./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX --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 2719a9efd2165050483c20571c85746fdd7204d074459e12a38b31692a3fffb0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:57:13,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:57:13,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:57:13,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:57:13,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:57:13,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:57:13,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:57:13,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:57:13,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:57:13,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:57:13,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:57:13,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:57:13,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:57:13,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:57:13,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:57:13,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:57:13,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:57:13,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:57:13,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:57:13,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:57:13,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:57:13,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:57:13,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:57:13,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:57:13,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:57:13,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:57:13,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:57:13,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:57:13,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:57:13,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:57:13,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:57:13,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:57:13,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:57:13,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:57:13,905 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:57:13,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:57:13,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:57:13,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:57:13,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:57:13,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:57:13,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:57:13,910 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:57:13,961 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:57:13,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:57:13,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:57:13,962 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:57:13,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:57:13,970 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:57:13,970 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:57:13,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:57:13,971 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:57:13,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:57:13,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:57:13,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:57:13,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:57:13,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:57:13,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:57:13,974 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:57:13,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:57:13,974 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:57:13,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:57:13,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:57:13,975 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:57:13,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:57:13,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:57:13,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:57:13,976 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:57:13,976 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:57:13,976 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:57:13,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:57:13,977 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:57:13,978 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:57:13,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:57:13,979 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:57:13,979 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_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2719a9efd2165050483c20571c85746fdd7204d074459e12a38b31692a3fffb0 [2021-11-09 08:57:14,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:57:14,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:57:14,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:57:14,269 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:57:14,270 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:57:14,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2021-11-09 08:57:14,353 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/data/f01e42086/10675070c9384168ba1ff02793b452c3/FLAG557ae5daf [2021-11-09 08:57:14,786 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:57:14,786 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2021-11-09 08:57:14,792 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/data/f01e42086/10675070c9384168ba1ff02793b452c3/FLAG557ae5daf [2021-11-09 08:57:15,178 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/data/f01e42086/10675070c9384168ba1ff02793b452c3 [2021-11-09 08:57:15,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:57:15,183 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:57:15,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:57:15,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:57:15,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:57:15,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:57:15" (1/1) ... [2021-11-09 08:57:15,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71034c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:15, skipping insertion in model container [2021-11-09 08:57:15,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:57:15" (1/1) ... [2021-11-09 08:57:15,206 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:57:15,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:57:15,410 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_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i[820,833] [2021-11-09 08:57:15,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:57:15,432 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:57:15,443 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_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i[820,833] [2021-11-09 08:57:15,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:57:15,467 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:57:15,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:15 WrapperNode [2021-11-09 08:57:15,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:57:15,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:57:15,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:57:15,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:57:15,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:15" (1/1) ... [2021-11-09 08:57:15,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:15" (1/1) ... [2021-11-09 08:57:15,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:57:15,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:57:15,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:57:15,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:57:15,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:15" (1/1) ... [2021-11-09 08:57:15,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:15" (1/1) ... [2021-11-09 08:57:15,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:15" (1/1) ... [2021-11-09 08:57:15,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:15" (1/1) ... [2021-11-09 08:57:15,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:15" (1/1) ... [2021-11-09 08:57:15,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:15" (1/1) ... [2021-11-09 08:57:15,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:15" (1/1) ... [2021-11-09 08:57:15,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:57:15,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:57:15,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:57:15,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:57:15,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:15" (1/1) ... [2021-11-09 08:57:15,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:57:15,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:15,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:57:15,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:57:15,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:57:15,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:57:15,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:57:15,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:57:15,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:57:15,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:57:15,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:57:15,899 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:57:15,900 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-09 08:57:15,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:57:15 BoogieIcfgContainer [2021-11-09 08:57:15,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:57:15,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:57:15,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:57:15,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:57:15,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:57:15" (1/3) ... [2021-11-09 08:57:15,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab50775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:57:15, skipping insertion in model container [2021-11-09 08:57:15,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:57:15" (2/3) ... [2021-11-09 08:57:15,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab50775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:57:15, skipping insertion in model container [2021-11-09 08:57:15,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:57:15" (3/3) ... [2021-11-09 08:57:15,915 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-2.i [2021-11-09 08:57:15,926 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:57:15,926 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:57:15,975 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:57:15,982 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 [2021-11-09 08:57:15,982 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:57:15,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:15,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 08:57:15,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:16,000 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:16,000 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:16,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:16,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1960376238, now seen corresponding path program 1 times [2021-11-09 08:57:16,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:16,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205266628] [2021-11-09 08:57:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:16,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:16,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:16,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205266628] [2021-11-09 08:57:16,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205266628] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:57:16,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:57:16,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:57:16,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829166516] [2021-11-09 08:57:16,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:57:16,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:57:16,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:57:16,273 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:16,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:16,328 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2021-11-09 08:57:16,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:57:16,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-09 08:57:16,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:16,337 INFO L225 Difference]: With dead ends: 42 [2021-11-09 08:57:16,338 INFO L226 Difference]: Without dead ends: 20 [2021-11-09 08:57:16,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:57:16,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-09 08:57:16,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-09 08:57:16,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-09 08:57:16,387 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-11-09 08:57:16,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:16,388 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-09 08:57:16,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:16,390 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-09 08:57:16,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 08:57:16,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:16,391 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:16,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:57:16,392 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:16,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:16,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1305178672, now seen corresponding path program 1 times [2021-11-09 08:57:16,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:16,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515227293] [2021-11-09 08:57:16,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:16,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:57:16,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:16,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515227293] [2021-11-09 08:57:16,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515227293] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:16,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248010721] [2021-11-09 08:57:16,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:16,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:16,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:16,491 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:16,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:57:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:16,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:57:16,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:57:16,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248010721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:57:16,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:16,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-09 08:57:16,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261140019] [2021-11-09 08:57:16,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:57:16,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:16,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:57:16,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:57:16,609 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:16,621 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-11-09 08:57:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:57:16,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-09 08:57:16,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:16,623 INFO L225 Difference]: With dead ends: 32 [2021-11-09 08:57:16,624 INFO L226 Difference]: Without dead ends: 23 [2021-11-09 08:57:16,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:57:16,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-09 08:57:16,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-09 08:57:16,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-11-09 08:57:16,630 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2021-11-09 08:57:16,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:16,630 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-11-09 08:57:16,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-11-09 08:57:16,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 08:57:16,632 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:16,632 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:16,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:16,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:16,850 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:16,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:16,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1356848343, now seen corresponding path program 1 times [2021-11-09 08:57:16,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:16,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81164209] [2021-11-09 08:57:16,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:16,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:57:16,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:16,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81164209] [2021-11-09 08:57:16,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81164209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:16,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072563850] [2021-11-09 08:57:16,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:16,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:16,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:16,901 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:16,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:57:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:16,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:57:16,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:57:17,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072563850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:57:17,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:57:17,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-09 08:57:17,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981899477] [2021-11-09 08:57:17,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:57:17,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:17,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:57:17,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:57:17,016 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:17,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:17,033 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2021-11-09 08:57:17,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:57:17,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-09 08:57:17,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:17,035 INFO L225 Difference]: With dead ends: 44 [2021-11-09 08:57:17,035 INFO L226 Difference]: Without dead ends: 27 [2021-11-09 08:57:17,036 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:57:17,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-09 08:57:17,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-11-09 08:57:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:17,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2021-11-09 08:57:17,041 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2021-11-09 08:57:17,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:17,041 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2021-11-09 08:57:17,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:17,042 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2021-11-09 08:57:17,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 08:57:17,043 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:17,043 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:17,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:17,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:17,257 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:17,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:17,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1942419029, now seen corresponding path program 1 times [2021-11-09 08:57:17,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:17,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054435616] [2021-11-09 08:57:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:17,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:57:17,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:17,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054435616] [2021-11-09 08:57:17,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054435616] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:17,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089078306] [2021-11-09 08:57:17,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:17,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:17,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:17,357 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:17,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:57:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:17,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:57:17,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:57:17,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089078306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:17,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:17,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-09 08:57:17,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152919741] [2021-11-09 08:57:17,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:57:17,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:17,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:57:17,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:57:17,485 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:17,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:17,504 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-11-09 08:57:17,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:57:17,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-09 08:57:17,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:17,505 INFO L225 Difference]: With dead ends: 46 [2021-11-09 08:57:17,505 INFO L226 Difference]: Without dead ends: 27 [2021-11-09 08:57:17,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:57:17,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-09 08:57:17,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-11-09 08:57:17,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:17,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-11-09 08:57:17,510 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2021-11-09 08:57:17,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:17,511 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-11-09 08:57:17,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:17,511 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-11-09 08:57:17,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 08:57:17,512 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:17,512 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:17,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:17,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:17,737 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:17,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:17,738 INFO L85 PathProgramCache]: Analyzing trace with hash 784472297, now seen corresponding path program 2 times [2021-11-09 08:57:17,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:17,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597266192] [2021-11-09 08:57:17,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:17,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:57:17,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:17,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597266192] [2021-11-09 08:57:17,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597266192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:17,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325369877] [2021-11-09 08:57:17,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:57:17,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:17,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:17,801 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:17,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:57:17,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:57:17,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:17,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:57:17,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:57:17,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325369877] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:17,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:17,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-11-09 08:57:17,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561281918] [2021-11-09 08:57:17,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:57:17,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:17,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:57:17,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:57:17,965 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:18,026 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2021-11-09 08:57:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:57:18,026 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-09 08:57:18,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:18,027 INFO L225 Difference]: With dead ends: 57 [2021-11-09 08:57:18,028 INFO L226 Difference]: Without dead ends: 38 [2021-11-09 08:57:18,028 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:57:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-09 08:57:18,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2021-11-09 08:57:18,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-11-09 08:57:18,034 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 19 [2021-11-09 08:57:18,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:18,035 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-11-09 08:57:18,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,035 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-11-09 08:57:18,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 08:57:18,036 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:18,036 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:18,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:18,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:18,257 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:18,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:18,258 INFO L85 PathProgramCache]: Analyzing trace with hash -201702437, now seen corresponding path program 3 times [2021-11-09 08:57:18,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:18,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546892344] [2021-11-09 08:57:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:18,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:57:18,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:18,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546892344] [2021-11-09 08:57:18,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546892344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:18,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070665530] [2021-11-09 08:57:18,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:57:18,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:18,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:18,370 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:18,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:57:18,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:57:18,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:18,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:57:18,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:57:18,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070665530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:18,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:18,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-11-09 08:57:18,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66407361] [2021-11-09 08:57:18,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:57:18,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:18,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:57:18,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:57:18,555 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:18,632 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-11-09 08:57:18,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:57:18,634 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-09 08:57:18,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:18,634 INFO L225 Difference]: With dead ends: 70 [2021-11-09 08:57:18,634 INFO L226 Difference]: Without dead ends: 46 [2021-11-09 08:57:18,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:57:18,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-09 08:57:18,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-11-09 08:57:18,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-11-09 08:57:18,640 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 24 [2021-11-09 08:57:18,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:18,641 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-11-09 08:57:18,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:18,641 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-11-09 08:57:18,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 08:57:18,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:18,642 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:18,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-09 08:57:18,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 08:57:18,843 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:18,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1255714277, now seen corresponding path program 4 times [2021-11-09 08:57:18,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:18,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143431366] [2021-11-09 08:57:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:18,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-09 08:57:18,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:18,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143431366] [2021-11-09 08:57:18,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143431366] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:18,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815779184] [2021-11-09 08:57:18,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:57:18,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:18,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:18,928 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:18,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:57:19,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:57:19,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:19,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:57:19,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:19,119 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-09 08:57:19,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815779184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:19,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:19,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-09 08:57:19,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578945212] [2021-11-09 08:57:19,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:57:19,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:19,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:57:19,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:57:19,124 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:19,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:19,152 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2021-11-09 08:57:19,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:57:19,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 08:57:19,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:19,157 INFO L225 Difference]: With dead ends: 74 [2021-11-09 08:57:19,159 INFO L226 Difference]: Without dead ends: 44 [2021-11-09 08:57:19,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:57:19,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-09 08:57:19,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-11-09 08:57:19,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:19,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2021-11-09 08:57:19,171 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 29 [2021-11-09 08:57:19,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:19,171 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2021-11-09 08:57:19,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:19,172 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2021-11-09 08:57:19,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 08:57:19,173 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:19,173 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:19,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:19,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 08:57:19,393 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:19,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:19,394 INFO L85 PathProgramCache]: Analyzing trace with hash -654389213, now seen corresponding path program 5 times [2021-11-09 08:57:19,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:19,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76827783] [2021-11-09 08:57:19,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:19,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-09 08:57:19,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:19,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76827783] [2021-11-09 08:57:19,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76827783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:19,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721430101] [2021-11-09 08:57:19,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:57:19,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:19,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:19,533 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:19,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:57:19,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 08:57:19,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:19,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:57:19,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:57:19,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721430101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:19,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:19,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-11-09 08:57:19,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72705436] [2021-11-09 08:57:19,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:57:19,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:19,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:57:19,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:57:19,735 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:19,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:19,796 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2021-11-09 08:57:19,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:57:19,797 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-09 08:57:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:19,798 INFO L225 Difference]: With dead ends: 86 [2021-11-09 08:57:19,798 INFO L226 Difference]: Without dead ends: 56 [2021-11-09 08:57:19,799 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:57:19,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-09 08:57:19,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2021-11-09 08:57:19,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:19,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2021-11-09 08:57:19,815 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 31 [2021-11-09 08:57:19,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:19,815 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2021-11-09 08:57:19,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:19,815 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2021-11-09 08:57:19,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 08:57:19,816 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:19,817 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:19,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:20,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:20,040 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:20,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:20,041 INFO L85 PathProgramCache]: Analyzing trace with hash -568371359, now seen corresponding path program 6 times [2021-11-09 08:57:20,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:20,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947259674] [2021-11-09 08:57:20,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:20,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-09 08:57:20,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:20,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947259674] [2021-11-09 08:57:20,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947259674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:20,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365047757] [2021-11-09 08:57:20,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:57:20,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:20,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:20,129 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:20,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:57:20,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 08:57:20,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:20,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:57:20,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 08:57:20,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365047757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:20,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:20,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-09 08:57:20,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317488779] [2021-11-09 08:57:20,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 08:57:20,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:20,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 08:57:20,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:57:20,370 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:20,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:20,451 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2021-11-09 08:57:20,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:57:20,452 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 08:57:20,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:20,453 INFO L225 Difference]: With dead ends: 100 [2021-11-09 08:57:20,453 INFO L226 Difference]: Without dead ends: 64 [2021-11-09 08:57:20,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:57:20,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-09 08:57:20,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2021-11-09 08:57:20,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2021-11-09 08:57:20,462 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 36 [2021-11-09 08:57:20,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:20,463 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2021-11-09 08:57:20,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:20,463 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2021-11-09 08:57:20,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 08:57:20,469 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:20,469 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:20,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:20,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:20,677 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:20,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:20,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1072367713, now seen corresponding path program 7 times [2021-11-09 08:57:20,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:20,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987696436] [2021-11-09 08:57:20,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:20,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 08:57:20,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:20,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987696436] [2021-11-09 08:57:20,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987696436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:20,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408456157] [2021-11-09 08:57:20,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:57:20,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:20,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:20,812 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:20,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:57:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:20,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 08:57:20,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 08:57:21,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408456157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:21,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:21,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-09 08:57:21,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909986176] [2021-11-09 08:57:21,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:57:21,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:21,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:57:21,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:57:21,038 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:21,063 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2021-11-09 08:57:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:57:21,064 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-09 08:57:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:21,064 INFO L225 Difference]: With dead ends: 104 [2021-11-09 08:57:21,064 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 08:57:21,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:57:21,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 08:57:21,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-11-09 08:57:21,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.25) internal successors, (75), 60 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2021-11-09 08:57:21,070 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 41 [2021-11-09 08:57:21,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:21,071 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2021-11-09 08:57:21,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:21,071 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2021-11-09 08:57:21,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 08:57:21,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:21,073 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:21,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:21,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:21,301 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:21,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:21,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1876143325, now seen corresponding path program 8 times [2021-11-09 08:57:21,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:21,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280423248] [2021-11-09 08:57:21,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:21,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 08:57:21,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:21,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280423248] [2021-11-09 08:57:21,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280423248] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:21,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908884981] [2021-11-09 08:57:21,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:57:21,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:21,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:21,410 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:21,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:57:21,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:57:21,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:21,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:57:21,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 08:57:21,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908884981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:21,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:21,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-09 08:57:21,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847912011] [2021-11-09 08:57:21,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:57:21,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:21,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:57:21,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:57:21,670 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:21,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:21,711 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2021-11-09 08:57:21,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:57:21,711 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-09 08:57:21,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:21,712 INFO L225 Difference]: With dead ends: 106 [2021-11-09 08:57:21,712 INFO L226 Difference]: Without dead ends: 64 [2021-11-09 08:57:21,718 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:57:21,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-09 08:57:21,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-11-09 08:57:21,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 62 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:21,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-11-09 08:57:21,728 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 43 [2021-11-09 08:57:21,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:21,728 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-11-09 08:57:21,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:21,729 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-11-09 08:57:21,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 08:57:21,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:21,736 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:21,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:21,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:21,955 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:21,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:21,955 INFO L85 PathProgramCache]: Analyzing trace with hash 716835483, now seen corresponding path program 9 times [2021-11-09 08:57:21,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:21,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24688342] [2021-11-09 08:57:21,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:21,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 08:57:22,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:22,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24688342] [2021-11-09 08:57:22,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24688342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:22,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574276926] [2021-11-09 08:57:22,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:57:22,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:22,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:22,090 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:22,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:57:22,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 08:57:22,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:22,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:57:22,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-09 08:57:22,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574276926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:22,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:22,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-11-09 08:57:22,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25229654] [2021-11-09 08:57:22,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:57:22,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:22,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:57:22,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:57:22,383 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:22,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:22,450 INFO L93 Difference]: Finished difference Result 118 states and 152 transitions. [2021-11-09 08:57:22,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:57:22,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 08:57:22,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:22,452 INFO L225 Difference]: With dead ends: 118 [2021-11-09 08:57:22,452 INFO L226 Difference]: Without dead ends: 76 [2021-11-09 08:57:22,452 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:57:22,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-09 08:57:22,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2021-11-09 08:57:22,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:22,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2021-11-09 08:57:22,470 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 45 [2021-11-09 08:57:22,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:22,472 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2021-11-09 08:57:22,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:22,472 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2021-11-09 08:57:22,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 08:57:22,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:22,475 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:22,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:22,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 08:57:22,675 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:22,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:22,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1555127913, now seen corresponding path program 10 times [2021-11-09 08:57:22,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:22,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270417623] [2021-11-09 08:57:22,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:22,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-09 08:57:22,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:22,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270417623] [2021-11-09 08:57:22,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270417623] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:22,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947353373] [2021-11-09 08:57:22,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:57:22,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:22,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:22,793 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:22,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:57:22,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:57:22,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:22,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 08:57:22,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-09 08:57:23,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947353373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:23,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:23,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-09 08:57:23,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979473066] [2021-11-09 08:57:23,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 08:57:23,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:23,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 08:57:23,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:57:23,081 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:23,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:23,114 INFO L93 Difference]: Finished difference Result 122 states and 154 transitions. [2021-11-09 08:57:23,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:57:23,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 08:57:23,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:23,116 INFO L225 Difference]: With dead ends: 122 [2021-11-09 08:57:23,116 INFO L226 Difference]: Without dead ends: 74 [2021-11-09 08:57:23,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:57:23,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-09 08:57:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-11-09 08:57:23,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 72 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:23,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2021-11-09 08:57:23,124 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 50 [2021-11-09 08:57:23,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:23,126 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2021-11-09 08:57:23,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:23,127 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2021-11-09 08:57:23,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 08:57:23,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:23,128 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:23,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:23,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 08:57:23,354 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:23,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:23,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1720209685, now seen corresponding path program 11 times [2021-11-09 08:57:23,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:23,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414331770] [2021-11-09 08:57:23,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:23,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-09 08:57:23,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:23,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414331770] [2021-11-09 08:57:23,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414331770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:23,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220918893] [2021-11-09 08:57:23,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:57:23,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:23,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:23,492 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:23,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:57:23,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-09 08:57:23,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:23,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:57:23,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-09 08:57:23,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220918893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:23,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:23,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2021-11-09 08:57:23,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095004556] [2021-11-09 08:57:23,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:57:23,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:23,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:57:23,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:57:23,907 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:24,001 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2021-11-09 08:57:24,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 08:57:24,001 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-09 08:57:24,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:24,002 INFO L225 Difference]: With dead ends: 134 [2021-11-09 08:57:24,002 INFO L226 Difference]: Without dead ends: 86 [2021-11-09 08:57:24,004 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:57:24,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-09 08:57:24,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2021-11-09 08:57:24,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2375) internal successors, (99), 80 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:24,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 99 transitions. [2021-11-09 08:57:24,009 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 99 transitions. Word has length 52 [2021-11-09 08:57:24,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:24,009 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 99 transitions. [2021-11-09 08:57:24,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:24,009 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 99 transitions. [2021-11-09 08:57:24,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 08:57:24,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:24,011 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:24,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:24,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:24,237 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:24,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:24,238 INFO L85 PathProgramCache]: Analyzing trace with hash 2017640405, now seen corresponding path program 12 times [2021-11-09 08:57:24,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:24,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204052461] [2021-11-09 08:57:24,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:24,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-09 08:57:24,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:24,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204052461] [2021-11-09 08:57:24,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204052461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:24,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287343081] [2021-11-09 08:57:24,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:57:24,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:24,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:24,400 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:24,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 08:57:24,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-09 08:57:24,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:24,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:57:24,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-09 08:57:24,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287343081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:24,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:24,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-09 08:57:24,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136125571] [2021-11-09 08:57:24,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:57:24,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:24,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:57:24,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:57:24,906 INFO L87 Difference]: Start difference. First operand 81 states and 99 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:24,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:24,950 INFO L93 Difference]: Finished difference Result 138 states and 174 transitions. [2021-11-09 08:57:24,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 08:57:24,951 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-09 08:57:24,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:24,952 INFO L225 Difference]: With dead ends: 138 [2021-11-09 08:57:24,952 INFO L226 Difference]: Without dead ends: 84 [2021-11-09 08:57:24,953 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:57:24,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-09 08:57:24,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-11-09 08:57:24,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 82 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:24,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2021-11-09 08:57:24,957 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 57 [2021-11-09 08:57:24,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:24,957 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2021-11-09 08:57:24,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:24,958 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2021-11-09 08:57:24,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 08:57:24,958 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:24,958 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:24,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:25,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:25,173 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:25,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:25,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1894041325, now seen corresponding path program 13 times [2021-11-09 08:57:25,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:25,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632491955] [2021-11-09 08:57:25,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:25,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-09 08:57:25,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:25,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632491955] [2021-11-09 08:57:25,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632491955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:25,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589005181] [2021-11-09 08:57:25,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:57:25,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:25,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:25,345 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:25,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 08:57:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:25,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 08:57:25,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-09 08:57:25,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589005181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:25,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:25,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-09 08:57:25,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439847724] [2021-11-09 08:57:25,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 08:57:25,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:25,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 08:57:25,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:57:25,667 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:25,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:25,704 INFO L93 Difference]: Finished difference Result 140 states and 176 transitions. [2021-11-09 08:57:25,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 08:57:25,705 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-09 08:57:25,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:25,707 INFO L225 Difference]: With dead ends: 140 [2021-11-09 08:57:25,707 INFO L226 Difference]: Without dead ends: 86 [2021-11-09 08:57:25,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:57:25,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-09 08:57:25,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-11-09 08:57:25,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2261904761904763) internal successors, (103), 84 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:25,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2021-11-09 08:57:25,713 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 59 [2021-11-09 08:57:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:25,713 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2021-11-09 08:57:25,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:25,713 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2021-11-09 08:57:25,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 08:57:25,714 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:25,714 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:25,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:25,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 08:57:25,930 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:25,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:25,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1371167441, now seen corresponding path program 14 times [2021-11-09 08:57:25,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:25,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748673552] [2021-11-09 08:57:25,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:25,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-09 08:57:26,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:26,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748673552] [2021-11-09 08:57:26,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748673552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:26,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388839592] [2021-11-09 08:57:26,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:57:26,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:26,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:26,112 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:26,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 08:57:26,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:57:26,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:26,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:57:26,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-09 08:57:26,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388839592] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:26,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:26,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-09 08:57:26,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422378998] [2021-11-09 08:57:26,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:57:26,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:26,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:57:26,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:57:26,480 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:26,526 INFO L93 Difference]: Finished difference Result 142 states and 178 transitions. [2021-11-09 08:57:26,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 08:57:26,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-09 08:57:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:26,528 INFO L225 Difference]: With dead ends: 142 [2021-11-09 08:57:26,528 INFO L226 Difference]: Without dead ends: 88 [2021-11-09 08:57:26,529 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:57:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-09 08:57:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-11-09 08:57:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2209302325581395) internal successors, (105), 86 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:26,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2021-11-09 08:57:26,533 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 61 [2021-11-09 08:57:26,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:26,535 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2021-11-09 08:57:26,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:26,535 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2021-11-09 08:57:26,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 08:57:26,536 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:26,536 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:26,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:26,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 08:57:26,753 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:26,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:26,754 INFO L85 PathProgramCache]: Analyzing trace with hash -384301809, now seen corresponding path program 15 times [2021-11-09 08:57:26,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:26,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232551572] [2021-11-09 08:57:26,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:26,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:26,946 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-09 08:57:26,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:26,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232551572] [2021-11-09 08:57:26,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232551572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:26,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195351063] [2021-11-09 08:57:26,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:57:26,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:26,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:26,948 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:26,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 08:57:27,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-09 08:57:27,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:27,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 08:57:27,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:27,418 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-09 08:57:27,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195351063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:27,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:27,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2021-11-09 08:57:27,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775242928] [2021-11-09 08:57:27,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 08:57:27,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:27,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 08:57:27,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2021-11-09 08:57:27,421 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:27,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:27,503 INFO L93 Difference]: Finished difference Result 154 states and 196 transitions. [2021-11-09 08:57:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:57:27,503 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-09 08:57:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:27,504 INFO L225 Difference]: With dead ends: 154 [2021-11-09 08:57:27,504 INFO L226 Difference]: Without dead ends: 100 [2021-11-09 08:57:27,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2021-11-09 08:57:27,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-09 08:57:27,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2021-11-09 08:57:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.2234042553191489) internal successors, (115), 94 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2021-11-09 08:57:27,509 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 63 [2021-11-09 08:57:27,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:27,510 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2021-11-09 08:57:27,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:27,510 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2021-11-09 08:57:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-09 08:57:27,511 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:27,511 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:27,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:27,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 08:57:27,738 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:27,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:27,739 INFO L85 PathProgramCache]: Analyzing trace with hash 2008179445, now seen corresponding path program 16 times [2021-11-09 08:57:27,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:27,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271286081] [2021-11-09 08:57:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:27,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-09 08:57:27,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:27,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271286081] [2021-11-09 08:57:27,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271286081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:27,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159335714] [2021-11-09 08:57:27,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:57:27,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:27,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:27,961 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:27,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 08:57:28,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:57:28,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:28,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 08:57:28,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-09 08:57:28,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159335714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:28,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:28,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-09 08:57:28,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942456744] [2021-11-09 08:57:28,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:57:28,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:28,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:57:28,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:57:28,376 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:28,437 INFO L93 Difference]: Finished difference Result 158 states and 198 transitions. [2021-11-09 08:57:28,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 08:57:28,438 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-09 08:57:28,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:28,438 INFO L225 Difference]: With dead ends: 158 [2021-11-09 08:57:28,438 INFO L226 Difference]: Without dead ends: 98 [2021-11-09 08:57:28,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:57:28,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-09 08:57:28,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-11-09 08:57:28,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.21875) internal successors, (117), 96 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:28,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2021-11-09 08:57:28,442 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 68 [2021-11-09 08:57:28,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:28,442 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2021-11-09 08:57:28,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:28,442 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2021-11-09 08:57:28,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-09 08:57:28,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:28,443 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:28,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-09 08:57:28,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:28,644 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:28,644 INFO L85 PathProgramCache]: Analyzing trace with hash -32876809, now seen corresponding path program 17 times [2021-11-09 08:57:28,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:28,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129867465] [2021-11-09 08:57:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:28,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-09 08:57:28,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:28,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129867465] [2021-11-09 08:57:28,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129867465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:28,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364511688] [2021-11-09 08:57:28,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:57:28,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:28,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:28,869 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:28,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 08:57:29,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-11-09 08:57:29,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:29,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:57:29,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-09 08:57:29,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364511688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:29,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:29,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2021-11-09 08:57:29,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813943418] [2021-11-09 08:57:29,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 08:57:29,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:29,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 08:57:29,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:57:29,487 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:29,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:29,590 INFO L93 Difference]: Finished difference Result 170 states and 216 transitions. [2021-11-09 08:57:29,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:57:29,591 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-09 08:57:29,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:29,592 INFO L225 Difference]: With dead ends: 170 [2021-11-09 08:57:29,592 INFO L226 Difference]: Without dead ends: 110 [2021-11-09 08:57:29,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:57:29,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-09 08:57:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2021-11-09 08:57:29,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 104 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:29,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2021-11-09 08:57:29,599 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 70 [2021-11-09 08:57:29,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:29,599 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2021-11-09 08:57:29,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:29,600 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2021-11-09 08:57:29,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 08:57:29,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:29,601 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:29,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:29,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:29,814 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:29,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:29,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1211963593, now seen corresponding path program 18 times [2021-11-09 08:57:29,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:29,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294585568] [2021-11-09 08:57:29,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:29,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-09 08:57:30,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:30,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294585568] [2021-11-09 08:57:30,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294585568] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:30,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210129274] [2021-11-09 08:57:30,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:57:30,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:30,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:30,055 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:30,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 08:57:30,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-09 08:57:30,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:30,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 08:57:30,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-09 08:57:31,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210129274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:31,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:31,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 31 [2021-11-09 08:57:31,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415701755] [2021-11-09 08:57:31,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 08:57:31,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:31,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 08:57:31,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:57:31,112 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:31,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:31,248 INFO L93 Difference]: Finished difference Result 184 states and 234 transitions. [2021-11-09 08:57:31,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 08:57:31,249 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-09 08:57:31,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:31,250 INFO L225 Difference]: With dead ends: 184 [2021-11-09 08:57:31,250 INFO L226 Difference]: Without dead ends: 118 [2021-11-09 08:57:31,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:57:31,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-09 08:57:31,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2021-11-09 08:57:31,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.2232142857142858) internal successors, (137), 112 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:31,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 137 transitions. [2021-11-09 08:57:31,254 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 137 transitions. Word has length 75 [2021-11-09 08:57:31,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:31,254 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 137 transitions. [2021-11-09 08:57:31,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:31,254 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 137 transitions. [2021-11-09 08:57:31,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 08:57:31,255 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:31,255 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:31,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:31,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:31,456 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:31,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:31,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2135143941, now seen corresponding path program 19 times [2021-11-09 08:57:31,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:31,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869701070] [2021-11-09 08:57:31,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:31,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-09 08:57:31,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:31,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869701070] [2021-11-09 08:57:31,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869701070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:31,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288925887] [2021-11-09 08:57:31,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:57:31,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:31,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:31,724 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:31,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 08:57:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:32,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 08:57:32,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-09 08:57:32,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288925887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:32,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:32,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-09 08:57:32,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085528961] [2021-11-09 08:57:32,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 08:57:32,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:32,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 08:57:32,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:57:32,242 INFO L87 Difference]: Start difference. First operand 113 states and 137 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:32,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:32,313 INFO L93 Difference]: Finished difference Result 188 states and 236 transitions. [2021-11-09 08:57:32,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 08:57:32,315 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 08:57:32,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:32,316 INFO L225 Difference]: With dead ends: 188 [2021-11-09 08:57:32,316 INFO L226 Difference]: Without dead ends: 116 [2021-11-09 08:57:32,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:57:32,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-09 08:57:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-11-09 08:57:32,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.219298245614035) internal successors, (139), 114 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 139 transitions. [2021-11-09 08:57:32,323 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 139 transitions. Word has length 80 [2021-11-09 08:57:32,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:32,323 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 139 transitions. [2021-11-09 08:57:32,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:32,324 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 139 transitions. [2021-11-09 08:57:32,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 08:57:32,325 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:32,325 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:32,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:32,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 08:57:32,549 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:32,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:32,550 INFO L85 PathProgramCache]: Analyzing trace with hash -70497539, now seen corresponding path program 20 times [2021-11-09 08:57:32,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:32,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003014205] [2021-11-09 08:57:32,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:32,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-09 08:57:32,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:32,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003014205] [2021-11-09 08:57:32,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003014205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:32,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757107124] [2021-11-09 08:57:32,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:57:32,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:32,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:32,827 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:32,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 08:57:33,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:57:33,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:33,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 08:57:33,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-09 08:57:33,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757107124] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:33,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:33,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-09 08:57:33,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372999229] [2021-11-09 08:57:33,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 08:57:33,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:33,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 08:57:33,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:57:33,396 INFO L87 Difference]: Start difference. First operand 115 states and 139 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:33,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:33,457 INFO L93 Difference]: Finished difference Result 190 states and 238 transitions. [2021-11-09 08:57:33,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:57:33,458 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-09 08:57:33,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:33,459 INFO L225 Difference]: With dead ends: 190 [2021-11-09 08:57:33,459 INFO L226 Difference]: Without dead ends: 118 [2021-11-09 08:57:33,459 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:57:33,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-09 08:57:33,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-11-09 08:57:33,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.2155172413793103) internal successors, (141), 116 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2021-11-09 08:57:33,463 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 82 [2021-11-09 08:57:33,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:33,463 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2021-11-09 08:57:33,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2021-11-09 08:57:33,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-09 08:57:33,465 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:33,465 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:33,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:33,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:33,680 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:33,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:33,681 INFO L85 PathProgramCache]: Analyzing trace with hash -220195969, now seen corresponding path program 21 times [2021-11-09 08:57:33,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:33,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914076346] [2021-11-09 08:57:33,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:33,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-09 08:57:33,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:33,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914076346] [2021-11-09 08:57:33,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914076346] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:33,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962015859] [2021-11-09 08:57:33,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:57:33,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:33,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:33,994 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:34,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 08:57:34,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-09 08:57:34,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:34,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 08:57:34,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-09 08:57:34,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962015859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:34,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:34,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 35 [2021-11-09 08:57:34,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100088217] [2021-11-09 08:57:34,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 08:57:34,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:34,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 08:57:34,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:57:34,770 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:34,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:34,882 INFO L93 Difference]: Finished difference Result 202 states and 256 transitions. [2021-11-09 08:57:34,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 08:57:34,883 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-09 08:57:34,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:34,885 INFO L225 Difference]: With dead ends: 202 [2021-11-09 08:57:34,885 INFO L226 Difference]: Without dead ends: 130 [2021-11-09 08:57:34,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:57:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-09 08:57:34,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2021-11-09 08:57:34,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.217741935483871) internal successors, (151), 124 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2021-11-09 08:57:34,893 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 84 [2021-11-09 08:57:34,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:34,894 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2021-11-09 08:57:34,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:34,894 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2021-11-09 08:57:34,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-09 08:57:34,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:34,895 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:34,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:35,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:35,111 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:35,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:35,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1727048385, now seen corresponding path program 22 times [2021-11-09 08:57:35,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:35,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014861334] [2021-11-09 08:57:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:35,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-09 08:57:35,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:35,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014861334] [2021-11-09 08:57:35,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014861334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:35,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556418428] [2021-11-09 08:57:35,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:57:35,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:35,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:35,409 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:35,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 08:57:35,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:57:35,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:35,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 08:57:35,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-09 08:57:36,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556418428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:36,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:36,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-09 08:57:36,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156673491] [2021-11-09 08:57:36,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 08:57:36,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:36,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 08:57:36,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-09 08:57:36,040 INFO L87 Difference]: Start difference. First operand 125 states and 151 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:36,110 INFO L93 Difference]: Finished difference Result 206 states and 258 transitions. [2021-11-09 08:57:36,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 08:57:36,113 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-09 08:57:36,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:36,114 INFO L225 Difference]: With dead ends: 206 [2021-11-09 08:57:36,115 INFO L226 Difference]: Without dead ends: 128 [2021-11-09 08:57:36,115 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-09 08:57:36,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-09 08:57:36,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-11-09 08:57:36,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.2142857142857142) internal successors, (153), 126 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:36,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2021-11-09 08:57:36,130 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 89 [2021-11-09 08:57:36,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:36,130 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2021-11-09 08:57:36,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:36,131 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2021-11-09 08:57:36,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-09 08:57:36,132 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:36,132 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:36,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:36,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 08:57:36,345 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:36,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:36,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1880839169, now seen corresponding path program 23 times [2021-11-09 08:57:36,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:36,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040054689] [2021-11-09 08:57:36,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:36,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-09 08:57:36,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:36,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040054689] [2021-11-09 08:57:36,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040054689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:36,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094474839] [2021-11-09 08:57:36,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:57:36,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:36,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:36,677 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:36,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 08:57:37,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-11-09 08:57:37,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:37,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:57:37,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-11-09 08:57:38,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094474839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:38,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:38,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 38 [2021-11-09 08:57:38,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181112555] [2021-11-09 08:57:38,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 08:57:38,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:38,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 08:57:38,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:57:38,018 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand has 38 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 38 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:38,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:38,136 INFO L93 Difference]: Finished difference Result 218 states and 276 transitions. [2021-11-09 08:57:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 08:57:38,137 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 38 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-09 08:57:38,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:38,138 INFO L225 Difference]: With dead ends: 218 [2021-11-09 08:57:38,138 INFO L226 Difference]: Without dead ends: 140 [2021-11-09 08:57:38,138 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:57:38,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-09 08:57:38,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2021-11-09 08:57:38,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.2164179104477613) internal successors, (163), 134 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:38,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2021-11-09 08:57:38,143 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 91 [2021-11-09 08:57:38,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:38,144 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2021-11-09 08:57:38,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 38 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:38,144 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2021-11-09 08:57:38,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-09 08:57:38,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:38,145 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:38,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:38,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 08:57:38,350 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:38,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:38,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1961812219, now seen corresponding path program 24 times [2021-11-09 08:57:38,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:38,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723419435] [2021-11-09 08:57:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:38,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-11-09 08:57:38,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:38,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723419435] [2021-11-09 08:57:38,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723419435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:38,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470813951] [2021-11-09 08:57:38,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:57:38,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:38,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:38,717 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:38,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 08:57:40,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-09 08:57:40,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:40,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:57:40,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-09 08:57:40,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470813951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:40,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:40,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15] total 40 [2021-11-09 08:57:40,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811084403] [2021-11-09 08:57:40,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 08:57:40,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:40,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 08:57:40,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 08:57:40,543 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand has 40 states, 40 states have (on average 2.65) internal successors, (106), 40 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:40,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:40,682 INFO L93 Difference]: Finished difference Result 232 states and 294 transitions. [2021-11-09 08:57:40,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 08:57:40,684 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.65) internal successors, (106), 40 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-09 08:57:40,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:40,685 INFO L225 Difference]: With dead ends: 232 [2021-11-09 08:57:40,685 INFO L226 Difference]: Without dead ends: 148 [2021-11-09 08:57:40,686 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 08:57:40,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-09 08:57:40,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2021-11-09 08:57:40,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.2183098591549295) internal successors, (173), 142 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:40,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2021-11-09 08:57:40,691 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 96 [2021-11-09 08:57:40,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:40,691 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2021-11-09 08:57:40,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.65) internal successors, (106), 40 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2021-11-09 08:57:40,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-09 08:57:40,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:40,692 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:40,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:40,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 08:57:40,913 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:40,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:40,914 INFO L85 PathProgramCache]: Analyzing trace with hash -226001797, now seen corresponding path program 25 times [2021-11-09 08:57:40,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:40,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617769244] [2021-11-09 08:57:40,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:40,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-09 08:57:41,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:41,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617769244] [2021-11-09 08:57:41,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617769244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:41,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250043357] [2021-11-09 08:57:41,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:57:41,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:41,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:41,268 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:41,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 08:57:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:41,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 08:57:41,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-09 08:57:42,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250043357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:42,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:42,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-09 08:57:42,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250938621] [2021-11-09 08:57:42,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 08:57:42,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:42,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 08:57:42,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:57:42,036 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:42,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:42,101 INFO L93 Difference]: Finished difference Result 236 states and 296 transitions. [2021-11-09 08:57:42,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:57:42,104 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-09 08:57:42,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:42,105 INFO L225 Difference]: With dead ends: 236 [2021-11-09 08:57:42,105 INFO L226 Difference]: Without dead ends: 146 [2021-11-09 08:57:42,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:57:42,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-09 08:57:42,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-11-09 08:57:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.2152777777777777) internal successors, (175), 144 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:42,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 175 transitions. [2021-11-09 08:57:42,109 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 175 transitions. Word has length 101 [2021-11-09 08:57:42,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:42,110 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 175 transitions. [2021-11-09 08:57:42,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:42,110 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 175 transitions. [2021-11-09 08:57:42,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-09 08:57:42,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:42,111 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:42,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-09 08:57:42,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 08:57:42,325 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:42,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:42,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1807904583, now seen corresponding path program 26 times [2021-11-09 08:57:42,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:42,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972257118] [2021-11-09 08:57:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:42,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-09 08:57:42,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:42,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972257118] [2021-11-09 08:57:42,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972257118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:42,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691416433] [2021-11-09 08:57:42,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:57:42,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:42,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:42,673 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:42,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 08:57:43,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:57:43,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:43,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 08:57:43,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-09 08:57:43,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691416433] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:43,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:43,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-09 08:57:43,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171742810] [2021-11-09 08:57:43,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 08:57:43,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:43,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 08:57:43,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:57:43,430 INFO L87 Difference]: Start difference. First operand 145 states and 175 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:43,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:43,506 INFO L93 Difference]: Finished difference Result 238 states and 298 transitions. [2021-11-09 08:57:43,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:57:43,507 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-09 08:57:43,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:43,508 INFO L225 Difference]: With dead ends: 238 [2021-11-09 08:57:43,508 INFO L226 Difference]: Without dead ends: 148 [2021-11-09 08:57:43,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:57:43,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-09 08:57:43,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-11-09 08:57:43,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.2123287671232876) internal successors, (177), 146 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:43,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 177 transitions. [2021-11-09 08:57:43,516 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 177 transitions. Word has length 103 [2021-11-09 08:57:43,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:43,517 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 177 transitions. [2021-11-09 08:57:43,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:43,517 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 177 transitions. [2021-11-09 08:57:43,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-09 08:57:43,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:43,518 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:43,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:43,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 08:57:43,722 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:43,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:43,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1598059145, now seen corresponding path program 27 times [2021-11-09 08:57:43,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:43,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682737905] [2021-11-09 08:57:43,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:43,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-09 08:57:44,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:44,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682737905] [2021-11-09 08:57:44,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682737905] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:44,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950341644] [2021-11-09 08:57:44,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:57:44,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:44,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:44,141 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:44,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 08:57:44,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-09 08:57:44,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:44,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 08:57:44,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-11-09 08:57:45,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950341644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:45,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:45,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 16] total 44 [2021-11-09 08:57:45,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965835663] [2021-11-09 08:57:45,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 08:57:45,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:45,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 08:57:45,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 08:57:45,391 INFO L87 Difference]: Start difference. First operand 147 states and 177 transitions. Second operand has 44 states, 44 states have (on average 2.6136363636363638) internal successors, (115), 44 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:45,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:45,567 INFO L93 Difference]: Finished difference Result 250 states and 316 transitions. [2021-11-09 08:57:45,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 08:57:45,568 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.6136363636363638) internal successors, (115), 44 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-09 08:57:45,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:45,570 INFO L225 Difference]: With dead ends: 250 [2021-11-09 08:57:45,570 INFO L226 Difference]: Without dead ends: 160 [2021-11-09 08:57:45,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 08:57:45,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-09 08:57:45,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2021-11-09 08:57:45,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.2142857142857142) internal successors, (187), 154 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:45,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 187 transitions. [2021-11-09 08:57:45,582 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 187 transitions. Word has length 105 [2021-11-09 08:57:45,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:45,583 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 187 transitions. [2021-11-09 08:57:45,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.6136363636363638) internal successors, (115), 44 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:45,583 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 187 transitions. [2021-11-09 08:57:45,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-09 08:57:45,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:45,585 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:45,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:45,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:45,797 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:45,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:45,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1910005517, now seen corresponding path program 28 times [2021-11-09 08:57:45,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:45,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949780480] [2021-11-09 08:57:45,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:45,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-11-09 08:57:46,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:46,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949780480] [2021-11-09 08:57:46,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949780480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:46,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809889418] [2021-11-09 08:57:46,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:57:46,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:46,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:46,240 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:46,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 08:57:46,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:57:46,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:46,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 08:57:46,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-11-09 08:57:47,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809889418] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:47,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:47,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-09 08:57:47,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347917286] [2021-11-09 08:57:47,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 08:57:47,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:47,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 08:57:47,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-09 08:57:47,071 INFO L87 Difference]: Start difference. First operand 155 states and 187 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:47,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:47,161 INFO L93 Difference]: Finished difference Result 254 states and 318 transitions. [2021-11-09 08:57:47,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 08:57:47,162 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-09 08:57:47,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:47,163 INFO L225 Difference]: With dead ends: 254 [2021-11-09 08:57:47,163 INFO L226 Difference]: Without dead ends: 158 [2021-11-09 08:57:47,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-09 08:57:47,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-09 08:57:47,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-11-09 08:57:47,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.2115384615384615) internal successors, (189), 156 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:47,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 189 transitions. [2021-11-09 08:57:47,170 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 189 transitions. Word has length 110 [2021-11-09 08:57:47,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:47,170 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 189 transitions. [2021-11-09 08:57:47,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:47,170 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 189 transitions. [2021-11-09 08:57:47,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-09 08:57:47,171 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:47,172 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:47,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:47,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-09 08:57:47,385 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:47,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:47,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1132605583, now seen corresponding path program 29 times [2021-11-09 08:57:47,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:47,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138098269] [2021-11-09 08:57:47,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:47,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-11-09 08:57:47,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:47,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138098269] [2021-11-09 08:57:47,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138098269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:47,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442988751] [2021-11-09 08:57:47,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:57:47,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:47,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:47,859 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:47,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 08:57:49,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-11-09 08:57:49,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:49,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:57:49,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:57:50,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-11-09 08:57:50,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442988751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:50,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:57:50,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 17] total 47 [2021-11-09 08:57:50,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280055502] [2021-11-09 08:57:50,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-09 08:57:50,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:57:50,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-09 08:57:50,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 08:57:50,223 INFO L87 Difference]: Start difference. First operand 157 states and 189 transitions. Second operand has 47 states, 47 states have (on average 2.595744680851064) internal successors, (122), 47 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:50,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:57:50,354 INFO L93 Difference]: Finished difference Result 266 states and 336 transitions. [2021-11-09 08:57:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 08:57:50,355 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.595744680851064) internal successors, (122), 47 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-09 08:57:50,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:57:50,356 INFO L225 Difference]: With dead ends: 266 [2021-11-09 08:57:50,356 INFO L226 Difference]: Without dead ends: 170 [2021-11-09 08:57:50,357 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 08:57:50,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-09 08:57:50,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2021-11-09 08:57:50,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.2134146341463414) internal successors, (199), 164 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:50,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 199 transitions. [2021-11-09 08:57:50,363 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 199 transitions. Word has length 112 [2021-11-09 08:57:50,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:57:50,364 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 199 transitions. [2021-11-09 08:57:50,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.595744680851064) internal successors, (122), 47 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:57:50,364 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 199 transitions. [2021-11-09 08:57:50,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-09 08:57:50,365 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:57:50,365 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:57:50,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 08:57:50,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:50,583 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:57:50,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:57:50,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1997294257, now seen corresponding path program 30 times [2021-11-09 08:57:50,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:57:50,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278347297] [2021-11-09 08:57:50,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:57:50,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:57:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:57:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-11-09 08:57:51,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:57:51,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278347297] [2021-11-09 08:57:51,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278347297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:57:51,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846214814] [2021-11-09 08:57:51,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:57:51,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:57:51,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:57:51,062 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:57:51,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 08:57:59,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-11-09 08:57:59,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:57:59,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 08:57:59,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 1 proven. 330 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-11-09 08:58:00,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846214814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:00,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:00,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 18] total 49 [2021-11-09 08:58:00,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814367477] [2021-11-09 08:58:00,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 08:58:00,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:00,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 08:58:00,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=1672, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 08:58:00,210 INFO L87 Difference]: Start difference. First operand 165 states and 199 transitions. Second operand has 49 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 49 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:00,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:00,450 INFO L93 Difference]: Finished difference Result 280 states and 354 transitions. [2021-11-09 08:58:00,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-09 08:58:00,451 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 49 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-09 08:58:00,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:00,453 INFO L225 Difference]: With dead ends: 280 [2021-11-09 08:58:00,453 INFO L226 Difference]: Without dead ends: 178 [2021-11-09 08:58:00,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=680, Invalid=1672, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 08:58:00,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-09 08:58:00,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 173. [2021-11-09 08:58:00,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.2151162790697674) internal successors, (209), 172 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:00,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 209 transitions. [2021-11-09 08:58:00,461 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 209 transitions. Word has length 117 [2021-11-09 08:58:00,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:00,462 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 209 transitions. [2021-11-09 08:58:00,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 49 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:00,462 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 209 transitions. [2021-11-09 08:58:00,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-09 08:58:00,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:00,464 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:00,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:00,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:00,677 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:00,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:00,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1124602733, now seen corresponding path program 31 times [2021-11-09 08:58:00,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:00,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581146515] [2021-11-09 08:58:00,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:00,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-11-09 08:58:01,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:01,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581146515] [2021-11-09 08:58:01,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581146515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:01,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266431343] [2021-11-09 08:58:01,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:58:01,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:01,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:01,143 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:01,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 08:58:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:01,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 08:58:01,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-11-09 08:58:02,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266431343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:02,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:02,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-11-09 08:58:02,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806577857] [2021-11-09 08:58:02,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 08:58:02,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:02,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 08:58:02,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:58:02,142 INFO L87 Difference]: Start difference. First operand 173 states and 209 transitions. Second operand has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:02,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:02,220 INFO L93 Difference]: Finished difference Result 284 states and 356 transitions. [2021-11-09 08:58:02,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 08:58:02,225 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-09 08:58:02,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:02,227 INFO L225 Difference]: With dead ends: 284 [2021-11-09 08:58:02,227 INFO L226 Difference]: Without dead ends: 176 [2021-11-09 08:58:02,228 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:58:02,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-09 08:58:02,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-11-09 08:58:02,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.2126436781609196) internal successors, (211), 174 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-11-09 08:58:02,235 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 122 [2021-11-09 08:58:02,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:02,235 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-11-09 08:58:02,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-11-09 08:58:02,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-09 08:58:02,237 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:02,237 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:02,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-09 08:58:02,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 08:58:02,465 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:02,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:02,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1878625045, now seen corresponding path program 32 times [2021-11-09 08:58:02,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:02,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710791848] [2021-11-09 08:58:02,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:02,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-11-09 08:58:03,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:03,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710791848] [2021-11-09 08:58:03,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710791848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:03,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678094873] [2021-11-09 08:58:03,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:58:03,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:03,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:03,069 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:03,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 08:58:03,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:58:03,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:03,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 08:58:03,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-11-09 08:58:04,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678094873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:04,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:04,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-09 08:58:04,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552018080] [2021-11-09 08:58:04,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 08:58:04,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:04,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 08:58:04,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:58:04,185 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:04,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:04,272 INFO L93 Difference]: Finished difference Result 286 states and 358 transitions. [2021-11-09 08:58:04,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 08:58:04,292 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-09 08:58:04,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:04,294 INFO L225 Difference]: With dead ends: 286 [2021-11-09 08:58:04,294 INFO L226 Difference]: Without dead ends: 178 [2021-11-09 08:58:04,296 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:58:04,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-09 08:58:04,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-11-09 08:58:04,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.2102272727272727) internal successors, (213), 176 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:04,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 213 transitions. [2021-11-09 08:58:04,304 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 213 transitions. Word has length 124 [2021-11-09 08:58:04,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:04,306 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 213 transitions. [2021-11-09 08:58:04,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:04,306 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 213 transitions. [2021-11-09 08:58:04,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-09 08:58:04,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:04,308 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:04,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:04,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 08:58:04,521 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:04,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:04,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1762496791, now seen corresponding path program 33 times [2021-11-09 08:58:04,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:04,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703791939] [2021-11-09 08:58:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:04,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1466 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-11-09 08:58:05,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:05,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703791939] [2021-11-09 08:58:05,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703791939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:05,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476344562] [2021-11-09 08:58:05,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:58:05,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:05,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:05,224 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:05,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 08:58:06,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-09 08:58:06,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:06,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 08:58:06,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1466 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-11-09 08:58:06,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476344562] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:06,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:06,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 19] total 53 [2021-11-09 08:58:06,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780470248] [2021-11-09 08:58:06,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-09 08:58:06,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:06,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-09 08:58:06,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=800, Invalid=1956, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 08:58:06,913 INFO L87 Difference]: Start difference. First operand 177 states and 213 transitions. Second operand has 53 states, 53 states have (on average 2.5660377358490565) internal successors, (136), 53 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:07,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:07,102 INFO L93 Difference]: Finished difference Result 298 states and 376 transitions. [2021-11-09 08:58:07,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-09 08:58:07,102 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.5660377358490565) internal successors, (136), 53 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-09 08:58:07,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:07,104 INFO L225 Difference]: With dead ends: 298 [2021-11-09 08:58:07,104 INFO L226 Difference]: Without dead ends: 190 [2021-11-09 08:58:07,106 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=800, Invalid=1956, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 08:58:07,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-09 08:58:07,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 185. [2021-11-09 08:58:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.2119565217391304) internal successors, (223), 184 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 223 transitions. [2021-11-09 08:58:07,113 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 223 transitions. Word has length 126 [2021-11-09 08:58:07,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:07,114 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 223 transitions. [2021-11-09 08:58:07,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.5660377358490565) internal successors, (136), 53 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:07,115 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 223 transitions. [2021-11-09 08:58:07,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-09 08:58:07,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:07,116 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:07,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:07,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 08:58:07,341 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:07,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:07,342 INFO L85 PathProgramCache]: Analyzing trace with hash 247814313, now seen corresponding path program 34 times [2021-11-09 08:58:07,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:07,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348247811] [2021-11-09 08:58:07,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:07,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-11-09 08:58:08,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:08,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348247811] [2021-11-09 08:58:08,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348247811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:08,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058388009] [2021-11-09 08:58:08,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:58:08,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:08,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:08,017 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:08,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 08:58:08,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:58:08,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:08,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 08:58:08,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:09,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-11-09 08:58:09,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058388009] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:09,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:09,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-11-09 08:58:09,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737980593] [2021-11-09 08:58:09,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 08:58:09,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:09,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 08:58:09,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:58:09,215 INFO L87 Difference]: Start difference. First operand 185 states and 223 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:09,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:09,310 INFO L93 Difference]: Finished difference Result 302 states and 378 transitions. [2021-11-09 08:58:09,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 08:58:09,313 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-09 08:58:09,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:09,314 INFO L225 Difference]: With dead ends: 302 [2021-11-09 08:58:09,314 INFO L226 Difference]: Without dead ends: 188 [2021-11-09 08:58:09,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:58:09,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-09 08:58:09,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2021-11-09 08:58:09,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.2096774193548387) internal successors, (225), 186 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:09,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 225 transitions. [2021-11-09 08:58:09,320 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 225 transitions. Word has length 131 [2021-11-09 08:58:09,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:09,321 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 225 transitions. [2021-11-09 08:58:09,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:09,321 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 225 transitions. [2021-11-09 08:58:09,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-09 08:58:09,322 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:09,322 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:09,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:09,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:09,523 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:09,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1912542105, now seen corresponding path program 35 times [2021-11-09 08:58:09,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:09,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93146784] [2021-11-09 08:58:09,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:09,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-11-09 08:58:10,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:10,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93146784] [2021-11-09 08:58:10,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93146784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:10,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627721106] [2021-11-09 08:58:10,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:58:10,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:10,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:10,285 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:10,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 08:58:22,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-11-09 08:58:22,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:22,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 08:58:22,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 1 proven. 425 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2021-11-09 08:58:22,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627721106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:22,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:22,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 20] total 56 [2021-11-09 08:58:22,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281784364] [2021-11-09 08:58:22,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-09 08:58:22,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:22,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-09 08:58:22,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=892, Invalid=2188, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 08:58:22,892 INFO L87 Difference]: Start difference. First operand 187 states and 225 transitions. Second operand has 56 states, 56 states have (on average 2.5535714285714284) internal successors, (143), 56 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:23,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:23,071 INFO L93 Difference]: Finished difference Result 314 states and 396 transitions. [2021-11-09 08:58:23,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-09 08:58:23,071 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.5535714285714284) internal successors, (143), 56 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-09 08:58:23,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:23,073 INFO L225 Difference]: With dead ends: 314 [2021-11-09 08:58:23,073 INFO L226 Difference]: Without dead ends: 200 [2021-11-09 08:58:23,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=892, Invalid=2188, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 08:58:23,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-09 08:58:23,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 195. [2021-11-09 08:58:23,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.211340206185567) internal successors, (235), 194 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:23,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 235 transitions. [2021-11-09 08:58:23,081 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 235 transitions. Word has length 133 [2021-11-09 08:58:23,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:23,082 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 235 transitions. [2021-11-09 08:58:23,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.5535714285714284) internal successors, (143), 56 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:23,082 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 235 transitions. [2021-11-09 08:58:23,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-09 08:58:23,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:23,083 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:23,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:23,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:23,297 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:23,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:23,298 INFO L85 PathProgramCache]: Analyzing trace with hash 550249245, now seen corresponding path program 36 times [2021-11-09 08:58:23,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:23,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330514970] [2021-11-09 08:58:23,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:23,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2021-11-09 08:58:24,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:24,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330514970] [2021-11-09 08:58:24,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330514970] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:24,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990051808] [2021-11-09 08:58:24,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:58:24,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:24,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:24,058 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:24,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 08:58:34,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-11-09 08:58:34,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:34,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 08:58:34,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 1 proven. 477 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2021-11-09 08:58:35,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990051808] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:35,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:35,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 21] total 58 [2021-11-09 08:58:35,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500849850] [2021-11-09 08:58:35,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-09 08:58:35,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:35,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-09 08:58:35,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=2356, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 08:58:35,791 INFO L87 Difference]: Start difference. First operand 195 states and 235 transitions. Second operand has 58 states, 58 states have (on average 2.5517241379310347) internal successors, (148), 58 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:35,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:35,969 INFO L93 Difference]: Finished difference Result 328 states and 414 transitions. [2021-11-09 08:58:35,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-09 08:58:35,969 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.5517241379310347) internal successors, (148), 58 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-09 08:58:35,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:35,971 INFO L225 Difference]: With dead ends: 328 [2021-11-09 08:58:35,971 INFO L226 Difference]: Without dead ends: 208 [2021-11-09 08:58:35,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=950, Invalid=2356, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 08:58:35,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-09 08:58:35,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 203. [2021-11-09 08:58:35,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.2128712871287128) internal successors, (245), 202 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:35,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 245 transitions. [2021-11-09 08:58:35,978 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 245 transitions. Word has length 138 [2021-11-09 08:58:35,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:35,979 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 245 transitions. [2021-11-09 08:58:35,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.5517241379310347) internal successors, (148), 58 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:35,979 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 245 transitions. [2021-11-09 08:58:35,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-09 08:58:35,980 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:35,980 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:36,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-09 08:58:36,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 08:58:36,193 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:36,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:36,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1969531933, now seen corresponding path program 37 times [2021-11-09 08:58:36,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:36,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772462503] [2021-11-09 08:58:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:36,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1902 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2021-11-09 08:58:36,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:36,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772462503] [2021-11-09 08:58:36,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772462503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:36,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143405285] [2021-11-09 08:58:36,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:58:36,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:36,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:36,815 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:36,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 08:58:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:37,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 08:58:37,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1902 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2021-11-09 08:58:37,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143405285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:37,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:37,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-11-09 08:58:37,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742869866] [2021-11-09 08:58:37,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 08:58:37,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:37,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 08:58:37,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 08:58:37,999 INFO L87 Difference]: Start difference. First operand 203 states and 245 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:38,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:38,079 INFO L93 Difference]: Finished difference Result 332 states and 416 transitions. [2021-11-09 08:58:38,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 08:58:38,080 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-09 08:58:38,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:38,081 INFO L225 Difference]: With dead ends: 332 [2021-11-09 08:58:38,081 INFO L226 Difference]: Without dead ends: 206 [2021-11-09 08:58:38,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 08:58:38,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-09 08:58:38,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2021-11-09 08:58:38,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.2107843137254901) internal successors, (247), 204 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:38,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 247 transitions. [2021-11-09 08:58:38,089 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 247 transitions. Word has length 143 [2021-11-09 08:58:38,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:38,089 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 247 transitions. [2021-11-09 08:58:38,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:38,090 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 247 transitions. [2021-11-09 08:58:38,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-09 08:58:38,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:38,091 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:38,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-09 08:58:38,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 08:58:38,307 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:38,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:38,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1263614625, now seen corresponding path program 38 times [2021-11-09 08:58:38,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:38,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270897386] [2021-11-09 08:58:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:38,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:38,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2021-11-09 08:58:38,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:38,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270897386] [2021-11-09 08:58:38,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270897386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:38,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007455859] [2021-11-09 08:58:38,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:58:38,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:38,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:38,958 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:38,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 08:58:39,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:58:39,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:39,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 08:58:39,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2021-11-09 08:58:40,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007455859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:40,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:40,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-09 08:58:40,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399189526] [2021-11-09 08:58:40,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 08:58:40,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:40,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 08:58:40,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 08:58:40,148 INFO L87 Difference]: Start difference. First operand 205 states and 247 transitions. Second operand has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:40,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:40,229 INFO L93 Difference]: Finished difference Result 334 states and 418 transitions. [2021-11-09 08:58:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 08:58:40,241 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-09 08:58:40,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:40,243 INFO L225 Difference]: With dead ends: 334 [2021-11-09 08:58:40,243 INFO L226 Difference]: Without dead ends: 208 [2021-11-09 08:58:40,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 08:58:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-09 08:58:40,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-11-09 08:58:40,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.2087378640776698) internal successors, (249), 206 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:40,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 249 transitions. [2021-11-09 08:58:40,250 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 249 transitions. Word has length 145 [2021-11-09 08:58:40,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:40,251 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 249 transitions. [2021-11-09 08:58:40,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:40,251 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 249 transitions. [2021-11-09 08:58:40,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-09 08:58:40,252 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:40,253 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:40,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:40,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-09 08:58:40,473 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:40,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:40,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1238865441, now seen corresponding path program 39 times [2021-11-09 08:58:40,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:40,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066455364] [2021-11-09 08:58:40,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:40,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2021-11-09 08:58:41,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:41,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066455364] [2021-11-09 08:58:41,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066455364] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:41,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657125571] [2021-11-09 08:58:41,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:58:41,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:41,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:41,388 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:41,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 08:58:42,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-11-09 08:58:42,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:42,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 08:58:42,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 78 proven. 532 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2021-11-09 08:58:43,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657125571] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:43,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:43,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 24] total 64 [2021-11-09 08:58:43,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971432841] [2021-11-09 08:58:43,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-09 08:58:43,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:43,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-09 08:58:43,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=2856, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 08:58:43,635 INFO L87 Difference]: Start difference. First operand 207 states and 249 transitions. Second operand has 64 states, 64 states have (on average 2.484375) internal successors, (159), 64 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:44,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:44,539 INFO L93 Difference]: Finished difference Result 347 states and 438 transitions. [2021-11-09 08:58:44,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-09 08:58:44,540 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.484375) internal successors, (159), 64 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-09 08:58:44,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:44,542 INFO L225 Difference]: With dead ends: 347 [2021-11-09 08:58:44,542 INFO L226 Difference]: Without dead ends: 221 [2021-11-09 08:58:44,543 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1636, Invalid=5336, Unknown=0, NotChecked=0, Total=6972 [2021-11-09 08:58:44,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-09 08:58:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 217. [2021-11-09 08:58:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.2083333333333333) internal successors, (261), 216 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:44,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 261 transitions. [2021-11-09 08:58:44,551 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 261 transitions. Word has length 147 [2021-11-09 08:58:44,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:44,551 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 261 transitions. [2021-11-09 08:58:44,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.484375) internal successors, (159), 64 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:44,552 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 261 transitions. [2021-11-09 08:58:44,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-09 08:58:44,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:44,553 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:44,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:44,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:44,777 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:44,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:44,778 INFO L85 PathProgramCache]: Analyzing trace with hash -399083993, now seen corresponding path program 40 times [2021-11-09 08:58:44,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:44,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148014889] [2021-11-09 08:58:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:44,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2272 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2021-11-09 08:58:45,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:45,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148014889] [2021-11-09 08:58:45,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148014889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:45,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260489725] [2021-11-09 08:58:45,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:58:45,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:45,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:45,584 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:45,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 08:58:46,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:58:46,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:46,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 08:58:46,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2272 backedges. 1 proven. 590 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2021-11-09 08:58:47,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260489725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:47,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:47,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 23] total 65 [2021-11-09 08:58:47,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367252995] [2021-11-09 08:58:47,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-09 08:58:47,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:47,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-09 08:58:47,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1198, Invalid=2962, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 08:58:47,450 INFO L87 Difference]: Start difference. First operand 217 states and 261 transitions. Second operand has 65 states, 65 states have (on average 2.523076923076923) internal successors, (164), 65 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:47,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:47,671 INFO L93 Difference]: Finished difference Result 362 states and 456 transitions. [2021-11-09 08:58:47,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-09 08:58:47,672 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.523076923076923) internal successors, (164), 65 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-09 08:58:47,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:47,673 INFO L225 Difference]: With dead ends: 362 [2021-11-09 08:58:47,673 INFO L226 Difference]: Without dead ends: 230 [2021-11-09 08:58:47,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1198, Invalid=2962, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 08:58:47,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-09 08:58:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 225. [2021-11-09 08:58:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.2098214285714286) internal successors, (271), 224 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:47,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 271 transitions. [2021-11-09 08:58:47,683 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 271 transitions. Word has length 154 [2021-11-09 08:58:47,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:47,684 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 271 transitions. [2021-11-09 08:58:47,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.523076923076923) internal successors, (164), 65 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:47,684 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 271 transitions. [2021-11-09 08:58:47,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-09 08:58:47,686 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:47,686 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:47,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:47,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-09 08:58:47,909 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:47,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:47,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1525124967, now seen corresponding path program 41 times [2021-11-09 08:58:47,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:47,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895926787] [2021-11-09 08:58:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:47,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2416 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-11-09 08:58:48,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:48,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895926787] [2021-11-09 08:58:48,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895926787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:48,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102436349] [2021-11-09 08:58:48,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:58:48,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:48,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:48,767 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:48,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 08:59:30,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-11-09 08:59:30,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:31,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 08:59:31,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2416 backedges. 1 proven. 651 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2021-11-09 08:59:31,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102436349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:31,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:31,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 24] total 67 [2021-11-09 08:59:31,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826560239] [2021-11-09 08:59:31,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-09 08:59:31,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:31,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-09 08:59:31,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1265, Invalid=3157, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 08:59:31,865 INFO L87 Difference]: Start difference. First operand 225 states and 271 transitions. Second operand has 67 states, 67 states have (on average 2.5223880597014925) internal successors, (169), 67 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:32,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:32,102 INFO L93 Difference]: Finished difference Result 376 states and 474 transitions. [2021-11-09 08:59:32,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-09 08:59:32,103 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.5223880597014925) internal successors, (169), 67 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-11-09 08:59:32,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:32,104 INFO L225 Difference]: With dead ends: 376 [2021-11-09 08:59:32,105 INFO L226 Difference]: Without dead ends: 238 [2021-11-09 08:59:32,106 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1265, Invalid=3157, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 08:59:32,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-09 08:59:32,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 233. [2021-11-09 08:59:32,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.2112068965517242) internal successors, (281), 232 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:32,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 281 transitions. [2021-11-09 08:59:32,113 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 281 transitions. Word has length 159 [2021-11-09 08:59:32,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:32,114 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 281 transitions. [2021-11-09 08:59:32,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.5223880597014925) internal successors, (169), 67 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:32,114 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 281 transitions. [2021-11-09 08:59:32,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-09 08:59:32,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:32,115 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:32,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:32,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-09 08:59:32,325 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:32,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:32,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1844626645, now seen corresponding path program 42 times [2021-11-09 08:59:32,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:32,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640664098] [2021-11-09 08:59:32,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:32,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:32,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2021-11-09 08:59:33,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:33,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640664098] [2021-11-09 08:59:33,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640664098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:33,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455745169] [2021-11-09 08:59:33,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:59:33,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:33,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:33,265 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:33,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 08:59:58,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2021-11-09 08:59:58,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:58,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 08:59:58,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2021-11-09 08:59:59,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455745169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:59,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:59,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-11-09 08:59:59,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465962805] [2021-11-09 08:59:59,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-09 08:59:59,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:59,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-09 08:59:59,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 08:59:59,025 INFO L87 Difference]: Start difference. First operand 233 states and 281 transitions. Second operand has 47 states, 47 states have (on average 2.2127659574468086) internal successors, (104), 47 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:59,148 INFO L93 Difference]: Finished difference Result 380 states and 476 transitions. [2021-11-09 08:59:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-09 08:59:59,149 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.2127659574468086) internal successors, (104), 47 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-11-09 08:59:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:59,150 INFO L225 Difference]: With dead ends: 380 [2021-11-09 08:59:59,150 INFO L226 Difference]: Without dead ends: 236 [2021-11-09 08:59:59,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 08:59:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-09 08:59:59,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2021-11-09 08:59:59,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.2094017094017093) internal successors, (283), 234 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:59,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 283 transitions. [2021-11-09 08:59:59,162 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 283 transitions. Word has length 164 [2021-11-09 08:59:59,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:59,162 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 283 transitions. [2021-11-09 08:59:59,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.2127659574468086) internal successors, (104), 47 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:59,163 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 283 transitions. [2021-11-09 08:59:59,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-09 08:59:59,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:59,165 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:59,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-09 08:59:59,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:59,369 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:59,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:59,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1050437843, now seen corresponding path program 43 times [2021-11-09 08:59:59,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:59,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383719285] [2021-11-09 08:59:59,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:59,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:00:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2021-11-09 09:00:00,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:00:00,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383719285] [2021-11-09 09:00:00,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383719285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:00,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897146533] [2021-11-09 09:00:00,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:00:00,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:00,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:00:00,281 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:00:00,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 09:00:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:00:01,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 09:00:01,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:00:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2021-11-09 09:00:01,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897146533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:01,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:00:01,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-11-09 09:00:01,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065802277] [2021-11-09 09:00:01,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-09 09:00:01,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:00:01,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-09 09:00:01,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 09:00:01,857 INFO L87 Difference]: Start difference. First operand 235 states and 283 transitions. Second operand has 48 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:01,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:00:01,990 INFO L93 Difference]: Finished difference Result 382 states and 478 transitions. [2021-11-09 09:00:01,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 09:00:01,991 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-11-09 09:00:01,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:00:01,993 INFO L225 Difference]: With dead ends: 382 [2021-11-09 09:00:01,993 INFO L226 Difference]: Without dead ends: 238 [2021-11-09 09:00:01,994 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 09:00:01,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-09 09:00:02,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2021-11-09 09:00:02,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.2076271186440677) internal successors, (285), 236 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:02,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 285 transitions. [2021-11-09 09:00:02,002 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 285 transitions. Word has length 166 [2021-11-09 09:00:02,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:00:02,002 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 285 transitions. [2021-11-09 09:00:02,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:02,002 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 285 transitions. [2021-11-09 09:00:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-09 09:00:02,004 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:00:02,004 INFO L513 BasicCegarLoop]: trace histogram [45, 45, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:00:02,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-09 09:00:02,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:02,222 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:00:02,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:00:02,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1955789487, now seen corresponding path program 44 times [2021-11-09 09:00:02,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:00:02,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904823968] [2021-11-09 09:00:02,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:00:02,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:00:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:00:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2741 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2021-11-09 09:00:03,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:00:03,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904823968] [2021-11-09 09:00:03,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904823968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:03,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965028633] [2021-11-09 09:00:03,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:00:03,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:03,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:00:03,533 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:00:03,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 09:00:05,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:00:05,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:00:05,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 09:00:05,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:00:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2741 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2021-11-09 09:00:05,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965028633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:05,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:00:05,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-11-09 09:00:05,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044005767] [2021-11-09 09:00:05,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 09:00:05,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:00:05,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 09:00:05,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 09:00:05,657 INFO L87 Difference]: Start difference. First operand 237 states and 285 transitions. Second operand has 49 states, 49 states have (on average 2.204081632653061) internal successors, (108), 49 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:05,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:00:05,794 INFO L93 Difference]: Finished difference Result 384 states and 480 transitions. [2021-11-09 09:00:05,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-09 09:00:05,795 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.204081632653061) internal successors, (108), 49 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-09 09:00:05,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:00:05,796 INFO L225 Difference]: With dead ends: 384 [2021-11-09 09:00:05,797 INFO L226 Difference]: Without dead ends: 240 [2021-11-09 09:00:05,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 09:00:05,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-09 09:00:05,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2021-11-09 09:00:05,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.2058823529411764) internal successors, (287), 238 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:05,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 287 transitions. [2021-11-09 09:00:05,804 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 287 transitions. Word has length 168 [2021-11-09 09:00:05,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:00:05,805 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 287 transitions. [2021-11-09 09:00:05,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.204081632653061) internal successors, (108), 49 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:05,805 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 287 transitions. [2021-11-09 09:00:05,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-09 09:00:05,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:00:05,807 INFO L513 BasicCegarLoop]: trace histogram [46, 46, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:00:05,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-09 09:00:06,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:06,013 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:00:06,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:00:06,014 INFO L85 PathProgramCache]: Analyzing trace with hash 427263409, now seen corresponding path program 45 times [2021-11-09 09:00:06,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:00:06,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596995510] [2021-11-09 09:00:06,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:00:06,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:00:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:00:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2832 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2021-11-09 09:00:07,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:00:07,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596995510] [2021-11-09 09:00:07,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596995510] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:07,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501053687] [2021-11-09 09:00:07,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:00:07,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:07,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:00:07,035 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:00:07,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-09 09:00:09,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-09 09:00:09,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:00:09,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 09:00:09,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:00:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2832 backedges. 92 proven. 715 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2021-11-09 09:00:10,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501053687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:10,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:00:10,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 27] total 74 [2021-11-09 09:00:10,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046862898] [2021-11-09 09:00:10,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-09 09:00:10,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:00:10,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-09 09:00:10,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1574, Invalid=3828, Unknown=0, NotChecked=0, Total=5402 [2021-11-09 09:00:10,542 INFO L87 Difference]: Start difference. First operand 239 states and 287 transitions. Second operand has 74 states, 74 states have (on average 2.4594594594594597) internal successors, (182), 74 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:11,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:00:11,450 INFO L93 Difference]: Finished difference Result 397 states and 500 transitions. [2021-11-09 09:00:11,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-09 09:00:11,450 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.4594594594594597) internal successors, (182), 74 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-11-09 09:00:11,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:00:11,452 INFO L225 Difference]: With dead ends: 397 [2021-11-09 09:00:11,452 INFO L226 Difference]: Without dead ends: 253 [2021-11-09 09:00:11,453 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2172, Invalid=7140, Unknown=0, NotChecked=0, Total=9312 [2021-11-09 09:00:11,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-09 09:00:11,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2021-11-09 09:00:11,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.2056451612903225) internal successors, (299), 248 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:11,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 299 transitions. [2021-11-09 09:00:11,462 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 299 transitions. Word has length 170 [2021-11-09 09:00:11,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:00:11,462 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 299 transitions. [2021-11-09 09:00:11,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.4594594594594597) internal successors, (182), 74 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:11,463 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 299 transitions. [2021-11-09 09:00:11,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-09 09:00:11,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:00:11,464 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:00:11,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-09 09:00:11,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-09 09:00:11,673 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:00:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:00:11,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1721569395, now seen corresponding path program 46 times [2021-11-09 09:00:11,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:00:11,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138298115] [2021-11-09 09:00:11,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:00:11,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:00:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:00:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3087 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2021-11-09 09:00:12,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:00:12,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138298115] [2021-11-09 09:00:12,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138298115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:12,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975445883] [2021-11-09 09:00:12,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:00:12,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:12,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:00:12,848 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:00:12,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-09 09:00:14,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:00:14,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:00:14,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 09:00:14,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:00:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3087 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2021-11-09 09:00:14,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975445883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:14,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:00:14,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-11-09 09:00:14,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277991314] [2021-11-09 09:00:14,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-09 09:00:14,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:00:14,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-09 09:00:14,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 09:00:14,446 INFO L87 Difference]: Start difference. First operand 249 states and 299 transitions. Second operand has 52 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 52 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:14,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:00:14,712 INFO L93 Difference]: Finished difference Result 402 states and 502 transitions. [2021-11-09 09:00:14,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-09 09:00:14,713 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 52 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-11-09 09:00:14,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:00:14,715 INFO L225 Difference]: With dead ends: 402 [2021-11-09 09:00:14,715 INFO L226 Difference]: Without dead ends: 252 [2021-11-09 09:00:14,716 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 09:00:14,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-09 09:00:14,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2021-11-09 09:00:14,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.204) internal successors, (301), 250 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:14,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 301 transitions. [2021-11-09 09:00:14,725 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 301 transitions. Word has length 177 [2021-11-09 09:00:14,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:00:14,726 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 301 transitions. [2021-11-09 09:00:14,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 52 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:14,726 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 301 transitions. [2021-11-09 09:00:14,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-09 09:00:14,728 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:00:14,728 INFO L513 BasicCegarLoop]: trace histogram [49, 49, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:00:14,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-09 09:00:14,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-09 09:00:14,941 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:00:14,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:00:14,942 INFO L85 PathProgramCache]: Analyzing trace with hash -33708341, now seen corresponding path program 47 times [2021-11-09 09:00:14,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:00:14,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088540637] [2021-11-09 09:00:14,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:00:14,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:00:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:00:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3184 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2021-11-09 09:00:16,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:00:16,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088540637] [2021-11-09 09:00:16,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088540637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:16,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224378447] [2021-11-09 09:00:16,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:00:16,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:16,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:00:16,295 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:00:16,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-09 09:01:02,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-11-09 09:01:02,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:01:02,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 09:01:02,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:01:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3184 backedges. 1 proven. 782 refuted. 0 times theorem prover too weak. 2401 trivial. 0 not checked. [2021-11-09 09:01:03,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224378447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:01:03,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:01:03,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 26] total 76 [2021-11-09 09:01:03,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965189174] [2021-11-09 09:01:03,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-09 09:01:03,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:01:03,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-09 09:01:03,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1650, Invalid=4050, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 09:01:03,123 INFO L87 Difference]: Start difference. First operand 251 states and 301 transitions. Second operand has 76 states, 76 states have (on average 2.486842105263158) internal successors, (189), 76 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:01:03,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:01:03,356 INFO L93 Difference]: Finished difference Result 414 states and 520 transitions. [2021-11-09 09:01:03,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-09 09:01:03,356 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.486842105263158) internal successors, (189), 76 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2021-11-09 09:01:03,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:01:03,358 INFO L225 Difference]: With dead ends: 414 [2021-11-09 09:01:03,358 INFO L226 Difference]: Without dead ends: 264 [2021-11-09 09:01:03,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1650, Invalid=4050, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 09:01:03,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-09 09:01:03,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 259. [2021-11-09 09:01:03,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.2054263565891472) internal successors, (311), 258 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:01:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 311 transitions. [2021-11-09 09:01:03,367 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 311 transitions. Word has length 179 [2021-11-09 09:01:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:01:03,367 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 311 transitions. [2021-11-09 09:01:03,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.486842105263158) internal successors, (189), 76 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:01:03,368 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 311 transitions. [2021-11-09 09:01:03,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-09 09:01:03,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:01:03,370 INFO L513 BasicCegarLoop]: trace histogram [50, 50, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:01:03,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-09 09:01:03,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-09 09:01:03,585 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:01:03,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:01:03,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1712695993, now seen corresponding path program 48 times [2021-11-09 09:01:03,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:01:03,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14357835] [2021-11-09 09:01:03,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:01:03,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:01:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:01:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 853 trivial. 0 not checked. [2021-11-09 09:01:04,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:01:04,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14357835] [2021-11-09 09:01:04,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14357835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:01:04,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524629066] [2021-11-09 09:01:04,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:01:04,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:01:04,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:01:04,897 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:01:04,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-09 09:03:24,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2021-11-09 09:03:24,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:03:24,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 09:03:24,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:03:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 100 proven. 852 refuted. 0 times theorem prover too weak. 2401 trivial. 0 not checked. [2021-11-09 09:03:25,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524629066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:03:25,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:03:25,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 29] total 80 [2021-11-09 09:03:25,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449548636] [2021-11-09 09:03:25,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-09 09:03:25,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:03:25,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-09 09:03:25,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1835, Invalid=4485, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 09:03:25,372 INFO L87 Difference]: Start difference. First operand 259 states and 311 transitions. Second operand has 80 states, 80 states have (on average 2.45) internal successors, (196), 80 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:26,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:03:26,436 INFO L93 Difference]: Finished difference Result 429 states and 540 transitions. [2021-11-09 09:03:26,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-09 09:03:26,437 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.45) internal successors, (196), 80 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-09 09:03:26,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:03:26,439 INFO L225 Difference]: With dead ends: 429 [2021-11-09 09:03:26,439 INFO L226 Difference]: Without dead ends: 273 [2021-11-09 09:03:26,440 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2535, Invalid=8385, Unknown=0, NotChecked=0, Total=10920 [2021-11-09 09:03:26,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-09 09:03:26,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 269. [2021-11-09 09:03:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.205223880597015) internal successors, (323), 268 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 323 transitions. [2021-11-09 09:03:26,445 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 323 transitions. Word has length 184 [2021-11-09 09:03:26,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:03:26,446 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 323 transitions. [2021-11-09 09:03:26,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.45) internal successors, (196), 80 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 323 transitions. [2021-11-09 09:03:26,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-09 09:03:26,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:03:26,447 INFO L513 BasicCegarLoop]: trace histogram [52, 52, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:03:26,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-09 09:03:26,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:03:26,649 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:03:26,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:03:26,650 INFO L85 PathProgramCache]: Analyzing trace with hash -21240699, now seen corresponding path program 49 times [2021-11-09 09:03:26,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:03:26,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245505428] [2021-11-09 09:03:26,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:03:26,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:03:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:03:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3630 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2021-11-09 09:03:28,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:03:28,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245505428] [2021-11-09 09:03:28,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245505428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:03:28,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559311332] [2021-11-09 09:03:28,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:03:28,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:03:28,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:03:28,087 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:03:28,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-09 09:03:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:03:29,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-09 09:03:29,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:03:30,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3630 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2021-11-09 09:03:30,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559311332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:03:30,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:03:30,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-11-09 09:03:30,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315689700] [2021-11-09 09:03:30,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-09 09:03:30,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:03:30,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-09 09:03:30,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 09:03:30,094 INFO L87 Difference]: Start difference. First operand 269 states and 323 transitions. Second operand has 56 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 56 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:03:30,225 INFO L93 Difference]: Finished difference Result 434 states and 542 transitions. [2021-11-09 09:03:30,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-09 09:03:30,229 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 56 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-11-09 09:03:30,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:03:30,231 INFO L225 Difference]: With dead ends: 434 [2021-11-09 09:03:30,232 INFO L226 Difference]: Without dead ends: 272 [2021-11-09 09:03:30,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 09:03:30,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-09 09:03:30,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2021-11-09 09:03:30,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.2037037037037037) internal successors, (325), 270 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:30,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 325 transitions. [2021-11-09 09:03:30,240 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 325 transitions. Word has length 191 [2021-11-09 09:03:30,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:03:30,240 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 325 transitions. [2021-11-09 09:03:30,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 56 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:30,241 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 325 transitions. [2021-11-09 09:03:30,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-09 09:03:30,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:03:30,242 INFO L513 BasicCegarLoop]: trace histogram [53, 53, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:03:30,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-09 09:03:30,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:03:30,457 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:03:30,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:03:30,457 INFO L85 PathProgramCache]: Analyzing trace with hash -370272445, now seen corresponding path program 50 times [2021-11-09 09:03:30,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:03:30,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486540005] [2021-11-09 09:03:30,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:03:30,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:03:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:03:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3735 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2021-11-09 09:03:31,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:03:31,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486540005] [2021-11-09 09:03:31,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486540005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:03:31,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827932989] [2021-11-09 09:03:31,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:03:31,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:03:31,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:03:31,712 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:03:31,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-09 09:03:33,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:03:33,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:03:33,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 09:03:33,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:03:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3735 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2021-11-09 09:03:33,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827932989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:03:33,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:03:33,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-11-09 09:03:33,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362921233] [2021-11-09 09:03:33,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-09 09:03:33,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:03:33,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-09 09:03:33,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 09:03:33,750 INFO L87 Difference]: Start difference. First operand 271 states and 325 transitions. Second operand has 57 states, 57 states have (on average 2.175438596491228) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:33,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:03:33,900 INFO L93 Difference]: Finished difference Result 436 states and 544 transitions. [2021-11-09 09:03:33,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-09 09:03:33,901 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.175438596491228) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2021-11-09 09:03:33,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:03:33,903 INFO L225 Difference]: With dead ends: 436 [2021-11-09 09:03:33,903 INFO L226 Difference]: Without dead ends: 274 [2021-11-09 09:03:33,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 09:03:33,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-09 09:03:33,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2021-11-09 09:03:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.2022058823529411) internal successors, (327), 272 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:33,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 327 transitions. [2021-11-09 09:03:33,912 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 327 transitions. Word has length 193 [2021-11-09 09:03:33,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:03:33,913 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 327 transitions. [2021-11-09 09:03:33,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.175438596491228) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:33,913 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 327 transitions. [2021-11-09 09:03:33,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-09 09:03:33,915 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:03:33,915 INFO L513 BasicCegarLoop]: trace histogram [54, 54, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:03:33,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-09 09:03:34,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-09 09:03:34,141 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:03:34,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:03:34,142 INFO L85 PathProgramCache]: Analyzing trace with hash -782331263, now seen corresponding path program 51 times [2021-11-09 09:03:34,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:03:34,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468014481] [2021-11-09 09:03:34,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:03:34,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:03:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:03:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3842 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2021-11-09 09:03:35,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:03:35,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468014481] [2021-11-09 09:03:35,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468014481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:03:35,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131095331] [2021-11-09 09:03:35,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:03:35,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:03:35,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:03:35,496 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:03:35,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-09 09:03:38,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-11-09 09:03:38,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:03:38,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-09 09:03:38,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:03:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3842 backedges. 108 proven. 925 refuted. 0 times theorem prover too weak. 2809 trivial. 0 not checked. [2021-11-09 09:03:39,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131095331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:03:39,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:03:39,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 30] total 85 [2021-11-09 09:03:39,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511164167] [2021-11-09 09:03:39,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-09 09:03:39,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:03:39,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-09 09:03:39,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2088, Invalid=5052, Unknown=0, NotChecked=0, Total=7140 [2021-11-09 09:03:39,907 INFO L87 Difference]: Start difference. First operand 273 states and 327 transitions. Second operand has 85 states, 85 states have (on average 2.4352941176470586) internal successors, (207), 85 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:41,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:03:41,286 INFO L93 Difference]: Finished difference Result 449 states and 564 transitions. [2021-11-09 09:03:41,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-09 09:03:41,287 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.4352941176470586) internal successors, (207), 85 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-09 09:03:41,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:03:41,288 INFO L225 Difference]: With dead ends: 449 [2021-11-09 09:03:41,288 INFO L226 Difference]: Without dead ends: 287 [2021-11-09 09:03:41,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2842, Invalid=9368, Unknown=0, NotChecked=0, Total=12210 [2021-11-09 09:03:41,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-09 09:03:41,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 283. [2021-11-09 09:03:41,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.202127659574468) internal successors, (339), 282 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:41,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 339 transitions. [2021-11-09 09:03:41,297 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 339 transitions. Word has length 195 [2021-11-09 09:03:41,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:03:41,298 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 339 transitions. [2021-11-09 09:03:41,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.4352941176470586) internal successors, (207), 85 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:41,298 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 339 transitions. [2021-11-09 09:03:41,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-09 09:03:41,300 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:03:41,300 INFO L513 BasicCegarLoop]: trace histogram [56, 56, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:03:41,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-11-09 09:03:41,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:03:41,525 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:03:41,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:03:41,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1705531973, now seen corresponding path program 52 times [2021-11-09 09:03:41,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:03:41,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938691407] [2021-11-09 09:03:41,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:03:41,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:03:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:03:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4138 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2021-11-09 09:03:43,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:03:43,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938691407] [2021-11-09 09:03:43,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938691407] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:03:43,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946580958] [2021-11-09 09:03:43,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:03:43,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:03:43,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:03:43,018 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:03:43,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-09 09:03:44,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:03:44,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:03:44,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-09 09:03:44,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:03:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4138 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2021-11-09 09:03:45,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946580958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:03:45,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:03:45,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-11-09 09:03:45,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113958441] [2021-11-09 09:03:45,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-09 09:03:45,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:03:45,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-09 09:03:45,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 09:03:45,316 INFO L87 Difference]: Start difference. First operand 283 states and 339 transitions. Second operand has 60 states, 60 states have (on average 2.1666666666666665) internal successors, (130), 60 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:45,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:03:45,472 INFO L93 Difference]: Finished difference Result 454 states and 566 transitions. [2021-11-09 09:03:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-09 09:03:45,473 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1666666666666665) internal successors, (130), 60 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-11-09 09:03:45,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:03:45,474 INFO L225 Difference]: With dead ends: 454 [2021-11-09 09:03:45,475 INFO L226 Difference]: Without dead ends: 286 [2021-11-09 09:03:45,475 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 09:03:45,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-09 09:03:45,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2021-11-09 09:03:45,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.2007042253521127) internal successors, (341), 284 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:45,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 341 transitions. [2021-11-09 09:03:45,486 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 341 transitions. Word has length 202 [2021-11-09 09:03:45,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:03:45,486 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 341 transitions. [2021-11-09 09:03:45,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1666666666666665) internal successors, (130), 60 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:45,487 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 341 transitions. [2021-11-09 09:03:45,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-09 09:03:45,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:03:45,489 INFO L513 BasicCegarLoop]: trace histogram [57, 57, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:03:45,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-09 09:03:45,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:03:45,694 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:03:45,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:03:45,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1331406023, now seen corresponding path program 53 times [2021-11-09 09:03:45,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:03:45,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371550415] [2021-11-09 09:03:45,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:03:45,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:03:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:03:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4251 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2021-11-09 09:03:47,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:03:47,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371550415] [2021-11-09 09:03:47,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371550415] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:03:47,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932580650] [2021-11-09 09:03:47,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:03:47,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:03:47,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:03:47,442 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:03:47,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-09 09:04:49,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 57 check-sat command(s) [2021-11-09 09:04:49,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:04:49,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 09:04:49,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:04:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4251 backedges. 1 proven. 1001 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2021-11-09 09:04:51,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932580650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:04:51,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:04:51,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 29] total 87 [2021-11-09 09:04:51,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432659143] [2021-11-09 09:04:51,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-09 09:04:51,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:04:51,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-09 09:04:51,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2175, Invalid=5307, Unknown=0, NotChecked=0, Total=7482 [2021-11-09 09:04:51,321 INFO L87 Difference]: Start difference. First operand 285 states and 341 transitions. Second operand has 87 states, 87 states have (on average 2.4597701149425286) internal successors, (214), 87 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:51,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:04:51,612 INFO L93 Difference]: Finished difference Result 466 states and 584 transitions. [2021-11-09 09:04:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-09 09:04:51,613 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.4597701149425286) internal successors, (214), 87 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-11-09 09:04:51,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:04:51,614 INFO L225 Difference]: With dead ends: 466 [2021-11-09 09:04:51,614 INFO L226 Difference]: Without dead ends: 298 [2021-11-09 09:04:51,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2175, Invalid=5307, Unknown=0, NotChecked=0, Total=7482 [2021-11-09 09:04:51,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-09 09:04:51,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 293. [2021-11-09 09:04:51,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.202054794520548) internal successors, (351), 292 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:51,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 351 transitions. [2021-11-09 09:04:51,624 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 351 transitions. Word has length 204 [2021-11-09 09:04:51,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:04:51,624 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 351 transitions. [2021-11-09 09:04:51,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.4597701149425286) internal successors, (214), 87 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:51,625 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 351 transitions. [2021-11-09 09:04:51,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-09 09:04:51,626 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:04:51,627 INFO L513 BasicCegarLoop]: trace histogram [58, 58, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:04:51,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-11-09 09:04:51,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:04:51,853 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:04:51,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:04:51,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1700917881, now seen corresponding path program 54 times [2021-11-09 09:04:51,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:04:51,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067072356] [2021-11-09 09:04:51,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:04:51,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:04:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:04:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4445 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-11-09 09:04:53,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:04:53,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067072356] [2021-11-09 09:04:53,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067072356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:04:53,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848997450] [2021-11-09 09:04:53,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:04:53,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:04:53,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:04:53,625 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:04:53,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-09 09:08:40,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2021-11-09 09:08:40,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:08:41,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 09:08:41,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:08:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4445 backedges. 116 proven. 1080 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2021-11-09 09:08:42,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848997450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:08:42,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:08:42,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 32] total 91 [2021-11-09 09:08:42,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303662966] [2021-11-09 09:08:42,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-09 09:08:42,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:08:42,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-09 09:08:42,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2387, Invalid=5803, Unknown=0, NotChecked=0, Total=8190 [2021-11-09 09:08:42,426 INFO L87 Difference]: Start difference. First operand 293 states and 351 transitions. Second operand has 91 states, 91 states have (on average 2.4285714285714284) internal successors, (221), 91 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:08:43,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:08:43,752 INFO L93 Difference]: Finished difference Result 481 states and 604 transitions. [2021-11-09 09:08:43,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-09 09:08:43,752 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.4285714285714284) internal successors, (221), 91 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2021-11-09 09:08:43,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:08:43,754 INFO L225 Difference]: With dead ends: 481 [2021-11-09 09:08:43,754 INFO L226 Difference]: Without dead ends: 307 [2021-11-09 09:08:43,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3255, Invalid=10787, Unknown=0, NotChecked=0, Total=14042 [2021-11-09 09:08:43,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-09 09:08:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 303. [2021-11-09 09:08:43,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.2019867549668874) internal successors, (363), 302 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:08:43,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 363 transitions. [2021-11-09 09:08:43,768 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 363 transitions. Word has length 209 [2021-11-09 09:08:43,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:08:43,769 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 363 transitions. [2021-11-09 09:08:43,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.4285714285714284) internal successors, (221), 91 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:08:43,769 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 363 transitions. [2021-11-09 09:08:43,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-09 09:08:43,771 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:08:43,771 INFO L513 BasicCegarLoop]: trace histogram [60, 60, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:08:43,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-09 09:08:43,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-09 09:08:43,997 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:08:43,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:08:43,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1806409805, now seen corresponding path program 55 times [2021-11-09 09:08:43,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:08:43,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521705298] [2021-11-09 09:08:43,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:08:43,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:08:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:08:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4763 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 1163 trivial. 0 not checked. [2021-11-09 09:08:45,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:08:45,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521705298] [2021-11-09 09:08:45,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521705298] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:08:45,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480946625] [2021-11-09 09:08:45,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:08:45,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:08:45,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:08:45,579 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:08:45,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-09 09:08:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:08:47,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-09 09:08:47,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:08:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4763 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 1163 trivial. 0 not checked. [2021-11-09 09:08:47,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480946625] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:08:47,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:08:47,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-11-09 09:08:47,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776888868] [2021-11-09 09:08:47,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-09 09:08:47,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:08:47,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-09 09:08:47,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 09:08:47,990 INFO L87 Difference]: Start difference. First operand 303 states and 363 transitions. Second operand has 64 states, 64 states have (on average 2.15625) internal successors, (138), 64 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:08:48,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:08:48,141 INFO L93 Difference]: Finished difference Result 486 states and 606 transitions. [2021-11-09 09:08:48,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-09 09:08:48,141 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.15625) internal successors, (138), 64 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2021-11-09 09:08:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:08:48,143 INFO L225 Difference]: With dead ends: 486 [2021-11-09 09:08:48,143 INFO L226 Difference]: Without dead ends: 306 [2021-11-09 09:08:48,145 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 09:08:48,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-09 09:08:48,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2021-11-09 09:08:48,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.200657894736842) internal successors, (365), 304 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:08:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 365 transitions. [2021-11-09 09:08:48,154 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 365 transitions. Word has length 216 [2021-11-09 09:08:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:08:48,155 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 365 transitions. [2021-11-09 09:08:48,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.15625) internal successors, (138), 64 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:08:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 365 transitions. [2021-11-09 09:08:48,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-09 09:08:48,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:08:48,157 INFO L513 BasicCegarLoop]: trace histogram [61, 61, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:08:48,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-09 09:08:48,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-09 09:08:48,373 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:08:48,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:08:48,374 INFO L85 PathProgramCache]: Analyzing trace with hash -297705649, now seen corresponding path program 56 times [2021-11-09 09:08:48,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:08:48,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985847089] [2021-11-09 09:08:48,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:08:48,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:08:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:08:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4884 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 1163 trivial. 0 not checked. [2021-11-09 09:08:49,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:08:49,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985847089] [2021-11-09 09:08:49,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985847089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:08:49,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141424925] [2021-11-09 09:08:49,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:08:49,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:08:49,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:08:49,911 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:08:49,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-09 09:08:51,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:08:51,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:08:51,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-09 09:08:51,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:08:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4884 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 1163 trivial. 0 not checked. [2021-11-09 09:08:52,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141424925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:08:52,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:08:52,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2021-11-09 09:08:52,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534745971] [2021-11-09 09:08:52,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-09 09:08:52,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:08:52,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-09 09:08:52,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 09:08:52,390 INFO L87 Difference]: Start difference. First operand 305 states and 365 transitions. Second operand has 65 states, 65 states have (on average 2.1538461538461537) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:08:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:08:52,574 INFO L93 Difference]: Finished difference Result 488 states and 608 transitions. [2021-11-09 09:08:52,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-09 09:08:52,575 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.1538461538461537) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2021-11-09 09:08:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:08:52,604 INFO L225 Difference]: With dead ends: 488 [2021-11-09 09:08:52,605 INFO L226 Difference]: Without dead ends: 308 [2021-11-09 09:08:52,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 09:08:52,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-09 09:08:52,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 307. [2021-11-09 09:08:52,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.1993464052287581) internal successors, (367), 306 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:08:52,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 367 transitions. [2021-11-09 09:08:52,612 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 367 transitions. Word has length 218 [2021-11-09 09:08:52,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:08:52,613 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 367 transitions. [2021-11-09 09:08:52,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.1538461538461537) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:08:52,613 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 367 transitions. [2021-11-09 09:08:52,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-09 09:08:52,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:08:52,630 INFO L513 BasicCegarLoop]: trace histogram [62, 62, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:08:52,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-09 09:08:52,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-09 09:08:52,831 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:08:52,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:08:52,831 INFO L85 PathProgramCache]: Analyzing trace with hash 576939473, now seen corresponding path program 57 times [2021-11-09 09:08:52,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:08:52,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147595179] [2021-11-09 09:08:52,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:08:52,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:08:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:08:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5007 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 1163 trivial. 0 not checked. [2021-11-09 09:08:54,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:08:54,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147595179] [2021-11-09 09:08:54,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147595179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:08:54,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73791678] [2021-11-09 09:08:54,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:08:54,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:08:54,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:08:54,581 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:08:54,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-09 09:08:58,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-11-09 09:08:58,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:08:58,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 09:08:58,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5007 backedges. 124 proven. 1162 refuted. 0 times theorem prover too weak. 3721 trivial. 0 not checked. [2021-11-09 09:09:00,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73791678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:00,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:00,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 33] total 96 [2021-11-09 09:09:00,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201563083] [2021-11-09 09:09:00,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-09 09:09:00,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:00,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-09 09:09:00,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2675, Invalid=6445, Unknown=0, NotChecked=0, Total=9120 [2021-11-09 09:09:00,475 INFO L87 Difference]: Start difference. First operand 307 states and 367 transitions. Second operand has 96 states, 96 states have (on average 2.4166666666666665) internal successors, (232), 96 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:01,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:01,991 INFO L93 Difference]: Finished difference Result 501 states and 628 transitions. [2021-11-09 09:09:01,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-09 09:09:01,992 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.4166666666666665) internal successors, (232), 96 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2021-11-09 09:09:01,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:01,993 INFO L225 Difference]: With dead ends: 501 [2021-11-09 09:09:01,993 INFO L226 Difference]: Without dead ends: 321 [2021-11-09 09:09:01,994 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2262 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3603, Invalid=11897, Unknown=0, NotChecked=0, Total=15500 [2021-11-09 09:09:01,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-09 09:09:01,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 317. [2021-11-09 09:09:02,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.1993670886075949) internal successors, (379), 316 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:02,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 379 transitions. [2021-11-09 09:09:02,001 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 379 transitions. Word has length 220 [2021-11-09 09:09:02,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:02,001 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 379 transitions. [2021-11-09 09:09:02,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.4166666666666665) internal successors, (232), 96 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:02,002 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 379 transitions. [2021-11-09 09:09:02,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-09 09:09:02,004 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:02,004 INFO L513 BasicCegarLoop]: trace histogram [64, 64, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:02,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:02,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-09 09:09:02,217 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:02,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:02,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1529209965, now seen corresponding path program 58 times [2021-11-09 09:09:02,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:02,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538773359] [2021-11-09 09:09:02,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:02,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5344 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2021-11-09 09:09:03,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:03,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538773359] [2021-11-09 09:09:03,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538773359] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:03,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288711624] [2021-11-09 09:09:03,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:09:03,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:03,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:03,966 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:03,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-09 09:09:06,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:09:06,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:09:06,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-09 09:09:06,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5344 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2021-11-09 09:09:06,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288711624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:06,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:06,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2021-11-09 09:09:06,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558078532] [2021-11-09 09:09:06,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-09 09:09:06,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:06,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-09 09:09:06,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 09:09:06,682 INFO L87 Difference]: Start difference. First operand 317 states and 379 transitions. Second operand has 68 states, 68 states have (on average 2.1470588235294117) internal successors, (146), 68 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:06,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:06,897 INFO L93 Difference]: Finished difference Result 506 states and 630 transitions. [2021-11-09 09:09:06,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-09 09:09:06,898 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1470588235294117) internal successors, (146), 68 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 227 [2021-11-09 09:09:06,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:06,900 INFO L225 Difference]: With dead ends: 506 [2021-11-09 09:09:06,900 INFO L226 Difference]: Without dead ends: 320 [2021-11-09 09:09:06,901 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 09:09:06,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-09 09:09:06,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 319. [2021-11-09 09:09:06,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.1981132075471699) internal successors, (381), 318 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:06,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 381 transitions. [2021-11-09 09:09:06,909 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 381 transitions. Word has length 227 [2021-11-09 09:09:06,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:06,909 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 381 transitions. [2021-11-09 09:09:06,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1470588235294117) internal successors, (146), 68 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:06,910 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 381 transitions. [2021-11-09 09:09:06,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-09 09:09:06,912 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:06,912 INFO L513 BasicCegarLoop]: trace histogram [65, 65, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:06,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:07,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:07,125 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:07,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:07,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1932922923, now seen corresponding path program 59 times [2021-11-09 09:09:07,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:07,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283156875] [2021-11-09 09:09:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:07,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5473 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2021-11-09 09:09:08,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:08,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283156875] [2021-11-09 09:09:08,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283156875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:08,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039165688] [2021-11-09 09:09:08,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:09:08,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:08,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:08,841 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:08,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65f071d-ffc1-43a3-9719-7f1f4ba1c77d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process