./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_10x0-1.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_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/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_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_10x0-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/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_38b5f8de-d2ac-40f4-9156-c8d3220a5add/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 68d0cd7d514b491e1404560081afc21267eb1b3dae98cdb9832a8634357d65e4 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:24:02,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:24:02,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:24:02,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:24:02,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:24:02,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:24:02,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:24:02,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:24:02,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:24:02,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:24:02,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:24:02,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:24:02,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:24:02,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:24:02,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:24:02,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:24:02,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:24:02,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:24:02,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:24:02,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:24:02,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:24:02,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:24:02,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:24:02,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:24:02,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:24:02,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:24:02,725 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:24:02,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:24:02,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:24:02,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:24:02,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:24:02,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:24:02,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:24:02,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:24:02,736 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:24:02,736 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:24:02,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:24:02,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:24:02,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:24:02,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:24:02,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:24:02,740 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 09:24:02,787 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:24:02,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:24:02,788 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:24:02,789 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:24:02,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:24:02,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:24:02,791 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:24:02,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:24:02,792 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:24:02,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:24:02,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:24:02,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:24:02,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 09:24:02,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:24:02,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 09:24:02,794 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:24:02,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:24:02,795 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:24:02,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 09:24:02,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:24:02,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:24:02,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:24:02,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:24:02,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:24:02,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:24:02,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 09:24:02,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:24:02,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:24:02,798 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 09:24:02,798 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 09:24:02,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 09:24:02,799 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:24:02,799 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_38b5f8de-d2ac-40f4-9156-c8d3220a5add/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68d0cd7d514b491e1404560081afc21267eb1b3dae98cdb9832a8634357d65e4 [2021-10-28 09:24:03,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:24:03,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:24:03,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:24:03,155 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:24:03,155 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:24:03,156 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/recursive-simple/sum_10x0-1.c [2021-10-28 09:24:03,234 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/data/1db2d77f7/2d9e98740acf4f658f5da20281d2f5c3/FLAGe2c4d6263 [2021-10-28 09:24:03,756 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:24:03,757 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/sv-benchmarks/c/recursive-simple/sum_10x0-1.c [2021-10-28 09:24:03,769 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/data/1db2d77f7/2d9e98740acf4f658f5da20281d2f5c3/FLAGe2c4d6263 [2021-10-28 09:24:04,126 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/data/1db2d77f7/2d9e98740acf4f658f5da20281d2f5c3 [2021-10-28 09:24:04,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:24:04,133 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:24:04,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:24:04,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:24:04,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:24:04,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:24:04" (1/1) ... [2021-10-28 09:24:04,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cdf98ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:04, skipping insertion in model container [2021-10-28 09:24:04,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:24:04" (1/1) ... [2021-10-28 09:24:04,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:24:04,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:24:04,365 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_38b5f8de-d2ac-40f4-9156-c8d3220a5add/sv-benchmarks/c/recursive-simple/sum_10x0-1.c[481,494] [2021-10-28 09:24:04,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:24:04,382 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:24:04,403 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_38b5f8de-d2ac-40f4-9156-c8d3220a5add/sv-benchmarks/c/recursive-simple/sum_10x0-1.c[481,494] [2021-10-28 09:24:04,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:24:04,420 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:24:04,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:04 WrapperNode [2021-10-28 09:24:04,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:24:04,424 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:24:04,425 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:24:04,425 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:24:04,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:04" (1/1) ... [2021-10-28 09:24:04,442 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:04" (1/1) ... [2021-10-28 09:24:04,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:24:04,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:24:04,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:24:04,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:24:04,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:04" (1/1) ... [2021-10-28 09:24:04,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:04" (1/1) ... [2021-10-28 09:24:04,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:04" (1/1) ... [2021-10-28 09:24:04,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:04" (1/1) ... [2021-10-28 09:24:04,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:04" (1/1) ... [2021-10-28 09:24:04,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:04" (1/1) ... [2021-10-28 09:24:04,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:04" (1/1) ... [2021-10-28 09:24:04,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:24:04,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:24:04,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:24:04,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:24:04,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:04" (1/1) ... [2021-10-28 09:24:04,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:24:04,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:04,543 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:24:04,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:24:04,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:24:04,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:24:04,610 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-10-28 09:24:04,610 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-10-28 09:24:04,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:24:04,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:24:04,827 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:24:04,827 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 09:24:04,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:24:04 BoogieIcfgContainer [2021-10-28 09:24:04,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:24:04,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:24:04,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:24:04,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:24:04,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:24:04" (1/3) ... [2021-10-28 09:24:04,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a154c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:24:04, skipping insertion in model container [2021-10-28 09:24:04,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:04" (2/3) ... [2021-10-28 09:24:04,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a154c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:24:04, skipping insertion in model container [2021-10-28 09:24:04,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:24:04" (3/3) ... [2021-10-28 09:24:04,838 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2021-10-28 09:24:04,844 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:24:04,844 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 09:24:04,893 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:24:04,900 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 09:24:04,900 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 09:24:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:24:04,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 09:24:04,923 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:04,923 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:04,924 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:04,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:04,930 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-10-28 09:24:04,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:04,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396939165] [2021-10-28 09:24:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:04,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:05,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:05,245 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 09:24:05,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:05,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396939165] [2021-10-28 09:24:05,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396939165] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:05,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:05,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:24:05,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451321120] [2021-10-28 09:24:05,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:24:05,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:05,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:24:05,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:24:05,272 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:05,337 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-10-28 09:24:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:24:05,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 09:24:05,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:05,349 INFO L225 Difference]: With dead ends: 25 [2021-10-28 09:24:05,349 INFO L226 Difference]: Without dead ends: 15 [2021-10-28 09:24:05,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:24:05,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-28 09:24:05,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-28 09:24:05,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 09:24:05,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-28 09:24:05,400 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-10-28 09:24:05,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:05,400 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-28 09:24:05,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:05,401 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-28 09:24:05,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:24:05,403 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:05,403 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:05,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:24:05,404 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:05,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:05,406 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-10-28 09:24:05,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:05,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462339850] [2021-10-28 09:24:05,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:05,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:05,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:05,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:24:05,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:05,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462339850] [2021-10-28 09:24:05,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462339850] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:05,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103618308] [2021-10-28 09:24:05,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:05,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:05,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:05,590 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:05,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:24:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:05,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:24:05,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:24:05,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103618308] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:05,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:24:05,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-28 09:24:05,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855727091] [2021-10-28 09:24:05,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:24:05,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:05,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:24:05,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:24:05,795 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 09:24:05,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:05,844 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-10-28 09:24:05,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:24:05,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 16 [2021-10-28 09:24:05,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:05,846 INFO L225 Difference]: With dead ends: 22 [2021-10-28 09:24:05,846 INFO L226 Difference]: Without dead ends: 18 [2021-10-28 09:24:05,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:24:05,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-28 09:24:05,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-28 09:24:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 09:24:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-28 09:24:05,854 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-10-28 09:24:05,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:05,854 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-28 09:24:05,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 09:24:05,855 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-28 09:24:05,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 09:24:05,856 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:05,857 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:05,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:06,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:06,082 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:06,083 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-10-28 09:24:06,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:06,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304362727] [2021-10-28 09:24:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:06,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:06,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:06,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:06,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 09:24:06,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:06,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304362727] [2021-10-28 09:24:06,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304362727] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:06,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835022041] [2021-10-28 09:24:06,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:24:06,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:06,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:06,340 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:06,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:24:06,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:24:06,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:24:06,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 09:24:06,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 09:24:06,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835022041] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:06,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:24:06,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-28 09:24:06,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446869446] [2021-10-28 09:24:06,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:24:06,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:06,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:24:06,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:24:06,522 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 09:24:06,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:06,575 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-10-28 09:24:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:24:06,576 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 22 [2021-10-28 09:24:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:06,577 INFO L225 Difference]: With dead ends: 25 [2021-10-28 09:24:06,577 INFO L226 Difference]: Without dead ends: 21 [2021-10-28 09:24:06,578 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:24:06,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-28 09:24:06,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-28 09:24:06,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 09:24:06,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-10-28 09:24:06,584 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-10-28 09:24:06,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:06,585 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-28 09:24:06,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 09:24:06,585 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-10-28 09:24:06,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 09:24:06,587 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:06,587 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:06,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:06,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:06,801 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:06,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:06,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-10-28 09:24:06,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:06,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622111504] [2021-10-28 09:24:06,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:06,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:06,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:06,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:06,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:06,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 09:24:06,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:06,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622111504] [2021-10-28 09:24:06,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622111504] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:06,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417880408] [2021-10-28 09:24:06,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:24:06,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:06,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:06,963 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:06,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:24:07,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 09:24:07,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:24:07,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:24:07,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 09:24:07,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417880408] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:07,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:24:07,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-28 09:24:07,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864692134] [2021-10-28 09:24:07,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:24:07,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:07,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:24:07,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:24:07,194 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 09:24:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:07,278 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-28 09:24:07,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:24:07,279 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 28 [2021-10-28 09:24:07,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:07,280 INFO L225 Difference]: With dead ends: 28 [2021-10-28 09:24:07,281 INFO L226 Difference]: Without dead ends: 24 [2021-10-28 09:24:07,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:24:07,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-28 09:24:07,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-28 09:24:07,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 09:24:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-28 09:24:07,287 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-10-28 09:24:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:07,288 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-28 09:24:07,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 09:24:07,289 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-28 09:24:07,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 09:24:07,290 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:07,290 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:07,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:07,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:07,518 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:07,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:07,518 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-10-28 09:24:07,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:07,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545125281] [2021-10-28 09:24:07,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:07,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:07,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:07,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:07,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:07,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:07,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-28 09:24:07,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:07,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545125281] [2021-10-28 09:24:07,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545125281] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:07,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400262795] [2021-10-28 09:24:07,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:24:07,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:07,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:07,726 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:07,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:24:07,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:24:07,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:24:07,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:24:07,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-28 09:24:07,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400262795] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:07,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:24:07,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-28 09:24:07,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893627254] [2021-10-28 09:24:07,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:24:07,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:07,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:24:07,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:24:07,985 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-28 09:24:08,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:08,049 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-28 09:24:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:24:08,050 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 34 [2021-10-28 09:24:08,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:08,051 INFO L225 Difference]: With dead ends: 31 [2021-10-28 09:24:08,052 INFO L226 Difference]: Without dead ends: 27 [2021-10-28 09:24:08,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:24:08,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-28 09:24:08,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-28 09:24:08,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 09:24:08,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-28 09:24:08,068 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-10-28 09:24:08,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:08,068 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-28 09:24:08,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-28 09:24:08,069 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-28 09:24:08,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 09:24:08,073 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:08,073 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:08,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:08,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:08,290 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:08,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:08,290 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-10-28 09:24:08,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:08,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167288154] [2021-10-28 09:24:08,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:08,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:08,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:08,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:08,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:08,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:08,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:08,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-28 09:24:08,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:08,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167288154] [2021-10-28 09:24:08,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167288154] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:08,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360495887] [2021-10-28 09:24:08,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:24:08,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:08,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:08,509 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:08,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:24:08,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 09:24:08,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:24:08,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 09:24:08,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-28 09:24:08,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360495887] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:08,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:24:08,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-28 09:24:08,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941109539] [2021-10-28 09:24:08,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:24:08,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:08,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:24:08,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:24:08,768 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-10-28 09:24:08,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:08,852 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-10-28 09:24:08,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:24:08,853 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) Word has length 40 [2021-10-28 09:24:08,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:08,854 INFO L225 Difference]: With dead ends: 34 [2021-10-28 09:24:08,854 INFO L226 Difference]: Without dead ends: 30 [2021-10-28 09:24:08,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-10-28 09:24:08,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-28 09:24:08,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-28 09:24:08,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2021-10-28 09:24:08,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-28 09:24:08,866 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-10-28 09:24:08,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:08,868 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-28 09:24:08,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-10-28 09:24:08,869 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-28 09:24:08,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 09:24:08,873 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:08,873 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:08,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:09,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:09,098 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:09,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:09,098 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-10-28 09:24:09,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:09,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862007228] [2021-10-28 09:24:09,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:09,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:09,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:09,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:09,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:09,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:09,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:09,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:09,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-28 09:24:09,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:09,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862007228] [2021-10-28 09:24:09,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862007228] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:09,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095039822] [2021-10-28 09:24:09,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:24:09,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:09,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:09,350 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:09,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 09:24:09,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-28 09:24:09,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:24:09,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 09:24:09,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-28 09:24:09,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095039822] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:09,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:24:09,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-28 09:24:09,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606422756] [2021-10-28 09:24:09,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 09:24:09,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:09,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:24:09,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:24:09,651 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) [2021-10-28 09:24:09,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:09,740 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-10-28 09:24:09,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:24:09,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) Word has length 46 [2021-10-28 09:24:09,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:09,746 INFO L225 Difference]: With dead ends: 37 [2021-10-28 09:24:09,746 INFO L226 Difference]: Without dead ends: 33 [2021-10-28 09:24:09,747 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:24:09,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-28 09:24:09,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-28 09:24:09,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-10-28 09:24:09,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-10-28 09:24:09,760 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-10-28 09:24:09,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:09,760 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-10-28 09:24:09,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) [2021-10-28 09:24:09,761 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-10-28 09:24:09,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 09:24:09,769 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:09,770 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:09,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:09,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:09,986 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:09,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:09,986 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-10-28 09:24:09,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:09,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659904462] [2021-10-28 09:24:09,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:09,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:10,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:10,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:10,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:10,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:10,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:10,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:10,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:10,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-28 09:24:10,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:10,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659904462] [2021-10-28 09:24:10,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659904462] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:10,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291138191] [2021-10-28 09:24:10,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:24:10,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:10,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:10,234 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:10,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 09:24:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:10,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 09:24:10,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-28 09:24:10,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291138191] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:10,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:24:10,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-10-28 09:24:10,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058627915] [2021-10-28 09:24:10,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:24:10,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:10,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:24:10,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:24:10,550 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-10-28 09:24:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:10,643 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-10-28 09:24:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:24:10,643 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) Word has length 52 [2021-10-28 09:24:10,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:10,645 INFO L225 Difference]: With dead ends: 40 [2021-10-28 09:24:10,645 INFO L226 Difference]: Without dead ends: 36 [2021-10-28 09:24:10,645 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:24:10,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-28 09:24:10,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-28 09:24:10,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2021-10-28 09:24:10,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-10-28 09:24:10,651 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-10-28 09:24:10,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:10,651 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-10-28 09:24:10,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-10-28 09:24:10,652 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-10-28 09:24:10,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 09:24:10,659 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:10,659 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:10,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:10,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:10,886 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:10,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:10,886 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-10-28 09:24:10,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:10,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978269009] [2021-10-28 09:24:10,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:10,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:10,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:10,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:10,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:10,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:11,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:11,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:11,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:11,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:11,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:11,113 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-28 09:24:11,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:11,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978269009] [2021-10-28 09:24:11,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978269009] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:11,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934985287] [2021-10-28 09:24:11,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:24:11,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:11,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:11,118 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:11,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 09:24:11,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:24:11,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:24:11,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 09:24:11,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-28 09:24:11,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934985287] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:11,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:24:11,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-10-28 09:24:11,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918712657] [2021-10-28 09:24:11,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 09:24:11,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:11,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 09:24:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:24:11,514 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-10-28 09:24:11,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:11,632 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-10-28 09:24:11,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:24:11,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) Word has length 58 [2021-10-28 09:24:11,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:11,633 INFO L225 Difference]: With dead ends: 43 [2021-10-28 09:24:11,634 INFO L226 Difference]: Without dead ends: 39 [2021-10-28 09:24:11,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:24:11,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-28 09:24:11,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-10-28 09:24:11,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-10-28 09:24:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-10-28 09:24:11,640 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-10-28 09:24:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:11,640 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-10-28 09:24:11,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-10-28 09:24:11,641 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-10-28 09:24:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-28 09:24:11,642 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:11,642 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:11,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:11,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:11,870 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:11,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:11,870 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-10-28 09:24:11,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:11,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170983432] [2021-10-28 09:24:11,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:11,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:11,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:11,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:11,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:12,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:12,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:12,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:12,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:12,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:12,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:12,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-28 09:24:12,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:12,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170983432] [2021-10-28 09:24:12,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170983432] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:12,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916354402] [2021-10-28 09:24:12,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:24:12,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:12,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:12,182 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:12,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 09:24:12,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-28 09:24:12,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:24:12,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 09:24:12,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-28 09:24:12,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916354402] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:12,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:24:12,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-10-28 09:24:12,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106754957] [2021-10-28 09:24:12,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 09:24:12,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:12,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 09:24:12,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:24:12,577 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (19), 10 states have call predecessors, (19), 3 states have call successors, (19) [2021-10-28 09:24:12,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:12,688 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-10-28 09:24:12,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 09:24:12,688 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (19), 10 states have call predecessors, (19), 3 states have call successors, (19) Word has length 64 [2021-10-28 09:24:12,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:12,712 INFO L225 Difference]: With dead ends: 46 [2021-10-28 09:24:12,712 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 09:24:12,713 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2021-10-28 09:24:12,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 09:24:12,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-28 09:24:12,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2021-10-28 09:24:12,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-10-28 09:24:12,718 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-10-28 09:24:12,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:12,719 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-10-28 09:24:12,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (19), 10 states have call predecessors, (19), 3 states have call successors, (19) [2021-10-28 09:24:12,719 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-10-28 09:24:12,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-28 09:24:12,720 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:12,720 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:12,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:12,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 09:24:12,946 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:24:12,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:12,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-10-28 09:24:12,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:12,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764558783] [2021-10-28 09:24:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:12,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:13,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:13,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:13,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:13,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:13,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:13,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:13,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:13,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:13,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:13,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:13,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:24:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 144 proven. 20 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-10-28 09:24:13,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:13,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764558783] [2021-10-28 09:24:13,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764558783] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:13,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118585296] [2021-10-28 09:24:13,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:24:13,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:13,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:13,838 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:13,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 09:24:14,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:24:14,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:24:14,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 97 conjunts are in the unsatisfiable core [2021-10-28 09:24:14,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 19 proven. 155 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-10-28 09:24:15,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118585296] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:15,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:24:15,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 54 [2021-10-28 09:24:15,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768215058] [2021-10-28 09:24:15,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-10-28 09:24:15,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:15,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-10-28 09:24:15,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2657, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 09:24:15,455 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 54 states, 50 states have (on average 1.16) internal successors, (58), 32 states have internal predecessors, (58), 6 states have call successors, (6), 1 states have call predecessors, (6), 21 states have return successors, (22), 22 states have call predecessors, (22), 6 states have call successors, (22) [2021-10-28 09:24:17,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:17,190 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-10-28 09:24:17,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 09:24:17,190 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 50 states have (on average 1.16) internal successors, (58), 32 states have internal predecessors, (58), 6 states have call successors, (6), 1 states have call predecessors, (6), 21 states have return successors, (22), 22 states have call predecessors, (22), 6 states have call successors, (22) Word has length 70 [2021-10-28 09:24:17,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:17,192 INFO L225 Difference]: With dead ends: 45 [2021-10-28 09:24:17,192 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 09:24:17,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=535, Invalid=5785, Unknown=0, NotChecked=0, Total=6320 [2021-10-28 09:24:17,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 09:24:17,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 09:24:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 09:24:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:24:17,213 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 70 [2021-10-28 09:24:17,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:17,215 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:24:17,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 50 states have (on average 1.16) internal successors, (58), 32 states have internal predecessors, (58), 6 states have call successors, (6), 1 states have call predecessors, (6), 21 states have return successors, (22), 22 states have call predecessors, (22), 6 states have call successors, (22) [2021-10-28 09:24:17,216 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:24:17,216 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 09:24:17,218 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:24:17,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:17,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:17,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 09:24:17,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:24:17,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:24:17,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:24:17,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:24:17,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:24:17,461 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 09:24:17,462 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 09:24:17,462 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 09:24:17,462 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 09:24:17,462 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2021-10-28 09:24:17,463 INFO L857 garLoopResultBuilder]: For program point L18(line 18) no Hoare annotation was computed. [2021-10-28 09:24:17,463 INFO L857 garLoopResultBuilder]: For program point L17(lines 17 19) no Hoare annotation was computed. [2021-10-28 09:24:17,463 INFO L853 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (and (= ULTIMATE.start_main_~a~0 10) (= ULTIMATE.start_main_~b~0 0)) [2021-10-28 09:24:17,464 INFO L857 garLoopResultBuilder]: For program point L16-1(line 16) no Hoare annotation was computed. [2021-10-28 09:24:17,464 INFO L857 garLoopResultBuilder]: For program point L13(lines 13 20) no Hoare annotation was computed. [2021-10-28 09:24:17,464 INFO L857 garLoopResultBuilder]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2021-10-28 09:24:17,464 INFO L853 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|) (<= 1 sum_~n)) [2021-10-28 09:24:17,464 INFO L857 garLoopResultBuilder]: For program point L9-1(line 9) no Hoare annotation was computed. [2021-10-28 09:24:17,465 INFO L857 garLoopResultBuilder]: For program point L6(lines 6 10) no Hoare annotation was computed. [2021-10-28 09:24:17,465 INFO L857 garLoopResultBuilder]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2021-10-28 09:24:17,465 INFO L860 garLoopResultBuilder]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2021-10-28 09:24:17,469 INFO L731 BasicCegarLoop]: Path program histogram: [10, 1] [2021-10-28 09:24:17,471 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:24:17,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:24:17 BoogieIcfgContainer [2021-10-28 09:24:17,475 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:24:17,476 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:24:17,476 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:24:17,476 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:24:17,477 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:24:04" (3/4) ... [2021-10-28 09:24:17,480 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:24:17,489 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2021-10-28 09:24:17,493 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-28 09:24:17,493 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-28 09:24:17,494 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:24:17,494 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:24:17,527 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:24:17,527 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:24:17,529 INFO L168 Benchmark]: Toolchain (without parser) took 13394.50 ms. Allocated memory was 107.0 MB in the beginning and 188.7 MB in the end (delta: 81.8 MB). Free memory was 75.3 MB in the beginning and 139.7 MB in the end (delta: -64.4 MB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:17,529 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 107.0 MB. Free memory is still 62.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:24:17,530 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.56 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 75.0 MB in the beginning and 104.8 MB in the end (delta: -29.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:17,530 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.33 ms. Allocated memory is still 130.0 MB. Free memory was 104.8 MB in the beginning and 103.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:17,531 INFO L168 Benchmark]: Boogie Preprocessor took 31.73 ms. Allocated memory is still 130.0 MB. Free memory was 103.8 MB in the beginning and 102.8 MB in the end (delta: 981.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:24:17,531 INFO L168 Benchmark]: RCFGBuilder took 336.11 ms. Allocated memory is still 130.0 MB. Free memory was 102.8 MB in the beginning and 93.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:17,532 INFO L168 Benchmark]: TraceAbstraction took 12644.14 ms. Allocated memory was 130.0 MB in the beginning and 188.7 MB in the end (delta: 58.7 MB). Free memory was 92.8 MB in the beginning and 141.8 MB in the end (delta: -49.0 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:17,532 INFO L168 Benchmark]: Witness Printer took 51.45 ms. Allocated memory is still 188.7 MB. Free memory was 141.8 MB in the beginning and 139.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:17,535 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 107.0 MB. Free memory is still 62.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 286.56 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 75.0 MB in the beginning and 104.8 MB in the end (delta: -29.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.33 ms. Allocated memory is still 130.0 MB. Free memory was 104.8 MB in the beginning and 103.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.73 ms. Allocated memory is still 130.0 MB. Free memory was 103.8 MB in the beginning and 102.8 MB in the end (delta: 981.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 336.11 ms. Allocated memory is still 130.0 MB. Free memory was 102.8 MB in the beginning and 93.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12644.14 ms. Allocated memory was 130.0 MB in the beginning and 188.7 MB in the end (delta: 58.7 MB). Free memory was 92.8 MB in the beginning and 141.8 MB in the end (delta: -49.0 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. * Witness Printer took 51.45 ms. Allocated memory is still 188.7 MB. Free memory was 141.8 MB in the beginning and 139.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 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 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12.5s, OverallIterations: 11, TraceHistogramMax: 11, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 108 SDtfs, 206 SDslu, 717 SDs, 0 SdLazy, 1209 SolverSat, 95 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 745 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=10, InterpolantAutomatonStates: 125, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 870 NumberOfCodeBlocks, 864 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 849 ConstructedInterpolants, 0 QuantifiedInterpolants, 2763 SizeOfPredicates, 70 NumberOfNonLiveVariables, 1511 ConjunctsInSsa, 223 ConjunctsInUnsatCore, 21 InterpolantComputations, 1 PerfectInterpolantSequences, 1345/2420 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 09:24:17,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b5f8de-d2ac-40f4-9156-c8d3220a5add/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...