-12-07 00:12:06,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:06,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741208651] [2021-12-07 00:12:06,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:06,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:12:06,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:06,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741208651] [2021-12-07 00:12:06,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741208651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:06,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:06,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:12:06,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333125416] [2021-12-07 00:12:06,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:06,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:12:06,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:06,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:12:06,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:06,444 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:06,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:06,501 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-12-07 00:12:06,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:12:06,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-07 00:12:06,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:06,505 INFO L225 Difference]: With dead ends: 29 [2021-12-07 00:12:06,505 INFO L226 Difference]: Without dead ends: 19 [2021-12-07 00:12:06,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:12:06,510 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:06,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:12:06,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-07 00:12:06,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-07 00:12:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:06,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-12-07 00:12:06,520 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2021-12-07 00:12:06,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:06,520 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-12-07 00:12:06,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:06,521 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-12-07 00:12:06,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-07 00:12:06,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:06,522 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:06,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 00:12:06,523 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:06,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:06,524 INFO L85 PathProgramCache]: Analyzing trace with hash -894818322, now seen corresponding path program 1 times [2021-12-07 00:12:06,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:06,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249194782] [2021-12-07 00:12:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:06,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:12:06,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:06,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249194782] [2021-12-07 00:12:06,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249194782] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:06,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786575731] [2021-12-07 00:12:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:06,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:06,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:06,574 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:06,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:12:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:06,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:12:06,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:12:06,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:12:06,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786575731] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:06,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:06,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-07 00:12:06,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218001806] [2021-12-07 00:12:06,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:06,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 00:12:06,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:06,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 00:12:06,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:12:06,689 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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 00:12:06,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:06,714 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-12-07 00:12:06,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:12:06,715 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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) Word has length 18 [2021-12-07 00:12:06,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:06,715 INFO L225 Difference]: With dead ends: 40 [2021-12-07 00:12:06,715 INFO L226 Difference]: Without dead ends: 27 [2021-12-07 00:12:06,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 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 00:12:06,717 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:06,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:12:06,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-07 00:12:06,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-07 00:12:06,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:06,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-07 00:12:06,721 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-12-07 00:12:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:06,722 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-07 00:12:06,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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 00:12:06,722 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-07 00:12:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-07 00:12:06,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:06,723 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:06,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:12:06,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-07 00:12:06,925 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:06,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:06,927 INFO L85 PathProgramCache]: Analyzing trace with hash 118887930, now seen corresponding path program 2 times [2021-12-07 00:12:06,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:06,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124878340] [2021-12-07 00:12:06,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:06,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:12:07,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:07,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124878340] [2021-12-07 00:12:07,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124878340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:07,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617608945] [2021-12-07 00:12:07,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:12:07,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:07,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:07,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:07,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:12:07,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:12:07,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:12:07,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 00:12:07,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:12:07,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:12:07,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617608945] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:07,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:07,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-07 00:12:07,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642085661] [2021-12-07 00:12:07,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:07,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-07 00:12:07,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:07,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-07 00:12:07,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:12:07,268 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 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 00:12:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:07,310 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2021-12-07 00:12:07,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 00:12:07,310 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-07 00:12:07,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:07,311 INFO L225 Difference]: With dead ends: 56 [2021-12-07 00:12:07,311 INFO L226 Difference]: Without dead ends: 43 [2021-12-07 00:12:07,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:12:07,312 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:07,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:12:07,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-07 00:12:07,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-07 00:12:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-12-07 00:12:07,320 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2021-12-07 00:12:07,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:07,320 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-12-07 00:12:07,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 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 00:12:07,321 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-12-07 00:12:07,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-07 00:12:07,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:07,322 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:07,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:12:07,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:07,524 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:07,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:07,526 INFO L85 PathProgramCache]: Analyzing trace with hash -173044206, now seen corresponding path program 3 times [2021-12-07 00:12:07,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:07,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038260391] [2021-12-07 00:12:07,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:07,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:12:07,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:07,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038260391] [2021-12-07 00:12:07,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038260391] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:07,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855884789] [2021-12-07 00:12:07,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:12:07,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:07,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:07,747 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:07,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:12:07,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-07 00:12:07,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:12:07,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:12:07,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-07 00:12:07,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-07 00:12:07,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855884789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:07,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:07,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 4, 4] total 21 [2021-12-07 00:12:07,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365148054] [2021-12-07 00:12:07,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:07,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 00:12:07,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:07,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 00:12:07,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-12-07 00:12:07,887 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 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 00:12:07,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:07,948 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2021-12-07 00:12:07,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 00:12:07,948 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-07 00:12:07,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:07,949 INFO L225 Difference]: With dead ends: 70 [2021-12-07 00:12:07,949 INFO L226 Difference]: Without dead ends: 57 [2021-12-07 00:12:07,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-12-07 00:12:07,950 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:07,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 30 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:12:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-07 00:12:07,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-07 00:12:07,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-12-07 00:12:07,956 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 42 [2021-12-07 00:12:07,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:07,956 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-12-07 00:12:07,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 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 00:12:07,957 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-12-07 00:12:07,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-07 00:12:07,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:07,958 INFO L514 BasicCegarLoop]: trace histogram [20, 15, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:07,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:12:08,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:08,160 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:08,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:08,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1187818742, now seen corresponding path program 4 times [2021-12-07 00:12:08,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:08,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635497451] [2021-12-07 00:12:08,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:08,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-07 00:12:08,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:08,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635497451] [2021-12-07 00:12:08,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635497451] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:08,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506527599] [2021-12-07 00:12:08,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:12:08,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:08,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:08,415 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:08,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:12:08,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:12:08,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:12:08,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 00:12:08,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-07 00:12:08,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-07 00:12:08,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506527599] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:08,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:08,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2021-12-07 00:12:08,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337624029] [2021-12-07 00:12:08,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:08,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-07 00:12:08,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:08,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-07 00:12:08,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-12-07 00:12:08,812 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 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 00:12:08,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:08,877 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2021-12-07 00:12:08,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-07 00:12:08,878 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 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 56 [2021-12-07 00:12:08,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:08,879 INFO L225 Difference]: With dead ends: 116 [2021-12-07 00:12:08,879 INFO L226 Difference]: Without dead ends: 91 [2021-12-07 00:12:08,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-12-07 00:12:08,881 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:08,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:12:08,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-07 00:12:08,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-07 00:12:08,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 90 states have internal predecessors, (100), 0 states have call successors, (0), 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 00:12:08,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-12-07 00:12:08,891 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 56 [2021-12-07 00:12:08,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:08,892 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-12-07 00:12:08,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 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 00:12:08,892 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-12-07 00:12:08,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-07 00:12:08,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:08,894 INFO L514 BasicCegarLoop]: trace histogram [37, 32, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:08,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 00:12:09,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-07 00:12:09,095 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:09,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:09,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1855342691, now seen corresponding path program 5 times [2021-12-07 00:12:09,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:09,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131339797] [2021-12-07 00:12:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:09,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 297 proven. 1056 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-07 00:12:09,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:09,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131339797] [2021-12-07 00:12:09,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131339797] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:09,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734483729] [2021-12-07 00:12:09,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:12:09,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:09,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:09,464 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:09,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:12:09,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-12-07 00:12:09,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:12:09,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 00:12:09,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-12-07 00:12:09,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-12-07 00:12:10,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734483729] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:10,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:10,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 17, 17] total 65 [2021-12-07 00:12:10,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900799645] [2021-12-07 00:12:10,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:10,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-07 00:12:10,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:10,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-07 00:12:10,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-12-07 00:12:10,278 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:10,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:10,522 INFO L93 Difference]: Finished difference Result 234 states and 311 transitions. [2021-12-07 00:12:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-07 00:12:10,523 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-12-07 00:12:10,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:10,524 INFO L225 Difference]: With dead ends: 234 [2021-12-07 00:12:10,524 INFO L226 Difference]: Without dead ends: 209 [2021-12-07 00:12:10,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-12-07 00:12:10,526 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 164 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:10,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 63 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:12:10,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-07 00:12:10,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-12-07 00:12:10,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.1875) internal successors, (247), 208 states have internal predecessors, (247), 0 states have call successors, (0), 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 00:12:10,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 247 transitions. [2021-12-07 00:12:10,539 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 247 transitions. Word has length 90 [2021-12-07 00:12:10,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:10,540 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 247 transitions. [2021-12-07 00:12:10,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:10,540 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 247 transitions. [2021-12-07 00:12:10,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-07 00:12:10,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:10,542 INFO L514 BasicCegarLoop]: trace histogram [67, 34, 34, 33, 30, 4, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:10,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:12:10,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:10,744 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:10,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:10,745 INFO L85 PathProgramCache]: Analyzing trace with hash 960421829, now seen corresponding path program 6 times [2021-12-07 00:12:10,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:10,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124797934] [2021-12-07 00:12:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:10,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 2278 proven. 1122 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2021-12-07 00:12:11,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:11,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124797934] [2021-12-07 00:12:11,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124797934] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:11,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350578481] [2021-12-07 00:12:11,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:12:11,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:11,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:11,226 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:11,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:12:11,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-07 00:12:11,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:12:11,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 00:12:11,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2021-12-07 00:12:11,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2021-12-07 00:12:11,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350578481] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:11,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:11,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 7, 7] total 46 [2021-12-07 00:12:11,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058545521] [2021-12-07 00:12:11,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:11,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 00:12:11,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:11,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 00:12:11,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:12:11,715 INFO L87 Difference]: Start difference. First operand 209 states and 247 transitions. Second operand has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 0 states have call successors, (0), 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 00:12:11,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:11,823 INFO L93 Difference]: Finished difference Result 376 states and 471 transitions. [2021-12-07 00:12:11,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-07 00:12:11,824 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 0 states have call successors, (0), 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 208 [2021-12-07 00:12:11,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:11,825 INFO L225 Difference]: With dead ends: 376 [2021-12-07 00:12:11,825 INFO L226 Difference]: Without dead ends: 235 [2021-12-07 00:12:11,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:12:11,828 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 54 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:11,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 30 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:12:11,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-07 00:12:11,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-12-07 00:12:11,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.2179487179487178) internal successors, (285), 234 states have internal predecessors, (285), 0 states have call successors, (0), 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 00:12:11,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 285 transitions. [2021-12-07 00:12:11,843 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 285 transitions. Word has length 208 [2021-12-07 00:12:11,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:11,844 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 285 transitions. [2021-12-07 00:12:11,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 0 states have call successors, (0), 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 00:12:11,844 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 285 transitions. [2021-12-07 00:12:11,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-07 00:12:11,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:11,849 INFO L514 BasicCegarLoop]: trace histogram [74, 40, 40, 34, 30, 10, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:11,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-07 00:12:12,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:12,051 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:12,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:12,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1401661778, now seen corresponding path program 7 times [2021-12-07 00:12:12,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:12,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829984337] [2021-12-07 00:12:12,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:12,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:12,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-07 00:12:12,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:12,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829984337] [2021-12-07 00:12:12,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829984337] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:12,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361621615] [2021-12-07 00:12:12,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:12:12,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:12,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:12,449 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:12,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:12:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:12,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-07 00:12:12,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-07 00:12:12,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-07 00:12:13,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361621615] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:13,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:13,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 73 [2021-12-07 00:12:13,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633018374] [2021-12-07 00:12:13,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:13,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-07 00:12:13,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:13,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-07 00:12:13,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-12-07 00:12:13,700 INFO L87 Difference]: Start difference. First operand 235 states and 285 transitions. Second operand has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:13,820 INFO L93 Difference]: Finished difference Result 472 states and 608 transitions. [2021-12-07 00:12:13,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-07 00:12:13,821 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2021-12-07 00:12:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:13,822 INFO L225 Difference]: With dead ends: 472 [2021-12-07 00:12:13,822 INFO L226 Difference]: Without dead ends: 307 [2021-12-07 00:12:13,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-12-07 00:12:13,824 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:13,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:12:13,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-12-07 00:12:13,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2021-12-07 00:12:13,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.1666666666666667) internal successors, (357), 306 states have internal predecessors, (357), 0 states have call successors, (0), 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 00:12:13,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 357 transitions. [2021-12-07 00:12:13,835 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 357 transitions. Word has length 234 [2021-12-07 00:12:13,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:13,835 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 357 transitions. [2021-12-07 00:12:13,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:13,835 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 357 transitions. [2021-12-07 00:12:13,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-07 00:12:13,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:13,839 INFO L514 BasicCegarLoop]: trace histogram [110, 70, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:13,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:12:14,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 00:12:14,040 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:14,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:14,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1256502206, now seen corresponding path program 8 times [2021-12-07 00:12:14,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:14,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997129708] [2021-12-07 00:12:14,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:14,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-07 00:12:15,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:15,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997129708] [2021-12-07 00:12:15,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997129708] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:15,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449256072] [2021-12-07 00:12:15,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:12:15,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:15,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:15,167 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:15,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:12:15,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:12:15,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:12:15,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-07 00:12:15,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-07 00:12:15,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-07 00:12:18,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449256072] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:18,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:18,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 145 [2021-12-07 00:12:18,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697321138] [2021-12-07 00:12:18,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:18,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2021-12-07 00:12:18,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:18,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-12-07 00:12:18,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2021-12-07 00:12:18,681 INFO L87 Difference]: Start difference. First operand 307 states and 357 transitions. Second operand has 145 states, 145 states have (on average 2.0620689655172413) internal successors, (299), 145 states have internal predecessors, (299), 0 states have call successors, (0), 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 00:12:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:19,004 INFO L93 Difference]: Finished difference Result 616 states and 788 transitions. [2021-12-07 00:12:19,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-12-07 00:12:19,005 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.0620689655172413) internal successors, (299), 145 states have internal predecessors, (299), 0 states have call successors, (0), 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 306 [2021-12-07 00:12:19,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:19,008 INFO L225 Difference]: With dead ends: 616 [2021-12-07 00:12:19,008 INFO L226 Difference]: Without dead ends: 451 [2021-12-07 00:12:19,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2021-12-07 00:12:19,013 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:19,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:12:19,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-12-07 00:12:19,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2021-12-07 00:12:19,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.1133333333333333) internal successors, (501), 450 states have internal predecessors, (501), 0 states have call successors, (0), 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 00:12:19,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 501 transitions. [2021-12-07 00:12:19,025 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 501 transitions. Word has length 306 [2021-12-07 00:12:19,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:19,025 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 501 transitions. [2021-12-07 00:12:19,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.0620689655172413) internal successors, (299), 145 states have internal predecessors, (299), 0 states have call successors, (0), 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 00:12:19,025 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 501 transitions. [2021-12-07 00:12:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2021-12-07 00:12:19,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:19,027 INFO L514 BasicCegarLoop]: trace histogram [182, 142, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:19,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 00:12:19,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:19,229 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:19,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:19,230 INFO L85 PathProgramCache]: Analyzing trace with hash -932895594, now seen corresponding path program 9 times [2021-12-07 00:12:19,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:19,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777468517] [2021-12-07 00:12:19,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:19,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 11297 proven. 20306 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-07 00:12:23,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:23,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777468517] [2021-12-07 00:12:23,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777468517] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:23,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127455057] [2021-12-07 00:12:23,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:12:23,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:23,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:23,385 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:23,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 00:12:23,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-07 00:12:23,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:12:23,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 00:12:23,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:24,329 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2021-12-07 00:12:24,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2021-12-07 00:12:25,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127455057] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:25,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:25,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 13, 13] total 167 [2021-12-07 00:12:25,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448821836] [2021-12-07 00:12:25,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:25,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2021-12-07 00:12:25,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:25,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2021-12-07 00:12:25,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2021-12-07 00:12:25,261 INFO L87 Difference]: Start difference. First operand 451 states and 501 transitions. Second operand has 167 states, 167 states have (on average 2.3293413173652695) internal successors, (389), 167 states have internal predecessors, (389), 0 states have call successors, (0), 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 00:12:26,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:26,114 INFO L93 Difference]: Finished difference Result 666 states and 803 transitions. [2021-12-07 00:12:26,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-12-07 00:12:26,115 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 2.3293413173652695) internal successors, (389), 167 states have internal predecessors, (389), 0 states have call successors, (0), 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 450 [2021-12-07 00:12:26,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:26,117 INFO L225 Difference]: With dead ends: 666 [2021-12-07 00:12:26,117 INFO L226 Difference]: Without dead ends: 501 [2021-12-07 00:12:26,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1043 GetRequests, 878 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2021-12-07 00:12:26,119 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 352 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 1097 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1097 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:26,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 39 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1097 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:12:26,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-12-07 00:12:26,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2021-12-07 00:12:26,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.15) internal successors, (575), 500 states have internal predecessors, (575), 0 states have call successors, (0), 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 00:12:26,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 575 transitions. [2021-12-07 00:12:26,132 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 575 transitions. Word has length 450 [2021-12-07 00:12:26,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:26,132 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 575 transitions. [2021-12-07 00:12:26,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 2.3293413173652695) internal successors, (389), 167 states have internal predecessors, (389), 0 states have call successors, (0), 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 00:12:26,132 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 575 transitions. [2021-12-07 00:12:26,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2021-12-07 00:12:26,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:26,135 INFO L514 BasicCegarLoop]: trace histogram [195, 143, 52, 52, 30, 22, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:26,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 00:12:26,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:26,335 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:26,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:26,336 INFO L85 PathProgramCache]: Analyzing trace with hash -278359667, now seen corresponding path program 10 times [2021-12-07 00:12:26,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:26,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751711808] [2021-12-07 00:12:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:26,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-12-07 00:12:30,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:30,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751711808] [2021-12-07 00:12:30,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751711808] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:30,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348400379] [2021-12-07 00:12:30,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:12:30,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:30,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:30,486 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:30,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 00:12:30,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:12:30,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:12:30,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 145 conjunts are in the unsatisfiable core [2021-12-07 00:12:30,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-12-07 00:12:31,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-12-07 00:12:42,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348400379] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:42,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:42,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146, 146] total 291 [2021-12-07 00:12:42,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057654105] [2021-12-07 00:12:42,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:42,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 291 states [2021-12-07 00:12:42,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:43,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 291 interpolants. [2021-12-07 00:12:43,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42195, Invalid=42195, Unknown=0, NotChecked=0, Total=84390 [2021-12-07 00:12:43,009 INFO L87 Difference]: Start difference. First operand 501 states and 575 transitions. Second operand has 291 states, 291 states have (on average 2.0309278350515463) internal successors, (591), 291 states have internal predecessors, (591), 0 states have call successors, (0), 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 00:12:44,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:44,035 INFO L93 Difference]: Finished difference Result 1004 states and 1297 transitions. [2021-12-07 00:12:44,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-12-07 00:12:44,036 INFO L78 Accepts]: Start accepts. Automaton has has 291 states, 291 states have (on average 2.0309278350515463) internal successors, (591), 291 states have internal predecessors, (591), 0 states have call successors, (0), 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 500 [2021-12-07 00:12:44,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:44,039 INFO L225 Difference]: With dead ends: 1004 [2021-12-07 00:12:44,039 INFO L226 Difference]: Without dead ends: 791 [2021-12-07 00:12:44,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1144 GetRequests, 855 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=42195, Invalid=42195, Unknown=0, NotChecked=0, Total=84390 [2021-12-07 00:12:44,044 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:12:44,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:12:44,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-12-07 00:12:44,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 791. [2021-12-07 00:12:44,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.0949367088607596) internal successors, (865), 790 states have internal predecessors, (865), 0 states have call successors, (0), 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 00:12:44,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 865 transitions. [2021-12-07 00:12:44,064 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 865 transitions. Word has length 500 [2021-12-07 00:12:44,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:44,065 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 865 transitions. [2021-12-07 00:12:44,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 291 states, 291 states have (on average 2.0309278350515463) internal successors, (591), 291 states have internal predecessors, (591), 0 states have call successors, (0), 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 00:12:44,065 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 865 transitions. [2021-12-07 00:12:44,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2021-12-07 00:12:44,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:44,074 INFO L514 BasicCegarLoop]: trace histogram [340, 288, 52, 52, 30, 22, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:44,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 00:12:44,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-07 00:12:44,275 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:44,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:44,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1077236000, now seen corresponding path program 11 times [2021-12-07 00:12:44,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:44,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843566556] [2021-12-07 00:12:44,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:44,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 29767 proven. 83232 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-12-07 00:13:00,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:00,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843566556] [2021-12-07 00:13:00,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843566556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:13:00,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709519723] [2021-12-07 00:13:00,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:13:00,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:00,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:13:00,409 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:13:00,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 00:13:01,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 298 check-sat command(s) [2021-12-07 00:13:01,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:13:01,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 151 conjunts are in the unsatisfiable core [2021-12-07 00:13:01,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:13:22,869 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 65688 proven. 22952 refuted. 0 times theorem prover too weak. 29612 trivial. 0 not checked. [2021-12-07 00:13:22,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:13:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 65688 proven. 22952 refuted. 0 times theorem prover too weak. 29612 trivial. 0 not checked. [2021-12-07 00:13:53,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709519723] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:13:53,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:13:53,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [291, 151, 151] total 589 [2021-12-07 00:13:53,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820352236] [2021-12-07 00:13:53,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:13:53,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 589 states [2021-12-07 00:13:53,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:53,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 589 interpolants. [2021-12-07 00:13:53,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173166, Invalid=173166, Unknown=0, NotChecked=0, Total=346332 [2021-12-07 00:13:53,867 INFO L87 Difference]: Start difference. First operand 791 states and 865 transitions. Second operand has 589 states, 589 states have (on average 2.2275042444821733) internal successors, (1312), 589 states have internal predecessors, (1312), 0 states have call successors, (0), 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 00:17:40,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:17:40,077 INFO L93 Difference]: Finished difference Result 2078 states and 2763 transitions. [2021-12-07 00:17:40,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 589 states. [2021-12-07 00:17:40,078 INFO L78 Accepts]: Start accepts. Automaton has has 589 states, 589 states have (on average 2.2275042444821733) internal successors, (1312), 589 states have internal predecessors, (1312), 0 states have call successors, (0), 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 790 [2021-12-07 00:17:40,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:17:40,086 INFO L225 Difference]: With dead ends: 2078 [2021-12-07 00:17:40,086 INFO L226 Difference]: Without dead ends: 1865 [2021-12-07 00:17:40,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1869 GetRequests, 1282 SyntacticMatches, 0 SemanticMatches, 587 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.0s TimeCoverageRelationStatistics Valid=173166, Invalid=173166, Unknown=0, NotChecked=0, Total=346332 [2021-12-07 00:17:40,104 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 2724 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 4907 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2724 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 6407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4907 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:17:40,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2724 Valid, 327 Invalid, 6407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4907 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-07 00:17:40,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2021-12-07 00:17:40,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1865. [2021-12-07 00:17:40,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 1.1840128755364807) internal successors, (2207), 1864 states have internal predecessors, (2207), 0 states have call successors, (0), 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 00:17:40,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 2207 transitions. [2021-12-07 00:17:40,144 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 2207 transitions. Word has length 790 [2021-12-07 00:17:40,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:17:40,145 INFO L470 AbstractCegarLoop]: Abstraction has 1865 states and 2207 transitions. [2021-12-07 00:17:40,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 589 states, 589 states have (on average 2.2275042444821733) internal successors, (1312), 589 states have internal predecessors, (1312), 0 states have call successors, (0), 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 00:17:40,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 2207 transitions. [2021-12-07 00:17:40,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1865 [2021-12-07 00:17:40,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:17:40,163 INFO L514 BasicCegarLoop]: trace histogram [609, 320, 320, 298, 289, 22, 1, 1, 1, 1, 1, 1] [2021-12-07 00:17:40,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 00:17:40,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:17:40,365 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:17:40,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:17:40,368 INFO L85 PathProgramCache]: Analyzing trace with hash -944903505, now seen corresponding path program 12 times [2021-12-07 00:17:40,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:17:40,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284183163] [2021-12-07 00:17:40,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:17:40,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:17:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:17:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 185310 proven. 83810 refuted. 0 times theorem prover too weak. 203841 trivial. 0 not checked. [2021-12-07 00:17:57,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:17:57,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284183163] [2021-12-07 00:17:57,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284183163] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:17:57,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522054258] [2021-12-07 00:17:57,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:17:57,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:17:57,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:17:57,039 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:17:57,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 00:17:57,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2021-12-07 00:17:57,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:17:57,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-07 00:17:57,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:18:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 39802 proven. 968 refuted. 0 times theorem prover too weak. 432191 trivial. 0 not checked. [2021-12-07 00:18:00,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:18:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 39802 proven. 968 refuted. 0 times theorem prover too weak. 432191 trivial. 0 not checked. [2021-12-07 00:18:04,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522054258] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:18:04,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:18:04,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [292, 25, 25] total 338 [2021-12-07 00:18:04,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640741481] [2021-12-07 00:18:04,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:18:04,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 338 states [2021-12-07 00:18:04,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:18:04,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 338 interpolants. [2021-12-07 00:18:04,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56953, Invalid=56953, Unknown=0, NotChecked=0, Total=113906 [2021-12-07 00:18:04,612 INFO L87 Difference]: Start difference. First operand 1865 states and 2207 transitions. Second operand has 338 states, 338 states have (on average 2.304733727810651) internal successors, (779), 338 states have internal predecessors, (779), 0 states have call successors, (0), 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 00:18:10,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:18:10,355 INFO L93 Difference]: Finished difference Result 3248 states and 4005 transitions. [2021-12-07 00:18:10,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 338 states. [2021-12-07 00:18:10,356 INFO L78 Accepts]: Start accepts. Automaton has has 338 states, 338 states have (on average 2.304733727810651) internal successors, (779), 338 states have internal predecessors, (779), 0 states have call successors, (0), 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 1864 [2021-12-07 00:18:10,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:18:10,367 INFO L225 Difference]: With dead ends: 3248 [2021-12-07 00:18:10,367 INFO L226 Difference]: Without dead ends: 1963 [2021-12-07 00:18:10,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4018 GetRequests, 3682 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=56953, Invalid=56953, Unknown=0, NotChecked=0, Total=113906 [2021-12-07 00:18:10,376 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 382 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:18:10,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 77 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-07 00:18:10,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2021-12-07 00:18:10,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1963. [2021-12-07 00:18:10,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 1.1992864424057084) internal successors, (2353), 1962 states have internal predecessors, (2353), 0 states have call successors, (0), 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 00:18:10,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 2353 transitions. [2021-12-07 00:18:10,416 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 2353 transitions. Word has length 1864 [2021-12-07 00:18:10,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:18:10,416 INFO L470 AbstractCegarLoop]: Abstraction has 1963 states and 2353 transitions. [2021-12-07 00:18:10,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 338 states, 338 states have (on average 2.304733727810651) internal successors, (779), 338 states have internal predecessors, (779), 0 states have call successors, (0), 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 00:18:10,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 2353 transitions. [2021-12-07 00:18:10,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1963 [2021-12-07 00:18:10,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:18:10,436 INFO L514 BasicCegarLoop]: trace histogram [634, 344, 344, 298, 290, 46, 1, 1, 1, 1, 1, 1] [2021-12-07 00:18:10,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 00:18:10,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-07 00:18:10,636 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:18:10,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:18:10,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1262359994, now seen corresponding path program 13 times [2021-12-07 00:18:10,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:18:10,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585858177] [2021-12-07 00:18:10,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:18:10,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:18:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:18:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 519948 backedges. 199917 proven. 84390 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2021-12-07 00:18:27,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:18:27,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585858177] [2021-12-07 00:18:27,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585858177] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:18:27,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186484369] [2021-12-07 00:18:27,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:18:27,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:18:27,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:18:27,222 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:18:27,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 00:18:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:18:27,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 3607 conjuncts, 292 conjunts are in the unsatisfiable core [2021-12-07 00:18:27,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:18:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 519948 backedges. 199917 proven. 84390 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2021-12-07 00:18:28,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:19:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 519948 backedges. 199917 proven. 84390 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2021-12-07 00:19:18,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186484369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:19:18,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:19:18,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [293, 293, 293] total 585 [2021-12-07 00:19:18,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766980329] [2021-12-07 00:19:18,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:19:18,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 585 states [2021-12-07 00:19:18,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:19:18,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 585 interpolants. [2021-12-07 00:19:18,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170820, Invalid=170820, Unknown=0, NotChecked=0, Total=341640 [2021-12-07 00:19:18,433 INFO L87 Difference]: Start difference. First operand 1963 states and 2353 transitions. Second operand has 585 states, 585 states have (on average 2.0153846153846153) internal successors, (1179), 585 states have internal predecessors, (1179), 0 states have call successors, (0), 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 00:19:28,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:19:28,626 INFO L93 Difference]: Finished difference Result 3928 states and 5000 transitions. [2021-12-07 00:19:28,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 584 states. [2021-12-07 00:19:28,627 INFO L78 Accepts]: Start accepts. Automaton has has 585 states, 585 states have (on average 2.0153846153846153) internal successors, (1179), 585 states have internal predecessors, (1179), 0 states have call successors, (0), 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 1962 [2021-12-07 00:19:28,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:19:28,637 INFO L225 Difference]: With dead ends: 3928 [2021-12-07 00:19:28,637 INFO L226 Difference]: Without dead ends: 2547 [2021-12-07 00:19:28,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4215 GetRequests, 3632 SyntacticMatches, 0 SemanticMatches, 583 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 63.6s TimeCoverageRelationStatistics Valid=170820, Invalid=170820, Unknown=0, NotChecked=0, Total=341640 [2021-12-07 00:19:28,652 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:19:28,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-07 00:19:28,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2021-12-07 00:19:28,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 2547. [2021-12-07 00:19:28,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2546 states have (on average 1.1535742340926944) internal successors, (2937), 2546 states have internal predecessors, (2937), 0 states have call successors, (0), 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 00:19:28,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 2937 transitions. [2021-12-07 00:19:28,700 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 2937 transitions. Word has length 1962 [2021-12-07 00:19:28,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:19:28,701 INFO L470 AbstractCegarLoop]: Abstraction has 2547 states and 2937 transitions. [2021-12-07 00:19:28,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 585 states, 585 states have (on average 2.0153846153846153) internal successors, (1179), 585 states have internal predecessors, (1179), 0 states have call successors, (0), 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 00:19:28,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 2937 transitions. [2021-12-07 00:19:28,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2547 [2021-12-07 00:19:28,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:19:28,743 INFO L514 BasicCegarLoop]: trace histogram [926, 582, 344, 344, 298, 46, 1, 1, 1, 1, 1, 1] [2021-12-07 00:19:28,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 00:19:28,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-07 00:19:28,944 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:19:28,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:19:28,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1268450086, now seen corresponding path program 14 times [2021-12-07 00:19:28,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:19:28,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720863338] [2021-12-07 00:19:28,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:19:28,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:19:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:20:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 975468 backedges. 400521 proven. 339306 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2021-12-07 00:20:35,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:20:35,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720863338] [2021-12-07 00:20:35,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720863338] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:20:35,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226101968] [2021-12-07 00:20:35,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:20:35,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:20:35,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:20:35,142 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:20:35,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7c6e29e-2301-4fd0-b7ba-60b64cd0d489/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 00:20:35,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:20:35,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:20:35,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 4775 conjuncts, 584 conjunts are in the unsatisfiable core [2021-12-07 00:20:35,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:20:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 975468 backedges. 400521 proven. 339306 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2021-12-07 00:20:37,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:24:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 975468 backedges. 400521 proven. 339306 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2021-12-07 00:24:05,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226101968] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:24:05,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:24:05,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [585, 585, 585] total 1169 [2021-12-07 00:24:05,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5460114] [2021-12-07 00:24:05,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:24:05,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 1169 states [2021-12-07 00:24:05,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:24:05,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1169 interpolants. [2021-12-07 00:24:05,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682696, Invalid=682696, Unknown=0, NotChecked=0, Total=1365392 [2021-12-07 00:24:05,289 INFO L87 Difference]: Start difference. First operand 2547 states and 2937 transitions. Second operand has 1169 states, 1169 states have (on average 2.007698887938409) internal successors, (2347), 1169 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)