./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gr2006.i --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_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/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_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/gr2006.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/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_0a375f60-77bf-49f1-8721-520631a5feb3/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 3ef045eb54c58e8ecfe4972142a43378e1f3b08091dc3d5b7e399cf5703f1724 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 08:50:42,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:50:42,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:50:42,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:50:42,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:50:42,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:50:42,692 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:50:42,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:50:42,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:50:42,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:50:42,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:50:42,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:50:42,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:50:42,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:50:42,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:50:42,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:50:42,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:50:42,712 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:50:42,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:50:42,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:50:42,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:50:42,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:50:42,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:50:42,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:50:42,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:50:42,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:50:42,739 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:50:42,740 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:50:42,741 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:50:42,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:50:42,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:50:42,744 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:50:42,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:50:42,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:50:42,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:50:42,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:50:42,760 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:50:42,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:50:42,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:50:42,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:50:42,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:50:42,764 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 08:50:42,809 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:50:42,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:50:42,810 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:50:42,810 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:50:42,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:50:42,812 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:50:42,812 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:50:42,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:50:42,813 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:50:42,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:50:42,813 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:50:42,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:50:42,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 08:50:42,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:50:42,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 08:50:42,815 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:50:42,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 08:50:42,815 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:50:42,815 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 08:50:42,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:50:42,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:50:42,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:50:42,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:50:42,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:50:42,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:50:42,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 08:50:42,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:50:42,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:50:42,818 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 08:50:42,818 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 08:50:42,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 08:50:42,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:50:42,819 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_0a375f60-77bf-49f1-8721-520631a5feb3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ef045eb54c58e8ecfe4972142a43378e1f3b08091dc3d5b7e399cf5703f1724 [2021-10-28 08:50:43,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:50:43,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:50:43,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:50:43,156 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:50:43,156 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:50:43,158 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/loop-lit/gr2006.i [2021-10-28 08:50:43,248 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/data/1ede71bdc/c960b91c64ac4b79844b3833ff5f0f9c/FLAGb87efa27d [2021-10-28 08:50:43,694 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:50:43,694 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/sv-benchmarks/c/loop-lit/gr2006.i [2021-10-28 08:50:43,701 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/data/1ede71bdc/c960b91c64ac4b79844b3833ff5f0f9c/FLAGb87efa27d [2021-10-28 08:50:44,116 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/data/1ede71bdc/c960b91c64ac4b79844b3833ff5f0f9c [2021-10-28 08:50:44,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:50:44,120 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 08:50:44,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:50:44,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:50:44,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:50:44,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:50:44" (1/1) ... [2021-10-28 08:50:44,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c664bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:44, skipping insertion in model container [2021-10-28 08:50:44,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:50:44" (1/1) ... [2021-10-28 08:50:44,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:50:44,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:50:44,399 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_0a375f60-77bf-49f1-8721-520631a5feb3/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2021-10-28 08:50:44,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:50:44,421 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:50:44,437 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_0a375f60-77bf-49f1-8721-520631a5feb3/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2021-10-28 08:50:44,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:50:44,457 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:50:44,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:44 WrapperNode [2021-10-28 08:50:44,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:50:44,460 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 08:50:44,460 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 08:50:44,460 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 08:50:44,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:44" (1/1) ... [2021-10-28 08:50:44,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:44" (1/1) ... [2021-10-28 08:50:44,495 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 08:50:44,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:50:44,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:50:44,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:50:44,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:44" (1/1) ... [2021-10-28 08:50:44,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:44" (1/1) ... [2021-10-28 08:50:44,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:44" (1/1) ... [2021-10-28 08:50:44,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:44" (1/1) ... [2021-10-28 08:50:44,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:44" (1/1) ... [2021-10-28 08:50:44,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:44" (1/1) ... [2021-10-28 08:50:44,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:44" (1/1) ... [2021-10-28 08:50:44,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:50:44,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:50:44,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:50:44,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:50:44,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:44" (1/1) ... [2021-10-28 08:50:44,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:50:44,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:50:44,567 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:50:44,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:50:44,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:50:44,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:50:44,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:50:44,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:50:44,815 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:50:44,815 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-28 08:50:44,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:50:44 BoogieIcfgContainer [2021-10-28 08:50:44,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:50:44,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:50:44,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:50:44,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:50:44,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:50:44" (1/3) ... [2021-10-28 08:50:44,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656a29df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:50:44, skipping insertion in model container [2021-10-28 08:50:44,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:44" (2/3) ... [2021-10-28 08:50:44,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656a29df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:50:44, skipping insertion in model container [2021-10-28 08:50:44,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:50:44" (3/3) ... [2021-10-28 08:50:44,827 INFO L111 eAbstractionObserver]: Analyzing ICFG gr2006.i [2021-10-28 08:50:44,856 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:50:44,856 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 08:50:44,934 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:50:44,942 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 08:50:44,942 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 08:50:44,956 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:44,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-28 08:50:44,960 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:44,960 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-28 08:50:44,960 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:44,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:44,965 INFO L85 PathProgramCache]: Analyzing trace with hash 890091623, now seen corresponding path program 1 times [2021-10-28 08:50:44,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:44,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560232077] [2021-10-28 08:50:44,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:44,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:45,119 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 08:50:45,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:45,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560232077] [2021-10-28 08:50:45,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560232077] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:50:45,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:50:45,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 08:50:45,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466156920] [2021-10-28 08:50:45,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 08:50:45,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:50:45,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 08:50:45,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 08:50:45,154 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:45,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:45,168 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2021-10-28 08:50:45,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 08:50:45,169 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-28 08:50:45,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:45,178 INFO L225 Difference]: With dead ends: 21 [2021-10-28 08:50:45,178 INFO L226 Difference]: Without dead ends: 9 [2021-10-28 08:50:45,181 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 08:50:45,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-28 08:50:45,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-28 08:50:45,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:45,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-28 08:50:45,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-10-28 08:50:45,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:45,205 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-28 08:50:45,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:45,205 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-28 08:50:45,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 08:50:45,205 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:45,205 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:45,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:50:45,206 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:45,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:45,207 INFO L85 PathProgramCache]: Analyzing trace with hash 297871632, now seen corresponding path program 1 times [2021-10-28 08:50:45,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:45,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413071384] [2021-10-28 08:50:45,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:45,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:45,283 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 08:50:45,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:45,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413071384] [2021-10-28 08:50:45,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413071384] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:50:45,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:50:45,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:50:45,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596942315] [2021-10-28 08:50:45,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:50:45,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:50:45,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:50:45,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:50:45,288 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:45,313 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-10-28 08:50:45,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:50:45,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-28 08:50:45,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:45,315 INFO L225 Difference]: With dead ends: 23 [2021-10-28 08:50:45,315 INFO L226 Difference]: Without dead ends: 16 [2021-10-28 08:50:45,316 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:50:45,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-28 08:50:45,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-10-28 08:50:45,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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 08:50:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-28 08:50:45,319 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2021-10-28 08:50:45,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:45,320 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-28 08:50:45,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:45,320 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-28 08:50:45,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 08:50:45,321 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:45,321 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:45,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 08:50:45,322 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:45,323 INFO L85 PathProgramCache]: Analyzing trace with hash 296024590, now seen corresponding path program 1 times [2021-10-28 08:50:45,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:45,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068708902] [2021-10-28 08:50:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:45,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:45,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:45,400 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 08:50:45,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:45,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068708902] [2021-10-28 08:50:45,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068708902] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:50:45,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:50:45,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:50:45,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059897574] [2021-10-28 08:50:45,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:50:45,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:50:45,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:50:45,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:50:45,404 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:45,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:45,432 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-10-28 08:50:45,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:50:45,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-28 08:50:45,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:45,435 INFO L225 Difference]: With dead ends: 18 [2021-10-28 08:50:45,436 INFO L226 Difference]: Without dead ends: 14 [2021-10-28 08:50:45,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:50:45,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-28 08:50:45,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-28 08:50:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:45,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-28 08:50:45,440 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-10-28 08:50:45,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:45,441 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-28 08:50:45,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:45,441 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-28 08:50:45,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 08:50:45,442 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:45,442 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:45,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 08:50:45,463 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:45,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:45,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1661002755, now seen corresponding path program 1 times [2021-10-28 08:50:45,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:45,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185031212] [2021-10-28 08:50:45,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:45,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:45,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:45,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185031212] [2021-10-28 08:50:45,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185031212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:45,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208152072] [2021-10-28 08:50:45,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:45,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:45,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:50:45,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:50:45,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 08:50:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:45,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 08:50:45,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:45,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208152072] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:45,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:45,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-28 08:50:45,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289634317] [2021-10-28 08:50:45,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:50:45,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:50:45,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:50:45,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:50:45,684 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:45,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:45,716 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-10-28 08:50:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:50:45,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-28 08:50:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:45,718 INFO L225 Difference]: With dead ends: 25 [2021-10-28 08:50:45,718 INFO L226 Difference]: Without dead ends: 18 [2021-10-28 08:50:45,718 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:50:45,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-28 08:50:45,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-10-28 08:50:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-28 08:50:45,723 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-10-28 08:50:45,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:45,723 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-28 08:50:45,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:45,723 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-28 08:50:45,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 08:50:45,724 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:45,724 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:45,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:45,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:45,942 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:45,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:45,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1527752176, now seen corresponding path program 2 times [2021-10-28 08:50:45,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:45,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057157597] [2021-10-28 08:50:45,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:45,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:46,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:46,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057157597] [2021-10-28 08:50:46,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057157597] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:46,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981351946] [2021-10-28 08:50:46,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:50:46,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:46,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:50:46,030 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:50:46,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 08:50:46,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:50:46,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:50:46,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 08:50:46,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:50:46,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981351946] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:46,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:46,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-28 08:50:46,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068097179] [2021-10-28 08:50:46,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:50:46,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:50:46,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:50:46,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:50:46,149 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:46,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:46,227 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-10-28 08:50:46,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:50:46,228 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-28 08:50:46,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:46,229 INFO L225 Difference]: With dead ends: 35 [2021-10-28 08:50:46,229 INFO L226 Difference]: Without dead ends: 28 [2021-10-28 08:50:46,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:50:46,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-28 08:50:46,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-10-28 08:50:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-10-28 08:50:46,236 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-10-28 08:50:46,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:46,237 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-10-28 08:50:46,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:46,237 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-10-28 08:50:46,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 08:50:46,238 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:46,238 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:46,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-28 08:50:46,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:46,458 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:46,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:46,459 INFO L85 PathProgramCache]: Analyzing trace with hash -54480515, now seen corresponding path program 3 times [2021-10-28 08:50:46,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:46,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589814001] [2021-10-28 08:50:46,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:46,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 08:50:46,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:46,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589814001] [2021-10-28 08:50:46,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589814001] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:46,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844490710] [2021-10-28 08:50:46,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:50:46,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:46,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:50:46,539 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:50:46,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 08:50:46,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-28 08:50:46,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:50:46,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 08:50:46,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 08:50:46,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844490710] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:46,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:46,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-28 08:50:46,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019257015] [2021-10-28 08:50:46,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:50:46,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:50:46,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:50:46,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:50:46,764 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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 08:50:46,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:46,866 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-10-28 08:50:46,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 08:50:46,867 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-28 08:50:46,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:46,869 INFO L225 Difference]: With dead ends: 52 [2021-10-28 08:50:46,869 INFO L226 Difference]: Without dead ends: 38 [2021-10-28 08:50:46,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-10-28 08:50:46,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-28 08:50:46,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2021-10-28 08:50:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-10-28 08:50:46,888 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2021-10-28 08:50:46,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:46,889 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-10-28 08:50:46,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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 08:50:46,889 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-10-28 08:50:46,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 08:50:46,890 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:46,890 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:46,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:47,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-28 08:50:47,106 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:47,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:47,107 INFO L85 PathProgramCache]: Analyzing trace with hash -125277221, now seen corresponding path program 4 times [2021-10-28 08:50:47,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:47,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215419505] [2021-10-28 08:50:47,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:47,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 08:50:47,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:47,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215419505] [2021-10-28 08:50:47,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215419505] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:47,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394672319] [2021-10-28 08:50:47,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 08:50:47,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:47,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:50:47,214 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:50:47,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 08:50:47,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 08:50:47,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:50:47,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 08:50:47,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 08:50:47,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394672319] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:47,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:47,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-28 08:50:47,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229727195] [2021-10-28 08:50:47,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:50:47,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:50:47,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:50:47,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:50:47,394 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:47,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:47,431 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-10-28 08:50:47,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:50:47,432 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-28 08:50:47,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:47,433 INFO L225 Difference]: With dead ends: 51 [2021-10-28 08:50:47,433 INFO L226 Difference]: Without dead ends: 34 [2021-10-28 08:50:47,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:50:47,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-28 08:50:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-10-28 08:50:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-10-28 08:50:47,444 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 29 [2021-10-28 08:50:47,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:47,444 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-10-28 08:50:47,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-10-28 08:50:47,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 08:50:47,446 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:47,446 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 5, 4, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:47,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:47,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-28 08:50:47,647 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:47,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:47,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1180467442, now seen corresponding path program 5 times [2021-10-28 08:50:47,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:47,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524788318] [2021-10-28 08:50:47,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:47,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 56 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 08:50:47,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:47,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524788318] [2021-10-28 08:50:47,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524788318] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:47,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4055726] [2021-10-28 08:50:47,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 08:50:47,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:47,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:50:47,783 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:50:47,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 08:50:47,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-10-28 08:50:47,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:50:47,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 08:50:47,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 56 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 08:50:47,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4055726] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:47,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:47,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-28 08:50:48,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194884623] [2021-10-28 08:50:48,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:50:48,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:50:48,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:50:48,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:50:48,001 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:48,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:48,030 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-10-28 08:50:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:50:48,033 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-28 08:50:48,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:48,033 INFO L225 Difference]: With dead ends: 54 [2021-10-28 08:50:48,034 INFO L226 Difference]: Without dead ends: 37 [2021-10-28 08:50:48,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:50:48,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-28 08:50:48,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-10-28 08:50:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-10-28 08:50:48,038 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 32 [2021-10-28 08:50:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:48,039 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-10-28 08:50:48,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:48,039 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-10-28 08:50:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 08:50:48,040 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:48,040 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 6, 4, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:48,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:48,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:48,258 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:48,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:48,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1486701829, now seen corresponding path program 6 times [2021-10-28 08:50:48,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:48,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896711927] [2021-10-28 08:50:48,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:48,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 66 proven. 57 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 08:50:48,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:48,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896711927] [2021-10-28 08:50:48,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896711927] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:48,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4684955] [2021-10-28 08:50:48,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 08:50:48,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:48,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:50:48,357 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:50:48,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 08:50:48,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-10-28 08:50:48,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:50:48,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 08:50:48,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 89 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 08:50:48,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4684955] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:48,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:48,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-10-28 08:50:48,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46563491] [2021-10-28 08:50:48,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 08:50:48,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:50:48,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 08:50:48,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:50:48,626 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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 08:50:48,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:48,766 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-10-28 08:50:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 08:50:48,767 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-28 08:50:48,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:48,770 INFO L225 Difference]: With dead ends: 70 [2021-10-28 08:50:48,770 INFO L226 Difference]: Without dead ends: 53 [2021-10-28 08:50:48,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-10-28 08:50:48,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-28 08:50:48,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2021-10-28 08:50:48,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 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 08:50:48,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-10-28 08:50:48,787 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 35 [2021-10-28 08:50:48,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:48,790 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-10-28 08:50:48,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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 08:50:48,790 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-10-28 08:50:48,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-28 08:50:48,793 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:48,793 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 7, 5, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:48,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:49,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:49,010 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:49,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:49,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1793004003, now seen corresponding path program 7 times [2021-10-28 08:50:49,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:49,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207476990] [2021-10-28 08:50:49,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:49,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 99 proven. 77 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 08:50:49,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:49,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207476990] [2021-10-28 08:50:49,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207476990] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:49,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943213307] [2021-10-28 08:50:49,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 08:50:49,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:49,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:50:49,105 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:50:49,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 08:50:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:49,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 08:50:49,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 99 proven. 77 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 08:50:49,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943213307] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:49,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:49,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-28 08:50:49,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708387121] [2021-10-28 08:50:49,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:50:49,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:50:49,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:50:49,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:50:49,324 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 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 08:50:49,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:49,369 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2021-10-28 08:50:49,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:50:49,370 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-28 08:50:49,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:49,371 INFO L225 Difference]: With dead ends: 66 [2021-10-28 08:50:49,371 INFO L226 Difference]: Without dead ends: 46 [2021-10-28 08:50:49,372 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:50:49,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-28 08:50:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-10-28 08:50:49,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 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 08:50:49,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-10-28 08:50:49,387 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 41 [2021-10-28 08:50:49,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:49,388 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-10-28 08:50:49,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 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 08:50:49,388 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-10-28 08:50:49,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-28 08:50:49,389 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:49,389 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 8, 5, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:49,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:49,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 08:50:49,590 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:49,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:49,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1018049328, now seen corresponding path program 8 times [2021-10-28 08:50:49,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:49,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443833911] [2021-10-28 08:50:49,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:49,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 112 proven. 100 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 08:50:49,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:49,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443833911] [2021-10-28 08:50:49,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443833911] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:49,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254534231] [2021-10-28 08:50:49,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:50:49,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:49,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:50:49,754 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:50:49,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 08:50:49,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:50:49,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:50:49,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 08:50:49,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 112 proven. 100 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 08:50:49,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254534231] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:50,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:50,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-28 08:50:50,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813578876] [2021-10-28 08:50:50,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:50:50,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:50:50,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:50:50,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:50:50,002 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:50,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:50,033 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2021-10-28 08:50:50,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:50:50,034 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-10-28 08:50:50,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:50,034 INFO L225 Difference]: With dead ends: 69 [2021-10-28 08:50:50,035 INFO L226 Difference]: Without dead ends: 49 [2021-10-28 08:50:50,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:50:50,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-28 08:50:50,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-10-28 08:50:50,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-10-28 08:50:50,040 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 44 [2021-10-28 08:50:50,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:50,040 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-10-28 08:50:50,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:50,040 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-10-28 08:50:50,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 08:50:50,041 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:50,041 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 9, 5, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:50,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:50,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:50,258 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:50,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:50,258 INFO L85 PathProgramCache]: Analyzing trace with hash 207457597, now seen corresponding path program 9 times [2021-10-28 08:50:50,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:50,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166467554] [2021-10-28 08:50:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:50,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 125 proven. 126 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 08:50:50,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:50,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166467554] [2021-10-28 08:50:50,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166467554] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:50,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783523237] [2021-10-28 08:50:50,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:50:50,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:50,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:50:50,411 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:50:50,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 08:50:50,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-10-28 08:50:50,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:50:50,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 08:50:50,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 13 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:50:50,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783523237] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:50,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:50,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 17 [2021-10-28 08:50:50,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201423618] [2021-10-28 08:50:50,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 08:50:50,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:50:50,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 08:50:50,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-28 08:50:50,786 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:50,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:50,842 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2021-10-28 08:50:50,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:50:50,843 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-10-28 08:50:50,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:50,844 INFO L225 Difference]: With dead ends: 84 [2021-10-28 08:50:50,844 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 08:50:50,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-28 08:50:50,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 08:50:50,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-10-28 08:50:50,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.096774193548387) internal successors, (68), 62 states have internal predecessors, (68), 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 08:50:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-10-28 08:50:50,851 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 47 [2021-10-28 08:50:50,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:50,851 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-10-28 08:50:50,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:50,852 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-10-28 08:50:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-28 08:50:50,853 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:50,853 INFO L513 BasicCegarLoop]: trace histogram [19, 18, 14, 5, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:50,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:51,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 08:50:51,067 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:51,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:51,067 INFO L85 PathProgramCache]: Analyzing trace with hash 32308080, now seen corresponding path program 10 times [2021-10-28 08:50:51,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:51,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259950477] [2021-10-28 08:50:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:51,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 190 proven. 301 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 08:50:51,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:51,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259950477] [2021-10-28 08:50:51,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259950477] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:51,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166379199] [2021-10-28 08:50:51,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 08:50:51,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:51,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:50:51,262 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:50:51,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 08:50:51,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 08:50:51,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:50:51,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 08:50:51,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 190 proven. 301 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 08:50:51,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166379199] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:51,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:51,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-10-28 08:50:51,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632100439] [2021-10-28 08:50:51,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 08:50:51,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:50:51,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 08:50:51,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:50:51,626 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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 08:50:51,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:51,689 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2021-10-28 08:50:51,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 08:50:51,690 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-10-28 08:50:51,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:51,691 INFO L225 Difference]: With dead ends: 87 [2021-10-28 08:50:51,691 INFO L226 Difference]: Without dead ends: 67 [2021-10-28 08:50:51,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:50:51,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-28 08:50:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-10-28 08:50:51,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 65 states have internal predecessors, (71), 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 08:50:51,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2021-10-28 08:50:51,710 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 62 [2021-10-28 08:50:51,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:51,710 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2021-10-28 08:50:51,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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 08:50:51,711 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2021-10-28 08:50:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-28 08:50:51,717 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:51,718 INFO L513 BasicCegarLoop]: trace histogram [20, 19, 15, 5, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:51,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:51,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:51,926 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:51,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:51,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1726719331, now seen corresponding path program 11 times [2021-10-28 08:50:51,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:51,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025385265] [2021-10-28 08:50:51,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:51,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 203 proven. 345 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 08:50:52,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:52,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025385265] [2021-10-28 08:50:52,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025385265] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:52,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147218232] [2021-10-28 08:50:52,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 08:50:52,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:52,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:50:52,147 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:50:52,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 08:50:52,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-10-28 08:50:52,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:50:52,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 08:50:52,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 203 proven. 345 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 08:50:52,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147218232] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:52,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:52,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-28 08:50:52,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682823200] [2021-10-28 08:50:52,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 08:50:52,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:50:52,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 08:50:52,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:50:52,559 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:52,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:52,606 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2021-10-28 08:50:52,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 08:50:52,607 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-10-28 08:50:52,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:52,608 INFO L225 Difference]: With dead ends: 90 [2021-10-28 08:50:52,608 INFO L226 Difference]: Without dead ends: 70 [2021-10-28 08:50:52,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:50:52,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-28 08:50:52,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-10-28 08:50:52,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.088235294117647) internal successors, (74), 68 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:52,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2021-10-28 08:50:52,614 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 65 [2021-10-28 08:50:52,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:52,615 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2021-10-28 08:50:52,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:52,615 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2021-10-28 08:50:52,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-28 08:50:52,616 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:52,616 INFO L513 BasicCegarLoop]: trace histogram [21, 20, 16, 5, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:52,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:52,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 08:50:52,831 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:52,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:52,832 INFO L85 PathProgramCache]: Analyzing trace with hash -2016341936, now seen corresponding path program 12 times [2021-10-28 08:50:52,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:52,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551749328] [2021-10-28 08:50:52,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:52,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 216 proven. 392 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 08:50:53,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:53,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551749328] [2021-10-28 08:50:53,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551749328] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:53,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473107310] [2021-10-28 08:50:53,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 08:50:53,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:53,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:50:53,085 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:50:53,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 08:50:53,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-10-28 08:50:53,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:50:53,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 08:50:53,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 560 proven. 57 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-28 08:50:53,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473107310] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:53,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:53,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-10-28 08:50:53,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470269516] [2021-10-28 08:50:53,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-28 08:50:53,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:50:53,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-28 08:50:53,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 08:50:53,821 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 states have internal predecessors, (115), 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 08:50:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:54,414 INFO L93 Difference]: Finished difference Result 285 states and 368 transitions. [2021-10-28 08:50:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-28 08:50:54,415 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-10-28 08:50:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:54,417 INFO L225 Difference]: With dead ends: 285 [2021-10-28 08:50:54,418 INFO L226 Difference]: Without dead ends: 265 [2021-10-28 08:50:54,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1049, Invalid=3643, Unknown=0, NotChecked=0, Total=4692 [2021-10-28 08:50:54,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-10-28 08:50:54,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 108. [2021-10-28 08:50:54,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 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 08:50:54,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2021-10-28 08:50:54,437 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 68 [2021-10-28 08:50:54,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:54,438 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2021-10-28 08:50:54,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 states have internal predecessors, (115), 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 08:50:54,438 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2021-10-28 08:50:54,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-10-28 08:50:54,444 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:54,445 INFO L513 BasicCegarLoop]: trace histogram [34, 33, 17, 17, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:54,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:54,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 08:50:54,658 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:54,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:54,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1230960643, now seen corresponding path program 13 times [2021-10-28 08:50:54,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:54,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079271403] [2021-10-28 08:50:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:54,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 865 proven. 442 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-10-28 08:50:54,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:54,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079271403] [2021-10-28 08:50:54,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079271403] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:54,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813708312] [2021-10-28 08:50:54,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 08:50:54,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:54,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:50:54,890 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:50:54,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 08:50:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:55,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 08:50:55,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 865 proven. 442 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-10-28 08:50:55,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813708312] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:55,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:55,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-28 08:50:55,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601116371] [2021-10-28 08:50:55,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 08:50:55,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:50:55,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 08:50:55,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-28 08:50:55,482 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:55,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:55,542 INFO L93 Difference]: Finished difference Result 168 states and 203 transitions. [2021-10-28 08:50:55,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 08:50:55,544 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-10-28 08:50:55,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:55,546 INFO L225 Difference]: With dead ends: 168 [2021-10-28 08:50:55,546 INFO L226 Difference]: Without dead ends: 112 [2021-10-28 08:50:55,547 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-28 08:50:55,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-28 08:50:55,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-10-28 08:50:55,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1636363636363636) internal successors, (128), 110 states have internal predecessors, (128), 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 08:50:55,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2021-10-28 08:50:55,555 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 107 [2021-10-28 08:50:55,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:55,555 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2021-10-28 08:50:55,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:55,556 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2021-10-28 08:50:55,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-10-28 08:50:55,557 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:55,558 INFO L513 BasicCegarLoop]: trace histogram [35, 34, 18, 17, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:55,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:55,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 08:50:55,774 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:55,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:55,774 INFO L85 PathProgramCache]: Analyzing trace with hash 174845424, now seen corresponding path program 14 times [2021-10-28 08:50:55,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:55,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339282065] [2021-10-28 08:50:55,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:55,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 914 proven. 495 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-10-28 08:50:56,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:56,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339282065] [2021-10-28 08:50:56,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339282065] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:56,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152316572] [2021-10-28 08:50:56,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:50:56,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:56,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:50:56,044 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:50:56,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 08:50:56,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:50:56,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:50:56,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 08:50:56,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 914 proven. 495 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-10-28 08:50:56,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152316572] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:56,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:56,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-28 08:50:56,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238184935] [2021-10-28 08:50:56,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 08:50:56,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:50:56,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 08:50:56,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-10-28 08:50:56,601 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 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 08:50:56,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:56,660 INFO L93 Difference]: Finished difference Result 171 states and 206 transitions. [2021-10-28 08:50:56,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 08:50:56,661 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-10-28 08:50:56,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:56,662 INFO L225 Difference]: With dead ends: 171 [2021-10-28 08:50:56,662 INFO L226 Difference]: Without dead ends: 115 [2021-10-28 08:50:56,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-10-28 08:50:56,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-28 08:50:56,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-10-28 08:50:56,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 113 states have internal predecessors, (131), 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 08:50:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2021-10-28 08:50:56,671 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 110 [2021-10-28 08:50:56,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:56,672 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2021-10-28 08:50:56,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 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 08:50:56,672 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2021-10-28 08:50:56,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-28 08:50:56,674 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:56,674 INFO L513 BasicCegarLoop]: trace histogram [36, 35, 19, 17, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:56,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:56,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 08:50:56,890 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:56,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:56,890 INFO L85 PathProgramCache]: Analyzing trace with hash 317284125, now seen corresponding path program 15 times [2021-10-28 08:50:56,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:56,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796663497] [2021-10-28 08:50:56,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:56,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 963 proven. 551 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-10-28 08:50:57,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:57,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796663497] [2021-10-28 08:50:57,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796663497] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:57,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677441646] [2021-10-28 08:50:57,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:50:57,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:57,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:50:57,164 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:50:57,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 08:50:57,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-10-28 08:50:57,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:50:57,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-28 08:50:57,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1040 proven. 801 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 08:50:58,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677441646] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:58,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:58,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-10-28 08:50:58,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639088030] [2021-10-28 08:50:58,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-28 08:50:58,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:50:58,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-28 08:50:58,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 08:50:58,295 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 42 states, 42 states have (on average 3.4523809523809526) internal successors, (145), 42 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:59,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:59,080 INFO L93 Difference]: Finished difference Result 330 states and 419 transitions. [2021-10-28 08:50:59,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-28 08:50:59,081 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.4523809523809526) internal successors, (145), 42 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-10-28 08:50:59,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:59,084 INFO L225 Difference]: With dead ends: 330 [2021-10-28 08:50:59,084 INFO L226 Difference]: Without dead ends: 274 [2021-10-28 08:50:59,088 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1415, Invalid=5065, Unknown=0, NotChecked=0, Total=6480 [2021-10-28 08:50:59,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-10-28 08:50:59,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 126. [2021-10-28 08:50:59,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.168) internal successors, (146), 125 states have internal predecessors, (146), 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 08:50:59,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2021-10-28 08:50:59,102 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 113 [2021-10-28 08:50:59,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:59,103 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2021-10-28 08:50:59,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.4523809523809526) internal successors, (145), 42 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:50:59,103 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2021-10-28 08:50:59,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-10-28 08:50:59,105 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:59,105 INFO L513 BasicCegarLoop]: trace histogram [40, 39, 20, 20, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:59,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:59,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 08:50:59,314 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:59,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:59,314 INFO L85 PathProgramCache]: Analyzing trace with hash -934304805, now seen corresponding path program 16 times [2021-10-28 08:50:59,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:59,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977316625] [2021-10-28 08:50:59,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:59,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 1198 proven. 610 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-10-28 08:50:59,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:59,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977316625] [2021-10-28 08:50:59,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977316625] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:59,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873803207] [2021-10-28 08:50:59,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 08:50:59,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:59,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:50:59,685 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:50:59,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 08:51:00,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 08:51:00,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:00,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 08:51:00,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 1198 proven. 610 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-10-28 08:51:00,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873803207] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:00,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:00,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-10-28 08:51:00,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311933273] [2021-10-28 08:51:00,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 08:51:00,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:00,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 08:51:00,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-28 08:51:00,565 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand has 24 states, 24 states have (on average 3.125) internal successors, (75), 24 states have internal predecessors, (75), 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 08:51:00,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:00,641 INFO L93 Difference]: Finished difference Result 195 states and 236 transitions. [2021-10-28 08:51:00,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 08:51:00,641 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 24 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-10-28 08:51:00,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:00,643 INFO L225 Difference]: With dead ends: 195 [2021-10-28 08:51:00,643 INFO L226 Difference]: Without dead ends: 130 [2021-10-28 08:51:00,645 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-28 08:51:00,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-28 08:51:00,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-10-28 08:51:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.1640625) internal successors, (149), 128 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:51:00,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 149 transitions. [2021-10-28 08:51:00,656 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 149 transitions. Word has length 125 [2021-10-28 08:51:00,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:00,657 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 149 transitions. [2021-10-28 08:51:00,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 24 states have internal predecessors, (75), 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 08:51:00,657 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 149 transitions. [2021-10-28 08:51:00,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-10-28 08:51:00,659 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:00,659 INFO L513 BasicCegarLoop]: trace histogram [41, 40, 21, 20, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:00,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:00,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:00,882 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:00,883 INFO L85 PathProgramCache]: Analyzing trace with hash 533074702, now seen corresponding path program 17 times [2021-10-28 08:51:00,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:00,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859468217] [2021-10-28 08:51:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:00,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 1256 proven. 672 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-10-28 08:51:01,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:01,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859468217] [2021-10-28 08:51:01,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859468217] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:01,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634883145] [2021-10-28 08:51:01,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 08:51:01,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:01,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:01,190 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:01,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 08:51:01,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2021-10-28 08:51:01,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:01,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 08:51:01,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 1256 proven. 672 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-10-28 08:51:02,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634883145] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:02,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:02,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-10-28 08:51:02,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366228861] [2021-10-28 08:51:02,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 08:51:02,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:02,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 08:51:02,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-10-28 08:51:02,150 INFO L87 Difference]: Start difference. First operand 129 states and 149 transitions. Second operand has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 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 08:51:02,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:02,232 INFO L93 Difference]: Finished difference Result 198 states and 239 transitions. [2021-10-28 08:51:02,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 08:51:02,233 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-10-28 08:51:02,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:02,234 INFO L225 Difference]: With dead ends: 198 [2021-10-28 08:51:02,234 INFO L226 Difference]: Without dead ends: 133 [2021-10-28 08:51:02,235 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-10-28 08:51:02,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-28 08:51:02,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-10-28 08:51:02,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.1603053435114503) internal successors, (152), 131 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:51:02,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2021-10-28 08:51:02,248 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 128 [2021-10-28 08:51:02,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:02,248 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2021-10-28 08:51:02,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 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 08:51:02,249 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2021-10-28 08:51:02,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-10-28 08:51:02,250 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:02,251 INFO L513 BasicCegarLoop]: trace histogram [42, 41, 22, 20, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:02,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:02,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:02,470 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:02,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:02,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1058829051, now seen corresponding path program 18 times [2021-10-28 08:51:02,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:02,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490330200] [2021-10-28 08:51:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:02,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 1314 proven. 737 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-10-28 08:51:02,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:02,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490330200] [2021-10-28 08:51:02,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490330200] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:02,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611258023] [2021-10-28 08:51:02,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 08:51:02,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:02,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:02,848 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:02,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 08:51:03,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2021-10-28 08:51:03,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:03,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-28 08:51:03,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 1403 proven. 1122 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-10-28 08:51:04,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611258023] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:04,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:04,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-10-28 08:51:04,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878965781] [2021-10-28 08:51:04,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-28 08:51:04,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:04,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-28 08:51:04,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 08:51:04,258 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand has 48 states, 48 states have (on average 3.4583333333333335) internal successors, (166), 48 states have internal predecessors, (166), 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 08:51:05,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:05,028 INFO L93 Difference]: Finished difference Result 384 states and 488 transitions. [2021-10-28 08:51:05,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-10-28 08:51:05,029 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.4583333333333335) internal successors, (166), 48 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-10-28 08:51:05,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:05,031 INFO L225 Difference]: With dead ends: 384 [2021-10-28 08:51:05,031 INFO L226 Difference]: Without dead ends: 319 [2021-10-28 08:51:05,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1835, Invalid=6721, Unknown=0, NotChecked=0, Total=8556 [2021-10-28 08:51:05,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-10-28 08:51:05,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 144. [2021-10-28 08:51:05,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.167832167832168) internal successors, (167), 143 states have internal predecessors, (167), 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 08:51:05,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 167 transitions. [2021-10-28 08:51:05,049 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 167 transitions. Word has length 131 [2021-10-28 08:51:05,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:05,049 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 167 transitions. [2021-10-28 08:51:05,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.4583333333333335) internal successors, (166), 48 states have internal predecessors, (166), 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 08:51:05,050 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 167 transitions. [2021-10-28 08:51:05,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-10-28 08:51:05,051 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:05,052 INFO L513 BasicCegarLoop]: trace histogram [46, 45, 23, 23, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:05,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:05,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 08:51:05,266 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:05,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:05,266 INFO L85 PathProgramCache]: Analyzing trace with hash 901437565, now seen corresponding path program 19 times [2021-10-28 08:51:05,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:05,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315510400] [2021-10-28 08:51:05,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:05,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 1585 proven. 805 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-10-28 08:51:05,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:05,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315510400] [2021-10-28 08:51:05,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315510400] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:05,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261870670] [2021-10-28 08:51:05,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 08:51:05,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:05,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:05,648 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:05,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 08:51:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:06,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 08:51:06,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 1585 proven. 805 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-10-28 08:51:06,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261870670] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:06,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:06,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-10-28 08:51:06,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928418123] [2021-10-28 08:51:06,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 08:51:06,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:06,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 08:51:06,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-10-28 08:51:06,512 INFO L87 Difference]: Start difference. First operand 144 states and 167 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 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 08:51:06,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:06,593 INFO L93 Difference]: Finished difference Result 222 states and 269 transitions. [2021-10-28 08:51:06,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 08:51:06,594 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-10-28 08:51:06,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:06,595 INFO L225 Difference]: With dead ends: 222 [2021-10-28 08:51:06,595 INFO L226 Difference]: Without dead ends: 148 [2021-10-28 08:51:06,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-10-28 08:51:06,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-28 08:51:06,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-10-28 08:51:06,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.1643835616438356) internal successors, (170), 146 states have internal predecessors, (170), 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 08:51:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 170 transitions. [2021-10-28 08:51:06,608 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 170 transitions. Word has length 143 [2021-10-28 08:51:06,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:06,609 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 170 transitions. [2021-10-28 08:51:06,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 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 08:51:06,609 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 170 transitions. [2021-10-28 08:51:06,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-10-28 08:51:06,611 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:06,611 INFO L513 BasicCegarLoop]: trace histogram [47, 46, 24, 23, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:06,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:06,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:06,838 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:06,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:06,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1257963280, now seen corresponding path program 20 times [2021-10-28 08:51:06,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:06,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366549433] [2021-10-28 08:51:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:06,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 1652 proven. 876 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-10-28 08:51:07,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:07,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366549433] [2021-10-28 08:51:07,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366549433] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:07,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361285012] [2021-10-28 08:51:07,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:51:07,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:07,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:07,211 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:07,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 08:51:07,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:51:07,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:07,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 08:51:07,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 1652 proven. 876 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-10-28 08:51:08,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361285012] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:08,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:08,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-10-28 08:51:08,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293485886] [2021-10-28 08:51:08,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 08:51:08,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:08,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 08:51:08,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-10-28 08:51:08,021 INFO L87 Difference]: Start difference. First operand 147 states and 170 transitions. Second operand has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 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 08:51:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:08,095 INFO L93 Difference]: Finished difference Result 225 states and 272 transitions. [2021-10-28 08:51:08,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 08:51:08,096 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-10-28 08:51:08,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:08,097 INFO L225 Difference]: With dead ends: 225 [2021-10-28 08:51:08,097 INFO L226 Difference]: Without dead ends: 151 [2021-10-28 08:51:08,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-10-28 08:51:08,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-10-28 08:51:08,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-10-28 08:51:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.1610738255033557) internal successors, (173), 149 states have internal predecessors, (173), 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 08:51:08,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 173 transitions. [2021-10-28 08:51:08,112 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 173 transitions. Word has length 146 [2021-10-28 08:51:08,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:08,112 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 173 transitions. [2021-10-28 08:51:08,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 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 08:51:08,113 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 173 transitions. [2021-10-28 08:51:08,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-10-28 08:51:08,115 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:08,115 INFO L513 BasicCegarLoop]: trace histogram [48, 47, 25, 23, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:08,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:08,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 08:51:08,329 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:08,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:08,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1948377187, now seen corresponding path program 21 times [2021-10-28 08:51:08,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:08,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230427716] [2021-10-28 08:51:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:08,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 1719 proven. 950 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-10-28 08:51:08,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:08,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230427716] [2021-10-28 08:51:08,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230427716] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:08,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642187770] [2021-10-28 08:51:08,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:51:08,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:08,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:08,738 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:08,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 08:51:09,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2021-10-28 08:51:09,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:09,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-28 08:51:09,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 1820 proven. 1497 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-10-28 08:51:10,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642187770] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:10,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:10,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-10-28 08:51:10,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902745011] [2021-10-28 08:51:10,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-10-28 08:51:10,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:10,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-10-28 08:51:10,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 08:51:10,495 INFO L87 Difference]: Start difference. First operand 150 states and 173 transitions. Second operand has 54 states, 54 states have (on average 3.462962962962963) internal successors, (187), 54 states have internal predecessors, (187), 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 08:51:11,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:11,408 INFO L93 Difference]: Finished difference Result 438 states and 557 transitions. [2021-10-28 08:51:11,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-10-28 08:51:11,409 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.462962962962963) internal successors, (187), 54 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-10-28 08:51:11,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:11,412 INFO L225 Difference]: With dead ends: 438 [2021-10-28 08:51:11,412 INFO L226 Difference]: Without dead ends: 364 [2021-10-28 08:51:11,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2476 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2309, Invalid=8611, Unknown=0, NotChecked=0, Total=10920 [2021-10-28 08:51:11,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-10-28 08:51:11,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 162. [2021-10-28 08:51:11,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.1677018633540373) internal successors, (188), 161 states have internal predecessors, (188), 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 08:51:11,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 188 transitions. [2021-10-28 08:51:11,437 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 188 transitions. Word has length 149 [2021-10-28 08:51:11,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:11,438 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 188 transitions. [2021-10-28 08:51:11,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.462962962962963) internal successors, (187), 54 states have internal predecessors, (187), 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 08:51:11,438 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 188 transitions. [2021-10-28 08:51:11,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-10-28 08:51:11,440 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:11,441 INFO L513 BasicCegarLoop]: trace histogram [52, 51, 26, 26, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:11,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:11,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 08:51:11,666 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:11,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:11,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1177477339, now seen corresponding path program 22 times [2021-10-28 08:51:11,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:11,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587725940] [2021-10-28 08:51:11,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:11,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 2026 proven. 1027 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-28 08:51:12,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:12,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587725940] [2021-10-28 08:51:12,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587725940] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:12,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989518395] [2021-10-28 08:51:12,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 08:51:12,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:12,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:12,053 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:12,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 08:51:12,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 08:51:12,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:12,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 08:51:12,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 2026 proven. 1027 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-28 08:51:13,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989518395] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:13,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:13,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-10-28 08:51:13,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610025068] [2021-10-28 08:51:13,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-28 08:51:13,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:13,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-28 08:51:13,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-10-28 08:51:13,073 INFO L87 Difference]: Start difference. First operand 162 states and 188 transitions. Second operand has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 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 08:51:13,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:13,176 INFO L93 Difference]: Finished difference Result 249 states and 302 transitions. [2021-10-28 08:51:13,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 08:51:13,177 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-10-28 08:51:13,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:13,178 INFO L225 Difference]: With dead ends: 249 [2021-10-28 08:51:13,179 INFO L226 Difference]: Without dead ends: 166 [2021-10-28 08:51:13,179 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-10-28 08:51:13,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-28 08:51:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2021-10-28 08:51:13,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.1646341463414633) internal successors, (191), 164 states have internal predecessors, (191), 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 08:51:13,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 191 transitions. [2021-10-28 08:51:13,196 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 191 transitions. Word has length 161 [2021-10-28 08:51:13,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:13,197 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 191 transitions. [2021-10-28 08:51:13,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 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 08:51:13,197 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 191 transitions. [2021-10-28 08:51:13,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-10-28 08:51:13,199 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:13,200 INFO L513 BasicCegarLoop]: trace histogram [53, 52, 27, 26, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:13,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:13,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 08:51:13,446 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:13,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:13,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1237906062, now seen corresponding path program 23 times [2021-10-28 08:51:13,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:13,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677948501] [2021-10-28 08:51:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:13,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 2102 proven. 1107 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-28 08:51:13,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:13,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677948501] [2021-10-28 08:51:13,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677948501] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:13,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521328037] [2021-10-28 08:51:13,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 08:51:13,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:13,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:13,837 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:13,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 08:51:14,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 53 check-sat command(s) [2021-10-28 08:51:14,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:14,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 08:51:14,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 2102 proven. 1107 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-28 08:51:14,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521328037] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:14,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:14,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-10-28 08:51:14,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816944113] [2021-10-28 08:51:14,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 08:51:14,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:14,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 08:51:14,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-10-28 08:51:14,927 INFO L87 Difference]: Start difference. First operand 165 states and 191 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 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 08:51:15,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:15,010 INFO L93 Difference]: Finished difference Result 252 states and 305 transitions. [2021-10-28 08:51:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 08:51:15,011 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-10-28 08:51:15,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:15,012 INFO L225 Difference]: With dead ends: 252 [2021-10-28 08:51:15,012 INFO L226 Difference]: Without dead ends: 169 [2021-10-28 08:51:15,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-10-28 08:51:15,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-28 08:51:15,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2021-10-28 08:51:15,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1616766467065869) internal successors, (194), 167 states have internal predecessors, (194), 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 08:51:15,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 194 transitions. [2021-10-28 08:51:15,027 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 194 transitions. Word has length 164 [2021-10-28 08:51:15,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:15,028 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 194 transitions. [2021-10-28 08:51:15,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 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 08:51:15,028 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 194 transitions. [2021-10-28 08:51:15,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-10-28 08:51:15,029 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:15,029 INFO L513 BasicCegarLoop]: trace histogram [54, 53, 28, 26, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:15,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-28 08:51:15,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 08:51:15,246 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:15,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:15,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1878695931, now seen corresponding path program 24 times [2021-10-28 08:51:15,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:15,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719662242] [2021-10-28 08:51:15,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:15,247 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 2178 proven. 1190 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-28 08:51:15,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:15,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719662242] [2021-10-28 08:51:15,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719662242] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:15,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305950773] [2021-10-28 08:51:15,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 08:51:15,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:15,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:15,661 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:15,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 08:51:16,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 54 check-sat command(s) [2021-10-28 08:51:16,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:16,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 08:51:16,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 2178 proven. 1190 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-28 08:51:16,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305950773] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:16,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:16,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-10-28 08:51:16,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916541439] [2021-10-28 08:51:16,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 08:51:16,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:16,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 08:51:16,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-10-28 08:51:16,777 INFO L87 Difference]: Start difference. First operand 168 states and 194 transitions. Second operand has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:51:16,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:16,856 INFO L93 Difference]: Finished difference Result 255 states and 308 transitions. [2021-10-28 08:51:16,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 08:51:16,856 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-10-28 08:51:16,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:16,858 INFO L225 Difference]: With dead ends: 255 [2021-10-28 08:51:16,858 INFO L226 Difference]: Without dead ends: 172 [2021-10-28 08:51:16,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-10-28 08:51:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-28 08:51:16,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2021-10-28 08:51:16,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1588235294117648) internal successors, (197), 170 states have internal predecessors, (197), 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 08:51:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 197 transitions. [2021-10-28 08:51:16,873 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 197 transitions. Word has length 167 [2021-10-28 08:51:16,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:16,874 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 197 transitions. [2021-10-28 08:51:16,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:51:16,874 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 197 transitions. [2021-10-28 08:51:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-10-28 08:51:16,875 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:16,876 INFO L513 BasicCegarLoop]: trace histogram [55, 54, 29, 26, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:16,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-28 08:51:17,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:17,082 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:17,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:17,082 INFO L85 PathProgramCache]: Analyzing trace with hash 520052590, now seen corresponding path program 25 times [2021-10-28 08:51:17,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:17,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367794676] [2021-10-28 08:51:17,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:17,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 2254 proven. 1276 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-28 08:51:17,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:17,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367794676] [2021-10-28 08:51:17,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367794676] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:17,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316067995] [2021-10-28 08:51:17,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 08:51:17,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:17,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:17,645 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:17,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 08:51:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:18,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-28 08:51:18,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 2254 proven. 1276 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-28 08:51:18,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316067995] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:18,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:18,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-10-28 08:51:18,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039131560] [2021-10-28 08:51:18,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 08:51:18,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:18,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 08:51:18,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 08:51:18,810 INFO L87 Difference]: Start difference. First operand 171 states and 197 transitions. Second operand has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 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 08:51:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:18,921 INFO L93 Difference]: Finished difference Result 258 states and 311 transitions. [2021-10-28 08:51:18,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 08:51:18,922 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-10-28 08:51:18,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:18,924 INFO L225 Difference]: With dead ends: 258 [2021-10-28 08:51:18,924 INFO L226 Difference]: Without dead ends: 175 [2021-10-28 08:51:18,925 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 08:51:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-10-28 08:51:18,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2021-10-28 08:51:18,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.1560693641618498) internal successors, (200), 173 states have internal predecessors, (200), 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 08:51:18,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 200 transitions. [2021-10-28 08:51:18,946 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 200 transitions. Word has length 170 [2021-10-28 08:51:18,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:18,947 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 200 transitions. [2021-10-28 08:51:18,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 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 08:51:18,947 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 200 transitions. [2021-10-28 08:51:18,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-10-28 08:51:18,949 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:18,949 INFO L513 BasicCegarLoop]: trace histogram [56, 55, 30, 26, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:18,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:19,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 08:51:19,178 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:19,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:19,178 INFO L85 PathProgramCache]: Analyzing trace with hash 948078363, now seen corresponding path program 26 times [2021-10-28 08:51:19,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:19,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693249157] [2021-10-28 08:51:19,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:19,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 2330 proven. 1365 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-28 08:51:19,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:19,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693249157] [2021-10-28 08:51:19,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693249157] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:19,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019147111] [2021-10-28 08:51:19,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:51:19,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:19,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:19,848 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:19,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 08:51:20,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:51:20,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:20,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-28 08:51:20,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 2330 proven. 1365 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-28 08:51:21,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019147111] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:21,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:21,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-10-28 08:51:21,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804387796] [2021-10-28 08:51:21,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-28 08:51:21,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:21,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-28 08:51:21,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 08:51:21,073 INFO L87 Difference]: Start difference. First operand 174 states and 200 transitions. Second operand has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 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 08:51:21,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:21,172 INFO L93 Difference]: Finished difference Result 261 states and 314 transitions. [2021-10-28 08:51:21,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-28 08:51:21,172 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-10-28 08:51:21,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:21,174 INFO L225 Difference]: With dead ends: 261 [2021-10-28 08:51:21,174 INFO L226 Difference]: Without dead ends: 178 [2021-10-28 08:51:21,177 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 08:51:21,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-28 08:51:21,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-10-28 08:51:21,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.1534090909090908) internal successors, (203), 176 states have internal predecessors, (203), 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 08:51:21,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 203 transitions. [2021-10-28 08:51:21,194 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 203 transitions. Word has length 173 [2021-10-28 08:51:21,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:21,194 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 203 transitions. [2021-10-28 08:51:21,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 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 08:51:21,195 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 203 transitions. [2021-10-28 08:51:21,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-10-28 08:51:21,196 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:21,196 INFO L513 BasicCegarLoop]: trace histogram [57, 56, 31, 26, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:21,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:21,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 08:51:21,410 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:21,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:21,411 INFO L85 PathProgramCache]: Analyzing trace with hash 505979982, now seen corresponding path program 27 times [2021-10-28 08:51:21,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:21,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671423720] [2021-10-28 08:51:21,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:21,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:21,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4788 backedges. 2406 proven. 1457 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-10-28 08:51:21,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:21,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671423720] [2021-10-28 08:51:21,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671423720] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:21,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648809751] [2021-10-28 08:51:21,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:51:21,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:21,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:21,959 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:21,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 08:51:22,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2021-10-28 08:51:22,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:22,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-28 08:51:22,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4788 backedges. 2786 proven. 1926 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-10-28 08:51:24,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648809751] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:24,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:24,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-10-28 08:51:24,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695783678] [2021-10-28 08:51:24,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-10-28 08:51:24,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:24,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-10-28 08:51:24,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2021-10-28 08:51:24,100 INFO L87 Difference]: Start difference. First operand 177 states and 203 transitions. Second operand has 66 states, 66 states have (on average 3.4242424242424243) internal successors, (226), 66 states have internal predecessors, (226), 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 08:51:25,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:25,304 INFO L93 Difference]: Finished difference Result 738 states and 953 transitions. [2021-10-28 08:51:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-10-28 08:51:25,305 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.4242424242424243) internal successors, (226), 66 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2021-10-28 08:51:25,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:25,309 INFO L225 Difference]: With dead ends: 738 [2021-10-28 08:51:25,309 INFO L226 Difference]: Without dead ends: 655 [2021-10-28 08:51:25,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3814 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3419, Invalid=13093, Unknown=0, NotChecked=0, Total=16512 [2021-10-28 08:51:25,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-10-28 08:51:25,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 198. [2021-10-28 08:51:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.16751269035533) internal successors, (230), 197 states have internal predecessors, (230), 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 08:51:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 230 transitions. [2021-10-28 08:51:25,344 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 230 transitions. Word has length 176 [2021-10-28 08:51:25,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:25,345 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 230 transitions. [2021-10-28 08:51:25,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.4242424242424243) internal successors, (226), 66 states have internal predecessors, (226), 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 08:51:25,345 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 230 transitions. [2021-10-28 08:51:25,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-10-28 08:51:25,346 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:25,347 INFO L513 BasicCegarLoop]: trace histogram [64, 63, 32, 32, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:25,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:25,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:25,570 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:25,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:25,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1373262373, now seen corresponding path program 28 times [2021-10-28 08:51:25,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:25,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501377158] [2021-10-28 08:51:25,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:25,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 3070 proven. 1552 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-28 08:51:26,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:26,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501377158] [2021-10-28 08:51:26,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501377158] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:26,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94846037] [2021-10-28 08:51:26,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 08:51:26,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:26,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:26,208 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:26,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 08:51:27,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 08:51:27,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:27,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 08:51:27,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 3070 proven. 1552 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-28 08:51:27,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94846037] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:27,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:27,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-10-28 08:51:27,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457538330] [2021-10-28 08:51:27,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-28 08:51:27,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:27,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-28 08:51:27,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 08:51:27,466 INFO L87 Difference]: Start difference. First operand 198 states and 230 transitions. Second operand has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 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 08:51:27,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:27,590 INFO L93 Difference]: Finished difference Result 303 states and 368 transitions. [2021-10-28 08:51:27,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-28 08:51:27,591 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-10-28 08:51:27,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:27,592 INFO L225 Difference]: With dead ends: 303 [2021-10-28 08:51:27,592 INFO L226 Difference]: Without dead ends: 202 [2021-10-28 08:51:27,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 08:51:27,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-10-28 08:51:27,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2021-10-28 08:51:27,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.165) internal successors, (233), 200 states have internal predecessors, (233), 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 08:51:27,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 233 transitions. [2021-10-28 08:51:27,636 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 233 transitions. Word has length 197 [2021-10-28 08:51:27,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:27,636 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 233 transitions. [2021-10-28 08:51:27,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 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 08:51:27,637 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 233 transitions. [2021-10-28 08:51:27,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-10-28 08:51:27,638 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:27,638 INFO L513 BasicCegarLoop]: trace histogram [65, 64, 33, 32, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:27,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:27,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-28 08:51:27,865 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:27,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:27,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1344545294, now seen corresponding path program 29 times [2021-10-28 08:51:27,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:27,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224173632] [2021-10-28 08:51:27,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:27,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 3164 proven. 1650 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-28 08:51:28,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:28,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224173632] [2021-10-28 08:51:28,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224173632] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:28,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639152406] [2021-10-28 08:51:28,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 08:51:28,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:28,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:28,510 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:28,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-28 08:51:29,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2021-10-28 08:51:29,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:29,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 08:51:29,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 3164 proven. 1650 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-28 08:51:29,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639152406] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:29,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:29,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-10-28 08:51:29,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549671590] [2021-10-28 08:51:29,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-28 08:51:29,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:29,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-28 08:51:29,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 08:51:29,946 INFO L87 Difference]: Start difference. First operand 201 states and 233 transitions. Second operand has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 37 states have internal predecessors, (114), 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 08:51:30,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:30,048 INFO L93 Difference]: Finished difference Result 306 states and 371 transitions. [2021-10-28 08:51:30,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-28 08:51:30,049 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 37 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-10-28 08:51:30,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:30,051 INFO L225 Difference]: With dead ends: 306 [2021-10-28 08:51:30,051 INFO L226 Difference]: Without dead ends: 205 [2021-10-28 08:51:30,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 08:51:30,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-10-28 08:51:30,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2021-10-28 08:51:30,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.1625615763546797) internal successors, (236), 203 states have internal predecessors, (236), 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 08:51:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 236 transitions. [2021-10-28 08:51:30,079 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 236 transitions. Word has length 200 [2021-10-28 08:51:30,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:30,080 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 236 transitions. [2021-10-28 08:51:30,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 37 states have internal predecessors, (114), 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 08:51:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 236 transitions. [2021-10-28 08:51:30,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-10-28 08:51:30,081 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:30,082 INFO L513 BasicCegarLoop]: trace histogram [66, 65, 34, 32, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:30,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:30,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-28 08:51:30,294 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:30,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:30,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1170711301, now seen corresponding path program 30 times [2021-10-28 08:51:30,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:30,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092521571] [2021-10-28 08:51:30,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:30,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 3258 proven. 1751 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-28 08:51:30,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:30,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092521571] [2021-10-28 08:51:30,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092521571] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:30,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767525125] [2021-10-28 08:51:30,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 08:51:30,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:30,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:30,887 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:30,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-28 08:51:31,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 66 check-sat command(s) [2021-10-28 08:51:31,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:31,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 08:51:31,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 3258 proven. 1751 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-28 08:51:32,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767525125] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:32,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:32,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-10-28 08:51:32,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696353562] [2021-10-28 08:51:32,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-28 08:51:32,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:32,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-28 08:51:32,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 08:51:32,416 INFO L87 Difference]: Start difference. First operand 204 states and 236 transitions. Second operand has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 38 states have internal predecessors, (117), 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 08:51:32,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:32,529 INFO L93 Difference]: Finished difference Result 309 states and 374 transitions. [2021-10-28 08:51:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-28 08:51:32,530 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 38 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-10-28 08:51:32,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:32,532 INFO L225 Difference]: With dead ends: 309 [2021-10-28 08:51:32,532 INFO L226 Difference]: Without dead ends: 208 [2021-10-28 08:51:32,533 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 08:51:32,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-10-28 08:51:32,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-10-28 08:51:32,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.1601941747572815) internal successors, (239), 206 states have internal predecessors, (239), 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 08:51:32,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 239 transitions. [2021-10-28 08:51:32,557 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 239 transitions. Word has length 203 [2021-10-28 08:51:32,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:32,557 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 239 transitions. [2021-10-28 08:51:32,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 38 states have internal predecessors, (117), 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 08:51:32,558 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 239 transitions. [2021-10-28 08:51:32,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-10-28 08:51:32,559 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:32,560 INFO L513 BasicCegarLoop]: trace histogram [67, 66, 35, 32, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:32,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:32,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-28 08:51:32,766 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:32,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:32,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1114480366, now seen corresponding path program 31 times [2021-10-28 08:51:32,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:32,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065644554] [2021-10-28 08:51:32,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:32,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 3352 proven. 1855 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-28 08:51:33,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:33,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065644554] [2021-10-28 08:51:33,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065644554] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:33,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978514100] [2021-10-28 08:51:33,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 08:51:33,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:33,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:33,360 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:33,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-28 08:51:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:34,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 08:51:34,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 3352 proven. 1855 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-28 08:51:34,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978514100] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:34,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:34,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-10-28 08:51:34,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678173258] [2021-10-28 08:51:34,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-28 08:51:34,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:34,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-28 08:51:34,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 08:51:34,800 INFO L87 Difference]: Start difference. First operand 207 states and 239 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 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 08:51:34,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:34,916 INFO L93 Difference]: Finished difference Result 312 states and 377 transitions. [2021-10-28 08:51:34,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 08:51:34,917 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-10-28 08:51:34,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:34,919 INFO L225 Difference]: With dead ends: 312 [2021-10-28 08:51:34,920 INFO L226 Difference]: Without dead ends: 211 [2021-10-28 08:51:34,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 08:51:34,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-10-28 08:51:34,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2021-10-28 08:51:34,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.1578947368421053) internal successors, (242), 209 states have internal predecessors, (242), 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 08:51:34,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 242 transitions. [2021-10-28 08:51:34,956 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 242 transitions. Word has length 206 [2021-10-28 08:51:34,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:34,957 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 242 transitions. [2021-10-28 08:51:34,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 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 08:51:34,958 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 242 transitions. [2021-10-28 08:51:34,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-10-28 08:51:34,960 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:34,960 INFO L513 BasicCegarLoop]: trace histogram [68, 67, 36, 32, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:34,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-28 08:51:35,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-28 08:51:35,162 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:35,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:35,163 INFO L85 PathProgramCache]: Analyzing trace with hash -267176933, now seen corresponding path program 32 times [2021-10-28 08:51:35,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:35,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978030588] [2021-10-28 08:51:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:35,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 3446 proven. 1962 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-28 08:51:35,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:35,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978030588] [2021-10-28 08:51:35,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978030588] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:35,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128802198] [2021-10-28 08:51:35,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:51:35,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:35,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:35,831 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:35,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-28 08:51:36,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:51:36,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:36,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-28 08:51:36,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 3446 proven. 1962 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-28 08:51:37,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128802198] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:37,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:37,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-10-28 08:51:37,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818182206] [2021-10-28 08:51:37,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-28 08:51:37,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:37,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-28 08:51:37,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 08:51:37,502 INFO L87 Difference]: Start difference. First operand 210 states and 242 transitions. Second operand has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:51:37,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:37,640 INFO L93 Difference]: Finished difference Result 315 states and 380 transitions. [2021-10-28 08:51:37,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-28 08:51:37,640 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2021-10-28 08:51:37,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:37,642 INFO L225 Difference]: With dead ends: 315 [2021-10-28 08:51:37,642 INFO L226 Difference]: Without dead ends: 214 [2021-10-28 08:51:37,643 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 08:51:37,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-10-28 08:51:37,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2021-10-28 08:51:37,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.1556603773584906) internal successors, (245), 212 states have internal predecessors, (245), 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 08:51:37,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 245 transitions. [2021-10-28 08:51:37,671 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 245 transitions. Word has length 209 [2021-10-28 08:51:37,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:37,672 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 245 transitions. [2021-10-28 08:51:37,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:51:37,672 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 245 transitions. [2021-10-28 08:51:37,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-10-28 08:51:37,674 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:37,674 INFO L513 BasicCegarLoop]: trace histogram [69, 68, 37, 32, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:37,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:37,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:37,889 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:37,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:37,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1746793422, now seen corresponding path program 33 times [2021-10-28 08:51:37,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:37,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043529238] [2021-10-28 08:51:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:37,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 3540 proven. 2072 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-10-28 08:51:38,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:38,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043529238] [2021-10-28 08:51:38,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043529238] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:38,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933071471] [2021-10-28 08:51:38,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:51:38,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:38,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:38,692 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:38,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-28 08:51:39,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2021-10-28 08:51:39,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:40,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 71 conjunts are in the unsatisfiable core [2021-10-28 08:51:40,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 3998 proven. 2946 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-10-28 08:51:41,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933071471] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:41,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:41,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2021-10-28 08:51:41,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115119196] [2021-10-28 08:51:41,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-10-28 08:51:41,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:41,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-10-28 08:51:41,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2021-10-28 08:51:41,702 INFO L87 Difference]: Start difference. First operand 213 states and 245 transitions. Second operand has 78 states, 78 states have (on average 3.4358974358974357) internal successors, (268), 78 states have internal predecessors, (268), 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 08:51:43,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:43,120 INFO L93 Difference]: Finished difference Result 900 states and 1163 transitions. [2021-10-28 08:51:43,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-10-28 08:51:43,121 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.4358974358974357) internal successors, (268), 78 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 212 [2021-10-28 08:51:43,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:43,125 INFO L225 Difference]: With dead ends: 900 [2021-10-28 08:51:43,125 INFO L226 Difference]: Without dead ends: 799 [2021-10-28 08:51:43,128 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5440 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4745, Invalid=18511, Unknown=0, NotChecked=0, Total=23256 [2021-10-28 08:51:43,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-10-28 08:51:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 234. [2021-10-28 08:51:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.167381974248927) internal successors, (272), 233 states have internal predecessors, (272), 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 08:51:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 272 transitions. [2021-10-28 08:51:43,170 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 272 transitions. Word has length 212 [2021-10-28 08:51:43,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:43,170 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 272 transitions. [2021-10-28 08:51:43,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.4358974358974357) internal successors, (268), 78 states have internal predecessors, (268), 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 08:51:43,171 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 272 transitions. [2021-10-28 08:51:43,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-10-28 08:51:43,174 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:43,174 INFO L513 BasicCegarLoop]: trace histogram [76, 75, 38, 38, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:43,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:43,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-28 08:51:43,390 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:43,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:43,390 INFO L85 PathProgramCache]: Analyzing trace with hash 625478363, now seen corresponding path program 34 times [2021-10-28 08:51:43,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:43,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47182464] [2021-10-28 08:51:43,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:43,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 4330 proven. 2185 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-28 08:51:44,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:44,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47182464] [2021-10-28 08:51:44,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47182464] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:44,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518840718] [2021-10-28 08:51:44,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 08:51:44,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:44,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:44,178 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:44,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-28 08:51:45,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 08:51:45,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:45,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 08:51:45,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 4330 proven. 2185 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-28 08:51:45,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518840718] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:45,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:45,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-10-28 08:51:45,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982032802] [2021-10-28 08:51:45,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-28 08:51:45,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:45,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-28 08:51:45,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 08:51:45,929 INFO L87 Difference]: Start difference. First operand 234 states and 272 transitions. Second operand has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 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 08:51:46,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:46,045 INFO L93 Difference]: Finished difference Result 357 states and 434 transitions. [2021-10-28 08:51:46,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-28 08:51:46,046 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2021-10-28 08:51:46,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:46,047 INFO L225 Difference]: With dead ends: 357 [2021-10-28 08:51:46,047 INFO L226 Difference]: Without dead ends: 238 [2021-10-28 08:51:46,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 08:51:46,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-10-28 08:51:46,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2021-10-28 08:51:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.1652542372881356) internal successors, (275), 236 states have internal predecessors, (275), 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 08:51:46,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 275 transitions. [2021-10-28 08:51:46,094 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 275 transitions. Word has length 233 [2021-10-28 08:51:46,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:46,095 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 275 transitions. [2021-10-28 08:51:46,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 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 08:51:46,095 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 275 transitions. [2021-10-28 08:51:46,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-10-28 08:51:46,097 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:46,098 INFO L513 BasicCegarLoop]: trace histogram [77, 76, 39, 38, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:46,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:46,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 08:51:46,326 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:46,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:46,326 INFO L85 PathProgramCache]: Analyzing trace with hash 378249614, now seen corresponding path program 35 times [2021-10-28 08:51:46,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:46,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505217794] [2021-10-28 08:51:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:46,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 4442 proven. 2301 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-28 08:51:47,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:47,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505217794] [2021-10-28 08:51:47,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505217794] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:47,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906568455] [2021-10-28 08:51:47,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 08:51:47,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:47,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:47,120 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:47,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-28 08:51:48,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 77 check-sat command(s) [2021-10-28 08:51:48,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:48,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-28 08:51:48,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 4442 proven. 2301 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-28 08:51:48,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906568455] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:48,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:48,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-10-28 08:51:48,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595326210] [2021-10-28 08:51:48,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-28 08:51:48,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:48,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-28 08:51:48,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 08:51:48,969 INFO L87 Difference]: Start difference. First operand 237 states and 275 transitions. Second operand has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 43 states have internal predecessors, (132), 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 08:51:49,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:49,121 INFO L93 Difference]: Finished difference Result 360 states and 437 transitions. [2021-10-28 08:51:49,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-28 08:51:49,121 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 43 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-10-28 08:51:49,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:49,124 INFO L225 Difference]: With dead ends: 360 [2021-10-28 08:51:49,124 INFO L226 Difference]: Without dead ends: 241 [2021-10-28 08:51:49,125 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 08:51:49,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-10-28 08:51:49,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2021-10-28 08:51:49,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.1631799163179917) internal successors, (278), 239 states have internal predecessors, (278), 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 08:51:49,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 278 transitions. [2021-10-28 08:51:49,199 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 278 transitions. Word has length 236 [2021-10-28 08:51:49,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:49,200 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 278 transitions. [2021-10-28 08:51:49,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 43 states have internal predecessors, (132), 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 08:51:49,200 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 278 transitions. [2021-10-28 08:51:49,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-10-28 08:51:49,202 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:49,203 INFO L513 BasicCegarLoop]: trace histogram [78, 77, 40, 38, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:49,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:49,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-28 08:51:49,430 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:49,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:49,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1055500795, now seen corresponding path program 36 times [2021-10-28 08:51:49,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:49,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823812507] [2021-10-28 08:51:49,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:49,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 4554 proven. 2420 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-28 08:51:50,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:50,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823812507] [2021-10-28 08:51:50,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823812507] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:50,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764553762] [2021-10-28 08:51:50,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 08:51:50,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:50,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:50,180 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:50,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-28 08:51:51,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 78 check-sat command(s) [2021-10-28 08:51:51,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:51,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-28 08:51:51,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 4554 proven. 2420 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-28 08:51:52,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764553762] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:52,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:52,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-10-28 08:51:52,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757801685] [2021-10-28 08:51:52,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-28 08:51:52,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:52,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-28 08:51:52,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 08:51:52,313 INFO L87 Difference]: Start difference. First operand 240 states and 278 transitions. Second operand has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 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 08:51:52,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:52,481 INFO L93 Difference]: Finished difference Result 363 states and 440 transitions. [2021-10-28 08:51:52,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-28 08:51:52,481 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2021-10-28 08:51:52,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:52,484 INFO L225 Difference]: With dead ends: 363 [2021-10-28 08:51:52,484 INFO L226 Difference]: Without dead ends: 244 [2021-10-28 08:51:52,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 08:51:52,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-10-28 08:51:52,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2021-10-28 08:51:52,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.1611570247933884) internal successors, (281), 242 states have internal predecessors, (281), 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 08:51:52,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 281 transitions. [2021-10-28 08:51:52,533 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 281 transitions. Word has length 239 [2021-10-28 08:51:52,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:52,533 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 281 transitions. [2021-10-28 08:51:52,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 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 08:51:52,534 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 281 transitions. [2021-10-28 08:51:52,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-10-28 08:51:52,536 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:52,536 INFO L513 BasicCegarLoop]: trace histogram [79, 78, 41, 38, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:52,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-28 08:51:52,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-28 08:51:52,762 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:52,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:52,762 INFO L85 PathProgramCache]: Analyzing trace with hash -710922642, now seen corresponding path program 37 times [2021-10-28 08:51:52,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:52,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573694359] [2021-10-28 08:51:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:52,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 4666 proven. 2542 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-28 08:51:53,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:53,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573694359] [2021-10-28 08:51:53,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573694359] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:53,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702047958] [2021-10-28 08:51:53,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 08:51:53,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:53,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:53,878 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:53,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-28 08:51:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:55,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-28 08:51:55,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 4666 proven. 2542 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-28 08:51:56,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702047958] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:56,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:56,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-10-28 08:51:56,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348673107] [2021-10-28 08:51:56,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-28 08:51:56,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:56,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-28 08:51:56,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 08:51:56,052 INFO L87 Difference]: Start difference. First operand 243 states and 281 transitions. Second operand has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 45 states have internal predecessors, (138), 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 08:51:56,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:56,229 INFO L93 Difference]: Finished difference Result 366 states and 443 transitions. [2021-10-28 08:51:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-28 08:51:56,229 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 45 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2021-10-28 08:51:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:56,231 INFO L225 Difference]: With dead ends: 366 [2021-10-28 08:51:56,231 INFO L226 Difference]: Without dead ends: 247 [2021-10-28 08:51:56,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 08:51:56,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-10-28 08:51:56,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2021-10-28 08:51:56,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.1591836734693877) internal successors, (284), 245 states have internal predecessors, (284), 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 08:51:56,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 284 transitions. [2021-10-28 08:51:56,277 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 284 transitions. Word has length 242 [2021-10-28 08:51:56,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:56,278 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 284 transitions. [2021-10-28 08:51:56,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 45 states have internal predecessors, (138), 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 08:51:56,279 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 284 transitions. [2021-10-28 08:51:56,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-10-28 08:51:56,281 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:56,281 INFO L513 BasicCegarLoop]: trace histogram [80, 79, 42, 38, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:56,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-28 08:51:56,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 08:51:56,486 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:56,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:56,486 INFO L85 PathProgramCache]: Analyzing trace with hash 2002743579, now seen corresponding path program 38 times [2021-10-28 08:51:56,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:51:56,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080678021] [2021-10-28 08:51:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:51:56,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:51:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:51:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9480 backedges. 4778 proven. 2667 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-28 08:51:57,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:51:57,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080678021] [2021-10-28 08:51:57,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080678021] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:57,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413168023] [2021-10-28 08:51:57,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:51:57,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:51:57,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:51:57,397 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:51:57,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-28 08:51:59,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:51:59,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:59,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-28 08:51:59,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9480 backedges. 4778 proven. 2667 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-28 08:51:59,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413168023] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:59,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:59,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-10-28 08:51:59,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492859328] [2021-10-28 08:51:59,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-28 08:51:59,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:59,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-28 08:51:59,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 08:51:59,575 INFO L87 Difference]: Start difference. First operand 246 states and 284 transitions. Second operand has 46 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 46 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:51:59,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:59,750 INFO L93 Difference]: Finished difference Result 369 states and 446 transitions. [2021-10-28 08:51:59,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-28 08:51:59,751 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 46 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 245 [2021-10-28 08:51:59,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:59,754 INFO L225 Difference]: With dead ends: 369 [2021-10-28 08:51:59,754 INFO L226 Difference]: Without dead ends: 250 [2021-10-28 08:51:59,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 08:51:59,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-10-28 08:51:59,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2021-10-28 08:51:59,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.157258064516129) internal successors, (287), 248 states have internal predecessors, (287), 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 08:51:59,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 287 transitions. [2021-10-28 08:51:59,804 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 287 transitions. Word has length 245 [2021-10-28 08:51:59,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:59,805 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 287 transitions. [2021-10-28 08:51:59,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 46 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:51:59,805 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 287 transitions. [2021-10-28 08:51:59,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-10-28 08:51:59,807 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:59,808 INFO L513 BasicCegarLoop]: trace histogram [81, 80, 43, 38, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:59,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-28 08:52:00,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:52:00,021 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:52:00,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:00,021 INFO L85 PathProgramCache]: Analyzing trace with hash 663720782, now seen corresponding path program 39 times [2021-10-28 08:52:00,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:00,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002980222] [2021-10-28 08:52:00,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:00,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 4890 proven. 2795 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-10-28 08:52:01,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:01,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002980222] [2021-10-28 08:52:01,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002980222] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:52:01,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923079060] [2021-10-28 08:52:01,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:52:01,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:52:01,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:52:01,001 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:52:01,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-28 08:52:02,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2021-10-28 08:52:02,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:52:02,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-28 08:52:02,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:52:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 5426 proven. 4182 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-10-28 08:52:04,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923079060] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:52:04,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:52:04,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 90 [2021-10-28 08:52:04,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214065958] [2021-10-28 08:52:04,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-10-28 08:52:04,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:04,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-10-28 08:52:04,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2021-10-28 08:52:04,822 INFO L87 Difference]: Start difference. First operand 249 states and 287 transitions. Second operand has 90 states, 90 states have (on average 3.4444444444444446) internal successors, (310), 90 states have internal predecessors, (310), 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 08:52:06,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:06,598 INFO L93 Difference]: Finished difference Result 1062 states and 1373 transitions. [2021-10-28 08:52:06,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-10-28 08:52:06,598 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.4444444444444446) internal successors, (310), 90 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 248 [2021-10-28 08:52:06,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:06,604 INFO L225 Difference]: With dead ends: 1062 [2021-10-28 08:52:06,605 INFO L226 Difference]: Without dead ends: 943 [2021-10-28 08:52:06,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7354 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6287, Invalid=24865, Unknown=0, NotChecked=0, Total=31152 [2021-10-28 08:52:06,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-10-28 08:52:06,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 270. [2021-10-28 08:52:06,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.1672862453531598) internal successors, (314), 269 states have internal predecessors, (314), 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 08:52:06,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 314 transitions. [2021-10-28 08:52:06,686 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 314 transitions. Word has length 248 [2021-10-28 08:52:06,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:06,687 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 314 transitions. [2021-10-28 08:52:06,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.4444444444444446) internal successors, (310), 90 states have internal predecessors, (310), 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 08:52:06,687 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 314 transitions. [2021-10-28 08:52:06,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-10-28 08:52:06,689 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:06,689 INFO L513 BasicCegarLoop]: trace histogram [88, 87, 44, 44, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:06,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-28 08:52:06,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:52:06,906 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:52:06,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:06,906 INFO L85 PathProgramCache]: Analyzing trace with hash 665450459, now seen corresponding path program 40 times [2021-10-28 08:52:06,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:06,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540021656] [2021-10-28 08:52:06,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:06,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11484 backedges. 5806 proven. 2926 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-10-28 08:52:08,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:08,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540021656] [2021-10-28 08:52:08,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540021656] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:52:08,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615716973] [2021-10-28 08:52:08,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 08:52:08,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:52:08,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:52:08,031 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:52:08,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-28 08:52:09,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 08:52:09,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:52:09,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-28 08:52:09,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:52:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11484 backedges. 5806 proven. 2926 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-10-28 08:52:10,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615716973] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:52:10,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:52:10,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-10-28 08:52:10,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253201548] [2021-10-28 08:52:10,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-28 08:52:10,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:10,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-28 08:52:10,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 08:52:10,379 INFO L87 Difference]: Start difference. First operand 270 states and 314 transitions. Second operand has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 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 08:52:10,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:10,560 INFO L93 Difference]: Finished difference Result 411 states and 500 transitions. [2021-10-28 08:52:10,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-28 08:52:10,561 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2021-10-28 08:52:10,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:10,563 INFO L225 Difference]: With dead ends: 411 [2021-10-28 08:52:10,563 INFO L226 Difference]: Without dead ends: 274 [2021-10-28 08:52:10,565 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 08:52:10,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-10-28 08:52:10,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2021-10-28 08:52:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.1654411764705883) internal successors, (317), 272 states have internal predecessors, (317), 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 08:52:10,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 317 transitions. [2021-10-28 08:52:10,624 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 317 transitions. Word has length 269 [2021-10-28 08:52:10,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:10,626 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 317 transitions. [2021-10-28 08:52:10,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 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 08:52:10,627 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 317 transitions. [2021-10-28 08:52:10,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-10-28 08:52:10,630 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:10,630 INFO L513 BasicCegarLoop]: trace histogram [89, 88, 45, 44, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:10,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-28 08:52:10,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:52:10,854 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:52:10,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:10,854 INFO L85 PathProgramCache]: Analyzing trace with hash 129200398, now seen corresponding path program 41 times [2021-10-28 08:52:10,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:10,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459810059] [2021-10-28 08:52:10,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:10,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11748 backedges. 5936 proven. 3060 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-10-28 08:52:12,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:12,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459810059] [2021-10-28 08:52:12,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459810059] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:52:12,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329554458] [2021-10-28 08:52:12,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 08:52:12,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:52:12,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:52:12,090 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:52:12,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-28 08:52:13,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 89 check-sat command(s) [2021-10-28 08:52:13,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:52:14,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-28 08:52:14,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:52:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11748 backedges. 5936 proven. 3060 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-10-28 08:52:14,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329554458] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:52:14,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:52:14,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-10-28 08:52:14,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944512862] [2021-10-28 08:52:14,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-28 08:52:14,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:14,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-28 08:52:14,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 08:52:14,679 INFO L87 Difference]: Start difference. First operand 273 states and 317 transitions. Second operand has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 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 08:52:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:14,827 INFO L93 Difference]: Finished difference Result 414 states and 503 transitions. [2021-10-28 08:52:14,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-28 08:52:14,828 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 272 [2021-10-28 08:52:14,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:14,852 INFO L225 Difference]: With dead ends: 414 [2021-10-28 08:52:14,852 INFO L226 Difference]: Without dead ends: 277 [2021-10-28 08:52:14,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 08:52:14,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-10-28 08:52:14,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 276. [2021-10-28 08:52:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.1636363636363636) internal successors, (320), 275 states have internal predecessors, (320), 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 08:52:14,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 320 transitions. [2021-10-28 08:52:14,905 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 320 transitions. Word has length 272 [2021-10-28 08:52:14,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:14,905 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 320 transitions. [2021-10-28 08:52:14,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 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 08:52:14,906 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 320 transitions. [2021-10-28 08:52:14,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-10-28 08:52:14,907 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:14,907 INFO L513 BasicCegarLoop]: trace histogram [90, 89, 46, 44, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:14,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-10-28 08:52:15,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:52:15,118 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:52:15,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:15,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1981974267, now seen corresponding path program 42 times [2021-10-28 08:52:15,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:15,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101894733] [2021-10-28 08:52:15,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:15,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12015 backedges. 6066 proven. 3197 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-10-28 08:52:16,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:16,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101894733] [2021-10-28 08:52:16,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101894733] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:52:16,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210724910] [2021-10-28 08:52:16,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 08:52:16,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:52:16,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:52:16,068 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:52:16,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-28 08:52:18,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 90 check-sat command(s) [2021-10-28 08:52:18,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:52:18,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 92 conjunts are in the unsatisfiable core [2021-10-28 08:52:18,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:52:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12015 backedges. 6251 proven. 5634 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-28 08:52:20,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210724910] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:52:20,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:52:20,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2021-10-28 08:52:20,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517463491] [2021-10-28 08:52:20,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-10-28 08:52:20,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:20,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-10-28 08:52:20,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2021-10-28 08:52:20,575 INFO L87 Difference]: Start difference. First operand 276 states and 320 transitions. Second operand has 96 states, 96 states have (on average 3.4791666666666665) internal successors, (334), 96 states have internal predecessors, (334), 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 08:52:22,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:22,321 INFO L93 Difference]: Finished difference Result 816 states and 1040 transitions. [2021-10-28 08:52:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-10-28 08:52:22,321 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.4791666666666665) internal successors, (334), 96 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 275 [2021-10-28 08:52:22,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:22,324 INFO L225 Difference]: With dead ends: 816 [2021-10-28 08:52:22,324 INFO L226 Difference]: Without dead ends: 679 [2021-10-28 08:52:22,326 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8419 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=7139, Invalid=28393, Unknown=0, NotChecked=0, Total=35532 [2021-10-28 08:52:22,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-10-28 08:52:22,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 288. [2021-10-28 08:52:22,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.1672473867595818) internal successors, (335), 287 states have internal predecessors, (335), 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 08:52:22,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 335 transitions. [2021-10-28 08:52:22,402 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 335 transitions. Word has length 275 [2021-10-28 08:52:22,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:22,403 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 335 transitions. [2021-10-28 08:52:22,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.4791666666666665) internal successors, (334), 96 states have internal predecessors, (334), 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 08:52:22,403 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 335 transitions. [2021-10-28 08:52:22,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-10-28 08:52:22,406 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:22,406 INFO L513 BasicCegarLoop]: trace histogram [94, 93, 47, 47, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:22,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-28 08:52:22,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:52:22,610 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:52:22,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:22,610 INFO L85 PathProgramCache]: Analyzing trace with hash -738002307, now seen corresponding path program 43 times [2021-10-28 08:52:22,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:22,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616388787] [2021-10-28 08:52:22,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:22,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13113 backedges. 6625 proven. 3337 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-10-28 08:52:23,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:23,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616388787] [2021-10-28 08:52:23,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616388787] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:52:23,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68645999] [2021-10-28 08:52:23,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 08:52:23,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:52:23,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:52:23,952 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:52:23,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-28 08:52:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:25,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-28 08:52:25,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:52:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13113 backedges. 6625 proven. 3337 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-10-28 08:52:26,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68645999] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:52:26,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:52:26,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-10-28 08:52:26,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310612375] [2021-10-28 08:52:26,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-28 08:52:26,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:26,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-28 08:52:26,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 08:52:26,397 INFO L87 Difference]: Start difference. First operand 288 states and 335 transitions. Second operand has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 51 states have internal predecessors, (156), 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 08:52:26,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:26,569 INFO L93 Difference]: Finished difference Result 438 states and 533 transitions. [2021-10-28 08:52:26,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-28 08:52:26,569 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 51 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 287 [2021-10-28 08:52:26,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:26,571 INFO L225 Difference]: With dead ends: 438 [2021-10-28 08:52:26,571 INFO L226 Difference]: Without dead ends: 292 [2021-10-28 08:52:26,571 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 08:52:26,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-10-28 08:52:26,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2021-10-28 08:52:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.1655172413793105) internal successors, (338), 290 states have internal predecessors, (338), 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 08:52:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 338 transitions. [2021-10-28 08:52:26,657 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 338 transitions. Word has length 287 [2021-10-28 08:52:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:26,658 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 338 transitions. [2021-10-28 08:52:26,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 51 states have internal predecessors, (156), 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 08:52:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 338 transitions. [2021-10-28 08:52:26,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-10-28 08:52:26,661 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:26,662 INFO L513 BasicCegarLoop]: trace histogram [95, 94, 48, 47, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:26,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-28 08:52:26,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-28 08:52:26,890 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:52:26,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:26,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1527665424, now seen corresponding path program 44 times [2021-10-28 08:52:26,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:26,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596199729] [2021-10-28 08:52:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:26,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 6764 proven. 3480 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-10-28 08:52:28,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:28,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596199729] [2021-10-28 08:52:28,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596199729] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:52:28,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224441319] [2021-10-28 08:52:28,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:52:28,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:52:28,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:52:28,105 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:52:28,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-28 08:52:29,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:52:30,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:52:30,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-28 08:52:30,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:52:30,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 6764 proven. 3480 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-10-28 08:52:30,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224441319] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:52:30,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:52:30,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-10-28 08:52:30,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418110900] [2021-10-28 08:52:30,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-28 08:52:30,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:30,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-28 08:52:30,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 08:52:30,803 INFO L87 Difference]: Start difference. First operand 291 states and 338 transitions. Second operand has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 52 states have internal predecessors, (159), 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 08:52:31,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:31,030 INFO L93 Difference]: Finished difference Result 441 states and 536 transitions. [2021-10-28 08:52:31,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-28 08:52:31,030 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 52 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 290 [2021-10-28 08:52:31,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:31,032 INFO L225 Difference]: With dead ends: 441 [2021-10-28 08:52:31,032 INFO L226 Difference]: Without dead ends: 295 [2021-10-28 08:52:31,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 08:52:31,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-10-28 08:52:31,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2021-10-28 08:52:31,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.1638225255972696) internal successors, (341), 293 states have internal predecessors, (341), 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 08:52:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 341 transitions. [2021-10-28 08:52:31,089 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 341 transitions. Word has length 290 [2021-10-28 08:52:31,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:31,089 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 341 transitions. [2021-10-28 08:52:31,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 52 states have internal predecessors, (159), 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 08:52:31,089 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 341 transitions. [2021-10-28 08:52:31,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-10-28 08:52:31,091 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:31,091 INFO L513 BasicCegarLoop]: trace histogram [96, 95, 49, 47, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:31,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-10-28 08:52:31,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-28 08:52:31,292 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:52:31,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:31,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1449263517, now seen corresponding path program 45 times [2021-10-28 08:52:31,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:31,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428052044] [2021-10-28 08:52:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:31,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13680 backedges. 6903 proven. 3626 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-10-28 08:52:32,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:32,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428052044] [2021-10-28 08:52:32,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428052044] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:52:32,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631427650] [2021-10-28 08:52:32,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:52:32,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:52:32,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:52:32,626 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:52:32,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-28 08:52:34,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 96 check-sat command(s) [2021-10-28 08:52:34,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:52:34,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 98 conjunts are in the unsatisfiable core [2021-10-28 08:52:34,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:52:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 13680 backedges. 7100 proven. 6441 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-10-28 08:52:37,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631427650] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:52:37,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:52:37,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 102 [2021-10-28 08:52:37,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934954307] [2021-10-28 08:52:37,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-10-28 08:52:37,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:37,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-10-28 08:52:37,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2021-10-28 08:52:37,685 INFO L87 Difference]: Start difference. First operand 294 states and 341 transitions. Second operand has 102 states, 102 states have (on average 3.480392156862745) internal successors, (355), 102 states have internal predecessors, (355), 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 08:52:41,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:41,841 INFO L93 Difference]: Finished difference Result 1049 states and 1288 transitions. [2021-10-28 08:52:41,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2021-10-28 08:52:41,841 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.480392156862745) internal successors, (355), 102 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2021-10-28 08:52:41,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:41,847 INFO L225 Difference]: With dead ends: 1049 [2021-10-28 08:52:41,848 INFO L226 Difference]: Without dead ends: 903 [2021-10-28 08:52:41,854 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17740 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=12989, Invalid=48763, Unknown=0, NotChecked=0, Total=61752 [2021-10-28 08:52:41,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-10-28 08:52:41,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 306. [2021-10-28 08:52:41,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1672131147540983) internal successors, (356), 305 states have internal predecessors, (356), 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 08:52:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 356 transitions. [2021-10-28 08:52:41,966 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 356 transitions. Word has length 293 [2021-10-28 08:52:41,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:41,967 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 356 transitions. [2021-10-28 08:52:41,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.480392156862745) internal successors, (355), 102 states have internal predecessors, (355), 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 08:52:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 356 transitions. [2021-10-28 08:52:41,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-10-28 08:52:41,970 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:41,970 INFO L513 BasicCegarLoop]: trace histogram [100, 99, 50, 50, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:42,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-28 08:52:42,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-28 08:52:42,186 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:52:42,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:42,186 INFO L85 PathProgramCache]: Analyzing trace with hash -933268261, now seen corresponding path program 46 times [2021-10-28 08:52:42,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:42,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562265808] [2021-10-28 08:52:42,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:42,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 7203 proven. 7500 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-10-28 08:52:43,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:43,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562265808] [2021-10-28 08:52:43,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562265808] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:52:43,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531846453] [2021-10-28 08:52:43,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 08:52:43,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:52:43,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:52:43,755 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:52:43,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-28 08:52:46,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 08:52:46,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:52:46,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 102 conjunts are in the unsatisfiable core [2021-10-28 08:52:46,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:52:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 7401 proven. 7302 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-10-28 08:52:46,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531846453] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:52:46,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:52:46,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 54 [2021-10-28 08:52:46,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467542558] [2021-10-28 08:52:46,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-10-28 08:52:46,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:46,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-10-28 08:52:46,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 08:52:46,957 INFO L87 Difference]: Start difference. First operand 306 states and 356 transitions. Second operand has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 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 08:52:47,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:47,448 INFO L93 Difference]: Finished difference Result 461 states and 561 transitions. [2021-10-28 08:52:47,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-28 08:52:47,448 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 305 [2021-10-28 08:52:47,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:47,451 INFO L225 Difference]: With dead ends: 461 [2021-10-28 08:52:47,451 INFO L226 Difference]: Without dead ends: 457 [2021-10-28 08:52:47,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 08:52:47,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-10-28 08:52:47,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 309. [2021-10-28 08:52:47,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.1688311688311688) internal successors, (360), 308 states have internal predecessors, (360), 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 08:52:47,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 360 transitions. [2021-10-28 08:52:47,557 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 360 transitions. Word has length 305 [2021-10-28 08:52:47,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:47,558 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 360 transitions. [2021-10-28 08:52:47,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 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 08:52:47,558 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 360 transitions. [2021-10-28 08:52:47,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-10-28 08:52:47,560 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:47,561 INFO L513 BasicCegarLoop]: trace histogram [101, 100, 51, 50, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:47,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-28 08:52:47,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:52:47,774 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:52:47,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:47,774 INFO L85 PathProgramCache]: Analyzing trace with hash -338193904, now seen corresponding path program 47 times [2021-10-28 08:52:47,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:47,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673322725] [2021-10-28 08:52:47,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:47,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:51,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:51,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673322725] [2021-10-28 08:52:51,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673322725] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:52:51,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040922430] [2021-10-28 08:52:51,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 08:52:51,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:52:51,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:52:51,729 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:52:51,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-28 08:52:54,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 101 check-sat command(s) [2021-10-28 08:52:54,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:52:54,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 205 conjunts are in the unsatisfiable core [2021-10-28 08:52:54,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:52:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:59,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040922430] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:52:59,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:52:59,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104] total 155 [2021-10-28 08:52:59,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910551536] [2021-10-28 08:52:59,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2021-10-28 08:52:59,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:59,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2021-10-28 08:52:59,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2858, Invalid=21012, Unknown=0, NotChecked=0, Total=23870 [2021-10-28 08:52:59,904 INFO L87 Difference]: Start difference. First operand 309 states and 360 transitions. Second operand has 155 states, 155 states have (on average 2.967741935483871) internal successors, (460), 155 states have internal predecessors, (460), 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 08:53:09,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:53:09,824 INFO L93 Difference]: Finished difference Result 4542 states and 5921 transitions. [2021-10-28 08:53:09,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-10-28 08:53:09,824 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.967741935483871) internal successors, (460), 155 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 308 [2021-10-28 08:53:09,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:53:09,846 INFO L225 Difference]: With dead ends: 4542 [2021-10-28 08:53:09,846 INFO L226 Difference]: Without dead ends: 4382 [2021-10-28 08:53:09,850 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 257 SyntacticMatches, 2 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7851 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2863, Invalid=21317, Unknown=0, NotChecked=0, Total=24180 [2021-10-28 08:53:09,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4382 states. [2021-10-28 08:53:11,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4382 to 4186. [2021-10-28 08:53:11,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4186 states, 4185 states have (on average 1.0241338112305853) internal successors, (4286), 4185 states have internal predecessors, (4286), 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 08:53:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4186 states to 4186 states and 4286 transitions. [2021-10-28 08:53:11,836 INFO L78 Accepts]: Start accepts. Automaton has 4186 states and 4286 transitions. Word has length 308 [2021-10-28 08:53:11,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:53:11,836 INFO L470 AbstractCegarLoop]: Abstraction has 4186 states and 4286 transitions. [2021-10-28 08:53:11,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 2.967741935483871) internal successors, (460), 155 states have internal predecessors, (460), 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 08:53:11,836 INFO L276 IsEmpty]: Start isEmpty. Operand 4186 states and 4286 transitions. [2021-10-28 08:53:11,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-10-28 08:53:11,838 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:53:11,838 INFO L513 BasicCegarLoop]: trace histogram [102, 101, 52, 50, 1, 1, 1, 1, 1, 1] [2021-10-28 08:53:11,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-10-28 08:53:12,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-28 08:53:12,039 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:53:12,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:53:12,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2103022405, now seen corresponding path program 48 times [2021-10-28 08:53:12,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:53:12,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012436085] [2021-10-28 08:53:12,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:53:12,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:53:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:53:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7403 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-10-28 08:53:13,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:53:13,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012436085] [2021-10-28 08:53:13,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012436085] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:53:13,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374038117] [2021-10-28 08:53:13,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 08:53:13,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:53:13,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:53:13,560 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:53:13,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-28 08:53:15,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 102 check-sat command(s) [2021-10-28 08:53:15,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:53:15,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 103 conjunts are in the unsatisfiable core [2021-10-28 08:53:15,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:53:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-10-28 08:53:16,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374038117] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:53:16,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:53:16,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 55 [2021-10-28 08:53:16,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782695093] [2021-10-28 08:53:16,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-28 08:53:16,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:53:16,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-28 08:53:16,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1484, Invalid=1486, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 08:53:16,808 INFO L87 Difference]: Start difference. First operand 4186 states and 4286 transitions. Second operand has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 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 08:53:17,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:53:17,217 INFO L93 Difference]: Finished difference Result 4337 states and 4437 transitions. [2021-10-28 08:53:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-28 08:53:17,219 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2021-10-28 08:53:17,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:53:17,220 INFO L225 Difference]: With dead ends: 4337 [2021-10-28 08:53:17,220 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 08:53:17,225 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1484, Invalid=1486, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 08:53:17,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 08:53:17,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 08:53:17,226 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 08:53:17,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 08:53:17,227 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 311 [2021-10-28 08:53:17,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:53:17,227 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 08:53:17,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 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 08:53:17,228 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 08:53:17,228 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 08:53:17,231 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:53:17,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-28 08:53:17,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:53:17,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 08:53:17,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:53:17,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:53:17,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:53:35,972 WARN L207 SmtUtils]: Spent 18.50 s on a formula simplification. DAG size of input: 2236 DAG size of output: 1660 [2021-10-28 08:54:27,612 WARN L207 SmtUtils]: Spent 51.60 s on a formula simplification. DAG size of input: 1611 DAG size of output: 458 [2021-10-28 08:54:27,629 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 08:54:27,629 INFO L857 garLoopResultBuilder]: For program point L29(lines 29 33) no Hoare annotation was computed. [2021-10-28 08:54:27,629 INFO L857 garLoopResultBuilder]: For program point L29-2(lines 28 36) no Hoare annotation was computed. [2021-10-28 08:54:27,630 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-28 08:54:27,630 INFO L860 garLoopResultBuilder]: At program point L38(lines 24 39) the Hoare annotation is: true [2021-10-28 08:54:27,630 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 08:54:27,630 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 08:54:27,631 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 08:54:27,632 INFO L853 garLoopResultBuilder]: At program point L28-2(lines 28 36) the Hoare annotation is: (let ((.cse10 (<= ULTIMATE.start_main_~y~0 44)) (.cse11 (<= 44 ULTIMATE.start_main_~y~0)) (.cse24 (<= ULTIMATE.start_main_~y~0 42)) (.cse25 (<= 42 ULTIMATE.start_main_~y~0)) (.cse22 (<= ULTIMATE.start_main_~y~0 22)) (.cse23 (<= 22 ULTIMATE.start_main_~y~0)) (.cse41 (<= 35 ULTIMATE.start_main_~y~0)) (.cse42 (<= ULTIMATE.start_main_~y~0 35)) (.cse59 (<= ULTIMATE.start_main_~y~0 39)) (.cse60 (<= 39 ULTIMATE.start_main_~y~0)) (.cse16 (<= ULTIMATE.start_main_~y~0 16)) (.cse17 (<= 16 ULTIMATE.start_main_~y~0)) (.cse6 (<= ULTIMATE.start_main_~y~0 37)) (.cse7 (<= 37 ULTIMATE.start_main_~y~0)) (.cse45 (<= 36 ULTIMATE.start_main_~y~0)) (.cse46 (<= ULTIMATE.start_main_~y~0 36)) (.cse37 (<= 32 ULTIMATE.start_main_~y~0)) (.cse38 (<= ULTIMATE.start_main_~y~0 32)) (.cse73 (<= 12 ULTIMATE.start_main_~y~0)) (.cse74 (<= ULTIMATE.start_main_~y~0 12)) (.cse8 (<= ULTIMATE.start_main_~y~0 46)) (.cse9 (<= 46 ULTIMATE.start_main_~y~0)) (.cse71 (<= 2 ULTIMATE.start_main_~y~0)) (.cse72 (<= ULTIMATE.start_main_~y~0 2)) (.cse65 (<= 11 ULTIMATE.start_main_~y~0)) (.cse66 (<= ULTIMATE.start_main_~y~0 11)) (.cse47 (<= 47 ULTIMATE.start_main_~y~0)) (.cse48 (<= ULTIMATE.start_main_~y~0 47)) (.cse49 (<= ULTIMATE.start_main_~y~0 33)) (.cse50 (<= 33 ULTIMATE.start_main_~y~0)) (.cse57 (<= 26 ULTIMATE.start_main_~y~0)) (.cse58 (<= ULTIMATE.start_main_~y~0 26)) (.cse12 (<= 41 ULTIMATE.start_main_~y~0)) (.cse13 (<= ULTIMATE.start_main_~y~0 41)) (.cse29 (<= 8 ULTIMATE.start_main_~y~0)) (.cse30 (<= ULTIMATE.start_main_~y~0 8)) (.cse77 (<= ULTIMATE.start_main_~y~0 45)) (.cse78 (<= 45 ULTIMATE.start_main_~y~0)) (.cse51 (<= ULTIMATE.start_main_~y~0 30)) (.cse52 (<= 30 ULTIMATE.start_main_~y~0)) (.cse39 (<= 15 ULTIMATE.start_main_~y~0)) (.cse40 (<= ULTIMATE.start_main_~y~0 15)) (.cse27 (<= 40 ULTIMATE.start_main_~y~0)) (.cse28 (<= ULTIMATE.start_main_~y~0 40)) (.cse2 (<= ULTIMATE.start_main_~y~0 20)) (.cse3 (<= 20 ULTIMATE.start_main_~y~0)) (.cse31 (<= 29 ULTIMATE.start_main_~y~0)) (.cse32 (<= ULTIMATE.start_main_~y~0 29)) (.cse20 (<= 10 ULTIMATE.start_main_~y~0)) (.cse21 (<= ULTIMATE.start_main_~y~0 10)) (.cse79 (<= 48 ULTIMATE.start_main_~y~0)) (.cse80 (<= ULTIMATE.start_main_~y~0 48)) (.cse35 (<= ULTIMATE.start_main_~y~0 4)) (.cse36 (<= 4 ULTIMATE.start_main_~y~0)) (.cse43 (<= 7 ULTIMATE.start_main_~y~0)) (.cse44 (<= ULTIMATE.start_main_~y~0 7)) (.cse61 (<= 25 ULTIMATE.start_main_~y~0)) (.cse62 (<= ULTIMATE.start_main_~y~0 25)) (.cse69 (<= 19 ULTIMATE.start_main_~y~0)) (.cse70 (<= ULTIMATE.start_main_~y~0 19)) (.cse85 (<= 1 ULTIMATE.start_main_~y~0)) (.cse86 (<= ULTIMATE.start_main_~y~0 1)) (.cse67 (<= 38 ULTIMATE.start_main_~y~0)) (.cse68 (<= ULTIMATE.start_main_~y~0 38)) (.cse63 (<= ULTIMATE.start_main_~y~0 14)) (.cse64 (<= 14 ULTIMATE.start_main_~y~0)) (.cse18 (<= ULTIMATE.start_main_~y~0 6)) (.cse19 (<= 6 ULTIMATE.start_main_~y~0)) (.cse53 (<= ULTIMATE.start_main_~y~0 21)) (.cse54 (<= 21 ULTIMATE.start_main_~y~0)) (.cse55 (<= 5 ULTIMATE.start_main_~y~0)) (.cse56 (<= ULTIMATE.start_main_~y~0 5)) (.cse4 (<= 9 ULTIMATE.start_main_~y~0)) (.cse5 (<= ULTIMATE.start_main_~y~0 9)) (.cse81 (<= 28 ULTIMATE.start_main_~y~0)) (.cse82 (<= ULTIMATE.start_main_~y~0 28)) (.cse89 (<= ULTIMATE.start_main_~y~0 34)) (.cse90 (<= 34 ULTIMATE.start_main_~y~0)) (.cse26 (= ULTIMATE.start_main_~y~0 0)) (.cse0 (<= ULTIMATE.start_main_~y~0 24)) (.cse1 (<= 24 ULTIMATE.start_main_~y~0)) (.cse93 (<= ULTIMATE.start_main_~y~0 23)) (.cse94 (<= 23 ULTIMATE.start_main_~y~0)) (.cse83 (<= 27 ULTIMATE.start_main_~y~0)) (.cse84 (<= ULTIMATE.start_main_~y~0 27)) (.cse33 (<= 18 ULTIMATE.start_main_~y~0)) (.cse34 (<= ULTIMATE.start_main_~y~0 18)) (.cse97 (<= ULTIMATE.start_main_~y~0 3)) (.cse98 (<= 3 ULTIMATE.start_main_~y~0)) (.cse91 (<= ULTIMATE.start_main_~y~0 49)) (.cse92 (<= 49 ULTIMATE.start_main_~y~0)) (.cse14 (<= ULTIMATE.start_main_~y~0 13)) (.cse15 (<= 13 ULTIMATE.start_main_~y~0)) (.cse87 (<= ULTIMATE.start_main_~y~0 17)) (.cse88 (<= 17 ULTIMATE.start_main_~y~0)) (.cse95 (<= ULTIMATE.start_main_~y~0 31)) (.cse96 (<= 31 ULTIMATE.start_main_~y~0)) (.cse75 (<= 43 ULTIMATE.start_main_~y~0)) (.cse76 (<= ULTIMATE.start_main_~y~0 43))) (or (and .cse0 .cse1 (= ULTIMATE.start_main_~x~0 24)) (and (= ULTIMATE.start_main_~x~0 20) .cse2 .cse3) (and .cse4 (= ULTIMATE.start_main_~x~0 9) .cse5) (and (<= ULTIMATE.start_main_~x~0 63) .cse6 .cse7 (<= 63 ULTIMATE.start_main_~x~0)) (and .cse8 (= ULTIMATE.start_main_~x~0 46) .cse9) (and (= ULTIMATE.start_main_~x~0 44) .cse10 .cse11) (and (= 41 ULTIMATE.start_main_~x~0) .cse12 .cse13) (and .cse14 (<= ULTIMATE.start_main_~x~0 87) .cse15 (<= 87 ULTIMATE.start_main_~x~0)) (and .cse16 .cse17 (= ULTIMATE.start_main_~x~0 16)) (and .cse18 (= ULTIMATE.start_main_~x~0 6) .cse19) (and (<= 56 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 56) .cse10 .cse11) (and .cse20 (<= 90 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 90) .cse21) (and .cse22 (<= 78 ULTIMATE.start_main_~x~0) .cse23 (<= ULTIMATE.start_main_~x~0 78)) (and .cse24 .cse25 (= ULTIMATE.start_main_~x~0 42)) (and .cse26 (= ULTIMATE.start_main_~x~0 0)) (and .cse24 .cse25 (<= 58 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 58)) (and .cse27 .cse28 (<= ULTIMATE.start_main_~x~0 60) (<= 60 ULTIMATE.start_main_~x~0)) (and (= ULTIMATE.start_main_~x~0 8) .cse29 .cse30) (and .cse31 .cse32 (= ULTIMATE.start_main_~x~0 29)) (and (<= ULTIMATE.start_main_~x~0 82) .cse33 .cse34 (<= 82 ULTIMATE.start_main_~x~0)) (and (<= 96 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 96) .cse35 .cse36) (and .cse37 (= ULTIMATE.start_main_~x~0 32) .cse38) (and .cse39 .cse40 (= ULTIMATE.start_main_~x~0 15)) (and .cse41 .cse42 (<= ULTIMATE.start_main_~x~0 65) (<= 65 ULTIMATE.start_main_~x~0)) (and .cse43 .cse44 (= ULTIMATE.start_main_~x~0 7)) (and (= ULTIMATE.start_main_~x~0 36) .cse45 .cse46) (and .cse47 (= ULTIMATE.start_main_~x~0 47) .cse48) (and .cse49 (<= 67 ULTIMATE.start_main_~x~0) .cse50 (<= ULTIMATE.start_main_~x~0 67)) (and .cse51 .cse52 (= ULTIMATE.start_main_~x~0 30)) (and .cse22 .cse23 (= ULTIMATE.start_main_~x~0 22)) (and (= ULTIMATE.start_main_~x~0 35) .cse41 .cse42) (and .cse53 (<= ULTIMATE.start_main_~x~0 79) .cse54 (<= 79 ULTIMATE.start_main_~x~0)) (and (= ULTIMATE.start_main_~x~0 5) .cse55 .cse56) (and (= ULTIMATE.start_main_~x~0 26) .cse57 .cse58) (and (<= 61 ULTIMATE.start_main_~x~0) .cse59 (<= ULTIMATE.start_main_~x~0 61) .cse60) (and .cse61 (= ULTIMATE.start_main_~x~0 25) .cse62) (and (= ULTIMATE.start_main_~x~0 39) .cse59 .cse60) (and .cse16 .cse17 (<= ULTIMATE.start_main_~x~0 84) (<= 84 ULTIMATE.start_main_~x~0)) (and .cse63 (<= 86 ULTIMATE.start_main_~x~0) .cse64 (<= ULTIMATE.start_main_~x~0 86)) (and .cse6 (= ULTIMATE.start_main_~x~0 37) .cse7) (and .cse65 (= ULTIMATE.start_main_~x~0 11) .cse66) (and .cse67 (<= ULTIMATE.start_main_~x~0 62) .cse68 (<= 62 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 64) (<= 64 ULTIMATE.start_main_~x~0) .cse45 .cse46) (and (<= 68 ULTIMATE.start_main_~x~0) .cse37 (<= ULTIMATE.start_main_~x~0 68) .cse38) (and (<= 81 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 81) .cse69 .cse70) (and .cse71 .cse72 (= ULTIMATE.start_main_~x~0 2)) (and .cse73 .cse74 (= ULTIMATE.start_main_~x~0 12)) (and .cse73 .cse74 (<= 88 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 88)) (and (<= 54 ULTIMATE.start_main_~x~0) .cse8 (<= ULTIMATE.start_main_~x~0 54) .cse9) (and .cse71 .cse72 (<= 98 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 98)) (and (= ULTIMATE.start_main_~x~0 43) .cse75 .cse76) (and (<= ULTIMATE.start_main_~x~0 55) .cse77 .cse78 (<= 55 ULTIMATE.start_main_~x~0)) (and .cse65 (<= 89 ULTIMATE.start_main_~x~0) .cse66 (<= ULTIMATE.start_main_~x~0 89)) (and .cse47 (<= ULTIMATE.start_main_~x~0 53) (<= 53 ULTIMATE.start_main_~x~0) .cse48) (and .cse79 .cse80 (= ULTIMATE.start_main_~x~0 48)) (and (= ULTIMATE.start_main_~x~0 33) .cse49 .cse50) (and (<= 74 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 74) .cse57 .cse58) (and .cse81 (<= ULTIMATE.start_main_~x~0 72) .cse82 (<= 72 ULTIMATE.start_main_~x~0)) (and .cse12 (<= 59 ULTIMATE.start_main_~x~0) .cse13 (<= ULTIMATE.start_main_~x~0 59)) (and (<= ULTIMATE.start_main_~x~0 92) .cse29 (<= 92 ULTIMATE.start_main_~x~0) .cse30) (and .cse77 (= ULTIMATE.start_main_~x~0 45) .cse78) (and .cse83 .cse84 (= ULTIMATE.start_main_~x~0 27)) (and (<= 70 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 70) .cse51 .cse52) (and .cse39 .cse40 (<= ULTIMATE.start_main_~x~0 85) (<= 85 ULTIMATE.start_main_~x~0)) (and .cse27 .cse28 (= 40 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 99) (<= 99 ULTIMATE.start_main_~x~0) .cse85 .cse86) (and (<= ULTIMATE.start_main_~x~0 80) .cse2 .cse3 (<= 80 ULTIMATE.start_main_~x~0)) (and (<= 71 ULTIMATE.start_main_~x~0) .cse31 .cse32 (<= ULTIMATE.start_main_~x~0 71)) (and .cse20 (= ULTIMATE.start_main_~x~0 10) .cse21) (and .cse79 (<= 52 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 52) .cse80) (and .cse87 (= ULTIMATE.start_main_~x~0 17) .cse88) (and .cse89 (= ULTIMATE.start_main_~x~0 34) .cse90) (and (= ULTIMATE.start_main_~x~0 4) .cse35 .cse36) (and (<= ULTIMATE.start_main_~x~0 93) .cse43 .cse44 (<= 93 ULTIMATE.start_main_~x~0)) (and .cse61 (<= 75 ULTIMATE.start_main_~x~0) .cse62 (<= ULTIMATE.start_main_~x~0 75)) (and (= 19 ULTIMATE.start_main_~x~0) .cse69 .cse70) (and (= ULTIMATE.start_main_~x~0 1) .cse85 .cse86) (and .cse67 (= ULTIMATE.start_main_~x~0 38) .cse68) (and .cse63 .cse64 (= ULTIMATE.start_main_~x~0 14)) (and .cse18 (<= 94 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 94) .cse19) (and .cse53 .cse54 (= ULTIMATE.start_main_~x~0 21)) (and .cse91 .cse92 (= ULTIMATE.start_main_~x~0 49)) (and (= 23 ULTIMATE.start_main_~x~0) .cse93 .cse94) (and .cse55 .cse56 (<= 95 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 95)) (and (<= ULTIMATE.start_main_~x~0 69) .cse95 (<= 69 ULTIMATE.start_main_~x~0) .cse96) (and (<= ULTIMATE.start_main_~x~0 91) .cse4 (<= 91 ULTIMATE.start_main_~x~0) .cse5) (and .cse81 .cse82 (= ULTIMATE.start_main_~x~0 28)) (and (= ULTIMATE.start_main_~x~0 3) .cse97 .cse98) (and .cse89 (<= 66 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 66) .cse90) (and .cse26 (< 99 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 100)) (and .cse0 .cse1 (<= ULTIMATE.start_main_~x~0 76) (<= 76 ULTIMATE.start_main_~x~0)) (and .cse93 (<= 77 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 77) .cse94) (and .cse83 (<= 73 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 73) .cse84) (and .cse33 .cse34 (= ULTIMATE.start_main_~x~0 18)) (and .cse97 (<= ULTIMATE.start_main_~x~0 97) .cse98 (<= 97 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 50) (<= 50 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 50) (<= 50 ULTIMATE.start_main_~x~0)) (and .cse91 (<= ULTIMATE.start_main_~x~0 51) .cse92 (<= 51 ULTIMATE.start_main_~x~0)) (and .cse14 .cse15 (= ULTIMATE.start_main_~x~0 13)) (and .cse87 .cse88 (<= 83 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 83)) (and .cse95 (= ULTIMATE.start_main_~x~0 31) .cse96) (and (<= 57 ULTIMATE.start_main_~x~0) .cse75 .cse76 (<= ULTIMATE.start_main_~x~0 57)))) [2021-10-28 08:54:27,633 INFO L857 garLoopResultBuilder]: For program point L28-3(lines 28 36) no Hoare annotation was computed. [2021-10-28 08:54:27,633 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-28 08:54:27,634 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-10-28 08:54:27,634 INFO L860 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-10-28 08:54:27,638 INFO L731 BasicCegarLoop]: Path program histogram: [48, 1, 1, 1] [2021-10-28 08:54:27,640 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:54:27,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:54:27 BoogieIcfgContainer [2021-10-28 08:54:27,691 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:54:27,692 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:54:27,692 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:54:27,692 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:54:27,693 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:50:44" (3/4) ... [2021-10-28 08:54:27,710 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 08:54:27,723 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-28 08:54:27,723 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 08:54:27,724 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 08:54:27,724 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 08:54:27,788 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 08:54:27,789 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:54:27,790 INFO L168 Benchmark]: Toolchain (without parser) took 223669.12 ms. Allocated memory was 104.9 MB in the beginning and 1.8 GB in the end (delta: 1.7 GB). Free memory was 65.9 MB in the beginning and 1.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 660.9 MB. Max. memory is 16.1 GB. [2021-10-28 08:54:27,790 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 104.9 MB. Free memory is still 82.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:54:27,791 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.22 ms. Allocated memory is still 104.9 MB. Free memory was 65.7 MB in the beginning and 80.5 MB in the end (delta: -14.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:54:27,791 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.41 ms. Allocated memory is still 104.9 MB. Free memory was 80.5 MB in the beginning and 79.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:54:27,791 INFO L168 Benchmark]: Boogie Preprocessor took 29.26 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 78.4 MB in the end (delta: 805.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:54:27,792 INFO L168 Benchmark]: RCFGBuilder took 291.56 ms. Allocated memory is still 104.9 MB. Free memory was 78.0 MB in the beginning and 69.1 MB in the end (delta: 8.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:54:27,792 INFO L168 Benchmark]: TraceAbstraction took 222872.45 ms. Allocated memory was 104.9 MB in the beginning and 1.8 GB in the end (delta: 1.7 GB). Free memory was 68.7 MB in the beginning and 1.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.6 GB. Max. memory is 16.1 GB. [2021-10-28 08:54:27,793 INFO L168 Benchmark]: Witness Printer took 96.88 ms. Allocated memory is still 1.8 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:54:27,795 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 104.9 MB. Free memory is still 82.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 335.22 ms. Allocated memory is still 104.9 MB. Free memory was 65.7 MB in the beginning and 80.5 MB in the end (delta: -14.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.41 ms. Allocated memory is still 104.9 MB. Free memory was 80.5 MB in the beginning and 79.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.26 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 78.4 MB in the end (delta: 805.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 291.56 ms. Allocated memory is still 104.9 MB. Free memory was 78.0 MB in the beginning and 69.1 MB in the end (delta: 8.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 222872.45 ms. Allocated memory was 104.9 MB in the beginning and 1.8 GB in the end (delta: 1.7 GB). Free memory was 68.7 MB in the beginning and 1.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.6 GB. Max. memory is 16.1 GB. * Witness Printer took 96.88 ms. Allocated memory is still 1.8 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: 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 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 222.7s, OverallIterations: 51, TraceHistogramMax: 102, PathProgramHistogramMax: 48, EmptinessCheckTime: 0.0s, AutomataDifference: 28.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 70.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 987 SDtfs, 1492 SDslu, 20603 SDs, 0 SdLazy, 26193 SolverSat, 2170 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10159 GetRequests, 7669 SyntacticMatches, 2 SemanticMatches, 2488 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59581 ImplicationChecksByTransitivity, 46.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4186occurred in iteration=50, InterpolantAutomatonStates: 2196, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.4s AutomataMinimizationTime, 51 MinimizatonAttempts, 3770 StatesRemovedByMinimization, 48 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 106 NumberOfFragments, 1160 HoareAnnotationTreeSize, 3 FomulaSimplifications, 1294097411 FormulaSimplificationTreeSizeReduction, 18.5s HoareSimplificationTime, 3 FomulaSimplificationsInter, 141278450 FormulaSimplificationTreeSizeReductionInter, 51.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 5.0s SatisfiabilityAnalysisTime, 64.8s InterpolantComputationTime, 15850 NumberOfCodeBlocks, 15847 NumberOfCodeBlocksAsserted, 1415 NumberOfCheckSat, 15751 ConstructedInterpolants, 0 QuantifiedInterpolants, 36654 SizeOfPredicates, 2 NumberOfNonLiveVariables, 19531 ConjunctsInSsa, 1941 ConjunctsInUnsatCore, 99 InterpolantComputations, 3 PerfectInterpolantSequences, 343184/532878 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 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((y <= 24 && 24 <= y) && x == 24) || ((x == 20 && y <= 20) && 20 <= y)) || ((9 <= y && x == 9) && y <= 9)) || (((x <= 63 && y <= 37) && 37 <= y) && 63 <= x)) || ((y <= 46 && x == 46) && 46 <= y)) || ((x == 44 && y <= 44) && 44 <= y)) || ((41 == x && 41 <= y) && y <= 41)) || (((y <= 13 && x <= 87) && 13 <= y) && 87 <= x)) || ((y <= 16 && 16 <= y) && x == 16)) || ((y <= 6 && x == 6) && 6 <= y)) || (((56 <= x && x <= 56) && y <= 44) && 44 <= y)) || (((10 <= y && 90 <= x) && x <= 90) && y <= 10)) || (((y <= 22 && 78 <= x) && 22 <= y) && x <= 78)) || ((y <= 42 && 42 <= y) && x == 42)) || (y == 0 && x == 0)) || (((y <= 42 && 42 <= y) && 58 <= x) && x <= 58)) || (((40 <= y && y <= 40) && x <= 60) && 60 <= x)) || ((x == 8 && 8 <= y) && y <= 8)) || ((29 <= y && y <= 29) && x == 29)) || (((x <= 82 && 18 <= y) && y <= 18) && 82 <= x)) || (((96 <= x && x <= 96) && y <= 4) && 4 <= y)) || ((32 <= y && x == 32) && y <= 32)) || ((15 <= y && y <= 15) && x == 15)) || (((35 <= y && y <= 35) && x <= 65) && 65 <= x)) || ((7 <= y && y <= 7) && x == 7)) || ((x == 36 && 36 <= y) && y <= 36)) || ((47 <= y && x == 47) && y <= 47)) || (((y <= 33 && 67 <= x) && 33 <= y) && x <= 67)) || ((y <= 30 && 30 <= y) && x == 30)) || ((y <= 22 && 22 <= y) && x == 22)) || ((x == 35 && 35 <= y) && y <= 35)) || (((y <= 21 && x <= 79) && 21 <= y) && 79 <= x)) || ((x == 5 && 5 <= y) && y <= 5)) || ((x == 26 && 26 <= y) && y <= 26)) || (((61 <= x && y <= 39) && x <= 61) && 39 <= y)) || ((25 <= y && x == 25) && y <= 25)) || ((x == 39 && y <= 39) && 39 <= y)) || (((y <= 16 && 16 <= y) && x <= 84) && 84 <= x)) || (((y <= 14 && 86 <= x) && 14 <= y) && x <= 86)) || ((y <= 37 && x == 37) && 37 <= y)) || ((11 <= y && x == 11) && y <= 11)) || (((38 <= y && x <= 62) && y <= 38) && 62 <= x)) || (((x <= 64 && 64 <= x) && 36 <= y) && y <= 36)) || (((68 <= x && 32 <= y) && x <= 68) && y <= 32)) || (((81 <= x && x <= 81) && 19 <= y) && y <= 19)) || ((2 <= y && y <= 2) && x == 2)) || ((12 <= y && y <= 12) && x == 12)) || (((12 <= y && y <= 12) && 88 <= x) && x <= 88)) || (((54 <= x && y <= 46) && x <= 54) && 46 <= y)) || (((2 <= y && y <= 2) && 98 <= x) && x <= 98)) || ((x == 43 && 43 <= y) && y <= 43)) || (((x <= 55 && y <= 45) && 45 <= y) && 55 <= x)) || (((11 <= y && 89 <= x) && y <= 11) && x <= 89)) || (((47 <= y && x <= 53) && 53 <= x) && y <= 47)) || ((48 <= y && y <= 48) && x == 48)) || ((x == 33 && y <= 33) && 33 <= y)) || (((74 <= x && x <= 74) && 26 <= y) && y <= 26)) || (((28 <= y && x <= 72) && y <= 28) && 72 <= x)) || (((41 <= y && 59 <= x) && y <= 41) && x <= 59)) || (((x <= 92 && 8 <= y) && 92 <= x) && y <= 8)) || ((y <= 45 && x == 45) && 45 <= y)) || ((27 <= y && y <= 27) && x == 27)) || (((70 <= x && x <= 70) && y <= 30) && 30 <= y)) || (((15 <= y && y <= 15) && x <= 85) && 85 <= x)) || ((40 <= y && y <= 40) && 40 == x)) || (((x <= 99 && 99 <= x) && 1 <= y) && y <= 1)) || (((x <= 80 && y <= 20) && 20 <= y) && 80 <= x)) || (((71 <= x && 29 <= y) && y <= 29) && x <= 71)) || ((10 <= y && x == 10) && y <= 10)) || (((48 <= y && 52 <= x) && x <= 52) && y <= 48)) || ((y <= 17 && x == 17) && 17 <= y)) || ((y <= 34 && x == 34) && 34 <= y)) || ((x == 4 && y <= 4) && 4 <= y)) || (((x <= 93 && 7 <= y) && y <= 7) && 93 <= x)) || (((25 <= y && 75 <= x) && y <= 25) && x <= 75)) || ((19 == x && 19 <= y) && y <= 19)) || ((x == 1 && 1 <= y) && y <= 1)) || ((38 <= y && x == 38) && y <= 38)) || ((y <= 14 && 14 <= y) && x == 14)) || (((y <= 6 && 94 <= x) && x <= 94) && 6 <= y)) || ((y <= 21 && 21 <= y) && x == 21)) || ((y <= 49 && 49 <= y) && x == 49)) || ((23 == x && y <= 23) && 23 <= y)) || (((5 <= y && y <= 5) && 95 <= x) && x <= 95)) || (((x <= 69 && y <= 31) && 69 <= x) && 31 <= y)) || (((x <= 91 && 9 <= y) && 91 <= x) && y <= 9)) || ((28 <= y && y <= 28) && x == 28)) || ((x == 3 && y <= 3) && 3 <= y)) || (((y <= 34 && 66 <= x) && x <= 66) && 34 <= y)) || ((y == 0 && 99 < x) && x <= 100)) || (((y <= 24 && 24 <= y) && x <= 76) && 76 <= x)) || (((y <= 23 && 77 <= x) && x <= 77) && 23 <= y)) || (((27 <= y && 73 <= x) && x <= 73) && y <= 27)) || ((18 <= y && y <= 18) && x == 18)) || (((y <= 3 && x <= 97) && 3 <= y) && 97 <= x)) || (((x <= 50 && 50 <= y) && y <= 50) && 50 <= x)) || (((y <= 49 && x <= 51) && 49 <= y) && 51 <= x)) || ((y <= 13 && 13 <= y) && x == 13)) || (((y <= 17 && 17 <= y) && 83 <= x) && x <= 83)) || ((y <= 31 && x == 31) && 31 <= y)) || (((57 <= x && 43 <= y) && y <= 43) && x <= 57) RESULT: Ultimate proved your program to be correct! [2021-10-28 08:54:27,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a375f60-77bf-49f1-8721-520631a5feb3/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...