./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/eureka_01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/eureka_01-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg --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 a7ef5e9072271cbf0486c6be0aa2bd26b235c6b4341d8940adfe18a5a48a6524 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:20:52,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:20:52,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:20:52,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:20:52,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:20:52,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:20:52,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:20:52,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:20:52,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:20:52,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:20:52,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:20:52,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:20:52,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:20:52,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:20:52,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:20:52,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:20:52,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:20:52,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:20:52,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:20:52,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:20:52,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:20:52,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:20:52,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:20:52,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:20:52,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:20:52,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:20:52,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:20:52,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:20:52,520 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:20:52,521 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:20:52,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:20:52,523 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:20:52,525 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:20:52,527 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:20:52,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:20:52,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:20:52,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:20:52,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:20:52,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:20:52,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:20:52,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:20:52,536 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 09:20:52,570 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:20:52,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:20:52,571 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:20:52,571 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:20:52,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:20:52,574 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:20:52,574 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:20:52,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:20:52,575 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:20:52,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:20:52,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:20:52,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:20:52,577 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 09:20:52,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:20:52,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 09:20:52,579 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:20:52,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:20:52,580 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:20:52,580 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 09:20:52,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:20:52,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:20:52,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:20:52,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:20:52,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:20:52,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:20:52,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 09:20:52,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:20:52,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:20:52,584 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 09:20:52,585 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 09:20:52,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 09:20:52,585 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:20:52,586 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_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7ef5e9072271cbf0486c6be0aa2bd26b235c6b4341d8940adfe18a5a48a6524 [2021-10-28 09:20:52,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:20:52,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:20:52,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:20:52,921 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:20:52,922 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:20:52,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/loops/eureka_01-1.c [2021-10-28 09:20:53,027 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/data/b038ac112/bb3081b8f2964f47bf8cc1d6727e7987/FLAG1b6d40ec3 [2021-10-28 09:20:53,607 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:20:53,613 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/sv-benchmarks/c/loops/eureka_01-1.c [2021-10-28 09:20:53,623 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/data/b038ac112/bb3081b8f2964f47bf8cc1d6727e7987/FLAG1b6d40ec3 [2021-10-28 09:20:53,927 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/data/b038ac112/bb3081b8f2964f47bf8cc1d6727e7987 [2021-10-28 09:20:53,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:20:53,932 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:20:53,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:20:53,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:20:53,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:20:53,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:20:53" (1/1) ... [2021-10-28 09:20:53,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b3f4c01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:53, skipping insertion in model container [2021-10-28 09:20:53,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:20:53" (1/1) ... [2021-10-28 09:20:53,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:20:54,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:20:54,213 WARN L228 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_732c6c37-7f56-4423-8ab2-ffb7b562e293/sv-benchmarks/c/loops/eureka_01-1.c[446,459] [2021-10-28 09:20:54,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:20:54,263 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:20:54,278 WARN L228 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_732c6c37-7f56-4423-8ab2-ffb7b562e293/sv-benchmarks/c/loops/eureka_01-1.c[446,459] [2021-10-28 09:20:54,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:20:54,329 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:20:54,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:54 WrapperNode [2021-10-28 09:20:54,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:20:54,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:20:54,332 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:20:54,332 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:20:54,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:54" (1/1) ... [2021-10-28 09:20:54,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:54" (1/1) ... [2021-10-28 09:20:54,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:20:54,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:20:54,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:20:54,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:20:54,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:54" (1/1) ... [2021-10-28 09:20:54,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:54" (1/1) ... [2021-10-28 09:20:54,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:54" (1/1) ... [2021-10-28 09:20:54,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:54" (1/1) ... [2021-10-28 09:20:54,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:54" (1/1) ... [2021-10-28 09:20:54,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:54" (1/1) ... [2021-10-28 09:20:54,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:54" (1/1) ... [2021-10-28 09:20:54,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:20:54,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:20:54,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:20:54,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:20:54,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:54" (1/1) ... [2021-10-28 09:20:54,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:20:54,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:54,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:20:54,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:20:54,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:20:54,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:20:54,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:20:54,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:20:54,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:20:54,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 09:20:54,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:20:54,986 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:20:54,986 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-28 09:20:54,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:20:54 BoogieIcfgContainer [2021-10-28 09:20:54,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:20:54,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:20:54,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:20:54,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:20:54,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:20:53" (1/3) ... [2021-10-28 09:20:54,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210d958e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:20:54, skipping insertion in model container [2021-10-28 09:20:54,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:54" (2/3) ... [2021-10-28 09:20:54,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210d958e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:20:54, skipping insertion in model container [2021-10-28 09:20:55,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:20:54" (3/3) ... [2021-10-28 09:20:55,001 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-1.c [2021-10-28 09:20:55,008 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:20:55,009 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 09:20:55,074 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:20:55,084 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 [2021-10-28 09:20:55,085 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 09:20:55,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 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) [2021-10-28 09:20:55,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 09:20:55,113 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:55,114 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:55,115 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:20:55,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:55,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1963003136, now seen corresponding path program 1 times [2021-10-28 09:20:55,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:55,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795694693] [2021-10-28 09:20:55,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:55,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:55,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:55,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795694693] [2021-10-28 09:20:55,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795694693] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:20:55,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:20:55,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:20:55,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967623529] [2021-10-28 09:20:55,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:20:55,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:55,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:20:55,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:20:55,584 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 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) Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-10-28 09:20:55,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:55,764 INFO L93 Difference]: Finished difference Result 89 states and 135 transitions. [2021-10-28 09:20:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:20:55,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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 13 [2021-10-28 09:20:55,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:55,780 INFO L225 Difference]: With dead ends: 89 [2021-10-28 09:20:55,781 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 09:20:55,785 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:20:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 09:20:55,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 26. [2021-10-28 09:20:55,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:55,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-10-28 09:20:55,830 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2021-10-28 09:20:55,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:55,831 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-10-28 09:20:55,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-10-28 09:20:55,832 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-10-28 09:20:55,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:20:55,833 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:55,834 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:55,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:20:55,835 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:20:55,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:55,836 INFO L85 PathProgramCache]: Analyzing trace with hash 629591390, now seen corresponding path program 1 times [2021-10-28 09:20:55,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:55,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076157273] [2021-10-28 09:20:55,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:55,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:20:56,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:56,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076157273] [2021-10-28 09:20:56,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076157273] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:56,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162574320] [2021-10-28 09:20:56,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:56,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:56,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:56,281 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:56,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:20:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:56,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:20:56,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:56,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 09:20:56,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-10-28 09:20:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:20:56,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162574320] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:56,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:56,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-28 09:20:56,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126123638] [2021-10-28 09:20:57,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:20:57,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:57,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:20:57,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:20:57,007 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:57,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:57,204 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2021-10-28 09:20:57,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:20:57,206 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-28 09:20:57,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:57,210 INFO L225 Difference]: With dead ends: 70 [2021-10-28 09:20:57,211 INFO L226 Difference]: Without dead ends: 68 [2021-10-28 09:20:57,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:20:57,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-28 09:20:57,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2021-10-28 09:20:57,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 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) [2021-10-28 09:20:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2021-10-28 09:20:57,243 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 19 [2021-10-28 09:20:57,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:57,245 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2021-10-28 09:20:57,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:57,250 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2021-10-28 09:20:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:20:57,253 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:57,253 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:57,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:57,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:57,481 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:20:57,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:57,482 INFO L85 PathProgramCache]: Analyzing trace with hash -381525860, now seen corresponding path program 1 times [2021-10-28 09:20:57,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:57,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281074481] [2021-10-28 09:20:57,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:57,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:20:57,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:57,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281074481] [2021-10-28 09:20:57,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281074481] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:20:57,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:20:57,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:20:57,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381423029] [2021-10-28 09:20:57,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:20:57,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:57,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:20:57,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:20:57,614 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-10-28 09:20:57,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:57,665 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2021-10-28 09:20:57,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:20:57,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 19 [2021-10-28 09:20:57,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:57,669 INFO L225 Difference]: With dead ends: 66 [2021-10-28 09:20:57,669 INFO L226 Difference]: Without dead ends: 45 [2021-10-28 09:20:57,670 INFO L786 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 [2021-10-28 09:20:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-28 09:20:57,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-10-28 09:20:57,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 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) [2021-10-28 09:20:57,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-10-28 09:20:57,688 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 19 [2021-10-28 09:20:57,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:57,688 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-10-28 09:20:57,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-10-28 09:20:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-10-28 09:20:57,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 09:20:57,691 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:57,691 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:57,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 09:20:57,692 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:20:57,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:57,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1960843935, now seen corresponding path program 1 times [2021-10-28 09:20:57,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:57,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999411736] [2021-10-28 09:20:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:57,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:20:57,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:57,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999411736] [2021-10-28 09:20:57,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999411736] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:57,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438518848] [2021-10-28 09:20:57,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:57,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:57,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:57,899 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:57,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:20:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:58,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:20:58,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:20:58,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438518848] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:58,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:58,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-10-28 09:20:58,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860428606] [2021-10-28 09:20:58,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:20:58,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:58,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:20:58,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:20:58,150 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:58,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:58,278 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2021-10-28 09:20:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:20:58,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-28 09:20:58,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:58,285 INFO L225 Difference]: With dead ends: 114 [2021-10-28 09:20:58,285 INFO L226 Difference]: Without dead ends: 86 [2021-10-28 09:20:58,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:20:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-28 09:20:58,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2021-10-28 09:20:58,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.309090909090909) internal successors, (72), 55 states have internal predecessors, (72), 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) [2021-10-28 09:20:58,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2021-10-28 09:20:58,317 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 22 [2021-10-28 09:20:58,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:58,318 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2021-10-28 09:20:58,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:58,321 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2021-10-28 09:20:58,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 09:20:58,323 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:58,324 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:58,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:58,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:58,544 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:20:58,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:58,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1926841972, now seen corresponding path program 1 times [2021-10-28 09:20:58,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:58,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865729297] [2021-10-28 09:20:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:58,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:58,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:58,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865729297] [2021-10-28 09:20:58,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865729297] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:58,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620724755] [2021-10-28 09:20:58,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:58,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:58,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:58,685 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:58,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:20:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:58,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:20:58,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:58,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620724755] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:58,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:58,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-10-28 09:20:58,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114470530] [2021-10-28 09:20:58,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:20:58,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:58,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:20:58,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:20:58,980 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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) [2021-10-28 09:20:59,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:59,289 INFO L93 Difference]: Finished difference Result 181 states and 231 transitions. [2021-10-28 09:20:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:20:59,290 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-28 09:20:59,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:59,292 INFO L225 Difference]: With dead ends: 181 [2021-10-28 09:20:59,293 INFO L226 Difference]: Without dead ends: 159 [2021-10-28 09:20:59,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:20:59,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-10-28 09:20:59,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 75. [2021-10-28 09:20:59,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 74 states have internal predecessors, (98), 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) [2021-10-28 09:20:59,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-10-28 09:20:59,309 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 22 [2021-10-28 09:20:59,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:59,310 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-10-28 09:20:59,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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) [2021-10-28 09:20:59,311 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-10-28 09:20:59,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 09:20:59,312 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:59,313 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:59,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:59,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:59,541 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:20:59,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:59,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1234267636, now seen corresponding path program 1 times [2021-10-28 09:20:59,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:59,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131835825] [2021-10-28 09:20:59,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:59,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:20:59,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:59,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131835825] [2021-10-28 09:20:59,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131835825] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:59,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524033045] [2021-10-28 09:20:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:59,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:59,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:59,634 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:59,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:20:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:59,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:20:59,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:20:59,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524033045] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:59,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:20:59,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-10-28 09:20:59,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158770571] [2021-10-28 09:20:59,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:20:59,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:59,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:20:59,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:20:59,928 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:00,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:00,100 INFO L93 Difference]: Finished difference Result 206 states and 263 transitions. [2021-10-28 09:21:00,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:21:00,101 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-28 09:21:00,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:00,102 INFO L225 Difference]: With dead ends: 206 [2021-10-28 09:21:00,103 INFO L226 Difference]: Without dead ends: 146 [2021-10-28 09:21:00,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:21:00,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-28 09:21:00,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 92. [2021-10-28 09:21:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.3076923076923077) internal successors, (119), 91 states have internal predecessors, (119), 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) [2021-10-28 09:21:00,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 119 transitions. [2021-10-28 09:21:00,121 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 119 transitions. Word has length 23 [2021-10-28 09:21:00,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:00,122 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 119 transitions. [2021-10-28 09:21:00,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:00,123 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 119 transitions. [2021-10-28 09:21:00,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 09:21:00,125 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:00,125 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:00,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:21:00,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:00,352 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:21:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:00,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1741027445, now seen corresponding path program 1 times [2021-10-28 09:21:00,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:00,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144144126] [2021-10-28 09:21:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:00,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:21:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:21:01,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:01,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144144126] [2021-10-28 09:21:01,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144144126] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:01,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417136261] [2021-10-28 09:21:01,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:01,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:01,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:21:01,268 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:21:01,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:21:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:21:01,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 09:21:01,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:21:01,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-10-28 09:21:01,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-28 09:21:01,846 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-10-28 09:21:01,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-10-28 09:21:02,548 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-28 09:21:02,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 40 [2021-10-28 09:21:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:21:02,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417136261] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:02,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:21:02,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-10-28 09:21:02,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841056764] [2021-10-28 09:21:02,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 09:21:02,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:02,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 09:21:02,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:21:02,606 INFO L87 Difference]: Start difference. First operand 92 states and 119 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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) [2021-10-28 09:21:05,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:05,562 INFO L93 Difference]: Finished difference Result 252 states and 308 transitions. [2021-10-28 09:21:05,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-28 09:21:05,562 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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) Word has length 25 [2021-10-28 09:21:05,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:05,566 INFO L225 Difference]: With dead ends: 252 [2021-10-28 09:21:05,566 INFO L226 Difference]: Without dead ends: 230 [2021-10-28 09:21:05,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=534, Invalid=1916, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 09:21:05,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-10-28 09:21:05,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 96. [2021-10-28 09:21:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.3263157894736841) internal successors, (126), 95 states have internal predecessors, (126), 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) [2021-10-28 09:21:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2021-10-28 09:21:05,604 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 25 [2021-10-28 09:21:05,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:05,606 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2021-10-28 09:21:05,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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) [2021-10-28 09:21:05,607 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2021-10-28 09:21:05,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 09:21:05,615 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:05,616 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:05,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-28 09:21:05,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-28 09:21:05,837 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:21:05,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:05,837 INFO L85 PathProgramCache]: Analyzing trace with hash -858936254, now seen corresponding path program 2 times [2021-10-28 09:21:05,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:05,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2149943] [2021-10-28 09:21:05,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:05,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:21:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:21:06,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:06,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2149943] [2021-10-28 09:21:06,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2149943] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:06,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662818453] [2021-10-28 09:21:06,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:21:06,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:06,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:21:06,075 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:21:06,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 09:21:06,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:21:06,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:21:06,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 09:21:06,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:21:06,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-28 09:21:06,453 INFO L354 Elim1Store]: treesize reduction 46, result has 23.3 percent of original size [2021-10-28 09:21:06,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-10-28 09:21:06,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-10-28 09:21:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:21:06,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662818453] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:06,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:21:06,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-10-28 09:21:06,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036763812] [2021-10-28 09:21:06,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:21:06,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:06,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:21:06,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:21:06,655 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:06,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:06,936 INFO L93 Difference]: Finished difference Result 159 states and 205 transitions. [2021-10-28 09:21:06,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:21:06,937 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-28 09:21:06,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:06,941 INFO L225 Difference]: With dead ends: 159 [2021-10-28 09:21:06,941 INFO L226 Difference]: Without dead ends: 157 [2021-10-28 09:21:06,942 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:21:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-10-28 09:21:06,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 106. [2021-10-28 09:21:06,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.3428571428571427) internal successors, (141), 105 states have internal predecessors, (141), 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) [2021-10-28 09:21:06,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2021-10-28 09:21:06,966 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 141 transitions. Word has length 25 [2021-10-28 09:21:06,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:06,966 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 141 transitions. [2021-10-28 09:21:06,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:06,966 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 141 transitions. [2021-10-28 09:21:06,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 09:21:06,968 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:06,968 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:07,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:21:07,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-28 09:21:07,169 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:21:07,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:07,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1096380170, now seen corresponding path program 2 times [2021-10-28 09:21:07,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:07,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166383832] [2021-10-28 09:21:07,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:07,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:21:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:21:07,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:07,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166383832] [2021-10-28 09:21:07,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166383832] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:07,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829546881] [2021-10-28 09:21:07,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:21:07,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:07,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:21:07,252 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:21:07,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 09:21:07,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:21:07,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:21:07,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:21:07,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:21:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:21:07,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829546881] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:07,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:21:07,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-10-28 09:21:07,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124554393] [2021-10-28 09:21:07,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:21:07,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:07,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:21:07,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:21:07,651 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:07,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:07,952 INFO L93 Difference]: Finished difference Result 216 states and 272 transitions. [2021-10-28 09:21:07,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:21:07,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-28 09:21:07,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:07,956 INFO L225 Difference]: With dead ends: 216 [2021-10-28 09:21:07,956 INFO L226 Difference]: Without dead ends: 203 [2021-10-28 09:21:07,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-10-28 09:21:07,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-10-28 09:21:07,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 148. [2021-10-28 09:21:07,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.3333333333333333) internal successors, (196), 147 states have internal predecessors, (196), 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) [2021-10-28 09:21:07,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 196 transitions. [2021-10-28 09:21:07,986 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 196 transitions. Word has length 28 [2021-10-28 09:21:07,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:07,986 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 196 transitions. [2021-10-28 09:21:07,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:07,987 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 196 transitions. [2021-10-28 09:21:07,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 09:21:07,988 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:07,989 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:08,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:21:08,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:08,205 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:21:08,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:08,205 INFO L85 PathProgramCache]: Analyzing trace with hash 160714710, now seen corresponding path program 2 times [2021-10-28 09:21:08,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:08,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673988161] [2021-10-28 09:21:08,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:08,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:21:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 09:21:08,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:08,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673988161] [2021-10-28 09:21:08,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673988161] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:08,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022185132] [2021-10-28 09:21:08,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:21:08,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:08,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:21:08,280 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:21:08,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 09:21:08,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:21:08,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:21:08,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:21:08,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:21:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 09:21:08,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022185132] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:21:08,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:21:08,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-10-28 09:21:08,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016315204] [2021-10-28 09:21:08,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:21:08,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:08,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:21:08,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:21:08,649 INFO L87 Difference]: Start difference. First operand 148 states and 196 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:08,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:08,729 INFO L93 Difference]: Finished difference Result 246 states and 322 transitions. [2021-10-28 09:21:08,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:21:08,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-28 09:21:08,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:08,732 INFO L225 Difference]: With dead ends: 246 [2021-10-28 09:21:08,732 INFO L226 Difference]: Without dead ends: 129 [2021-10-28 09:21:08,733 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:21:08,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-28 09:21:08,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 114. [2021-10-28 09:21:08,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.2831858407079646) internal successors, (145), 113 states have internal predecessors, (145), 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) [2021-10-28 09:21:08,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 145 transitions. [2021-10-28 09:21:08,749 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 145 transitions. Word has length 29 [2021-10-28 09:21:08,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:08,750 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 145 transitions. [2021-10-28 09:21:08,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:08,750 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 145 transitions. [2021-10-28 09:21:08,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 09:21:08,752 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:08,752 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:08,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:21:08,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:08,969 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:21:08,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:08,970 INFO L85 PathProgramCache]: Analyzing trace with hash 583416536, now seen corresponding path program 1 times [2021-10-28 09:21:08,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:08,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258137702] [2021-10-28 09:21:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:08,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:21:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:21:09,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:09,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258137702] [2021-10-28 09:21:09,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258137702] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:09,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651497946] [2021-10-28 09:21:09,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:09,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:09,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:21:09,160 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:21:09,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 09:21:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:21:09,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 09:21:09,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:21:09,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-28 09:21:09,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-10-28 09:21:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:21:09,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651497946] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:09,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:21:09,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-28 09:21:09,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020717786] [2021-10-28 09:21:09,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 09:21:09,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:09,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 09:21:09,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:21:09,727 INFO L87 Difference]: Start difference. First operand 114 states and 145 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 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) [2021-10-28 09:21:10,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:10,260 INFO L93 Difference]: Finished difference Result 183 states and 226 transitions. [2021-10-28 09:21:10,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 09:21:10,261 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 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 29 [2021-10-28 09:21:10,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:10,263 INFO L225 Difference]: With dead ends: 183 [2021-10-28 09:21:10,263 INFO L226 Difference]: Without dead ends: 181 [2021-10-28 09:21:10,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2021-10-28 09:21:10,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-10-28 09:21:10,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2021-10-28 09:21:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.2735042735042734) internal successors, (149), 117 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2021-10-28 09:21:10,284 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 29 [2021-10-28 09:21:10,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:10,285 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2021-10-28 09:21:10,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 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) [2021-10-28 09:21:10,285 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2021-10-28 09:21:10,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 09:21:10,286 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:10,287 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:10,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:21:10,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:10,512 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:21:10,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:10,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1240772930, now seen corresponding path program 3 times [2021-10-28 09:21:10,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:10,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956948511] [2021-10-28 09:21:10,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:10,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:21:11,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:21:11,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:11,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956948511] [2021-10-28 09:21:11,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956948511] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:11,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554195589] [2021-10-28 09:21:11,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:21:11,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:11,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:21:11,768 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:21:11,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 09:21:12,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 09:21:12,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:21:12,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 09:21:12,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:21:12,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-10-28 09:21:12,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:12,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:12,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:12,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-10-28 09:21:12,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:12,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:12,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:12,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:12,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 09:21:12,688 INFO L354 Elim1Store]: treesize reduction 203, result has 15.1 percent of original size [2021-10-28 09:21:12,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 59 treesize of output 62 [2021-10-28 09:21:13,153 INFO L354 Elim1Store]: treesize reduction 224, result has 15.2 percent of original size [2021-10-28 09:21:13,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 74 [2021-10-28 09:21:14,628 INFO L354 Elim1Store]: treesize reduction 121, result has 3.2 percent of original size [2021-10-28 09:21:14,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 54 [2021-10-28 09:21:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:21:14,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554195589] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:14,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:21:14,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2021-10-28 09:21:14,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9895818] [2021-10-28 09:21:14,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 09:21:14,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:14,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 09:21:14,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-10-28 09:21:14,680 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 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) [2021-10-28 09:21:16,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:16,409 INFO L93 Difference]: Finished difference Result 170 states and 209 transitions. [2021-10-28 09:21:16,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 09:21:16,409 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-28 09:21:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:16,411 INFO L225 Difference]: With dead ends: 170 [2021-10-28 09:21:16,411 INFO L226 Difference]: Without dead ends: 138 [2021-10-28 09:21:16,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=358, Invalid=1364, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 09:21:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-28 09:21:16,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 121. [2021-10-28 09:21:16,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.275) internal successors, (153), 120 states have internal predecessors, (153), 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) [2021-10-28 09:21:16,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2021-10-28 09:21:16,432 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 31 [2021-10-28 09:21:16,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:16,433 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2021-10-28 09:21:16,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 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) [2021-10-28 09:21:16,433 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2021-10-28 09:21:16,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 09:21:16,434 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:16,434 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:16,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:21:16,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:16,661 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:21:16,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:16,661 INFO L85 PathProgramCache]: Analyzing trace with hash -956621735, now seen corresponding path program 1 times [2021-10-28 09:21:16,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:16,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362244529] [2021-10-28 09:21:16,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:16,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:21:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:21:16,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:16,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362244529] [2021-10-28 09:21:16,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362244529] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:21:16,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:21:16,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:21:16,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584279762] [2021-10-28 09:21:16,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:21:16,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:16,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:21:16,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:21:16,737 INFO L87 Difference]: Start difference. First operand 121 states and 153 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:16,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:16,784 INFO L93 Difference]: Finished difference Result 197 states and 246 transitions. [2021-10-28 09:21:16,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:21:16,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-28 09:21:16,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:16,788 INFO L225 Difference]: With dead ends: 197 [2021-10-28 09:21:16,788 INFO L226 Difference]: Without dead ends: 141 [2021-10-28 09:21:16,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:21:16,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-28 09:21:16,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2021-10-28 09:21:16,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.2666666666666666) internal successors, (152), 120 states have internal predecessors, (152), 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) [2021-10-28 09:21:16,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 152 transitions. [2021-10-28 09:21:16,810 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 152 transitions. Word has length 31 [2021-10-28 09:21:16,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:16,810 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 152 transitions. [2021-10-28 09:21:16,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:16,811 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 152 transitions. [2021-10-28 09:21:16,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 09:21:16,812 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:16,812 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:16,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 09:21:16,813 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:21:16,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:16,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1777758610, now seen corresponding path program 2 times [2021-10-28 09:21:16,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:16,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127346755] [2021-10-28 09:21:16,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:16,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:21:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:21:16,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:16,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127346755] [2021-10-28 09:21:16,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127346755] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:16,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859739478] [2021-10-28 09:21:16,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:21:16,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:16,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:21:16,925 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:21:16,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 09:21:17,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:21:17,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:21:17,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 09:21:17,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:21:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:21:17,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859739478] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:17,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:21:17,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-10-28 09:21:17,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015315714] [2021-10-28 09:21:17,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:21:17,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:17,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:21:17,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:21:17,520 INFO L87 Difference]: Start difference. First operand 121 states and 152 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:17,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:17,869 INFO L93 Difference]: Finished difference Result 403 states and 505 transitions. [2021-10-28 09:21:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 09:21:17,870 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-28 09:21:17,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:17,873 INFO L225 Difference]: With dead ends: 403 [2021-10-28 09:21:17,873 INFO L226 Difference]: Without dead ends: 298 [2021-10-28 09:21:17,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:21:17,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-10-28 09:21:17,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 204. [2021-10-28 09:21:17,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.2857142857142858) internal successors, (261), 203 states have internal predecessors, (261), 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) [2021-10-28 09:21:17,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 261 transitions. [2021-10-28 09:21:17,907 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 261 transitions. Word has length 33 [2021-10-28 09:21:17,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:17,907 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 261 transitions. [2021-10-28 09:21:17,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:17,908 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 261 transitions. [2021-10-28 09:21:17,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 09:21:17,909 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:17,909 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:17,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:21:18,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 09:21:18,129 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:21:18,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:18,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1071791489, now seen corresponding path program 4 times [2021-10-28 09:21:18,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:18,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938417750] [2021-10-28 09:21:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:18,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:21:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:21:18,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:18,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938417750] [2021-10-28 09:21:18,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938417750] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:18,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968115640] [2021-10-28 09:21:18,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:21:18,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:18,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:21:18,249 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:21:18,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 09:21:18,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:21:18,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:21:18,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 09:21:18,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:21:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:21:18,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968115640] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:18,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:21:18,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-10-28 09:21:18,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120978528] [2021-10-28 09:21:18,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:21:18,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:18,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:21:18,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:21:18,763 INFO L87 Difference]: Start difference. First operand 204 states and 261 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-10-28 09:21:19,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:19,136 INFO L93 Difference]: Finished difference Result 487 states and 611 transitions. [2021-10-28 09:21:19,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 09:21:19,139 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) Word has length 34 [2021-10-28 09:21:19,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:19,143 INFO L225 Difference]: With dead ends: 487 [2021-10-28 09:21:19,144 INFO L226 Difference]: Without dead ends: 465 [2021-10-28 09:21:19,145 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:21:19,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-10-28 09:21:19,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 289. [2021-10-28 09:21:19,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.3159722222222223) internal successors, (379), 288 states have internal predecessors, (379), 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) [2021-10-28 09:21:19,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 379 transitions. [2021-10-28 09:21:19,188 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 379 transitions. Word has length 34 [2021-10-28 09:21:19,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:19,189 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 379 transitions. [2021-10-28 09:21:19,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-10-28 09:21:19,189 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 379 transitions. [2021-10-28 09:21:19,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 09:21:19,191 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:19,191 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:19,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:21:19,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 09:21:19,405 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:21:19,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:19,405 INFO L85 PathProgramCache]: Analyzing trace with hash -715108188, now seen corresponding path program 2 times [2021-10-28 09:21:19,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:19,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171200362] [2021-10-28 09:21:19,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:19,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:21:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:21:20,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:20,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171200362] [2021-10-28 09:21:20,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171200362] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:20,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467746671] [2021-10-28 09:21:20,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:21:20,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:20,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:21:20,333 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:21:20,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 09:21:20,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:21:20,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:21:20,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 09:21:20,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:21:20,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-10-28 09:21:20,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-28 09:21:20,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:20,947 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 09:21:20,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-10-28 09:21:21,137 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-28 09:21:21,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 35 [2021-10-28 09:21:21,384 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-10-28 09:21:21,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 40 [2021-10-28 09:21:21,748 INFO L354 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2021-10-28 09:21:21,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 42 [2021-10-28 09:21:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:21:21,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467746671] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:21,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:21:21,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-10-28 09:21:21,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485489269] [2021-10-28 09:21:21,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 09:21:21,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:21,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 09:21:21,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-10-28 09:21:21,786 INFO L87 Difference]: Start difference. First operand 289 states and 379 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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) [2021-10-28 09:21:25,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:25,420 INFO L93 Difference]: Finished difference Result 808 states and 1021 transitions. [2021-10-28 09:21:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-28 09:21:25,421 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-28 09:21:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:25,428 INFO L225 Difference]: With dead ends: 808 [2021-10-28 09:21:25,428 INFO L226 Difference]: Without dead ends: 806 [2021-10-28 09:21:25,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=957, Invalid=4593, Unknown=0, NotChecked=0, Total=5550 [2021-10-28 09:21:25,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-10-28 09:21:25,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 469. [2021-10-28 09:21:25,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.3461538461538463) internal successors, (630), 468 states have internal predecessors, (630), 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) [2021-10-28 09:21:25,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 630 transitions. [2021-10-28 09:21:25,528 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 630 transitions. Word has length 34 [2021-10-28 09:21:25,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:25,529 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 630 transitions. [2021-10-28 09:21:25,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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) [2021-10-28 09:21:25,529 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 630 transitions. [2021-10-28 09:21:25,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 09:21:25,531 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:25,531 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:25,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 09:21:25,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 09:21:25,757 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:21:25,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:25,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1136182421, now seen corresponding path program 5 times [2021-10-28 09:21:25,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:25,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915127170] [2021-10-28 09:21:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:25,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:21:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:21:27,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:27,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915127170] [2021-10-28 09:21:27,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915127170] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:27,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825684818] [2021-10-28 09:21:27,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:21:27,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:27,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:21:27,870 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:21:27,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 09:21:28,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-28 09:21:28,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:21:28,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-28 09:21:28,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:21:28,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-10-28 09:21:28,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:28,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:28,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:28,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:28,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:28,838 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 09:21:28,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 66 [2021-10-28 09:21:29,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:29,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:29,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:29,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:29,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 09:21:29,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:29,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:29,517 INFO L354 Elim1Store]: treesize reduction 199, result has 19.1 percent of original size [2021-10-28 09:21:29,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 74 treesize of output 90 [2021-10-28 09:21:29,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:29,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:29,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:29,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 09:21:29,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:29,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 09:21:29,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:29,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:30,066 INFO L354 Elim1Store]: treesize reduction 355, result has 13.4 percent of original size [2021-10-28 09:21:30,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 104 treesize of output 110 [2021-10-28 09:21:30,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:30,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:30,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:30,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:30,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:21:30,739 INFO L354 Elim1Store]: treesize reduction 336, result has 14.7 percent of original size [2021-10-28 09:21:30,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 32 case distinctions, treesize of input 111 treesize of output 121 [2021-10-28 09:21:35,142 INFO L354 Elim1Store]: treesize reduction 128, result has 9.2 percent of original size [2021-10-28 09:21:35,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 108 treesize of output 74 [2021-10-28 09:21:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 09:21:35,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825684818] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:35,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:21:35,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 37 [2021-10-28 09:21:35,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482673375] [2021-10-28 09:21:35,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-28 09:21:35,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:35,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-28 09:21:35,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 09:21:35,206 INFO L87 Difference]: Start difference. First operand 469 states and 630 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 states have internal predecessors, (65), 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) [2021-10-28 09:22:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:08,337 INFO L93 Difference]: Finished difference Result 1738 states and 2258 transitions. [2021-10-28 09:22:08,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-10-28 09:22:08,337 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 states have internal predecessors, (65), 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 37 [2021-10-28 09:22:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:08,349 INFO L225 Difference]: With dead ends: 1738 [2021-10-28 09:22:08,349 INFO L226 Difference]: Without dead ends: 1576 [2021-10-28 09:22:08,367 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12161 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=4108, Invalid=29564, Unknown=0, NotChecked=0, Total=33672 [2021-10-28 09:22:08,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-10-28 09:22:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 393. [2021-10-28 09:22:08,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.3265306122448979) internal successors, (520), 392 states have internal predecessors, (520), 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) [2021-10-28 09:22:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 520 transitions. [2021-10-28 09:22:08,486 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 520 transitions. Word has length 37 [2021-10-28 09:22:08,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:08,486 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 520 transitions. [2021-10-28 09:22:08,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 states have internal predecessors, (65), 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) [2021-10-28 09:22:08,487 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 520 transitions. [2021-10-28 09:22:08,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 09:22:08,488 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:08,488 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:08,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-28 09:22:08,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 09:22:08,689 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:22:08,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:08,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1630806470, now seen corresponding path program 1 times [2021-10-28 09:22:08,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:08,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3954608] [2021-10-28 09:22:08,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:08,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:10,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 09:22:10,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:10,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3954608] [2021-10-28 09:22:10,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3954608] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:10,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909697858] [2021-10-28 09:22:10,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:10,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:10,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:10,797 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:22:10,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 09:22:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:11,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 09:22:11,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:22:11,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-10-28 09:22:11,600 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-28 09:22:11,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 42 [2021-10-28 09:22:11,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:22:11,839 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-28 09:22:11,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 50 [2021-10-28 09:22:12,272 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-28 09:22:12,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 55 [2021-10-28 09:22:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 09:22:12,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909697858] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:12,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:22:12,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-10-28 09:22:12,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785001985] [2021-10-28 09:22:12,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 09:22:12,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:12,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 09:22:12,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:22:12,794 INFO L87 Difference]: Start difference. First operand 393 states and 520 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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) [2021-10-28 09:22:14,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:14,777 INFO L93 Difference]: Finished difference Result 549 states and 706 transitions. [2021-10-28 09:22:14,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 09:22:14,778 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-28 09:22:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:14,781 INFO L225 Difference]: With dead ends: 549 [2021-10-28 09:22:14,782 INFO L226 Difference]: Without dead ends: 486 [2021-10-28 09:22:14,783 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 09:22:14,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-10-28 09:22:14,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 407. [2021-10-28 09:22:14,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.3226600985221675) internal successors, (537), 406 states have internal predecessors, (537), 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) [2021-10-28 09:22:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 537 transitions. [2021-10-28 09:22:14,896 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 537 transitions. Word has length 38 [2021-10-28 09:22:14,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:14,896 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 537 transitions. [2021-10-28 09:22:14,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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) [2021-10-28 09:22:14,897 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 537 transitions. [2021-10-28 09:22:14,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 09:22:14,898 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:14,899 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:14,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-28 09:22:15,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 09:22:15,121 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:22:15,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:15,121 INFO L85 PathProgramCache]: Analyzing trace with hash 670016120, now seen corresponding path program 1 times [2021-10-28 09:22:15,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:15,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344444143] [2021-10-28 09:22:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:15,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:22:15,213 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:22:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:22:15,318 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:22:15,318 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 09:22:15,320 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:22:15,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-28 09:22:15,331 INFO L731 BasicCegarLoop]: Path program histogram: [5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:15,337 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:22:15,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:22:15 BoogieIcfgContainer [2021-10-28 09:22:15,447 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:22:15,448 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:22:15,448 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:22:15,449 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:22:15,449 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:20:54" (3/4) ... [2021-10-28 09:22:15,453 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 09:22:15,529 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:22:15,536 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:22:15,537 INFO L168 Benchmark]: Toolchain (without parser) took 81604.54 ms. Allocated memory was 140.5 MB in the beginning and 297.8 MB in the end (delta: 157.3 MB). Free memory was 108.0 MB in the beginning and 216.8 MB in the end (delta: -108.8 MB). Peak memory consumption was 49.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:22:15,538 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 90.2 MB. Free memory is still 44.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:22:15,539 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.43 ms. Allocated memory is still 140.5 MB. Free memory was 108.0 MB in the beginning and 115.2 MB in the end (delta: -7.2 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:22:15,541 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.93 ms. Allocated memory is still 140.5 MB. Free memory was 115.2 MB in the beginning and 112.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:22:15,542 INFO L168 Benchmark]: Boogie Preprocessor took 41.75 ms. Allocated memory is still 140.5 MB. Free memory was 112.9 MB in the beginning and 111.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:22:15,543 INFO L168 Benchmark]: RCFGBuilder took 548.89 ms. Allocated memory is still 140.5 MB. Free memory was 111.4 MB in the beginning and 96.3 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-28 09:22:15,546 INFO L168 Benchmark]: TraceAbstraction took 80455.75 ms. Allocated memory was 140.5 MB in the beginning and 297.8 MB in the end (delta: 157.3 MB). Free memory was 96.1 MB in the beginning and 220.9 MB in the end (delta: -124.9 MB). Peak memory consumption was 33.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:22:15,547 INFO L168 Benchmark]: Witness Printer took 87.95 ms. Allocated memory is still 297.8 MB. Free memory was 220.9 MB in the beginning and 216.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:22:15,550 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 90.2 MB. Free memory is still 44.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 379.43 ms. Allocated memory is still 140.5 MB. Free memory was 108.0 MB in the beginning and 115.2 MB in the end (delta: -7.2 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 65.93 ms. Allocated memory is still 140.5 MB. Free memory was 115.2 MB in the beginning and 112.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.75 ms. Allocated memory is still 140.5 MB. Free memory was 112.9 MB in the beginning and 111.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 548.89 ms. Allocated memory is still 140.5 MB. Free memory was 111.4 MB in the beginning and 96.3 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 80455.75 ms. Allocated memory was 140.5 MB in the beginning and 297.8 MB in the end (delta: 157.3 MB). Free memory was 96.1 MB in the beginning and 220.9 MB in the end (delta: -124.9 MB). Peak memory consumption was 33.4 MB. Max. memory is 16.1 GB. * Witness Printer took 87.95 ms. Allocated memory is still 297.8 MB. Free memory was 220.9 MB in the beginning and 216.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int INFINITY = 899; VAL [INFINITY=899] [L18] int nodecount = __VERIFIER_nondet_int(); [L19] int edgecount = __VERIFIER_nondet_int(); [L20] COND FALSE !(!(0 <= nodecount && nodecount <= 4)) VAL [INFINITY=899] [L21] COND FALSE !(!(0 <= edgecount && edgecount <= 19)) [L22] int source = 0; [L23] int Source[20] = {0,4,1,1,0,0,1,3,4,4,2,2,3,0,0,3,1,2,2,3}; [L24] int Dest[20] = {1,3,4,1,1,4,3,4,3,0,0,0,0,2,3,0,2,1,0,4}; [L25] int Weight[20] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19}; [L26] int distance[5]; [L27] int x,y; [L28] int i,j; [L30] i = 0 VAL [INFINITY=899] [L30] COND TRUE i < nodecount VAL [INFINITY=899] [L31] COND TRUE i == source [L32] distance[i] = 0 VAL [INFINITY=899] [L30] i++ VAL [INFINITY=899] [L30] COND TRUE i < nodecount VAL [INFINITY=899] [L31] COND FALSE !(i == source) [L35] distance[i] = INFINITY VAL [INFINITY=899] [L30] i++ VAL [INFINITY=899] [L30] COND FALSE !(i < nodecount) VAL [INFINITY=899] [L39] i = 0 VAL [INFINITY=899] [L39] COND TRUE i < nodecount [L41] j = 0 VAL [INFINITY=899] [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] VAL [INFINITY=899] [L45] COND TRUE distance[x] > distance[y] + Weight[j] [L47] distance[x] = -1 VAL [INFINITY=899] [L41] j++ VAL [INFINITY=899] [L41] COND FALSE !(j < edgecount) VAL [INFINITY=899] [L39] i++ VAL [INFINITY=899] [L39] COND TRUE i < nodecount [L41] j = 0 VAL [INFINITY=899] [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] VAL [INFINITY=899] [L45] COND FALSE !(distance[x] > distance[y] + Weight[j]) [L41] j++ VAL [INFINITY=899] [L41] COND FALSE !(j < edgecount) VAL [INFINITY=899] [L39] i++ VAL [INFINITY=899] [L39] COND FALSE !(i < nodecount) VAL [INFINITY=899] [L51] i = 0 VAL [INFINITY=899] [L51] COND TRUE i < edgecount [L53] EXPR Dest[i] [L53] x = Dest[i] [L54] EXPR Source[i] [L54] y = Source[i] [L55] EXPR distance[x] [L55] EXPR distance[y] [L55] EXPR Weight[i] VAL [INFINITY=899] [L55] COND FALSE !(distance[x] > distance[y] + Weight[i]) [L51] i++ VAL [INFINITY=899] [L51] COND FALSE !(i < edgecount) VAL [INFINITY=899] [L61] i = 0 VAL [INFINITY=899] [L61] COND TRUE i < nodecount [L63] distance[i] [L11] COND FALSE !(!(cond)) VAL [INFINITY=899] [L61] i++ VAL [INFINITY=899] [L61] COND TRUE i < nodecount [L63] distance[i] [L11] COND TRUE !(cond) VAL [INFINITY=899] [L12] reach_error() VAL [INFINITY=899] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 80.2s, OverallIterations: 19, TraceHistogramMax: 3, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 46.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 618 SDtfs, 3836 SDslu, 3007 SDs, 0 SdLazy, 4732 SolverSat, 1901 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 8.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 899 GetRequests, 367 SyntacticMatches, 16 SemanticMatches, 516 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15562 ImplicationChecksByTransitivity, 42.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=469occurred in iteration=16, InterpolantAutomatonStates: 414, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 18 MinimizatonAttempts, 2434 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 23.3s InterpolantComputationTime, 959 NumberOfCodeBlocks, 956 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 888 ConstructedInterpolants, 73 QuantifiedInterpolants, 13564 SizeOfPredicates, 124 NumberOfNonLiveVariables, 3731 ConjunctsInSsa, 245 ConjunctsInUnsatCore, 33 InterpolantComputations, 4 PerfectInterpolantSequences, 156/363 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 09:22:15,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732c6c37-7f56-4423-8ab2-ffb7b562e293/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...