./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/toy1.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/toy1.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y --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 c40ed6d21fe4d61cae011269f1fdb95d05149cea0f3470f42c6e8f2fc8fb0d6a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:27:25,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:27:25,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:27:25,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:27:25,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:27:25,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:27:25,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:27:25,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:27:25,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:27:25,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:27:25,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:27:25,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:27:25,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:27:25,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:27:25,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:27:25,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:27:25,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:27:25,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:27:25,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:27:25,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:27:25,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:27:25,521 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:27:25,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:27:25,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:27:25,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:27:25,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:27:25,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:27:25,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:27:25,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:27:25,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:27:25,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:27:25,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:27:25,545 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:27:25,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:27:25,548 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:27:25,548 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:27:25,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:27:25,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:27:25,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:27:25,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:27:25,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:27:25,553 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:27:25,597 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:27:25,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:27:25,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:27:25,598 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:27:25,605 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:27:25,606 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:27:25,606 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:27:25,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:27:25,606 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:27:25,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:27:25,607 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:27:25,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:27:25,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:27:25,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:27:25,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:27:25,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:27:25,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:27:25,608 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:27:25,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:27:25,608 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:27:25,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:27:25,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:27:25,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:27:25,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:27:25,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:27:25,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:27:25,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:27:25,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:27:25,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:27:25,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:27:25,610 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:27:25,610 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:27:25,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:27:25,610 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:27:25,611 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_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c40ed6d21fe4d61cae011269f1fdb95d05149cea0f3470f42c6e8f2fc8fb0d6a [2021-11-13 18:27:25,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:27:25,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:27:25,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:27:25,986 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:27:25,987 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:27:25,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/systemc/toy1.cil.c [2021-11-13 18:27:26,068 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/data/160a74487/578f3467cb634acc82a4c8555bc22b2b/FLAG905589064 [2021-11-13 18:27:26,787 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:27:26,788 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/sv-benchmarks/c/systemc/toy1.cil.c [2021-11-13 18:27:26,809 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/data/160a74487/578f3467cb634acc82a4c8555bc22b2b/FLAG905589064 [2021-11-13 18:27:27,087 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/data/160a74487/578f3467cb634acc82a4c8555bc22b2b [2021-11-13 18:27:27,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:27:27,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:27:27,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:27:27,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:27:27,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:27:27,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:27:27" (1/1) ... [2021-11-13 18:27:27,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ea14aa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:27, skipping insertion in model container [2021-11-13 18:27:27,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:27:27" (1/1) ... [2021-11-13 18:27:27,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:27:27,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:27:27,356 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_648041ce-5d13-4b83-bd52-dc10bafb3038/sv-benchmarks/c/systemc/toy1.cil.c[698,711] [2021-11-13 18:27:27,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:27:27,452 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:27:27,464 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_648041ce-5d13-4b83-bd52-dc10bafb3038/sv-benchmarks/c/systemc/toy1.cil.c[698,711] [2021-11-13 18:27:27,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:27:27,525 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:27:27,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:27 WrapperNode [2021-11-13 18:27:27,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:27:27,527 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:27:27,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:27:27,528 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:27:27,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:27" (1/1) ... [2021-11-13 18:27:27,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:27" (1/1) ... [2021-11-13 18:27:27,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:27:27,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:27:27,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:27:27,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:27:27,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:27" (1/1) ... [2021-11-13 18:27:27,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:27" (1/1) ... [2021-11-13 18:27:27,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:27" (1/1) ... [2021-11-13 18:27:27,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:27" (1/1) ... [2021-11-13 18:27:27,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:27" (1/1) ... [2021-11-13 18:27:27,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:27" (1/1) ... [2021-11-13 18:27:27,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:27" (1/1) ... [2021-11-13 18:27:27,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:27:27,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:27:27,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:27:27,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:27:27,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:27" (1/1) ... [2021-11-13 18:27:27,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:27:27,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:27:27,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:27:27,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:27:27,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:27:27,778 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-13 18:27:27,778 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-13 18:27:27,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:27:27,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:27:27,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:27:28,403 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:27:28,403 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-13 18:27:28,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:27:28 BoogieIcfgContainer [2021-11-13 18:27:28,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:27:28,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:27:28,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:27:28,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:27:28,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:27:27" (1/3) ... [2021-11-13 18:27:28,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79aa355a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:27:28, skipping insertion in model container [2021-11-13 18:27:28,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:27" (2/3) ... [2021-11-13 18:27:28,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79aa355a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:27:28, skipping insertion in model container [2021-11-13 18:27:28,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:27:28" (3/3) ... [2021-11-13 18:27:28,425 INFO L111 eAbstractionObserver]: Analyzing ICFG toy1.cil.c [2021-11-13 18:27:28,431 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:27:28,432 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:27:28,504 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:27:28,513 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 [2021-11-13 18:27:28,514 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:27:28,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 136 states, 131 states have (on average 1.8396946564885497) internal successors, (241), 134 states have internal predecessors, (241), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:27:28,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:27:28,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:28,573 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:28,574 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:28,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:28,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1999309542, now seen corresponding path program 1 times [2021-11-13 18:27:28,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:28,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794259506] [2021-11-13 18:27:28,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:28,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:28,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:28,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:28,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794259506] [2021-11-13 18:27:28,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794259506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:28,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:28,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:28,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678481401] [2021-11-13 18:27:28,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:28,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:28,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:28,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:28,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:28,941 INFO L87 Difference]: Start difference. First operand has 136 states, 131 states have (on average 1.8396946564885497) internal successors, (241), 134 states have internal predecessors, (241), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:29,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:29,000 INFO L93 Difference]: Finished difference Result 262 states and 476 transitions. [2021-11-13 18:27:29,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:29,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:27:29,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:29,015 INFO L225 Difference]: With dead ends: 262 [2021-11-13 18:27:29,015 INFO L226 Difference]: Without dead ends: 130 [2021-11-13 18:27:29,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:29,023 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 223 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.05ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.95ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:29,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 227 Invalid, 2 Unknown, 0 Unchecked, 5.05ms Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 6.95ms Time] [2021-11-13 18:27:29,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-13 18:27:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-13 18:27:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 127 states have (on average 1.7480314960629921) internal successors, (222), 128 states have internal predecessors, (222), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:29,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 224 transitions. [2021-11-13 18:27:29,073 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 224 transitions. Word has length 37 [2021-11-13 18:27:29,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:29,073 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 224 transitions. [2021-11-13 18:27:29,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:29,074 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 224 transitions. [2021-11-13 18:27:29,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:27:29,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:29,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:29,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:27:29,077 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:29,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:29,078 INFO L85 PathProgramCache]: Analyzing trace with hash 2020898140, now seen corresponding path program 1 times [2021-11-13 18:27:29,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:29,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682526553] [2021-11-13 18:27:29,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:29,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:29,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:29,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682526553] [2021-11-13 18:27:29,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682526553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:29,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:29,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:27:29,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465040954] [2021-11-13 18:27:29,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:29,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:29,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:29,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:29,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:29,160 INFO L87 Difference]: Start difference. First operand 130 states and 224 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:29,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:29,259 INFO L93 Difference]: Finished difference Result 352 states and 604 transitions. [2021-11-13 18:27:29,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:27:29,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:27:29,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:29,279 INFO L225 Difference]: With dead ends: 352 [2021-11-13 18:27:29,280 INFO L226 Difference]: Without dead ends: 225 [2021-11-13 18:27:29,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:27:29,298 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 582 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.83ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.71ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:29,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 376 Invalid, 18 Unknown, 0 Unchecked, 8.83ms Time], IncrementalHoareTripleChecker [9 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 34.71ms Time] [2021-11-13 18:27:29,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-13 18:27:29,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 220. [2021-11-13 18:27:29,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 217 states have (on average 1.728110599078341) internal successors, (375), 218 states have internal predecessors, (375), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:29,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 377 transitions. [2021-11-13 18:27:29,331 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 377 transitions. Word has length 37 [2021-11-13 18:27:29,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:29,332 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 377 transitions. [2021-11-13 18:27:29,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:29,332 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 377 transitions. [2021-11-13 18:27:29,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:27:29,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:29,335 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:29,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:27:29,335 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:29,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:29,336 INFO L85 PathProgramCache]: Analyzing trace with hash 2043530394, now seen corresponding path program 1 times [2021-11-13 18:27:29,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:29,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048468843] [2021-11-13 18:27:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:29,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:29,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:29,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048468843] [2021-11-13 18:27:29,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048468843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:29,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:29,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:29,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280236072] [2021-11-13 18:27:29,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:29,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:29,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:29,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:29,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:29,396 INFO L87 Difference]: Start difference. First operand 220 states and 377 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:29,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:29,459 INFO L93 Difference]: Finished difference Result 431 states and 741 transitions. [2021-11-13 18:27:29,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:29,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:27:29,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:29,464 INFO L225 Difference]: With dead ends: 431 [2021-11-13 18:27:29,479 INFO L226 Difference]: Without dead ends: 220 [2021-11-13 18:27:29,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:29,483 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 193 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.49ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.16ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:29,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 207 Invalid, 22 Unknown, 0 Unchecked, 2.49ms Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 28.16ms Time] [2021-11-13 18:27:29,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-13 18:27:29,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2021-11-13 18:27:29,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 217 states have (on average 1.672811059907834) internal successors, (363), 218 states have internal predecessors, (363), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 365 transitions. [2021-11-13 18:27:29,573 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 365 transitions. Word has length 37 [2021-11-13 18:27:29,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:29,574 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 365 transitions. [2021-11-13 18:27:29,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:29,574 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 365 transitions. [2021-11-13 18:27:29,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:27:29,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:29,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:29,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:27:29,577 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:29,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:29,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1841385886, now seen corresponding path program 1 times [2021-11-13 18:27:29,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:29,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670998061] [2021-11-13 18:27:29,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:29,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:29,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:29,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670998061] [2021-11-13 18:27:29,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670998061] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:29,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:29,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:27:29,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573345604] [2021-11-13 18:27:29,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:29,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:29,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:29,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:29,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:29,643 INFO L87 Difference]: Start difference. First operand 220 states and 365 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:29,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:29,820 INFO L93 Difference]: Finished difference Result 601 states and 998 transitions. [2021-11-13 18:27:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:27:29,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:27:29,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:29,830 INFO L225 Difference]: With dead ends: 601 [2021-11-13 18:27:29,830 INFO L226 Difference]: Without dead ends: 391 [2021-11-13 18:27:29,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:27:29,834 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 375 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.21ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.36ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:29,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 468 Invalid, 69 Unknown, 0 Unchecked, 14.21ms Time], IncrementalHoareTripleChecker [11 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 113.36ms Time] [2021-11-13 18:27:29,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-13 18:27:29,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 220. [2021-11-13 18:27:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 217 states have (on average 1.6589861751152073) internal successors, (360), 218 states have internal predecessors, (360), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 362 transitions. [2021-11-13 18:27:29,885 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 362 transitions. Word has length 37 [2021-11-13 18:27:29,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:29,886 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 362 transitions. [2021-11-13 18:27:29,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:29,886 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 362 transitions. [2021-11-13 18:27:29,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:27:29,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:29,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:29,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:27:29,896 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:29,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:29,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1331912796, now seen corresponding path program 1 times [2021-11-13 18:27:29,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:29,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42934032] [2021-11-13 18:27:29,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:29,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:30,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:30,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42934032] [2021-11-13 18:27:30,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42934032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:30,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:30,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:27:30,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967360531] [2021-11-13 18:27:30,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:30,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:30,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:30,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:30,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:30,008 INFO L87 Difference]: Start difference. First operand 220 states and 362 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:30,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:30,118 INFO L93 Difference]: Finished difference Result 602 states and 992 transitions. [2021-11-13 18:27:30,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:27:30,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:27:30,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:30,121 INFO L225 Difference]: With dead ends: 602 [2021-11-13 18:27:30,122 INFO L226 Difference]: Without dead ends: 393 [2021-11-13 18:27:30,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:27:30,136 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 373 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.92ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.39ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:30,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 475 Invalid, 61 Unknown, 0 Unchecked, 4.92ms Time], IncrementalHoareTripleChecker [9 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 62.39ms Time] [2021-11-13 18:27:30,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-13 18:27:30,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 220. [2021-11-13 18:27:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 217 states have (on average 1.6451612903225807) internal successors, (357), 218 states have internal predecessors, (357), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:30,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 359 transitions. [2021-11-13 18:27:30,165 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 359 transitions. Word has length 37 [2021-11-13 18:27:30,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:30,166 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 359 transitions. [2021-11-13 18:27:30,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:30,166 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 359 transitions. [2021-11-13 18:27:30,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:27:30,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:30,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:30,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:27:30,168 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:30,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:30,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1039826466, now seen corresponding path program 1 times [2021-11-13 18:27:30,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:30,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4098202] [2021-11-13 18:27:30,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:30,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:30,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:30,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4098202] [2021-11-13 18:27:30,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4098202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:30,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:30,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:27:30,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513330703] [2021-11-13 18:27:30,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:30,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:30,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:30,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:30,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:30,227 INFO L87 Difference]: Start difference. First operand 220 states and 359 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:30,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:30,326 INFO L93 Difference]: Finished difference Result 616 states and 1005 transitions. [2021-11-13 18:27:30,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:27:30,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:27:30,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:30,330 INFO L225 Difference]: With dead ends: 616 [2021-11-13 18:27:30,331 INFO L226 Difference]: Without dead ends: 408 [2021-11-13 18:27:30,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:27:30,340 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 379 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.22ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:30,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 485 Invalid, 58 Unknown, 0 Unchecked, 3.22ms Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 57.65ms Time] [2021-11-13 18:27:30,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-11-13 18:27:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 226. [2021-11-13 18:27:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 223 states have (on average 1.6188340807174888) internal successors, (361), 224 states have internal predecessors, (361), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:30,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 363 transitions. [2021-11-13 18:27:30,367 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 363 transitions. Word has length 37 [2021-11-13 18:27:30,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:30,368 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 363 transitions. [2021-11-13 18:27:30,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:30,368 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 363 transitions. [2021-11-13 18:27:30,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:27:30,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:30,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:30,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:27:30,371 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:30,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:30,372 INFO L85 PathProgramCache]: Analyzing trace with hash -977786852, now seen corresponding path program 1 times [2021-11-13 18:27:30,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:30,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445748269] [2021-11-13 18:27:30,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:30,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:30,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:30,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445748269] [2021-11-13 18:27:30,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445748269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:30,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:30,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:27:30,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257801549] [2021-11-13 18:27:30,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:30,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:30,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:30,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:30,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:30,426 INFO L87 Difference]: Start difference. First operand 226 states and 363 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:30,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:30,543 INFO L93 Difference]: Finished difference Result 775 states and 1243 transitions. [2021-11-13 18:27:30,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:27:30,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:27:30,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:30,550 INFO L225 Difference]: With dead ends: 775 [2021-11-13 18:27:30,550 INFO L226 Difference]: Without dead ends: 562 [2021-11-13 18:27:30,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:27:30,553 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 375 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.60ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.78ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:30,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 583 Invalid, 66 Unknown, 0 Unchecked, 3.60ms Time], IncrementalHoareTripleChecker [10 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 66.78ms Time] [2021-11-13 18:27:30,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-13 18:27:30,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 371. [2021-11-13 18:27:30,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 368 states have (on average 1.6032608695652173) internal successors, (590), 369 states have internal predecessors, (590), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:30,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 592 transitions. [2021-11-13 18:27:30,590 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 592 transitions. Word has length 37 [2021-11-13 18:27:30,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:30,591 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 592 transitions. [2021-11-13 18:27:30,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:30,591 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 592 transitions. [2021-11-13 18:27:30,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:27:30,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:30,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:30,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:27:30,595 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:30,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:30,597 INFO L85 PathProgramCache]: Analyzing trace with hash -837238242, now seen corresponding path program 1 times [2021-11-13 18:27:30,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:30,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647318756] [2021-11-13 18:27:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:30,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:30,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:30,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647318756] [2021-11-13 18:27:30,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647318756] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:30,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:30,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:30,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627440536] [2021-11-13 18:27:30,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:30,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:30,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:30,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:30,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:30,673 INFO L87 Difference]: Start difference. First operand 371 states and 592 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:30,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:30,744 INFO L93 Difference]: Finished difference Result 888 states and 1421 transitions. [2021-11-13 18:27:30,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:30,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:27:30,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:30,749 INFO L225 Difference]: With dead ends: 888 [2021-11-13 18:27:30,749 INFO L226 Difference]: Without dead ends: 541 [2021-11-13 18:27:30,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:30,751 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 181 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.64ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.63ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:30,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 351 Invalid, 17 Unknown, 0 Unchecked, 1.64ms Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 17.63ms Time] [2021-11-13 18:27:30,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-13 18:27:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 537. [2021-11-13 18:27:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 534 states have (on average 1.599250936329588) internal successors, (854), 535 states have internal predecessors, (854), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:30,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 856 transitions. [2021-11-13 18:27:30,789 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 856 transitions. Word has length 37 [2021-11-13 18:27:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:30,793 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 856 transitions. [2021-11-13 18:27:30,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:30,793 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 856 transitions. [2021-11-13 18:27:30,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:27:30,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:30,795 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:30,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:27:30,795 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:30,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:30,803 INFO L85 PathProgramCache]: Analyzing trace with hash 488921634, now seen corresponding path program 1 times [2021-11-13 18:27:30,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:30,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338879402] [2021-11-13 18:27:30,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:30,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:30,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:30,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338879402] [2021-11-13 18:27:30,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338879402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:30,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:30,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:27:30,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278010793] [2021-11-13 18:27:30,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:30,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:30,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:30,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:30,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:30,873 INFO L87 Difference]: Start difference. First operand 537 states and 856 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:30,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:30,994 INFO L93 Difference]: Finished difference Result 1369 states and 2183 transitions. [2021-11-13 18:27:30,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:27:30,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:27:30,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:31,001 INFO L225 Difference]: With dead ends: 1369 [2021-11-13 18:27:31,001 INFO L226 Difference]: Without dead ends: 849 [2021-11-13 18:27:31,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:27:31,005 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 491 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.46ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.32ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:31,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 337 Invalid, 45 Unknown, 0 Unchecked, 2.46ms Time], IncrementalHoareTripleChecker [14 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 41.32ms Time] [2021-11-13 18:27:31,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-11-13 18:27:31,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 537. [2021-11-13 18:27:31,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 534 states have (on average 1.5842696629213484) internal successors, (846), 535 states have internal predecessors, (846), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:31,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 848 transitions. [2021-11-13 18:27:31,055 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 848 transitions. Word has length 37 [2021-11-13 18:27:31,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:31,056 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 848 transitions. [2021-11-13 18:27:31,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:31,056 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 848 transitions. [2021-11-13 18:27:31,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:27:31,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:31,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:31,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:27:31,057 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:31,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:31,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1505223072, now seen corresponding path program 1 times [2021-11-13 18:27:31,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:31,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272668152] [2021-11-13 18:27:31,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:31,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:31,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:31,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272668152] [2021-11-13 18:27:31,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272668152] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:31,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:31,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:27:31,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564081500] [2021-11-13 18:27:31,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:31,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:31,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:31,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:31,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:31,122 INFO L87 Difference]: Start difference. First operand 537 states and 848 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:31,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:31,249 INFO L93 Difference]: Finished difference Result 1369 states and 2160 transitions. [2021-11-13 18:27:31,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:27:31,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:27:31,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:31,254 INFO L225 Difference]: With dead ends: 1369 [2021-11-13 18:27:31,255 INFO L226 Difference]: Without dead ends: 855 [2021-11-13 18:27:31,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:27:31,258 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 475 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.24ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.04ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:31,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 326 Invalid, 54 Unknown, 0 Unchecked, 2.24ms Time], IncrementalHoareTripleChecker [16 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 46.04ms Time] [2021-11-13 18:27:31,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-11-13 18:27:31,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 537. [2021-11-13 18:27:31,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 534 states have (on average 1.5692883895131087) internal successors, (838), 535 states have internal predecessors, (838), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 840 transitions. [2021-11-13 18:27:31,314 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 840 transitions. Word has length 37 [2021-11-13 18:27:31,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:31,316 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 840 transitions. [2021-11-13 18:27:31,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:31,317 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 840 transitions. [2021-11-13 18:27:31,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:27:31,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:31,318 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:31,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:27:31,319 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:31,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:31,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1768675870, now seen corresponding path program 1 times [2021-11-13 18:27:31,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:31,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514008984] [2021-11-13 18:27:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:31,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:31,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:31,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514008984] [2021-11-13 18:27:31,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514008984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:31,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:31,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:27:31,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151509923] [2021-11-13 18:27:31,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:31,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:31,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:31,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:31,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:31,392 INFO L87 Difference]: Start difference. First operand 537 states and 840 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:31,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:31,531 INFO L93 Difference]: Finished difference Result 1296 states and 2024 transitions. [2021-11-13 18:27:31,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:27:31,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:27:31,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:31,537 INFO L225 Difference]: With dead ends: 1296 [2021-11-13 18:27:31,537 INFO L226 Difference]: Without dead ends: 776 [2021-11-13 18:27:31,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:27:31,540 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 487 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.34ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.96ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:31,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 356 Invalid, 56 Unknown, 0 Unchecked, 2.34ms Time], IncrementalHoareTripleChecker [19 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 51.96ms Time] [2021-11-13 18:27:31,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-11-13 18:27:31,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 585. [2021-11-13 18:27:31,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 582 states have (on average 1.5378006872852235) internal successors, (895), 583 states have internal predecessors, (895), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:31,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 897 transitions. [2021-11-13 18:27:31,602 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 897 transitions. Word has length 37 [2021-11-13 18:27:31,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:31,603 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 897 transitions. [2021-11-13 18:27:31,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:31,603 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 897 transitions. [2021-11-13 18:27:31,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:27:31,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:31,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:31,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:27:31,606 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:31,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:31,606 INFO L85 PathProgramCache]: Analyzing trace with hash 757558620, now seen corresponding path program 1 times [2021-11-13 18:27:31,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:31,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972432412] [2021-11-13 18:27:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:31,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:31,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:31,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972432412] [2021-11-13 18:27:31,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972432412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:31,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:31,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:31,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466404244] [2021-11-13 18:27:31,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:31,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:31,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:31,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:31,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:31,656 INFO L87 Difference]: Start difference. First operand 585 states and 897 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:31,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:31,739 INFO L93 Difference]: Finished difference Result 1388 states and 2132 transitions. [2021-11-13 18:27:31,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:31,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:27:31,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:31,745 INFO L225 Difference]: With dead ends: 1388 [2021-11-13 18:27:31,745 INFO L226 Difference]: Without dead ends: 817 [2021-11-13 18:27:31,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:31,747 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 118 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.47ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.20ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:31,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 320 Invalid, 30 Unknown, 0 Unchecked, 1.47ms Time], IncrementalHoareTripleChecker [8 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 24.20ms Time] [2021-11-13 18:27:31,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-11-13 18:27:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 814. [2021-11-13 18:27:31,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 811 states have (on average 1.5178791615289766) internal successors, (1231), 812 states have internal predecessors, (1231), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1233 transitions. [2021-11-13 18:27:31,818 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1233 transitions. Word has length 37 [2021-11-13 18:27:31,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:31,818 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1233 transitions. [2021-11-13 18:27:31,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:31,819 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1233 transitions. [2021-11-13 18:27:31,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-13 18:27:31,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:31,820 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:31,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:27:31,821 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:31,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:31,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1472514580, now seen corresponding path program 1 times [2021-11-13 18:27:31,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:31,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099970001] [2021-11-13 18:27:31,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:31,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:31,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:31,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099970001] [2021-11-13 18:27:31,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099970001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:31,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:31,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:31,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536504384] [2021-11-13 18:27:31,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:31,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:31,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:31,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:31,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:31,873 INFO L87 Difference]: Start difference. First operand 814 states and 1233 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:31,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:31,971 INFO L93 Difference]: Finished difference Result 2023 states and 3098 transitions. [2021-11-13 18:27:31,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:31,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-13 18:27:31,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:31,980 INFO L225 Difference]: With dead ends: 2023 [2021-11-13 18:27:31,980 INFO L226 Difference]: Without dead ends: 1236 [2021-11-13 18:27:31,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:31,985 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 85 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.33ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.18ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:31,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 426 Invalid, 14 Unknown, 0 Unchecked, 1.33ms Time], IncrementalHoareTripleChecker [6 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 12.18ms Time] [2021-11-13 18:27:31,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-11-13 18:27:32,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1232. [2021-11-13 18:27:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1229 states have (on average 1.5256305939788446) internal successors, (1875), 1230 states have internal predecessors, (1875), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:32,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1877 transitions. [2021-11-13 18:27:32,076 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1877 transitions. Word has length 48 [2021-11-13 18:27:32,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:32,076 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 1877 transitions. [2021-11-13 18:27:32,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:32,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1877 transitions. [2021-11-13 18:27:32,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-13 18:27:32,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:32,078 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:32,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:27:32,084 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:32,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:32,085 INFO L85 PathProgramCache]: Analyzing trace with hash -576873262, now seen corresponding path program 1 times [2021-11-13 18:27:32,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:32,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559889353] [2021-11-13 18:27:32,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:32,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:27:32,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:32,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559889353] [2021-11-13 18:27:32,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559889353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:32,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:32,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:32,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630641495] [2021-11-13 18:27:32,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:32,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:32,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:32,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:32,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:32,125 INFO L87 Difference]: Start difference. First operand 1232 states and 1877 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:32,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:32,214 INFO L93 Difference]: Finished difference Result 2415 states and 3695 transitions. [2021-11-13 18:27:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:32,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-13 18:27:32,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:32,222 INFO L225 Difference]: With dead ends: 2415 [2021-11-13 18:27:32,222 INFO L226 Difference]: Without dead ends: 1210 [2021-11-13 18:27:32,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:32,225 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 183 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.91ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:32,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 186 Invalid, 2 Unknown, 0 Unchecked, 0.91ms Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 4.00ms Time] [2021-11-13 18:27:32,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-11-13 18:27:32,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1210. [2021-11-13 18:27:32,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1207 states have (on average 1.5310687655343829) internal successors, (1848), 1208 states have internal predecessors, (1848), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:32,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1850 transitions. [2021-11-13 18:27:32,316 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1850 transitions. Word has length 48 [2021-11-13 18:27:32,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:32,317 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 1850 transitions. [2021-11-13 18:27:32,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:32,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1850 transitions. [2021-11-13 18:27:32,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-13 18:27:32,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:32,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:32,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:27:32,319 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:32,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:32,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1940711686, now seen corresponding path program 1 times [2021-11-13 18:27:32,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:32,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371085944] [2021-11-13 18:27:32,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:32,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:32,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:32,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371085944] [2021-11-13 18:27:32,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371085944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:32,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:32,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:32,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809210028] [2021-11-13 18:27:32,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:32,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:32,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:32,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:32,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:32,356 INFO L87 Difference]: Start difference. First operand 1210 states and 1850 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:32,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:32,515 INFO L93 Difference]: Finished difference Result 3098 states and 4789 transitions. [2021-11-13 18:27:32,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:32,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-13 18:27:32,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:32,527 INFO L225 Difference]: With dead ends: 3098 [2021-11-13 18:27:32,528 INFO L226 Difference]: Without dead ends: 1915 [2021-11-13 18:27:32,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:32,533 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 86 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.22ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.14ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:32,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 330 Invalid, 14 Unknown, 0 Unchecked, 1.22ms Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 18.14ms Time] [2021-11-13 18:27:32,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2021-11-13 18:27:32,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1911. [2021-11-13 18:27:32,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1908 states have (on average 1.540356394129979) internal successors, (2939), 1909 states have internal predecessors, (2939), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:32,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 2941 transitions. [2021-11-13 18:27:32,692 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 2941 transitions. Word has length 49 [2021-11-13 18:27:32,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:32,693 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 2941 transitions. [2021-11-13 18:27:32,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:32,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 2941 transitions. [2021-11-13 18:27:32,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-13 18:27:32,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:32,695 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:32,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 18:27:32,696 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:32,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:32,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1304018632, now seen corresponding path program 1 times [2021-11-13 18:27:32,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:32,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241308923] [2021-11-13 18:27:32,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:32,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:32,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:32,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241308923] [2021-11-13 18:27:32,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241308923] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:32,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:32,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:32,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259308082] [2021-11-13 18:27:32,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:32,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:32,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:32,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:32,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:32,747 INFO L87 Difference]: Start difference. First operand 1911 states and 2941 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:32,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:32,999 INFO L93 Difference]: Finished difference Result 5154 states and 8027 transitions. [2021-11-13 18:27:33,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:33,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-13 18:27:33,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:33,019 INFO L225 Difference]: With dead ends: 5154 [2021-11-13 18:27:33,020 INFO L226 Difference]: Without dead ends: 3272 [2021-11-13 18:27:33,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:33,024 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 90 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.62ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.91ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:33,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 397 Invalid, 17 Unknown, 0 Unchecked, 1.62ms Time], IncrementalHoareTripleChecker [9 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 18.91ms Time] [2021-11-13 18:27:33,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-11-13 18:27:33,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 3268. [2021-11-13 18:27:33,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3268 states, 3265 states have (on average 1.552833078101072) internal successors, (5070), 3266 states have internal predecessors, (5070), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:33,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 5072 transitions. [2021-11-13 18:27:33,282 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 5072 transitions. Word has length 50 [2021-11-13 18:27:33,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:33,283 INFO L470 AbstractCegarLoop]: Abstraction has 3268 states and 5072 transitions. [2021-11-13 18:27:33,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:33,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 5072 transitions. [2021-11-13 18:27:33,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-13 18:27:33,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:33,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:33,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 18:27:33,285 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:33,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:33,286 INFO L85 PathProgramCache]: Analyzing trace with hash -745369210, now seen corresponding path program 1 times [2021-11-13 18:27:33,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:33,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152728871] [2021-11-13 18:27:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:33,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:27:33,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:33,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152728871] [2021-11-13 18:27:33,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152728871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:33,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:33,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:33,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137808466] [2021-11-13 18:27:33,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:33,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:33,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:33,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:33,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:33,324 INFO L87 Difference]: Start difference. First operand 3268 states and 5072 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:33,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:33,522 INFO L93 Difference]: Finished difference Result 6485 states and 10085 transitions. [2021-11-13 18:27:33,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:33,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-13 18:27:33,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:33,541 INFO L225 Difference]: With dead ends: 6485 [2021-11-13 18:27:33,541 INFO L226 Difference]: Without dead ends: 3246 [2021-11-13 18:27:33,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:33,546 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 180 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.10ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.48ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:33,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 185 Invalid, 2 Unknown, 0 Unchecked, 1.10ms Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 3.48ms Time] [2021-11-13 18:27:33,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2021-11-13 18:27:33,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 3246. [2021-11-13 18:27:33,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3246 states, 3243 states have (on average 1.555349984582177) internal successors, (5044), 3244 states have internal predecessors, (5044), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:33,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3246 states to 3246 states and 5046 transitions. [2021-11-13 18:27:33,779 INFO L78 Accepts]: Start accepts. Automaton has 3246 states and 5046 transitions. Word has length 50 [2021-11-13 18:27:33,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:33,779 INFO L470 AbstractCegarLoop]: Abstraction has 3246 states and 5046 transitions. [2021-11-13 18:27:33,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:33,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3246 states and 5046 transitions. [2021-11-13 18:27:33,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 18:27:33,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:33,781 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:33,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 18:27:33,782 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:33,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:33,782 INFO L85 PathProgramCache]: Analyzing trace with hash 251128390, now seen corresponding path program 1 times [2021-11-13 18:27:33,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:33,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019723381] [2021-11-13 18:27:33,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:33,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:33,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:33,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019723381] [2021-11-13 18:27:33,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019723381] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:33,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:33,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:27:33,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50433019] [2021-11-13 18:27:33,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:33,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:33,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:33,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:33,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:33,823 INFO L87 Difference]: Start difference. First operand 3246 states and 5046 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:34,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:34,231 INFO L93 Difference]: Finished difference Result 8233 states and 12817 transitions. [2021-11-13 18:27:34,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:27:34,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-13 18:27:34,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:34,258 INFO L225 Difference]: With dead ends: 8233 [2021-11-13 18:27:34,258 INFO L226 Difference]: Without dead ends: 4223 [2021-11-13 18:27:34,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:27:34,264 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 405 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.31ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.68ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:34,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 309 Invalid, 48 Unknown, 0 Unchecked, 2.31ms Time], IncrementalHoareTripleChecker [13 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 36.68ms Time] [2021-11-13 18:27:34,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2021-11-13 18:27:34,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 4223. [2021-11-13 18:27:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4223 states, 4220 states have (on average 1.542654028436019) internal successors, (6510), 4221 states have internal predecessors, (6510), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:34,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4223 states to 4223 states and 6512 transitions. [2021-11-13 18:27:34,623 INFO L78 Accepts]: Start accepts. Automaton has 4223 states and 6512 transitions. Word has length 51 [2021-11-13 18:27:34,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:34,623 INFO L470 AbstractCegarLoop]: Abstraction has 4223 states and 6512 transitions. [2021-11-13 18:27:34,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:34,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4223 states and 6512 transitions. [2021-11-13 18:27:34,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 18:27:34,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:34,631 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:34,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 18:27:34,632 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:34,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:34,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1269450183, now seen corresponding path program 1 times [2021-11-13 18:27:34,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:34,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724802213] [2021-11-13 18:27:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:34,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:34,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:34,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724802213] [2021-11-13 18:27:34,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724802213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:34,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:34,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:27:34,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666526892] [2021-11-13 18:27:34,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:34,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:27:34,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:34,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:27:34,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:27:34,695 INFO L87 Difference]: Start difference. First operand 4223 states and 6512 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:35,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:35,141 INFO L93 Difference]: Finished difference Result 10740 states and 16466 transitions. [2021-11-13 18:27:35,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:27:35,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-13 18:27:35,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:35,188 INFO L225 Difference]: With dead ends: 10740 [2021-11-13 18:27:35,188 INFO L226 Difference]: Without dead ends: 6540 [2021-11-13 18:27:35,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:27:35,194 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 696 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.28ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.44ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:35,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 526 Invalid, 68 Unknown, 0 Unchecked, 3.28ms Time], IncrementalHoareTripleChecker [21 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 51.44ms Time] [2021-11-13 18:27:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6540 states. [2021-11-13 18:27:35,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6540 to 4926. [2021-11-13 18:27:35,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4926 states, 4923 states have (on average 1.5118829981718465) internal successors, (7443), 4924 states have internal predecessors, (7443), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:35,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4926 states to 4926 states and 7445 transitions. [2021-11-13 18:27:35,581 INFO L78 Accepts]: Start accepts. Automaton has 4926 states and 7445 transitions. Word has length 57 [2021-11-13 18:27:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:35,582 INFO L470 AbstractCegarLoop]: Abstraction has 4926 states and 7445 transitions. [2021-11-13 18:27:35,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand 4926 states and 7445 transitions. [2021-11-13 18:27:35,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-13 18:27:35,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:35,587 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:35,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 18:27:35,587 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:35,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:35,588 INFO L85 PathProgramCache]: Analyzing trace with hash -846224771, now seen corresponding path program 1 times [2021-11-13 18:27:35,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:35,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785549521] [2021-11-13 18:27:35,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:35,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:35,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:35,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785549521] [2021-11-13 18:27:35,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785549521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:35,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:35,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:35,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767143851] [2021-11-13 18:27:35,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:35,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:35,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:35,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:35,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:35,636 INFO L87 Difference]: Start difference. First operand 4926 states and 7445 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:36,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:36,012 INFO L93 Difference]: Finished difference Result 10199 states and 15380 transitions. [2021-11-13 18:27:36,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:36,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-13 18:27:36,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:36,026 INFO L225 Difference]: With dead ends: 10199 [2021-11-13 18:27:36,026 INFO L226 Difference]: Without dead ends: 5302 [2021-11-13 18:27:36,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:36,034 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 132 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.98ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.12ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:36,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 315 Invalid, 15 Unknown, 0 Unchecked, 0.98ms Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 13.12ms Time] [2021-11-13 18:27:36,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5302 states. [2021-11-13 18:27:36,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5302 to 5270. [2021-11-13 18:27:36,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5270 states, 5267 states have (on average 1.4649705714828176) internal successors, (7716), 5268 states have internal predecessors, (7716), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:36,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5270 states to 5270 states and 7718 transitions. [2021-11-13 18:27:36,464 INFO L78 Accepts]: Start accepts. Automaton has 5270 states and 7718 transitions. Word has length 91 [2021-11-13 18:27:36,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:36,464 INFO L470 AbstractCegarLoop]: Abstraction has 5270 states and 7718 transitions. [2021-11-13 18:27:36,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 5270 states and 7718 transitions. [2021-11-13 18:27:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-13 18:27:36,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:36,470 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:36,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-13 18:27:36,471 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:36,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:36,471 INFO L85 PathProgramCache]: Analyzing trace with hash 692618235, now seen corresponding path program 1 times [2021-11-13 18:27:36,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:36,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665987445] [2021-11-13 18:27:36,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:36,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:36,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:36,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665987445] [2021-11-13 18:27:36,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665987445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:36,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:36,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:36,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391105353] [2021-11-13 18:27:36,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:36,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:36,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:36,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:36,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:36,516 INFO L87 Difference]: Start difference. First operand 5270 states and 7718 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:36,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:36,898 INFO L93 Difference]: Finished difference Result 11053 states and 16146 transitions. [2021-11-13 18:27:36,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:36,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-13 18:27:36,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:36,911 INFO L225 Difference]: With dead ends: 11053 [2021-11-13 18:27:36,911 INFO L226 Difference]: Without dead ends: 5824 [2021-11-13 18:27:36,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:36,918 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 131 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.38ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.38ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:36,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 314 Invalid, 15 Unknown, 0 Unchecked, 1.38ms Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 14.38ms Time] [2021-11-13 18:27:36,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5824 states. [2021-11-13 18:27:37,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5824 to 5776. [2021-11-13 18:27:37,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5776 states, 5773 states have (on average 1.4188463537155724) internal successors, (8191), 5774 states have internal predecessors, (8191), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:37,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5776 states to 5776 states and 8193 transitions. [2021-11-13 18:27:37,254 INFO L78 Accepts]: Start accepts. Automaton has 5776 states and 8193 transitions. Word has length 92 [2021-11-13 18:27:37,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:37,254 INFO L470 AbstractCegarLoop]: Abstraction has 5776 states and 8193 transitions. [2021-11-13 18:27:37,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:37,254 INFO L276 IsEmpty]: Start isEmpty. Operand 5776 states and 8193 transitions. [2021-11-13 18:27:37,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-13 18:27:37,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:37,260 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:37,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-13 18:27:37,261 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:37,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:37,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1736291809, now seen corresponding path program 1 times [2021-11-13 18:27:37,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:37,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220037751] [2021-11-13 18:27:37,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:37,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:37,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:37,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220037751] [2021-11-13 18:27:37,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220037751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:37,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:37,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:37,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039017169] [2021-11-13 18:27:37,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:37,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:37,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:37,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:37,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:37,294 INFO L87 Difference]: Start difference. First operand 5776 states and 8193 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:37,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:37,671 INFO L93 Difference]: Finished difference Result 11872 states and 16850 transitions. [2021-11-13 18:27:37,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:37,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-13 18:27:37,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:37,686 INFO L225 Difference]: With dead ends: 11872 [2021-11-13 18:27:37,686 INFO L226 Difference]: Without dead ends: 6157 [2021-11-13 18:27:37,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:37,695 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 127 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.06ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.88ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:37,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 311 Invalid, 21 Unknown, 0 Unchecked, 1.06ms Time], IncrementalHoareTripleChecker [8 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 17.88ms Time] [2021-11-13 18:27:37,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6157 states. [2021-11-13 18:27:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6157 to 5538. [2021-11-13 18:27:38,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5538 states, 5535 states have (on average 1.3609756097560977) internal successors, (7533), 5536 states have internal predecessors, (7533), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:38,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5538 states to 5538 states and 7535 transitions. [2021-11-13 18:27:38,033 INFO L78 Accepts]: Start accepts. Automaton has 5538 states and 7535 transitions. Word has length 93 [2021-11-13 18:27:38,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:38,033 INFO L470 AbstractCegarLoop]: Abstraction has 5538 states and 7535 transitions. [2021-11-13 18:27:38,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:38,034 INFO L276 IsEmpty]: Start isEmpty. Operand 5538 states and 7535 transitions. [2021-11-13 18:27:38,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-13 18:27:38,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:38,040 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:38,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-13 18:27:38,040 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:38,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:38,041 INFO L85 PathProgramCache]: Analyzing trace with hash -370455463, now seen corresponding path program 1 times [2021-11-13 18:27:38,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:38,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487275541] [2021-11-13 18:27:38,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:38,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:27:38,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:38,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487275541] [2021-11-13 18:27:38,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487275541] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:38,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:38,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:27:38,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859117014] [2021-11-13 18:27:38,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:38,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:38,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:38,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:38,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:38,081 INFO L87 Difference]: Start difference. First operand 5538 states and 7535 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:38,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:38,567 INFO L93 Difference]: Finished difference Result 10334 states and 13967 transitions. [2021-11-13 18:27:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:27:38,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-13 18:27:38,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:38,579 INFO L225 Difference]: With dead ends: 10334 [2021-11-13 18:27:38,579 INFO L226 Difference]: Without dead ends: 5283 [2021-11-13 18:27:38,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:27:38,586 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 432 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.20ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.48ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:38,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 459 Invalid, 69 Unknown, 0 Unchecked, 2.20ms Time], IncrementalHoareTripleChecker [15 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 57.48ms Time] [2021-11-13 18:27:38,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5283 states. [2021-11-13 18:27:38,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5283 to 5167. [2021-11-13 18:27:38,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5167 states, 5164 states have (on average 1.311192873741286) internal successors, (6771), 5165 states have internal predecessors, (6771), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:38,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5167 states to 5167 states and 6773 transitions. [2021-11-13 18:27:38,980 INFO L78 Accepts]: Start accepts. Automaton has 5167 states and 6773 transitions. Word has length 94 [2021-11-13 18:27:38,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:38,980 INFO L470 AbstractCegarLoop]: Abstraction has 5167 states and 6773 transitions. [2021-11-13 18:27:38,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:38,981 INFO L276 IsEmpty]: Start isEmpty. Operand 5167 states and 6773 transitions. [2021-11-13 18:27:38,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:27:38,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:38,995 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:38,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-13 18:27:38,996 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:38,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:38,996 INFO L85 PathProgramCache]: Analyzing trace with hash -924986801, now seen corresponding path program 1 times [2021-11-13 18:27:38,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:38,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140057297] [2021-11-13 18:27:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:38,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:27:39,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:39,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140057297] [2021-11-13 18:27:39,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140057297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:39,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:39,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:39,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969879419] [2021-11-13 18:27:39,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:39,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:39,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:39,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:39,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:39,040 INFO L87 Difference]: Start difference. First operand 5167 states and 6773 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:39,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:39,458 INFO L93 Difference]: Finished difference Result 9868 states and 12922 transitions. [2021-11-13 18:27:39,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:39,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-13 18:27:39,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:39,471 INFO L225 Difference]: With dead ends: 9868 [2021-11-13 18:27:39,471 INFO L226 Difference]: Without dead ends: 5113 [2021-11-13 18:27:39,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:39,480 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 34 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.22ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.34ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:39,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 309 Invalid, 14 Unknown, 0 Unchecked, 1.22ms Time], IncrementalHoareTripleChecker [4 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 13.34ms Time] [2021-11-13 18:27:39,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5113 states. [2021-11-13 18:27:39,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5113 to 5113. [2021-11-13 18:27:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5113 states, 5110 states have (on average 1.3043052837573386) internal successors, (6665), 5111 states have internal predecessors, (6665), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5113 states to 5113 states and 6667 transitions. [2021-11-13 18:27:39,925 INFO L78 Accepts]: Start accepts. Automaton has 5113 states and 6667 transitions. Word has length 123 [2021-11-13 18:27:39,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:39,926 INFO L470 AbstractCegarLoop]: Abstraction has 5113 states and 6667 transitions. [2021-11-13 18:27:39,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:39,926 INFO L276 IsEmpty]: Start isEmpty. Operand 5113 states and 6667 transitions. [2021-11-13 18:27:39,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-13 18:27:39,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:39,945 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:39,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-13 18:27:39,945 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:39,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:39,946 INFO L85 PathProgramCache]: Analyzing trace with hash -974943913, now seen corresponding path program 1 times [2021-11-13 18:27:39,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:39,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452087824] [2021-11-13 18:27:39,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:39,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:27:39,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:39,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452087824] [2021-11-13 18:27:39,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452087824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:39,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:39,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:27:39,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807581839] [2021-11-13 18:27:39,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:39,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:39,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:39,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:39,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:39,989 INFO L87 Difference]: Start difference. First operand 5113 states and 6667 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:40,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:40,363 INFO L93 Difference]: Finished difference Result 9103 states and 11891 transitions. [2021-11-13 18:27:40,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:27:40,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-13 18:27:40,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:40,375 INFO L225 Difference]: With dead ends: 9103 [2021-11-13 18:27:40,375 INFO L226 Difference]: Without dead ends: 5031 [2021-11-13 18:27:40,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:27:40,382 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 314 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.91ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.42ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:40,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 320 Invalid, 36 Unknown, 0 Unchecked, 1.91ms Time], IncrementalHoareTripleChecker [9 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 33.42ms Time] [2021-11-13 18:27:40,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5031 states. [2021-11-13 18:27:40,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5031 to 5027. [2021-11-13 18:27:40,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5027 states, 5024 states have (on average 1.2818471337579618) internal successors, (6440), 5025 states have internal predecessors, (6440), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5027 states to 5027 states and 6442 transitions. [2021-11-13 18:27:40,669 INFO L78 Accepts]: Start accepts. Automaton has 5027 states and 6442 transitions. Word has length 136 [2021-11-13 18:27:40,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:40,670 INFO L470 AbstractCegarLoop]: Abstraction has 5027 states and 6442 transitions. [2021-11-13 18:27:40,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:40,670 INFO L276 IsEmpty]: Start isEmpty. Operand 5027 states and 6442 transitions. [2021-11-13 18:27:40,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-13 18:27:40,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:40,681 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:40,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-13 18:27:40,681 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:40,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:40,682 INFO L85 PathProgramCache]: Analyzing trace with hash 45217767, now seen corresponding path program 1 times [2021-11-13 18:27:40,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:40,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367265314] [2021-11-13 18:27:40,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:40,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 18:27:40,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:40,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367265314] [2021-11-13 18:27:40,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367265314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:40,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:40,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:40,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500287348] [2021-11-13 18:27:40,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:40,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:40,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:40,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:40,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:40,717 INFO L87 Difference]: Start difference. First operand 5027 states and 6442 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:41,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:41,023 INFO L93 Difference]: Finished difference Result 9635 states and 12336 transitions. [2021-11-13 18:27:41,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:41,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-13 18:27:41,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:41,036 INFO L225 Difference]: With dead ends: 9635 [2021-11-13 18:27:41,036 INFO L226 Difference]: Without dead ends: 5027 [2021-11-13 18:27:41,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:41,045 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 25 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.05ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.47ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:41,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 308 Invalid, 9 Unknown, 0 Unchecked, 1.05ms Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 9.47ms Time] [2021-11-13 18:27:41,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5027 states. [2021-11-13 18:27:41,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5027 to 4987. [2021-11-13 18:27:41,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4987 states, 4984 states have (on average 1.2756821829855538) internal successors, (6358), 4985 states have internal predecessors, (6358), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:41,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4987 states to 4987 states and 6360 transitions. [2021-11-13 18:27:41,421 INFO L78 Accepts]: Start accepts. Automaton has 4987 states and 6360 transitions. Word has length 142 [2021-11-13 18:27:41,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:41,422 INFO L470 AbstractCegarLoop]: Abstraction has 4987 states and 6360 transitions. [2021-11-13 18:27:41,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:41,422 INFO L276 IsEmpty]: Start isEmpty. Operand 4987 states and 6360 transitions. [2021-11-13 18:27:41,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-13 18:27:41,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:41,432 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:41,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-13 18:27:41,433 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:41,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:41,434 INFO L85 PathProgramCache]: Analyzing trace with hash -400505291, now seen corresponding path program 1 times [2021-11-13 18:27:41,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:41,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310837256] [2021-11-13 18:27:41,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:41,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 18:27:41,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:41,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310837256] [2021-11-13 18:27:41,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310837256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:41,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:41,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:41,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458557538] [2021-11-13 18:27:41,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:41,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:41,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:41,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:41,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:41,476 INFO L87 Difference]: Start difference. First operand 4987 states and 6360 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:41,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:41,719 INFO L93 Difference]: Finished difference Result 9583 states and 12214 transitions. [2021-11-13 18:27:41,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:41,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-13 18:27:41,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:41,728 INFO L225 Difference]: With dead ends: 9583 [2021-11-13 18:27:41,729 INFO L226 Difference]: Without dead ends: 4996 [2021-11-13 18:27:41,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:41,737 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 21 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.03ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.59ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:41,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 307 Invalid, 9 Unknown, 0 Unchecked, 1.03ms Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 9.59ms Time] [2021-11-13 18:27:41,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2021-11-13 18:27:42,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 4956. [2021-11-13 18:27:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4956 states, 4953 states have (on average 1.2691298203109227) internal successors, (6286), 4954 states have internal predecessors, (6286), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:42,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4956 states to 4956 states and 6288 transitions. [2021-11-13 18:27:42,072 INFO L78 Accepts]: Start accepts. Automaton has 4956 states and 6288 transitions. Word has length 142 [2021-11-13 18:27:42,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:42,073 INFO L470 AbstractCegarLoop]: Abstraction has 4956 states and 6288 transitions. [2021-11-13 18:27:42,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:42,073 INFO L276 IsEmpty]: Start isEmpty. Operand 4956 states and 6288 transitions. [2021-11-13 18:27:42,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 18:27:42,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:42,083 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:42,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-13 18:27:42,083 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:42,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:42,084 INFO L85 PathProgramCache]: Analyzing trace with hash 428342766, now seen corresponding path program 1 times [2021-11-13 18:27:42,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:42,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205337385] [2021-11-13 18:27:42,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:42,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 18:27:42,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:42,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205337385] [2021-11-13 18:27:42,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205337385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:42,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:42,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:27:42,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298493003] [2021-11-13 18:27:42,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:42,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:42,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:42,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:42,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:42,125 INFO L87 Difference]: Start difference. First operand 4956 states and 6288 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:42,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:42,370 INFO L93 Difference]: Finished difference Result 8098 states and 10321 transitions. [2021-11-13 18:27:42,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:27:42,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-13 18:27:42,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:42,374 INFO L225 Difference]: With dead ends: 8098 [2021-11-13 18:27:42,374 INFO L226 Difference]: Without dead ends: 3542 [2021-11-13 18:27:42,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:27:42,379 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 286 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.58ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.19ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:42,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 299 Invalid, 32 Unknown, 0 Unchecked, 1.58ms Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 28.19ms Time] [2021-11-13 18:27:42,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2021-11-13 18:27:42,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 3538. [2021-11-13 18:27:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3535 states have (on average 1.2393210749646393) internal successors, (4381), 3536 states have internal predecessors, (4381), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:42,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 4383 transitions. [2021-11-13 18:27:42,638 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 4383 transitions. Word has length 146 [2021-11-13 18:27:42,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:42,638 INFO L470 AbstractCegarLoop]: Abstraction has 3538 states and 4383 transitions. [2021-11-13 18:27:42,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:42,639 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 4383 transitions. [2021-11-13 18:27:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 18:27:42,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:42,644 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:42,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-13 18:27:42,645 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:42,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:42,645 INFO L85 PathProgramCache]: Analyzing trace with hash 830883552, now seen corresponding path program 1 times [2021-11-13 18:27:42,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:42,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587205772] [2021-11-13 18:27:42,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:42,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:27:42,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:42,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587205772] [2021-11-13 18:27:42,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587205772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:42,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:42,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:27:42,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113720089] [2021-11-13 18:27:42,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:42,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:42,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:42,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:42,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:42,685 INFO L87 Difference]: Start difference. First operand 3538 states and 4383 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:42,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:42,869 INFO L93 Difference]: Finished difference Result 5731 states and 7105 transitions. [2021-11-13 18:27:42,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:27:42,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-13 18:27:42,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:42,873 INFO L225 Difference]: With dead ends: 5731 [2021-11-13 18:27:42,873 INFO L226 Difference]: Without dead ends: 2274 [2021-11-13 18:27:42,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:27:42,877 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 290 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.18ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.67ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:42,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 292 Invalid, 30 Unknown, 0 Unchecked, 1.18ms Time], IncrementalHoareTripleChecker [8 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 23.67ms Time] [2021-11-13 18:27:42,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-11-13 18:27:42,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 2270. [2021-11-13 18:27:42,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 2267 states have (on average 1.2090868989854433) internal successors, (2741), 2268 states have internal predecessors, (2741), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 2743 transitions. [2021-11-13 18:27:42,989 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 2743 transitions. Word has length 146 [2021-11-13 18:27:42,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:42,990 INFO L470 AbstractCegarLoop]: Abstraction has 2270 states and 2743 transitions. [2021-11-13 18:27:42,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:42,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 2743 transitions. [2021-11-13 18:27:42,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-13 18:27:42,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:42,994 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:42,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-13 18:27:42,994 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:42,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:42,995 INFO L85 PathProgramCache]: Analyzing trace with hash 84783450, now seen corresponding path program 1 times [2021-11-13 18:27:42,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:42,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542847246] [2021-11-13 18:27:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:42,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 18:27:43,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:43,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542847246] [2021-11-13 18:27:43,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542847246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:43,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:43,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:43,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159892962] [2021-11-13 18:27:43,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:43,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:43,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:43,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:43,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:43,031 INFO L87 Difference]: Start difference. First operand 2270 states and 2743 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:43,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:43,172 INFO L93 Difference]: Finished difference Result 4102 states and 4994 transitions. [2021-11-13 18:27:43,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:43,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-11-13 18:27:43,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:43,175 INFO L225 Difference]: With dead ends: 4102 [2021-11-13 18:27:43,175 INFO L226 Difference]: Without dead ends: 2208 [2021-11-13 18:27:43,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:43,177 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 1 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.58ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.38ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:43,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 308 Invalid, 12 Unknown, 0 Unchecked, 0.58ms Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 11.38ms Time] [2021-11-13 18:27:43,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-11-13 18:27:43,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2120. [2021-11-13 18:27:43,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2117 states have (on average 1.1917808219178083) internal successors, (2523), 2118 states have internal predecessors, (2523), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:43,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 2525 transitions. [2021-11-13 18:27:43,321 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 2525 transitions. Word has length 185 [2021-11-13 18:27:43,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:43,322 INFO L470 AbstractCegarLoop]: Abstraction has 2120 states and 2525 transitions. [2021-11-13 18:27:43,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:43,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 2525 transitions. [2021-11-13 18:27:43,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-13 18:27:43,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:43,325 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:43,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-13 18:27:43,326 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:43,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:43,326 INFO L85 PathProgramCache]: Analyzing trace with hash -853920653, now seen corresponding path program 1 times [2021-11-13 18:27:43,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:43,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520404823] [2021-11-13 18:27:43,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:43,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:27:43,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:43,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520404823] [2021-11-13 18:27:43,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520404823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:43,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:43,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:43,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925992362] [2021-11-13 18:27:43,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:43,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:43,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:43,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:43,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:43,365 INFO L87 Difference]: Start difference. First operand 2120 states and 2525 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:43,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:43,516 INFO L93 Difference]: Finished difference Result 4549 states and 5458 transitions. [2021-11-13 18:27:43,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:43,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-13 18:27:43,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:43,520 INFO L225 Difference]: With dead ends: 4549 [2021-11-13 18:27:43,520 INFO L226 Difference]: Without dead ends: 2799 [2021-11-13 18:27:43,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:43,523 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 147 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.87ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.42ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:43,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 310 Invalid, 9 Unknown, 0 Unchecked, 0.87ms Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 9.42ms Time] [2021-11-13 18:27:43,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-11-13 18:27:43,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 2414. [2021-11-13 18:27:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2411 states have (on average 1.1775197013687266) internal successors, (2839), 2412 states have internal predecessors, (2839), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 2841 transitions. [2021-11-13 18:27:43,697 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 2841 transitions. Word has length 192 [2021-11-13 18:27:43,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:43,697 INFO L470 AbstractCegarLoop]: Abstraction has 2414 states and 2841 transitions. [2021-11-13 18:27:43,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:43,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 2841 transitions. [2021-11-13 18:27:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-13 18:27:43,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:43,699 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:43,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-13 18:27:43,700 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:43,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:43,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1632035571, now seen corresponding path program 1 times [2021-11-13 18:27:43,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:43,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126550240] [2021-11-13 18:27:43,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:43,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:27:43,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:43,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126550240] [2021-11-13 18:27:43,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126550240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:43,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:43,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:43,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570311693] [2021-11-13 18:27:43,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:43,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:43,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:43,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:43,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:43,743 INFO L87 Difference]: Start difference. First operand 2414 states and 2841 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:43,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:43,977 INFO L93 Difference]: Finished difference Result 4423 states and 5235 transitions. [2021-11-13 18:27:43,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:43,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-13 18:27:43,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:43,981 INFO L225 Difference]: With dead ends: 4423 [2021-11-13 18:27:43,982 INFO L226 Difference]: Without dead ends: 2414 [2021-11-13 18:27:43,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:43,985 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 0 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.61ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.23ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:43,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 315 Invalid, 12 Unknown, 0 Unchecked, 0.61ms Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 11.23ms Time] [2021-11-13 18:27:43,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-11-13 18:27:44,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 2414. [2021-11-13 18:27:44,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2411 states have (on average 1.1766901700539196) internal successors, (2837), 2412 states have internal predecessors, (2837), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 2839 transitions. [2021-11-13 18:27:44,152 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 2839 transitions. Word has length 195 [2021-11-13 18:27:44,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:44,152 INFO L470 AbstractCegarLoop]: Abstraction has 2414 states and 2839 transitions. [2021-11-13 18:27:44,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:44,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 2839 transitions. [2021-11-13 18:27:44,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-13 18:27:44,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:44,154 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:44,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-13 18:27:44,155 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:44,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:44,155 INFO L85 PathProgramCache]: Analyzing trace with hash 93695541, now seen corresponding path program 1 times [2021-11-13 18:27:44,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:44,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561839550] [2021-11-13 18:27:44,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:44,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 18:27:44,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:44,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561839550] [2021-11-13 18:27:44,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561839550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:44,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:44,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:44,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181254141] [2021-11-13 18:27:44,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:44,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:44,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:44,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:44,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:44,205 INFO L87 Difference]: Start difference. First operand 2414 states and 2839 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:44,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:44,346 INFO L93 Difference]: Finished difference Result 3443 states and 4059 transitions. [2021-11-13 18:27:44,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:44,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-13 18:27:44,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:44,349 INFO L225 Difference]: With dead ends: 3443 [2021-11-13 18:27:44,349 INFO L226 Difference]: Without dead ends: 1434 [2021-11-13 18:27:44,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:44,352 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 3 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.62ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.46ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:44,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 318 Invalid, 13 Unknown, 0 Unchecked, 0.62ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 12.46ms Time] [2021-11-13 18:27:44,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2021-11-13 18:27:44,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1434. [2021-11-13 18:27:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1431 states have (on average 1.1614255765199162) internal successors, (1662), 1432 states have internal predecessors, (1662), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 1664 transitions. [2021-11-13 18:27:44,467 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 1664 transitions. Word has length 195 [2021-11-13 18:27:44,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:44,467 INFO L470 AbstractCegarLoop]: Abstraction has 1434 states and 1664 transitions. [2021-11-13 18:27:44,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:44,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 1664 transitions. [2021-11-13 18:27:44,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-13 18:27:44,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:44,470 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:44,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-13 18:27:44,470 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:44,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:44,470 INFO L85 PathProgramCache]: Analyzing trace with hash -565835981, now seen corresponding path program 1 times [2021-11-13 18:27:44,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:44,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454859384] [2021-11-13 18:27:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:44,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-13 18:27:44,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:44,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454859384] [2021-11-13 18:27:44,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454859384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:44,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:44,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:44,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27527606] [2021-11-13 18:27:44,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:44,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:44,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:44,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:44,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:44,521 INFO L87 Difference]: Start difference. First operand 1434 states and 1664 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:44,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:44,694 INFO L93 Difference]: Finished difference Result 1443 states and 1674 transitions. [2021-11-13 18:27:44,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:44,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-13 18:27:44,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:44,697 INFO L225 Difference]: With dead ends: 1443 [2021-11-13 18:27:44,697 INFO L226 Difference]: Without dead ends: 1440 [2021-11-13 18:27:44,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:44,698 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 2 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.73ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.73ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:44,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 311 Invalid, 15 Unknown, 0 Unchecked, 0.73ms Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 15.73ms Time] [2021-11-13 18:27:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-11-13 18:27:44,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1436. [2021-11-13 18:27:44,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1433 states have (on average 1.1612002791346825) internal successors, (1664), 1434 states have internal predecessors, (1664), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:44,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 1666 transitions. [2021-11-13 18:27:44,870 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 1666 transitions. Word has length 195 [2021-11-13 18:27:44,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:44,870 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 1666 transitions. [2021-11-13 18:27:44,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:44,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 1666 transitions. [2021-11-13 18:27:44,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-13 18:27:44,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:44,873 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:44,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-13 18:27:44,874 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:44,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:44,874 INFO L85 PathProgramCache]: Analyzing trace with hash -565783188, now seen corresponding path program 1 times [2021-11-13 18:27:44,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:44,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400544681] [2021-11-13 18:27:44,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:44,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:27:45,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:45,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400544681] [2021-11-13 18:27:45,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400544681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:27:45,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863395954] [2021-11-13 18:27:45,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:45,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:27:45,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:27:45,107 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:27:45,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:27:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:45,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 18:27:45,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:27:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 85 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:27:45,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:27:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 85 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:27:46,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863395954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:27:46,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:27:46,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 27 [2021-11-13 18:27:46,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613846006] [2021-11-13 18:27:46,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:27:46,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-13 18:27:46,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:46,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-13 18:27:46,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-11-13 18:27:46,777 INFO L87 Difference]: Start difference. First operand 1436 states and 1666 transitions. Second operand has 27 states, 27 states have (on average 17.51851851851852) internal successors, (473), 27 states have internal predecessors, (473), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:49,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:49,445 INFO L93 Difference]: Finished difference Result 5249 states and 6026 transitions. [2021-11-13 18:27:49,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-13 18:27:49,445 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 17.51851851851852) internal successors, (473), 27 states have internal predecessors, (473), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-13 18:27:49,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:49,454 INFO L225 Difference]: With dead ends: 5249 [2021-11-13 18:27:49,454 INFO L226 Difference]: Without dead ends: 4170 [2021-11-13 18:27:49,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=742, Invalid=5738, Unknown=0, NotChecked=0, Total=6480 [2021-11-13 18:27:49,460 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 3430 mSDsluCounter, 10277 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 614.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3430 SdHoareTripleChecker+Valid, 10880 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.75ms SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 751.68ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:49,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3430 Valid, 10880 Invalid, 1353 Unknown, 0 Unchecked, 33.75ms Time], IncrementalHoareTripleChecker [155 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 751.68ms Time] [2021-11-13 18:27:49,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2021-11-13 18:27:49,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 1882. [2021-11-13 18:27:49,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1879 states have (on average 1.1559340074507718) internal successors, (2172), 1880 states have internal predecessors, (2172), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2174 transitions. [2021-11-13 18:27:49,620 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2174 transitions. Word has length 195 [2021-11-13 18:27:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:49,621 INFO L470 AbstractCegarLoop]: Abstraction has 1882 states and 2174 transitions. [2021-11-13 18:27:49,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 17.51851851851852) internal successors, (473), 27 states have internal predecessors, (473), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2174 transitions. [2021-11-13 18:27:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-13 18:27:49,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:49,624 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:49,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:27:49,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:27:49,838 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:49,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:49,838 INFO L85 PathProgramCache]: Analyzing trace with hash -359844139, now seen corresponding path program 1 times [2021-11-13 18:27:49,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:49,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619155275] [2021-11-13 18:27:49,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:49,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:27:49,862 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:27:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:27:49,973 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:27:49,973 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:27:49,974 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:27:49,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-13 18:27:49,980 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:49,983 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:27:50,075 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 18:27:50,078 INFO L158 Benchmark]: Toolchain (without parser) took 22986.17ms. Allocated memory was 86.0MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 55.8MB in the beginning and 739.5MB in the end (delta: -683.7MB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2021-11-13 18:27:50,078 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 86.0MB. Free memory was 43.1MB in the beginning and 43.1MB in the end (delta: 44.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:27:50,079 INFO L158 Benchmark]: CACSL2BoogieTranslator took 432.22ms. Allocated memory was 86.0MB in the beginning and 113.2MB in the end (delta: 27.3MB). Free memory was 55.6MB in the beginning and 86.4MB in the end (delta: -30.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 18:27:50,079 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.34ms. Allocated memory is still 113.2MB. Free memory was 86.4MB in the beginning and 84.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:27:50,080 INFO L158 Benchmark]: Boogie Preprocessor took 86.29ms. Allocated memory is still 113.2MB. Free memory was 84.3MB in the beginning and 82.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:27:50,089 INFO L158 Benchmark]: RCFGBuilder took 733.51ms. Allocated memory is still 113.2MB. Free memory was 82.2MB in the beginning and 62.1MB in the end (delta: 20.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-13 18:27:50,089 INFO L158 Benchmark]: TraceAbstraction took 21669.67ms. Allocated memory was 113.2MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 61.2MB in the beginning and 739.5MB in the end (delta: -678.3MB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. [2021-11-13 18:27:50,092 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 86.0MB. Free memory was 43.1MB in the beginning and 43.1MB in the end (delta: 44.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 432.22ms. Allocated memory was 86.0MB in the beginning and 113.2MB in the end (delta: 27.3MB). Free memory was 55.6MB in the beginning and 86.4MB in the end (delta: -30.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.34ms. Allocated memory is still 113.2MB. Free memory was 86.4MB in the beginning and 84.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 86.29ms. Allocated memory is still 113.2MB. Free memory was 84.3MB in the beginning and 82.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 733.51ms. Allocated memory is still 113.2MB. Free memory was 82.2MB in the beginning and 62.1MB in the end (delta: 20.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 21669.67ms. Allocated memory was 113.2MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 61.2MB in the beginning and 739.5MB in the end (delta: -678.3MB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. * 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 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:27:50,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/toy1.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y --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 c40ed6d21fe4d61cae011269f1fdb95d05149cea0f3470f42c6e8f2fc8fb0d6a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:27:52,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:27:52,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:27:52,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:27:52,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:27:52,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:27:52,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:27:52,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:27:52,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:27:52,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:27:52,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:27:52,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:27:52,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:27:52,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:27:52,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:27:52,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:27:52,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:27:52,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:27:52,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:27:52,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:27:52,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:27:52,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:27:52,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:27:52,737 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:27:52,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:27:52,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:27:52,742 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:27:52,743 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:27:52,744 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:27:52,745 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:27:52,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:27:52,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:27:52,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:27:52,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:27:52,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:27:52,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:27:52,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:27:52,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:27:52,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:27:52,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:27:52,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:27:52,773 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-13 18:27:52,805 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:27:52,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:27:52,810 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:27:52,810 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:27:52,811 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:27:52,811 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:27:52,813 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:27:52,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:27:52,813 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:27:52,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:27:52,815 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:27:52,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:27:52,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:27:52,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:27:52,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:27:52,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:27:52,816 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 18:27:52,817 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 18:27:52,817 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:27:52,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:27:52,818 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:27:52,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:27:52,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:27:52,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:27:52,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:27:52,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:27:52,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:27:52,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:27:52,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:27:52,820 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 18:27:52,820 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 18:27:52,821 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:27:52,821 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:27:52,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:27:52,822 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:27:52,822 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 18:27:52,822 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c40ed6d21fe4d61cae011269f1fdb95d05149cea0f3470f42c6e8f2fc8fb0d6a [2021-11-13 18:27:53,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:27:53,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:27:53,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:27:53,237 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:27:53,237 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:27:53,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/systemc/toy1.cil.c [2021-11-13 18:27:53,320 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/data/0f0d7c1e8/617925c69f644c4b8bc3c036e7997c90/FLAGbeea318cf [2021-11-13 18:27:53,856 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:27:53,857 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/sv-benchmarks/c/systemc/toy1.cil.c [2021-11-13 18:27:53,867 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/data/0f0d7c1e8/617925c69f644c4b8bc3c036e7997c90/FLAGbeea318cf [2021-11-13 18:27:54,221 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/data/0f0d7c1e8/617925c69f644c4b8bc3c036e7997c90 [2021-11-13 18:27:54,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:27:54,228 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:27:54,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:27:54,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:27:54,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:27:54,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:27:54" (1/1) ... [2021-11-13 18:27:54,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@177250e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:54, skipping insertion in model container [2021-11-13 18:27:54,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:27:54" (1/1) ... [2021-11-13 18:27:54,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:27:54,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:27:54,441 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_648041ce-5d13-4b83-bd52-dc10bafb3038/sv-benchmarks/c/systemc/toy1.cil.c[698,711] [2021-11-13 18:27:54,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:27:54,527 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:27:54,547 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_648041ce-5d13-4b83-bd52-dc10bafb3038/sv-benchmarks/c/systemc/toy1.cil.c[698,711] [2021-11-13 18:27:54,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:27:54,630 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:27:54,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:54 WrapperNode [2021-11-13 18:27:54,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:27:54,632 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:27:54,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:27:54,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:27:54,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:54" (1/1) ... [2021-11-13 18:27:54,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:54" (1/1) ... [2021-11-13 18:27:54,706 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:27:54,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:27:54,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:27:54,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:27:54,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:54" (1/1) ... [2021-11-13 18:27:54,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:54" (1/1) ... [2021-11-13 18:27:54,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:54" (1/1) ... [2021-11-13 18:27:54,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:54" (1/1) ... [2021-11-13 18:27:54,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:54" (1/1) ... [2021-11-13 18:27:54,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:54" (1/1) ... [2021-11-13 18:27:54,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:54" (1/1) ... [2021-11-13 18:27:54,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:27:54,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:27:54,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:27:54,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:27:54,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:54" (1/1) ... [2021-11-13 18:27:54,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:27:54,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:27:54,819 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:27:54,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:27:54,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:27:54,861 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-13 18:27:54,861 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-13 18:27:54,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:27:54,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:27:54,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:27:55,632 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:27:55,640 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-13 18:27:55,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:27:55 BoogieIcfgContainer [2021-11-13 18:27:55,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:27:55,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:27:55,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:27:55,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:27:55,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:27:54" (1/3) ... [2021-11-13 18:27:55,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31263d4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:27:55, skipping insertion in model container [2021-11-13 18:27:55,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:27:54" (2/3) ... [2021-11-13 18:27:55,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31263d4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:27:55, skipping insertion in model container [2021-11-13 18:27:55,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:27:55" (3/3) ... [2021-11-13 18:27:55,662 INFO L111 eAbstractionObserver]: Analyzing ICFG toy1.cil.c [2021-11-13 18:27:55,668 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:27:55,668 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:27:55,739 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:27:55,752 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 [2021-11-13 18:27:55,753 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:27:55,794 INFO L276 IsEmpty]: Start isEmpty. Operand has 136 states, 131 states have (on average 1.8396946564885497) internal successors, (241), 134 states have internal predecessors, (241), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:27:55,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:27:55,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:55,806 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:55,807 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:55,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:55,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1999309542, now seen corresponding path program 1 times [2021-11-13 18:27:55,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:27:55,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258823572] [2021-11-13 18:27:55,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:55,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:27:55,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:27:55,835 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:27:55,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:27:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:55,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:27:55,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:27:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:56,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:27:56,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:56,304 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:27:56,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258823572] [2021-11-13 18:27:56,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258823572] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:56,305 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:56,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:27:56,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542866681] [2021-11-13 18:27:56,308 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:56,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:56,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:27:56,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:56,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:56,354 INFO L87 Difference]: Start difference. First operand has 136 states, 131 states have (on average 1.8396946564885497) internal successors, (241), 134 states have internal predecessors, (241), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:56,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:56,442 INFO L93 Difference]: Finished difference Result 262 states and 476 transitions. [2021-11-13 18:27:56,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:56,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:27:56,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:56,467 INFO L225 Difference]: With dead ends: 262 [2021-11-13 18:27:56,467 INFO L226 Difference]: Without dead ends: 130 [2021-11-13 18:27:56,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:56,477 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 223 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.86ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.49ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:56,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 227 Invalid, 2 Unknown, 0 Unchecked, 8.86ms Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 12.49ms Time] [2021-11-13 18:27:56,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-13 18:27:56,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-13 18:27:56,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 127 states have (on average 1.7480314960629921) internal successors, (222), 128 states have internal predecessors, (222), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:56,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 224 transitions. [2021-11-13 18:27:56,556 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 224 transitions. Word has length 37 [2021-11-13 18:27:56,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:56,557 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 224 transitions. [2021-11-13 18:27:56,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:56,559 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 224 transitions. [2021-11-13 18:27:56,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:27:56,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:56,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:56,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:27:56,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:27:56,785 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:56,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:56,786 INFO L85 PathProgramCache]: Analyzing trace with hash 2020898140, now seen corresponding path program 1 times [2021-11-13 18:27:56,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:27:56,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211833488] [2021-11-13 18:27:56,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:56,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:27:56,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:27:56,793 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:27:56,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:27:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:56,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:27:56,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:27:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:56,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:27:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:57,067 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:27:57,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211833488] [2021-11-13 18:27:57,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211833488] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:57,068 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:57,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:27:57,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068909869] [2021-11-13 18:27:57,073 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:57,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:57,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:27:57,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:57,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:57,077 INFO L87 Difference]: Start difference. First operand 130 states and 224 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:57,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:57,115 INFO L93 Difference]: Finished difference Result 250 states and 432 transitions. [2021-11-13 18:27:57,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:57,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:27:57,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:57,118 INFO L225 Difference]: With dead ends: 250 [2021-11-13 18:27:57,118 INFO L226 Difference]: Without dead ends: 130 [2021-11-13 18:27:57,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:57,120 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 430 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.78ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.57ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:57,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 222 Invalid, 5 Unknown, 0 Unchecked, 3.78ms Time], IncrementalHoareTripleChecker [4 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 11.57ms Time] [2021-11-13 18:27:57,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-13 18:27:57,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-13 18:27:57,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 127 states have (on average 1.7401574803149606) internal successors, (221), 128 states have internal predecessors, (221), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:57,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 223 transitions. [2021-11-13 18:27:57,135 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 223 transitions. Word has length 37 [2021-11-13 18:27:57,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:57,136 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 223 transitions. [2021-11-13 18:27:57,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:57,136 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 223 transitions. [2021-11-13 18:27:57,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:27:57,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:57,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:57,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:27:57,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:27:57,351 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:57,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:57,353 INFO L85 PathProgramCache]: Analyzing trace with hash 2043530394, now seen corresponding path program 1 times [2021-11-13 18:27:57,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:27:57,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302479004] [2021-11-13 18:27:57,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:57,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:27:57,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:27:57,356 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:27:57,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:27:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:57,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:27:57,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:27:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:57,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:27:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:57,622 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:27:57,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302479004] [2021-11-13 18:27:57,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302479004] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:57,626 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:57,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:27:57,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559748196] [2021-11-13 18:27:57,626 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:57,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:57,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:27:57,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:57,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:57,631 INFO L87 Difference]: Start difference. First operand 130 states and 223 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:57,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:57,676 INFO L93 Difference]: Finished difference Result 249 states and 429 transitions. [2021-11-13 18:27:57,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:27:57,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:27:57,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:57,678 INFO L225 Difference]: With dead ends: 249 [2021-11-13 18:27:57,678 INFO L226 Difference]: Without dead ends: 130 [2021-11-13 18:27:57,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:57,681 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 205 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.61ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.59ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:57,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 207 Invalid, 28 Unknown, 0 Unchecked, 1.61ms Time], IncrementalHoareTripleChecker [9 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 28.59ms Time] [2021-11-13 18:27:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-13 18:27:57,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-13 18:27:57,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 127 states have (on average 1.6771653543307086) internal successors, (213), 128 states have internal predecessors, (213), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:57,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 215 transitions. [2021-11-13 18:27:57,694 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 215 transitions. Word has length 37 [2021-11-13 18:27:57,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:57,694 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 215 transitions. [2021-11-13 18:27:57,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:57,695 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 215 transitions. [2021-11-13 18:27:57,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:27:57,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:57,697 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:57,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:27:57,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:27:57,908 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:57,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:57,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1841385886, now seen corresponding path program 1 times [2021-11-13 18:27:57,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:27:57,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256925264] [2021-11-13 18:27:57,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:57,910 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:27:57,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:27:57,911 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:27:57,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:27:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:57,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:27:57,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:27:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:58,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:27:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:58,161 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:27:58,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256925264] [2021-11-13 18:27:58,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256925264] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:58,161 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:58,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:27:58,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025044434] [2021-11-13 18:27:58,162 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:58,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:58,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:27:58,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:58,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:58,165 INFO L87 Difference]: Start difference. First operand 130 states and 215 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:58,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:58,218 INFO L93 Difference]: Finished difference Result 248 states and 412 transitions. [2021-11-13 18:27:58,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:27:58,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:27:58,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:58,221 INFO L225 Difference]: With dead ends: 248 [2021-11-13 18:27:58,221 INFO L226 Difference]: Without dead ends: 130 [2021-11-13 18:27:58,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:58,232 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 382 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.50ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.17ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:58,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 203 Invalid, 30 Unknown, 0 Unchecked, 5.50ms Time], IncrementalHoareTripleChecker [13 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 36.17ms Time] [2021-11-13 18:27:58,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-13 18:27:58,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-13 18:27:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 127 states have (on average 1.6299212598425197) internal successors, (207), 128 states have internal predecessors, (207), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 209 transitions. [2021-11-13 18:27:58,257 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 209 transitions. Word has length 37 [2021-11-13 18:27:58,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:58,258 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 209 transitions. [2021-11-13 18:27:58,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:58,258 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 209 transitions. [2021-11-13 18:27:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:27:58,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:58,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:58,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:27:58,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:27:58,472 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:58,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:58,473 INFO L85 PathProgramCache]: Analyzing trace with hash 310844442, now seen corresponding path program 1 times [2021-11-13 18:27:58,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:27:58,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603874285] [2021-11-13 18:27:58,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:58,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:27:58,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:27:58,475 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:27:58,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:27:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:58,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:27:58,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:27:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:58,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:27:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:58,737 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:27:58,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603874285] [2021-11-13 18:27:58,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603874285] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:58,737 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:58,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:27:58,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251796754] [2021-11-13 18:27:58,738 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:58,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:58,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:27:58,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:58,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:58,740 INFO L87 Difference]: Start difference. First operand 130 states and 209 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:58,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:58,790 INFO L93 Difference]: Finished difference Result 247 states and 399 transitions. [2021-11-13 18:27:58,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:27:58,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:27:58,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:58,792 INFO L225 Difference]: With dead ends: 247 [2021-11-13 18:27:58,793 INFO L226 Difference]: Without dead ends: 130 [2021-11-13 18:27:58,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:58,794 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 372 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.47ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.95ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:58,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 201 Invalid, 22 Unknown, 0 Unchecked, 3.47ms Time], IncrementalHoareTripleChecker [10 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 27.95ms Time] [2021-11-13 18:27:58,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-13 18:27:58,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-13 18:27:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 127 states have (on average 1.5826771653543308) internal successors, (201), 128 states have internal predecessors, (201), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:58,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 203 transitions. [2021-11-13 18:27:58,806 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 203 transitions. Word has length 37 [2021-11-13 18:27:58,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:58,807 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 203 transitions. [2021-11-13 18:27:58,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:58,807 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 203 transitions. [2021-11-13 18:27:58,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:27:58,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:58,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:58,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:27:59,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:27:59,020 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:59,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:59,021 INFO L85 PathProgramCache]: Analyzing trace with hash 239927770, now seen corresponding path program 1 times [2021-11-13 18:27:59,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:27:59,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637273701] [2021-11-13 18:27:59,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:59,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:27:59,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:27:59,022 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:27:59,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 18:27:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:59,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:27:59,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:27:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:59,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:27:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:59,284 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:27:59,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637273701] [2021-11-13 18:27:59,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637273701] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:59,284 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:59,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:27:59,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205162479] [2021-11-13 18:27:59,285 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:59,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:59,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:27:59,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:59,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:59,286 INFO L87 Difference]: Start difference. First operand 130 states and 203 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:59,377 INFO L93 Difference]: Finished difference Result 378 states and 590 transitions. [2021-11-13 18:27:59,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:27:59,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:27:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:59,382 INFO L225 Difference]: With dead ends: 378 [2021-11-13 18:27:59,382 INFO L226 Difference]: Without dead ends: 262 [2021-11-13 18:27:59,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:59,384 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 545 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.75ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.91ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:59,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 382 Invalid, 41 Unknown, 0 Unchecked, 2.75ms Time], IncrementalHoareTripleChecker [16 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 66.91ms Time] [2021-11-13 18:27:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-13 18:27:59,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 258. [2021-11-13 18:27:59,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 255 states have (on average 1.5490196078431373) internal successors, (395), 256 states have internal predecessors, (395), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 397 transitions. [2021-11-13 18:27:59,441 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 397 transitions. Word has length 37 [2021-11-13 18:27:59,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:59,442 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 397 transitions. [2021-11-13 18:27:59,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:59,442 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 397 transitions. [2021-11-13 18:27:59,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:27:59,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:59,444 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:59,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:27:59,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:27:59,648 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:59,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:59,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1628127260, now seen corresponding path program 1 times [2021-11-13 18:27:59,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:27:59,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045035459] [2021-11-13 18:27:59,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:59,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:27:59,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:27:59,650 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:27:59,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 18:27:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:59,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:27:59,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:27:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:59,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:27:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:59,871 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:27:59,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045035459] [2021-11-13 18:27:59,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045035459] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:59,871 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:59,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:27:59,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223676409] [2021-11-13 18:27:59,872 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:59,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:59,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:27:59,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:59,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:59,873 INFO L87 Difference]: Start difference. First operand 258 states and 397 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:59,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:59,964 INFO L93 Difference]: Finished difference Result 844 states and 1311 transitions. [2021-11-13 18:27:59,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:27:59,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:27:59,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:59,972 INFO L225 Difference]: With dead ends: 844 [2021-11-13 18:27:59,973 INFO L226 Difference]: Without dead ends: 612 [2021-11-13 18:27:59,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:59,975 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 515 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.25ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.54ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:59,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 452 Invalid, 38 Unknown, 0 Unchecked, 4.25ms Time], IncrementalHoareTripleChecker [14 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 38.54ms Time] [2021-11-13 18:27:59,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-13 18:28:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 600. [2021-11-13 18:28:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 597 states have (on average 1.5460636515912898) internal successors, (923), 598 states have internal predecessors, (923), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:00,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 925 transitions. [2021-11-13 18:28:00,054 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 925 transitions. Word has length 37 [2021-11-13 18:28:00,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:00,054 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 925 transitions. [2021-11-13 18:28:00,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:00,055 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 925 transitions. [2021-11-13 18:28:00,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:28:00,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:00,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:00,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:00,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:00,272 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:00,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:00,272 INFO L85 PathProgramCache]: Analyzing trace with hash 757558620, now seen corresponding path program 1 times [2021-11-13 18:28:00,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:00,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660862848] [2021-11-13 18:28:00,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:00,273 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:00,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:00,274 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:00,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 18:28:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:00,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:00,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:00,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:00,517 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:00,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660862848] [2021-11-13 18:28:00,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660862848] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:00,517 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:00,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:28:00,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398020443] [2021-11-13 18:28:00,518 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:00,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:28:00,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:00,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:28:00,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:00,520 INFO L87 Difference]: Start difference. First operand 600 states and 925 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:00,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:00,599 INFO L93 Difference]: Finished difference Result 1328 states and 2052 transitions. [2021-11-13 18:28:00,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:28:00,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 18:28:00,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:00,605 INFO L225 Difference]: With dead ends: 1328 [2021-11-13 18:28:00,605 INFO L226 Difference]: Without dead ends: 756 [2021-11-13 18:28:00,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:00,607 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 125 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.40ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.85ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:00,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 329 Invalid, 30 Unknown, 0 Unchecked, 1.40ms Time], IncrementalHoareTripleChecker [8 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 32.85ms Time] [2021-11-13 18:28:00,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-11-13 18:28:00,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 754. [2021-11-13 18:28:00,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 751 states have (on average 1.5286284953395473) internal successors, (1148), 752 states have internal predecessors, (1148), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:00,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1150 transitions. [2021-11-13 18:28:00,677 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1150 transitions. Word has length 37 [2021-11-13 18:28:00,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:00,679 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1150 transitions. [2021-11-13 18:28:00,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:00,679 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1150 transitions. [2021-11-13 18:28:00,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-13 18:28:00,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:00,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:00,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:00,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:00,897 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:00,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:00,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1472514580, now seen corresponding path program 1 times [2021-11-13 18:28:00,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:00,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406053875] [2021-11-13 18:28:00,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:00,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:00,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:00,899 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:00,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 18:28:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:00,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:00,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:01,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:01,165 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:01,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406053875] [2021-11-13 18:28:01,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406053875] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:01,166 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:01,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:28:01,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011427413] [2021-11-13 18:28:01,166 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:01,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:28:01,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:01,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:28:01,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:01,168 INFO L87 Difference]: Start difference. First operand 754 states and 1150 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:01,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:01,254 INFO L93 Difference]: Finished difference Result 1868 states and 2879 transitions. [2021-11-13 18:28:01,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:28:01,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-13 18:28:01,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:01,262 INFO L225 Difference]: With dead ends: 1868 [2021-11-13 18:28:01,262 INFO L226 Difference]: Without dead ends: 1168 [2021-11-13 18:28:01,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:01,264 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 93 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.52ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.63ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:01,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 439 Invalid, 14 Unknown, 0 Unchecked, 1.52ms Time], IncrementalHoareTripleChecker [6 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 16.63ms Time] [2021-11-13 18:28:01,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-11-13 18:28:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1164. [2021-11-13 18:28:01,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1161 states have (on average 1.5322997416020672) internal successors, (1779), 1162 states have internal predecessors, (1779), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 1781 transitions. [2021-11-13 18:28:01,342 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 1781 transitions. Word has length 48 [2021-11-13 18:28:01,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:01,343 INFO L470 AbstractCegarLoop]: Abstraction has 1164 states and 1781 transitions. [2021-11-13 18:28:01,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:01,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 1781 transitions. [2021-11-13 18:28:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-13 18:28:01,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:01,345 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:01,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:01,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:01,556 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:01,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:01,557 INFO L85 PathProgramCache]: Analyzing trace with hash -576873262, now seen corresponding path program 1 times [2021-11-13 18:28:01,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:01,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454213978] [2021-11-13 18:28:01,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:01,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:01,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:01,559 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:01,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 18:28:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:01,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:28:01,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:28:01,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:28:01,796 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:01,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454213978] [2021-11-13 18:28:01,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454213978] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:01,796 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:01,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:28:01,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943877622] [2021-11-13 18:28:01,797 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:01,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:28:01,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:01,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:28:01,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:01,798 INFO L87 Difference]: Start difference. First operand 1164 states and 1781 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:01,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:01,886 INFO L93 Difference]: Finished difference Result 2230 states and 3436 transitions. [2021-11-13 18:28:01,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:28:01,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-13 18:28:01,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:01,893 INFO L225 Difference]: With dead ends: 2230 [2021-11-13 18:28:01,894 INFO L226 Difference]: Without dead ends: 1120 [2021-11-13 18:28:01,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:01,896 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 191 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.38ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.61ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:01,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 194 Invalid, 2 Unknown, 0 Unchecked, 1.38ms Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 8.61ms Time] [2021-11-13 18:28:01,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-11-13 18:28:01,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1120. [2021-11-13 18:28:01,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1117 states have (on average 1.541629364368845) internal successors, (1722), 1118 states have internal predecessors, (1722), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1724 transitions. [2021-11-13 18:28:01,991 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1724 transitions. Word has length 48 [2021-11-13 18:28:01,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:01,991 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1724 transitions. [2021-11-13 18:28:01,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:01,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1724 transitions. [2021-11-13 18:28:01,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-13 18:28:01,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:01,994 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:02,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:02,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:02,205 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:02,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:02,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1940711686, now seen corresponding path program 1 times [2021-11-13 18:28:02,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:02,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871266631] [2021-11-13 18:28:02,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:02,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:02,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:02,207 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:02,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 18:28:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:02,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:02,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:02,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:02,476 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:02,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871266631] [2021-11-13 18:28:02,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871266631] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:02,477 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:02,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:28:02,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173495986] [2021-11-13 18:28:02,477 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:02,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:28:02,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:02,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:28:02,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:02,479 INFO L87 Difference]: Start difference. First operand 1120 states and 1724 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:02,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:02,605 INFO L93 Difference]: Finished difference Result 2842 states and 4430 transitions. [2021-11-13 18:28:02,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:28:02,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-13 18:28:02,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:02,618 INFO L225 Difference]: With dead ends: 2842 [2021-11-13 18:28:02,618 INFO L226 Difference]: Without dead ends: 1776 [2021-11-13 18:28:02,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:02,621 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 94 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.79ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:02,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 339 Invalid, 14 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 17.79ms Time] [2021-11-13 18:28:02,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-11-13 18:28:02,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1772. [2021-11-13 18:28:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1769 states have (on average 1.552289429055964) internal successors, (2746), 1770 states have internal predecessors, (2746), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2748 transitions. [2021-11-13 18:28:02,755 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2748 transitions. Word has length 49 [2021-11-13 18:28:02,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:02,755 INFO L470 AbstractCegarLoop]: Abstraction has 1772 states and 2748 transitions. [2021-11-13 18:28:02,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:02,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2748 transitions. [2021-11-13 18:28:02,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-13 18:28:02,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:02,758 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:02,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:02,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:02,969 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:02,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:02,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1304018632, now seen corresponding path program 1 times [2021-11-13 18:28:02,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:02,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266108159] [2021-11-13 18:28:02,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:02,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:02,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:02,971 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:02,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 18:28:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:03,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:03,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:03,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:03,257 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:03,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266108159] [2021-11-13 18:28:03,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266108159] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:03,258 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:03,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:28:03,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486709860] [2021-11-13 18:28:03,259 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:03,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:28:03,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:03,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:28:03,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:03,260 INFO L87 Difference]: Start difference. First operand 1772 states and 2748 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:03,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:03,466 INFO L93 Difference]: Finished difference Result 4762 states and 7483 transitions. [2021-11-13 18:28:03,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:28:03,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-13 18:28:03,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:03,486 INFO L225 Difference]: With dead ends: 4762 [2021-11-13 18:28:03,486 INFO L226 Difference]: Without dead ends: 3048 [2021-11-13 18:28:03,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:03,490 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 98 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.71ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:03,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 410 Invalid, 17 Unknown, 0 Unchecked, 1.71ms Time], IncrementalHoareTripleChecker [9 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 23.28ms Time] [2021-11-13 18:28:03,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3048 states. [2021-11-13 18:28:03,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3048 to 3044. [2021-11-13 18:28:03,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 3041 states have (on average 1.5662610983229202) internal successors, (4763), 3042 states have internal predecessors, (4763), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:03,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 4765 transitions. [2021-11-13 18:28:03,714 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 4765 transitions. Word has length 50 [2021-11-13 18:28:03,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:03,714 INFO L470 AbstractCegarLoop]: Abstraction has 3044 states and 4765 transitions. [2021-11-13 18:28:03,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:03,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 4765 transitions. [2021-11-13 18:28:03,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-13 18:28:03,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:03,718 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:03,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:03,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:03,930 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:03,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:03,930 INFO L85 PathProgramCache]: Analyzing trace with hash -745369210, now seen corresponding path program 1 times [2021-11-13 18:28:03,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:03,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513628508] [2021-11-13 18:28:03,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:03,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:03,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:03,932 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:03,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 18:28:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:03,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:03,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:28:04,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:28:04,178 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:04,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513628508] [2021-11-13 18:28:04,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513628508] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:04,179 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:04,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:28:04,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306509800] [2021-11-13 18:28:04,179 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:04,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:28:04,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:04,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:28:04,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:04,181 INFO L87 Difference]: Start difference. First operand 3044 states and 4765 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:04,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:04,393 INFO L93 Difference]: Finished difference Result 5986 states and 9404 transitions. [2021-11-13 18:28:04,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:28:04,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-13 18:28:04,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:04,412 INFO L225 Difference]: With dead ends: 5986 [2021-11-13 18:28:04,412 INFO L226 Difference]: Without dead ends: 3000 [2021-11-13 18:28:04,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:04,417 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 188 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.22ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.43ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:04,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 193 Invalid, 2 Unknown, 0 Unchecked, 1.22ms Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 8.43ms Time] [2021-11-13 18:28:04,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-11-13 18:28:04,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 3000. [2021-11-13 18:28:04,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3000 states, 2997 states have (on average 1.5709042375709041) internal successors, (4708), 2998 states have internal predecessors, (4708), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:04,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3000 states to 3000 states and 4710 transitions. [2021-11-13 18:28:04,671 INFO L78 Accepts]: Start accepts. Automaton has 3000 states and 4710 transitions. Word has length 50 [2021-11-13 18:28:04,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:04,671 INFO L470 AbstractCegarLoop]: Abstraction has 3000 states and 4710 transitions. [2021-11-13 18:28:04,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:04,672 INFO L276 IsEmpty]: Start isEmpty. Operand 3000 states and 4710 transitions. [2021-11-13 18:28:04,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 18:28:04,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:04,675 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:04,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:04,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:04,891 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:04,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:04,892 INFO L85 PathProgramCache]: Analyzing trace with hash 251128390, now seen corresponding path program 1 times [2021-11-13 18:28:04,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:04,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258343842] [2021-11-13 18:28:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:04,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:04,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:04,893 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:04,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 18:28:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:04,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:04,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:05,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:05,140 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:05,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258343842] [2021-11-13 18:28:05,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258343842] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:05,141 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:05,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:28:05,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995109516] [2021-11-13 18:28:05,141 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:05,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:28:05,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:05,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:28:05,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:28:05,143 INFO L87 Difference]: Start difference. First operand 3000 states and 4710 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:05,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:05,613 INFO L93 Difference]: Finished difference Result 9878 states and 15470 transitions. [2021-11-13 18:28:05,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:28:05,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-13 18:28:05,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:05,652 INFO L225 Difference]: With dead ends: 9878 [2021-11-13 18:28:05,652 INFO L226 Difference]: Without dead ends: 5850 [2021-11-13 18:28:05,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:28:05,659 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 275 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.32ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.99ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:05,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 625 Invalid, 37 Unknown, 0 Unchecked, 3.32ms Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 45.99ms Time] [2021-11-13 18:28:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5850 states. [2021-11-13 18:28:05,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5850 to 4246. [2021-11-13 18:28:05,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4246 states, 4243 states have (on average 1.5547961348102757) internal successors, (6597), 4244 states have internal predecessors, (6597), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:06,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4246 states to 4246 states and 6599 transitions. [2021-11-13 18:28:06,016 INFO L78 Accepts]: Start accepts. Automaton has 4246 states and 6599 transitions. Word has length 51 [2021-11-13 18:28:06,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:06,018 INFO L470 AbstractCegarLoop]: Abstraction has 4246 states and 6599 transitions. [2021-11-13 18:28:06,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:06,018 INFO L276 IsEmpty]: Start isEmpty. Operand 4246 states and 6599 transitions. [2021-11-13 18:28:06,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 18:28:06,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:06,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:06,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-13 18:28:06,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:06,233 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:06,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:06,233 INFO L85 PathProgramCache]: Analyzing trace with hash -395368922, now seen corresponding path program 1 times [2021-11-13 18:28:06,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:06,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331949997] [2021-11-13 18:28:06,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:06,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:06,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:06,235 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:06,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 18:28:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:06,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:06,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:06,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:06,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:06,590 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:06,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331949997] [2021-11-13 18:28:06,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331949997] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:06,591 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:06,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:28:06,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037441598] [2021-11-13 18:28:06,591 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:06,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:28:06,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:06,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:28:06,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:28:06,593 INFO L87 Difference]: Start difference. First operand 4246 states and 6599 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:07,175 INFO L93 Difference]: Finished difference Result 13924 states and 21512 transitions. [2021-11-13 18:28:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:28:07,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-13 18:28:07,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:07,243 INFO L225 Difference]: With dead ends: 13924 [2021-11-13 18:28:07,243 INFO L226 Difference]: Without dead ends: 9728 [2021-11-13 18:28:07,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:28:07,254 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 266 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.58ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.84ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:07,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 536 Invalid, 30 Unknown, 0 Unchecked, 2.58ms Time], IncrementalHoareTripleChecker [8 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 31.84ms Time] [2021-11-13 18:28:07,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9728 states. [2021-11-13 18:28:07,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9728 to 6874. [2021-11-13 18:28:07,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6874 states, 6871 states have (on average 1.5262698297191093) internal successors, (10487), 6872 states have internal predecessors, (10487), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:07,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6874 states to 6874 states and 10489 transitions. [2021-11-13 18:28:07,805 INFO L78 Accepts]: Start accepts. Automaton has 6874 states and 10489 transitions. Word has length 56 [2021-11-13 18:28:07,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:07,805 INFO L470 AbstractCegarLoop]: Abstraction has 6874 states and 10489 transitions. [2021-11-13 18:28:07,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 6874 states and 10489 transitions. [2021-11-13 18:28:07,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 18:28:07,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:07,812 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:07,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:08,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:08,026 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:08,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:08,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1986352653, now seen corresponding path program 1 times [2021-11-13 18:28:08,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:08,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884962652] [2021-11-13 18:28:08,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:08,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:08,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:08,029 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:08,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 18:28:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:08,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:08,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:28:08,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:28:08,343 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:08,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884962652] [2021-11-13 18:28:08,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884962652] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:08,343 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:08,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:28:08,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856237944] [2021-11-13 18:28:08,344 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:08,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:28:08,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:08,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:28:08,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:28:08,346 INFO L87 Difference]: Start difference. First operand 6874 states and 10489 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:09,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:09,451 INFO L93 Difference]: Finished difference Result 24960 states and 38398 transitions. [2021-11-13 18:28:09,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:28:09,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-13 18:28:09,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:09,501 INFO L225 Difference]: With dead ends: 24960 [2021-11-13 18:28:09,502 INFO L226 Difference]: Without dead ends: 18089 [2021-11-13 18:28:09,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:28:09,514 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 505 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.93ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.74ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:09,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 439 Invalid, 17 Unknown, 0 Unchecked, 2.93ms Time], IncrementalHoareTripleChecker [9 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 20.74ms Time] [2021-11-13 18:28:09,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18089 states. [2021-11-13 18:28:10,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18089 to 12017. [2021-11-13 18:28:10,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12017 states, 12014 states have (on average 1.5474446479107709) internal successors, (18591), 12015 states have internal predecessors, (18591), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12017 states to 12017 states and 18593 transitions. [2021-11-13 18:28:10,508 INFO L78 Accepts]: Start accepts. Automaton has 12017 states and 18593 transitions. Word has length 58 [2021-11-13 18:28:10,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:10,509 INFO L470 AbstractCegarLoop]: Abstraction has 12017 states and 18593 transitions. [2021-11-13 18:28:10,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:10,510 INFO L276 IsEmpty]: Start isEmpty. Operand 12017 states and 18593 transitions. [2021-11-13 18:28:10,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-13 18:28:10,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:10,517 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:10,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:10,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:10,729 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:10,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:10,730 INFO L85 PathProgramCache]: Analyzing trace with hash -846224771, now seen corresponding path program 1 times [2021-11-13 18:28:10,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:10,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697019320] [2021-11-13 18:28:10,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:10,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:10,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:10,732 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:10,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 18:28:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:10,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:10,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:10,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:11,170 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:11,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697019320] [2021-11-13 18:28:11,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697019320] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:11,171 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:11,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:28:11,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199269998] [2021-11-13 18:28:11,172 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:11,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:28:11,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:11,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:28:11,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:11,174 INFO L87 Difference]: Start difference. First operand 12017 states and 18593 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:11,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:11,850 INFO L93 Difference]: Finished difference Result 24381 states and 37676 transitions. [2021-11-13 18:28:11,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:28:11,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-13 18:28:11,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:11,882 INFO L225 Difference]: With dead ends: 24381 [2021-11-13 18:28:11,883 INFO L226 Difference]: Without dead ends: 12393 [2021-11-13 18:28:11,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:11,899 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 133 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.53ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:11,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 316 Invalid, 15 Unknown, 0 Unchecked, 1.53ms Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 22.60ms Time] [2021-11-13 18:28:11,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12393 states. [2021-11-13 18:28:12,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12393 to 12361. [2021-11-13 18:28:12,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12361 states, 12358 states have (on average 1.5008091924259588) internal successors, (18547), 12359 states have internal predecessors, (18547), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:12,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12361 states to 12361 states and 18549 transitions. [2021-11-13 18:28:12,603 INFO L78 Accepts]: Start accepts. Automaton has 12361 states and 18549 transitions. Word has length 91 [2021-11-13 18:28:12,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:12,604 INFO L470 AbstractCegarLoop]: Abstraction has 12361 states and 18549 transitions. [2021-11-13 18:28:12,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:12,604 INFO L276 IsEmpty]: Start isEmpty. Operand 12361 states and 18549 transitions. [2021-11-13 18:28:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-13 18:28:12,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:12,610 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:12,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:12,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:12,829 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:12,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:12,830 INFO L85 PathProgramCache]: Analyzing trace with hash 692618235, now seen corresponding path program 1 times [2021-11-13 18:28:12,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:12,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [290755766] [2021-11-13 18:28:12,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:12,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:12,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:12,831 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:12,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 18:28:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:12,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:12,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:13,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:13,225 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:13,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [290755766] [2021-11-13 18:28:13,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [290755766] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:13,225 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:13,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:28:13,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516373719] [2021-11-13 18:28:13,226 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:13,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:28:13,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:13,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:28:13,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:13,228 INFO L87 Difference]: Start difference. First operand 12361 states and 18549 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:13,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:13,936 INFO L93 Difference]: Finished difference Result 25235 states and 37808 transitions. [2021-11-13 18:28:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:28:13,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-13 18:28:13,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:13,975 INFO L225 Difference]: With dead ends: 25235 [2021-11-13 18:28:13,976 INFO L226 Difference]: Without dead ends: 12915 [2021-11-13 18:28:13,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:13,998 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 132 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.77ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.21ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:13,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 315 Invalid, 15 Unknown, 0 Unchecked, 1.77ms Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 66.21ms Time] [2021-11-13 18:28:14,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12915 states. [2021-11-13 18:28:14,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12915 to 12867. [2021-11-13 18:28:14,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12867 states, 12864 states have (on average 1.4540578358208955) internal successors, (18705), 12865 states have internal predecessors, (18705), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:14,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12867 states to 12867 states and 18707 transitions. [2021-11-13 18:28:14,749 INFO L78 Accepts]: Start accepts. Automaton has 12867 states and 18707 transitions. Word has length 92 [2021-11-13 18:28:14,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:14,750 INFO L470 AbstractCegarLoop]: Abstraction has 12867 states and 18707 transitions. [2021-11-13 18:28:14,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:14,750 INFO L276 IsEmpty]: Start isEmpty. Operand 12867 states and 18707 transitions. [2021-11-13 18:28:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-13 18:28:14,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:14,757 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:14,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:14,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:14,970 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:14,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:14,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1736291809, now seen corresponding path program 1 times [2021-11-13 18:28:14,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:14,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408971273] [2021-11-13 18:28:14,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:14,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:14,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:14,972 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:14,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 18:28:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:15,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:15,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:15,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:15,393 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:15,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408971273] [2021-11-13 18:28:15,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408971273] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:15,393 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:15,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:28:15,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744251833] [2021-11-13 18:28:15,394 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:15,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:28:15,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:15,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:28:15,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:15,395 INFO L87 Difference]: Start difference. First operand 12867 states and 18707 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:16,035 INFO L93 Difference]: Finished difference Result 25826 states and 37650 transitions. [2021-11-13 18:28:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:28:16,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-13 18:28:16,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:16,058 INFO L225 Difference]: With dead ends: 25826 [2021-11-13 18:28:16,058 INFO L226 Difference]: Without dead ends: 13020 [2021-11-13 18:28:16,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:16,073 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 128 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.37ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.79ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:16,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 312 Invalid, 21 Unknown, 0 Unchecked, 2.37ms Time], IncrementalHoareTripleChecker [8 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 28.79ms Time] [2021-11-13 18:28:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13020 states. [2021-11-13 18:28:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13020 to 9926. [2021-11-13 18:28:16,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9926 states, 9923 states have (on average 1.3992744129799455) internal successors, (13885), 9924 states have internal predecessors, (13885), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:16,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9926 states to 9926 states and 13887 transitions. [2021-11-13 18:28:16,665 INFO L78 Accepts]: Start accepts. Automaton has 9926 states and 13887 transitions. Word has length 93 [2021-11-13 18:28:16,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:16,665 INFO L470 AbstractCegarLoop]: Abstraction has 9926 states and 13887 transitions. [2021-11-13 18:28:16,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:16,665 INFO L276 IsEmpty]: Start isEmpty. Operand 9926 states and 13887 transitions. [2021-11-13 18:28:16,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-13 18:28:16,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:16,672 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:16,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:16,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:16,883 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:16,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:16,883 INFO L85 PathProgramCache]: Analyzing trace with hash -370455463, now seen corresponding path program 1 times [2021-11-13 18:28:16,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:16,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264777742] [2021-11-13 18:28:16,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:16,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:16,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:16,885 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:16,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 18:28:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:16,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:16,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:28:17,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:28:17,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:17,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264777742] [2021-11-13 18:28:17,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264777742] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:17,255 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:17,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:28:17,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473695316] [2021-11-13 18:28:17,256 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:17,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:28:17,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:17,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:28:17,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:28:17,257 INFO L87 Difference]: Start difference. First operand 9926 states and 13887 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:17,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:17,888 INFO L93 Difference]: Finished difference Result 23180 states and 32050 transitions. [2021-11-13 18:28:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:28:17,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-13 18:28:17,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:17,905 INFO L225 Difference]: With dead ends: 23180 [2021-11-13 18:28:17,905 INFO L226 Difference]: Without dead ends: 12102 [2021-11-13 18:28:17,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:28:17,916 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 228 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.07ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:17,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 528 Invalid, 57 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [17 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 56.07ms Time] [2021-11-13 18:28:17,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12102 states. [2021-11-13 18:28:18,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12102 to 11766. [2021-11-13 18:28:18,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11766 states, 11763 states have (on average 1.3245770636742327) internal successors, (15581), 11764 states have internal predecessors, (15581), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11766 states to 11766 states and 15583 transitions. [2021-11-13 18:28:18,502 INFO L78 Accepts]: Start accepts. Automaton has 11766 states and 15583 transitions. Word has length 94 [2021-11-13 18:28:18,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:18,502 INFO L470 AbstractCegarLoop]: Abstraction has 11766 states and 15583 transitions. [2021-11-13 18:28:18,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:18,502 INFO L276 IsEmpty]: Start isEmpty. Operand 11766 states and 15583 transitions. [2021-11-13 18:28:18,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:28:18,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:18,526 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:18,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-13 18:28:18,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:18,738 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:18,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:18,738 INFO L85 PathProgramCache]: Analyzing trace with hash -924986801, now seen corresponding path program 1 times [2021-11-13 18:28:18,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:18,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500575214] [2021-11-13 18:28:18,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:18,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:18,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:18,740 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:18,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 18:28:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:18,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:18,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:28:19,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:28:19,377 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:19,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500575214] [2021-11-13 18:28:19,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500575214] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:19,377 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:19,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:28:19,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663250768] [2021-11-13 18:28:19,378 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:19,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:28:19,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:19,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:28:19,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:19,380 INFO L87 Difference]: Start difference. First operand 11766 states and 15583 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:20,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:20,006 INFO L93 Difference]: Finished difference Result 23066 states and 30542 transitions. [2021-11-13 18:28:20,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:28:20,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-13 18:28:20,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:20,020 INFO L225 Difference]: With dead ends: 23066 [2021-11-13 18:28:20,020 INFO L226 Difference]: Without dead ends: 11712 [2021-11-13 18:28:20,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:20,031 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 34 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.08ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.08ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:20,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 315 Invalid, 14 Unknown, 0 Unchecked, 1.08ms Time], IncrementalHoareTripleChecker [4 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 19.08ms Time] [2021-11-13 18:28:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11712 states. [2021-11-13 18:28:20,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11712 to 11712. [2021-11-13 18:28:20,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11712 states, 11709 states have (on average 1.3216329319327014) internal successors, (15475), 11710 states have internal predecessors, (15475), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:20,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11712 states to 11712 states and 15477 transitions. [2021-11-13 18:28:20,719 INFO L78 Accepts]: Start accepts. Automaton has 11712 states and 15477 transitions. Word has length 123 [2021-11-13 18:28:20,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:20,720 INFO L470 AbstractCegarLoop]: Abstraction has 11712 states and 15477 transitions. [2021-11-13 18:28:20,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:20,720 INFO L276 IsEmpty]: Start isEmpty. Operand 11712 states and 15477 transitions. [2021-11-13 18:28:20,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-13 18:28:20,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:20,744 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:20,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:20,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:20,955 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:20,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:20,955 INFO L85 PathProgramCache]: Analyzing trace with hash -974943913, now seen corresponding path program 1 times [2021-11-13 18:28:20,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:20,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84478294] [2021-11-13 18:28:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:20,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:20,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:20,957 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:20,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 18:28:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:21,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:21,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:28:21,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:28:21,515 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:21,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84478294] [2021-11-13 18:28:21,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84478294] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:21,516 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:21,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:28:21,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735764888] [2021-11-13 18:28:21,516 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:21,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:28:21,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:21,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:28:21,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:28:21,518 INFO L87 Difference]: Start difference. First operand 11712 states and 15477 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:22,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:22,065 INFO L93 Difference]: Finished difference Result 22606 states and 29907 transitions. [2021-11-13 18:28:22,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:28:22,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-13 18:28:22,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:22,080 INFO L225 Difference]: With dead ends: 22606 [2021-11-13 18:28:22,080 INFO L226 Difference]: Without dead ends: 11600 [2021-11-13 18:28:22,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:28:22,090 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 251 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.38ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.24ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:22,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 339 Invalid, 15 Unknown, 0 Unchecked, 4.38ms Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 18.24ms Time] [2021-11-13 18:28:22,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11600 states. [2021-11-13 18:28:22,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11600 to 11596. [2021-11-13 18:28:22,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11596 states, 11593 states have (on average 1.2948330889329769) internal successors, (15011), 11594 states have internal predecessors, (15011), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:22,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11596 states to 11596 states and 15013 transitions. [2021-11-13 18:28:22,690 INFO L78 Accepts]: Start accepts. Automaton has 11596 states and 15013 transitions. Word has length 136 [2021-11-13 18:28:22,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:22,690 INFO L470 AbstractCegarLoop]: Abstraction has 11596 states and 15013 transitions. [2021-11-13 18:28:22,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:22,691 INFO L276 IsEmpty]: Start isEmpty. Operand 11596 states and 15013 transitions. [2021-11-13 18:28:22,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-13 18:28:22,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:22,703 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:22,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:22,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:22,915 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:22,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:22,915 INFO L85 PathProgramCache]: Analyzing trace with hash 45217767, now seen corresponding path program 1 times [2021-11-13 18:28:22,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:22,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116107444] [2021-11-13 18:28:22,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:22,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:22,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:22,917 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:22,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-13 18:28:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:23,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:23,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:23,228 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 18:28:23,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 18:28:23,458 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:23,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116107444] [2021-11-13 18:28:23,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116107444] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:23,458 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:23,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:28:23,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989103832] [2021-11-13 18:28:23,459 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:23,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:28:23,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:23,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:28:23,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:23,461 INFO L87 Difference]: Start difference. First operand 11596 states and 15013 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:23,885 INFO L93 Difference]: Finished difference Result 22773 states and 29478 transitions. [2021-11-13 18:28:23,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:28:23,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-13 18:28:23,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:23,898 INFO L225 Difference]: With dead ends: 22773 [2021-11-13 18:28:23,899 INFO L226 Difference]: Without dead ends: 11596 [2021-11-13 18:28:23,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:23,910 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 25 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.76ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.72ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:23,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 314 Invalid, 9 Unknown, 0 Unchecked, 0.76ms Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 13.72ms Time] [2021-11-13 18:28:23,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11596 states. [2021-11-13 18:28:24,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11596 to 11556. [2021-11-13 18:28:24,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11556 states, 11553 states have (on average 1.2922184713927118) internal successors, (14929), 11554 states have internal predecessors, (14929), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11556 states to 11556 states and 14931 transitions. [2021-11-13 18:28:24,492 INFO L78 Accepts]: Start accepts. Automaton has 11556 states and 14931 transitions. Word has length 142 [2021-11-13 18:28:24,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:24,492 INFO L470 AbstractCegarLoop]: Abstraction has 11556 states and 14931 transitions. [2021-11-13 18:28:24,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 11556 states and 14931 transitions. [2021-11-13 18:28:24,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-13 18:28:24,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:24,503 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:24,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:24,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:24,708 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:24,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:24,708 INFO L85 PathProgramCache]: Analyzing trace with hash -400505291, now seen corresponding path program 1 times [2021-11-13 18:28:24,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:24,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652621214] [2021-11-13 18:28:24,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:24,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:24,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:24,709 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:24,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 18:28:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:24,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:24,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:25,007 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 18:28:25,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 18:28:25,307 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:25,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652621214] [2021-11-13 18:28:25,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652621214] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:25,307 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:25,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:28:25,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287751028] [2021-11-13 18:28:25,307 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:25,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:28:25,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:25,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:28:25,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:25,308 INFO L87 Difference]: Start difference. First operand 11556 states and 14931 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:25,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:25,731 INFO L93 Difference]: Finished difference Result 22721 states and 29356 transitions. [2021-11-13 18:28:25,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:28:25,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-13 18:28:25,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:25,744 INFO L225 Difference]: With dead ends: 22721 [2021-11-13 18:28:25,744 INFO L226 Difference]: Without dead ends: 11565 [2021-11-13 18:28:25,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:25,756 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 21 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.86ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.88ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:25,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 313 Invalid, 9 Unknown, 0 Unchecked, 0.86ms Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 9.88ms Time] [2021-11-13 18:28:25,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11565 states. [2021-11-13 18:28:26,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11565 to 11525. [2021-11-13 18:28:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11525 states, 11522 states have (on average 1.289446276688075) internal successors, (14857), 11523 states have internal predecessors, (14857), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11525 states to 11525 states and 14859 transitions. [2021-11-13 18:28:26,213 INFO L78 Accepts]: Start accepts. Automaton has 11525 states and 14859 transitions. Word has length 142 [2021-11-13 18:28:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:26,213 INFO L470 AbstractCegarLoop]: Abstraction has 11525 states and 14859 transitions. [2021-11-13 18:28:26,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:26,214 INFO L276 IsEmpty]: Start isEmpty. Operand 11525 states and 14859 transitions. [2021-11-13 18:28:26,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 18:28:26,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:26,224 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:26,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-13 18:28:26,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:26,425 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:26,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:26,425 INFO L85 PathProgramCache]: Analyzing trace with hash 428342766, now seen corresponding path program 1 times [2021-11-13 18:28:26,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:26,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966132991] [2021-11-13 18:28:26,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:26,426 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:26,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:26,427 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:26,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-13 18:28:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:26,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:26,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 18:28:26,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 18:28:26,908 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:26,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966132991] [2021-11-13 18:28:26,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966132991] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:26,909 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:26,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:28:26,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747544416] [2021-11-13 18:28:26,909 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:26,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:28:26,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:26,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:28:26,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:28:26,910 INFO L87 Difference]: Start difference. First operand 11525 states and 14859 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:27,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:27,333 INFO L93 Difference]: Finished difference Result 20234 states and 26193 transitions. [2021-11-13 18:28:27,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:28:27,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-13 18:28:27,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:27,343 INFO L225 Difference]: With dead ends: 20234 [2021-11-13 18:28:27,343 INFO L226 Difference]: Without dead ends: 9109 [2021-11-13 18:28:27,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:28:27,348 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 118 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.95ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.95ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:27,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 421 Invalid, 17 Unknown, 0 Unchecked, 0.95ms Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 14.95ms Time] [2021-11-13 18:28:27,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9109 states. [2021-11-13 18:28:27,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9109 to 9105. [2021-11-13 18:28:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9105 states, 9102 states have (on average 1.2618105910788837) internal successors, (11485), 9103 states have internal predecessors, (11485), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:27,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9105 states to 9105 states and 11487 transitions. [2021-11-13 18:28:27,715 INFO L78 Accepts]: Start accepts. Automaton has 9105 states and 11487 transitions. Word has length 146 [2021-11-13 18:28:27,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:27,715 INFO L470 AbstractCegarLoop]: Abstraction has 9105 states and 11487 transitions. [2021-11-13 18:28:27,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:27,716 INFO L276 IsEmpty]: Start isEmpty. Operand 9105 states and 11487 transitions. [2021-11-13 18:28:27,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 18:28:27,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:27,724 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:27,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:27,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:27,924 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:27,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:27,925 INFO L85 PathProgramCache]: Analyzing trace with hash 830883552, now seen corresponding path program 1 times [2021-11-13 18:28:27,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:27,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845512025] [2021-11-13 18:28:27,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:27,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:27,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:27,927 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:27,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-13 18:28:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:28,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:28,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:28:28,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:28:28,458 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:28,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845512025] [2021-11-13 18:28:28,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845512025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:28,458 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:28,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:28:28,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936508395] [2021-11-13 18:28:28,458 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:28,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:28:28,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:28,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:28:28,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:28:28,459 INFO L87 Difference]: Start difference. First operand 9105 states and 11487 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:28,730 INFO L93 Difference]: Finished difference Result 15211 states and 19191 transitions. [2021-11-13 18:28:28,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:28:28,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-13 18:28:28,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:28,737 INFO L225 Difference]: With dead ends: 15211 [2021-11-13 18:28:28,737 INFO L226 Difference]: Without dead ends: 6136 [2021-11-13 18:28:28,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:28:28,743 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 230 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.85ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.46ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:28,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 315 Invalid, 14 Unknown, 0 Unchecked, 0.85ms Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 19.46ms Time] [2021-11-13 18:28:28,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-11-13 18:28:28,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 6072. [2021-11-13 18:28:28,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6072 states, 6069 states have (on average 1.2306805074971165) internal successors, (7469), 6070 states have internal predecessors, (7469), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:28,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6072 states to 6072 states and 7471 transitions. [2021-11-13 18:28:28,994 INFO L78 Accepts]: Start accepts. Automaton has 6072 states and 7471 transitions. Word has length 146 [2021-11-13 18:28:28,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:28,994 INFO L470 AbstractCegarLoop]: Abstraction has 6072 states and 7471 transitions. [2021-11-13 18:28:28,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:28,994 INFO L276 IsEmpty]: Start isEmpty. Operand 6072 states and 7471 transitions. [2021-11-13 18:28:28,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-13 18:28:28,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:28,997 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:29,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:29,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:29,198 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:29,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:29,198 INFO L85 PathProgramCache]: Analyzing trace with hash 84783450, now seen corresponding path program 1 times [2021-11-13 18:28:29,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:29,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617390439] [2021-11-13 18:28:29,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:29,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:29,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:29,200 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:29,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-13 18:28:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:29,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:29,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 18:28:29,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 18:28:29,768 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:29,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617390439] [2021-11-13 18:28:29,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617390439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:29,769 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:29,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:28:29,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163973642] [2021-11-13 18:28:29,769 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:29,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:28:29,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:29,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:28:29,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:29,771 INFO L87 Difference]: Start difference. First operand 6072 states and 7471 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:30,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:30,019 INFO L93 Difference]: Finished difference Result 11708 states and 14447 transitions. [2021-11-13 18:28:30,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:28:30,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-11-13 18:28:30,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:30,026 INFO L225 Difference]: With dead ends: 11708 [2021-11-13 18:28:30,026 INFO L226 Difference]: Without dead ends: 5922 [2021-11-13 18:28:30,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:30,031 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 1 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.48ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:30,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 314 Invalid, 12 Unknown, 0 Unchecked, 0.48ms Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 20.29ms Time] [2021-11-13 18:28:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5922 states. [2021-11-13 18:28:30,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5922 to 5632. [2021-11-13 18:28:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5632 states, 5629 states have (on average 1.2162018120447682) internal successors, (6846), 5630 states have internal predecessors, (6846), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:30,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5632 states to 5632 states and 6848 transitions. [2021-11-13 18:28:30,432 INFO L78 Accepts]: Start accepts. Automaton has 5632 states and 6848 transitions. Word has length 185 [2021-11-13 18:28:30,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:30,432 INFO L470 AbstractCegarLoop]: Abstraction has 5632 states and 6848 transitions. [2021-11-13 18:28:30,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:30,433 INFO L276 IsEmpty]: Start isEmpty. Operand 5632 states and 6848 transitions. [2021-11-13 18:28:30,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-13 18:28:30,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:30,436 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:30,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:30,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:30,639 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:30,639 INFO L85 PathProgramCache]: Analyzing trace with hash -853920653, now seen corresponding path program 1 times [2021-11-13 18:28:30,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:30,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301871882] [2021-11-13 18:28:30,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:30,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:30,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:30,641 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:30,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-13 18:28:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:30,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:30,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 18:28:30,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 18:28:31,222 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:31,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301871882] [2021-11-13 18:28:31,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301871882] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:31,222 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:31,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:28:31,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30344028] [2021-11-13 18:28:31,223 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:31,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:28:31,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:31,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:28:31,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:31,224 INFO L87 Difference]: Start difference. First operand 5632 states and 6848 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:31,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:31,704 INFO L93 Difference]: Finished difference Result 13270 states and 16069 transitions. [2021-11-13 18:28:31,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:28:31,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-13 18:28:31,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:31,712 INFO L225 Difference]: With dead ends: 13270 [2021-11-13 18:28:31,713 INFO L226 Difference]: Without dead ends: 7889 [2021-11-13 18:28:31,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:31,718 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 112 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.91ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:31,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 401 Invalid, 10 Unknown, 0 Unchecked, 0.91ms Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 13.77ms Time] [2021-11-13 18:28:31,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7889 states. [2021-11-13 18:28:32,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7889 to 6493. [2021-11-13 18:28:32,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6493 states, 6490 states have (on average 1.2010785824345147) internal successors, (7795), 6491 states have internal predecessors, (7795), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:32,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6493 states to 6493 states and 7797 transitions. [2021-11-13 18:28:32,011 INFO L78 Accepts]: Start accepts. Automaton has 6493 states and 7797 transitions. Word has length 192 [2021-11-13 18:28:32,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:32,012 INFO L470 AbstractCegarLoop]: Abstraction has 6493 states and 7797 transitions. [2021-11-13 18:28:32,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:32,012 INFO L276 IsEmpty]: Start isEmpty. Operand 6493 states and 7797 transitions. [2021-11-13 18:28:32,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-13 18:28:32,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:32,015 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:32,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:32,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:32,215 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:32,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:32,216 INFO L85 PathProgramCache]: Analyzing trace with hash 598891033, now seen corresponding path program 1 times [2021-11-13 18:28:32,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:32,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839965829] [2021-11-13 18:28:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:32,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:32,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:32,217 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:32,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-13 18:28:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:32,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:32,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 18:28:32,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 18:28:32,859 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:32,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839965829] [2021-11-13 18:28:32,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839965829] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:32,859 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:32,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:28:32,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446101547] [2021-11-13 18:28:32,859 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:32,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:28:32,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:32,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:28:32,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:32,861 INFO L87 Difference]: Start difference. First operand 6493 states and 7797 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:33,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:33,135 INFO L93 Difference]: Finished difference Result 12646 states and 15205 transitions. [2021-11-13 18:28:33,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:28:33,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-13 18:28:33,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:33,143 INFO L225 Difference]: With dead ends: 12646 [2021-11-13 18:28:33,143 INFO L226 Difference]: Without dead ends: 6439 [2021-11-13 18:28:33,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:33,148 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 139 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.74ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.47ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:33,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 319 Invalid, 7 Unknown, 0 Unchecked, 0.74ms Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 9.47ms Time] [2021-11-13 18:28:33,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6439 states. [2021-11-13 18:28:33,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6439 to 5724. [2021-11-13 18:28:33,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5724 states, 5721 states have (on average 1.1795140709666143) internal successors, (6748), 5722 states have internal predecessors, (6748), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:33,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5724 states to 5724 states and 6750 transitions. [2021-11-13 18:28:33,409 INFO L78 Accepts]: Start accepts. Automaton has 5724 states and 6750 transitions. Word has length 192 [2021-11-13 18:28:33,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:33,409 INFO L470 AbstractCegarLoop]: Abstraction has 5724 states and 6750 transitions. [2021-11-13 18:28:33,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:33,410 INFO L276 IsEmpty]: Start isEmpty. Operand 5724 states and 6750 transitions. [2021-11-13 18:28:33,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-13 18:28:33,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:33,412 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:33,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:33,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:33,616 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:33,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:33,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1632035571, now seen corresponding path program 1 times [2021-11-13 18:28:33,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:33,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481329048] [2021-11-13 18:28:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:33,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:33,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:33,617 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:33,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-13 18:28:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:33,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:33,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:28:33,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:28:34,260 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:34,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481329048] [2021-11-13 18:28:34,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481329048] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:34,261 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:34,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:28:34,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300660090] [2021-11-13 18:28:34,261 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:34,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:28:34,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:34,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:28:34,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:34,262 INFO L87 Difference]: Start difference. First operand 5724 states and 6750 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:34,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:34,658 INFO L93 Difference]: Finished difference Result 11162 states and 13182 transitions. [2021-11-13 18:28:34,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:28:34,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-13 18:28:34,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:34,663 INFO L225 Difference]: With dead ends: 11162 [2021-11-13 18:28:34,664 INFO L226 Difference]: Without dead ends: 5724 [2021-11-13 18:28:34,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:34,667 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 0 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.73ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:34,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 321 Invalid, 12 Unknown, 0 Unchecked, 0.73ms Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 16.29ms Time] [2021-11-13 18:28:34,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5724 states. [2021-11-13 18:28:34,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5724 to 5724. [2021-11-13 18:28:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5724 states, 5721 states have (on average 1.1786400978849851) internal successors, (6743), 5722 states have internal predecessors, (6743), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5724 states to 5724 states and 6745 transitions. [2021-11-13 18:28:34,917 INFO L78 Accepts]: Start accepts. Automaton has 5724 states and 6745 transitions. Word has length 195 [2021-11-13 18:28:34,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:34,917 INFO L470 AbstractCegarLoop]: Abstraction has 5724 states and 6745 transitions. [2021-11-13 18:28:34,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:34,918 INFO L276 IsEmpty]: Start isEmpty. Operand 5724 states and 6745 transitions. [2021-11-13 18:28:34,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-13 18:28:34,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:34,920 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:34,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:35,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:35,120 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:35,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:35,121 INFO L85 PathProgramCache]: Analyzing trace with hash 93695541, now seen corresponding path program 1 times [2021-11-13 18:28:35,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:35,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880922410] [2021-11-13 18:28:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:35,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:35,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:35,122 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:35,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-13 18:28:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:35,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:28:35,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 18:28:35,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 18:28:35,806 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:35,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880922410] [2021-11-13 18:28:35,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880922410] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:28:35,806 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:28:35,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:28:35,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46509964] [2021-11-13 18:28:35,807 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:28:35,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:28:35,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:35,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:28:35,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:35,809 INFO L87 Difference]: Start difference. First operand 5724 states and 6745 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:35,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:35,990 INFO L93 Difference]: Finished difference Result 8459 states and 9975 transitions. [2021-11-13 18:28:35,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:28:35,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-13 18:28:35,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:35,994 INFO L225 Difference]: With dead ends: 8459 [2021-11-13 18:28:35,994 INFO L226 Difference]: Without dead ends: 3021 [2021-11-13 18:28:35,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:28:35,998 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 5 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.70ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.79ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:35,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 324 Invalid, 13 Unknown, 0 Unchecked, 0.70ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 17.79ms Time] [2021-11-13 18:28:36,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3021 states. [2021-11-13 18:28:36,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3021 to 3021. [2021-11-13 18:28:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 3018 states have (on average 1.1729622266401591) internal successors, (3540), 3019 states have internal predecessors, (3540), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:36,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 3542 transitions. [2021-11-13 18:28:36,130 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 3542 transitions. Word has length 195 [2021-11-13 18:28:36,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:36,131 INFO L470 AbstractCegarLoop]: Abstraction has 3021 states and 3542 transitions. [2021-11-13 18:28:36,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:36,131 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 3542 transitions. [2021-11-13 18:28:36,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-13 18:28:36,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:36,132 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:36,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:36,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:36,336 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:36,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:36,336 INFO L85 PathProgramCache]: Analyzing trace with hash -565835981, now seen corresponding path program 1 times [2021-11-13 18:28:36,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:36,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470271798] [2021-11-13 18:28:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:36,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:36,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:36,337 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:36,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-13 18:28:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:36,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:28:36,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:28:37,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 85 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:28:38,228 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:28:38,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470271798] [2021-11-13 18:28:38,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470271798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:28:38,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:28:38,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-11-13 18:28:38,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548502126] [2021-11-13 18:28:38,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:28:38,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 18:28:38,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:28:38,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 18:28:38,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:28:38,232 INFO L87 Difference]: Start difference. First operand 3021 states and 3542 transitions. Second operand has 19 states, 19 states have (on average 19.526315789473685) internal successors, (371), 19 states have internal predecessors, (371), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:45,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:28:45,430 INFO L93 Difference]: Finished difference Result 22081 states and 25423 transitions. [2021-11-13 18:28:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-13 18:28:45,430 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.526315789473685) internal successors, (371), 19 states have internal predecessors, (371), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-13 18:28:45,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:28:45,455 INFO L225 Difference]: With dead ends: 22081 [2021-11-13 18:28:45,455 INFO L226 Difference]: Without dead ends: 19025 [2021-11-13 18:28:45,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5613 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2099, Invalid=12663, Unknown=0, NotChecked=0, Total=14762 [2021-11-13 18:28:45,464 INFO L933 BasicCegarLoop]: 1191 mSDtfsCounter, 10478 mSDsluCounter, 10707 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1473.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10478 SdHoareTripleChecker+Valid, 11898 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 44.12ms SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1703.14ms IncrementalHoareTripleChecker+Time [2021-11-13 18:28:45,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10478 Valid, 11898 Invalid, 1772 Unknown, 0 Unchecked, 44.12ms Time], IncrementalHoareTripleChecker [551 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 1703.14ms Time] [2021-11-13 18:28:45,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19025 states. [2021-11-13 18:28:45,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19025 to 7017. [2021-11-13 18:28:45,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7017 states, 7014 states have (on average 1.1770744225834047) internal successors, (8256), 7015 states have internal predecessors, (8256), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7017 states to 7017 states and 8258 transitions. [2021-11-13 18:28:45,916 INFO L78 Accepts]: Start accepts. Automaton has 7017 states and 8258 transitions. Word has length 195 [2021-11-13 18:28:45,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:28:45,916 INFO L470 AbstractCegarLoop]: Abstraction has 7017 states and 8258 transitions. [2021-11-13 18:28:45,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.526315789473685) internal successors, (371), 19 states have internal predecessors, (371), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:45,917 INFO L276 IsEmpty]: Start isEmpty. Operand 7017 states and 8258 transitions. [2021-11-13 18:28:45,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-13 18:28:45,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:28:45,919 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:45,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:46,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:46,120 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:28:46,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:46,120 INFO L85 PathProgramCache]: Analyzing trace with hash -359844139, now seen corresponding path program 1 times [2021-11-13 18:28:46,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:28:46,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069344342] [2021-11-13 18:28:46,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:46,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:28:46,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:28:46,122 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:28:46,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-13 18:28:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:28:46,200 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:28:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:28:46,582 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-13 18:28:46,582 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:28:46,583 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:28:46,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:46,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:28:46,800 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:46,803 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:28:46,908 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 18:28:46,913 INFO L158 Benchmark]: Toolchain (without parser) took 52685.30ms. Allocated memory was 77.6MB in the beginning and 3.5GB in the end (delta: 3.4GB). Free memory was 41.9MB in the beginning and 2.6GB in the end (delta: -2.5GB). Peak memory consumption was 894.3MB. Max. memory is 16.1GB. [2021-11-13 18:28:46,913 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 77.6MB. Free memory is still 58.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:28:46,914 INFO L158 Benchmark]: CACSL2BoogieTranslator took 399.99ms. Allocated memory is still 77.6MB. Free memory was 41.7MB in the beginning and 59.3MB in the end (delta: -17.6MB). Peak memory consumption was 6.0MB. Max. memory is 16.1GB. [2021-11-13 18:28:46,914 INFO L158 Benchmark]: Boogie Procedure Inliner took 75.51ms. Allocated memory is still 77.6MB. Free memory was 59.3MB in the beginning and 57.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:28:46,918 INFO L158 Benchmark]: Boogie Preprocessor took 64.97ms. Allocated memory is still 77.6MB. Free memory was 57.1MB in the beginning and 54.7MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:28:46,918 INFO L158 Benchmark]: RCFGBuilder took 869.77ms. Allocated memory is still 77.6MB. Free memory was 54.7MB in the beginning and 33.8MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-13 18:28:46,919 INFO L158 Benchmark]: TraceAbstraction took 51267.58ms. Allocated memory was 77.6MB in the beginning and 3.5GB in the end (delta: 3.4GB). Free memory was 33.2MB in the beginning and 2.6GB in the end (delta: -2.6GB). Peak memory consumption was 886.2MB. Max. memory is 16.1GB. [2021-11-13 18:28:46,928 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 77.6MB. Free memory is still 58.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 399.99ms. Allocated memory is still 77.6MB. Free memory was 41.7MB in the beginning and 59.3MB in the end (delta: -17.6MB). Peak memory consumption was 6.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 75.51ms. Allocated memory is still 77.6MB. Free memory was 59.3MB in the beginning and 57.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.97ms. Allocated memory is still 77.6MB. Free memory was 57.1MB in the beginning and 54.7MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 869.77ms. Allocated memory is still 77.6MB. Free memory was 54.7MB in the beginning and 33.8MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 51267.58ms. Allocated memory was 77.6MB in the beginning and 3.5GB in the end (delta: 3.4GB). Free memory was 33.2MB in the beginning and 2.6GB in the end (delta: -2.6GB). Peak memory consumption was 886.2MB. Max. memory is 16.1GB. * 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 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:28:46,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648041ce-5d13-4b83-bd52-dc10bafb3038/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null