./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.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_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/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_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/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_681eb10b-8852-44e5-82fe-50d5dfd979ea/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 cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:18:48,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:18:48,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:18:48,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:18:48,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:18:48,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:18:48,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:18:48,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:18:48,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:18:48,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:18:48,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:18:48,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:18:48,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:18:48,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:18:48,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:18:48,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:18:48,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:18:48,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:18:48,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:18:48,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:18:48,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:18:48,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:18:48,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:18:48,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:18:48,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:18:48,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:18:48,873 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:18:48,875 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:18:48,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:18:48,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:18:48,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:18:48,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:18:48,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:18:48,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:18:48,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:18:48,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:18:48,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:18:48,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:18:48,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:18:48,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:18:48,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:18:48,889 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:18:48,924 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:18:48,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:18:48,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:18:48,925 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:18:48,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:18:48,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:18:48,927 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:18:48,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:18:48,927 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:18:48,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:18:48,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:18:48,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:18:48,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:18:48,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:18:48,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:18:48,929 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:18:48,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:18:48,929 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:18:48,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:18:48,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:18:48,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:18:48,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:18:48,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:18:48,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:18:48,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:18:48,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:18:48,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:18:48,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:18:48,932 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:18:48,932 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:18:48,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:18:48,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:18:48,933 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_681eb10b-8852-44e5-82fe-50d5dfd979ea/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c [2021-11-09 09:18:49,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:18:49,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:18:49,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:18:49,215 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:18:49,216 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:18:49,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2021-11-09 09:18:49,310 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/data/bf7f12b12/7db27a75b9294aae8f01b23a44a77f61/FLAGa9d7fc382 [2021-11-09 09:18:49,836 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:18:49,837 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2021-11-09 09:18:49,844 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/data/bf7f12b12/7db27a75b9294aae8f01b23a44a77f61/FLAGa9d7fc382 [2021-11-09 09:18:50,200 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/data/bf7f12b12/7db27a75b9294aae8f01b23a44a77f61 [2021-11-09 09:18:50,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:18:50,203 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:18:50,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:18:50,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:18:50,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:18:50,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:18:50" (1/1) ... [2021-11-09 09:18:50,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52b276fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:50, skipping insertion in model container [2021-11-09 09:18:50,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:18:50" (1/1) ... [2021-11-09 09:18:50,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:18:50,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:18:50,404 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_681eb10b-8852-44e5-82fe-50d5dfd979ea/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2021-11-09 09:18:50,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:18:50,433 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:18:50,445 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_681eb10b-8852-44e5-82fe-50d5dfd979ea/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2021-11-09 09:18:50,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:18:50,472 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:18:50,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:50 WrapperNode [2021-11-09 09:18:50,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:18:50,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:18:50,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:18:50,475 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:18:50,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:50" (1/1) ... [2021-11-09 09:18:50,488 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:50" (1/1) ... [2021-11-09 09:18:50,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:18:50,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:18:50,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:18:50,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:18:50,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:50" (1/1) ... [2021-11-09 09:18:50,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:50" (1/1) ... [2021-11-09 09:18:50,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:50" (1/1) ... [2021-11-09 09:18:50,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:50" (1/1) ... [2021-11-09 09:18:50,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:50" (1/1) ... [2021-11-09 09:18:50,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:50" (1/1) ... [2021-11-09 09:18:50,543 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:50" (1/1) ... [2021-11-09 09:18:50,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:18:50,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:18:50,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:18:50,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:18:50,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:50" (1/1) ... [2021-11-09 09:18:50,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:18:50,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:50,586 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:18:50,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:18:50,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:18:50,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:18:50,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:18:50,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:18:50,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:18:50,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:18:50,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:18:50,889 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:18:50,889 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-11-09 09:18:50,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:18:50 BoogieIcfgContainer [2021-11-09 09:18:50,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:18:50,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:18:50,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:18:50,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:18:50,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:18:50" (1/3) ... [2021-11-09 09:18:50,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111271b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:18:50, skipping insertion in model container [2021-11-09 09:18:50,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:50" (2/3) ... [2021-11-09 09:18:50,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111271b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:18:50, skipping insertion in model container [2021-11-09 09:18:50,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:18:50" (3/3) ... [2021-11-09 09:18:50,912 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2021-11-09 09:18:50,918 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:18:50,918 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-09 09:18:50,982 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:18:50,990 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 09:18:50,990 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-09 09:18:51,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 39 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:51,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 09:18:51,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:51,027 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:51,028 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:51,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:51,034 INFO L85 PathProgramCache]: Analyzing trace with hash 305970967, now seen corresponding path program 1 times [2021-11-09 09:18:51,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:51,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534797132] [2021-11-09 09:18:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:51,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:51,199 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 09:18:51,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:51,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534797132] [2021-11-09 09:18:51,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534797132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:51,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:51,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:18:51,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037576354] [2021-11-09 09:18:51,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:18:51,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:51,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:18:51,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:18:51,228 INFO L87 Difference]: Start difference. First operand has 40 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 39 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 09:18:51,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:51,317 INFO L93 Difference]: Finished difference Result 100 states and 154 transitions. [2021-11-09 09:18:51,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:18:51,319 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 09:18:51,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:51,330 INFO L225 Difference]: With dead ends: 100 [2021-11-09 09:18:51,330 INFO L226 Difference]: Without dead ends: 60 [2021-11-09 09:18:51,333 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 09:18:51,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-09 09:18:51,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 38. [2021-11-09 09:18:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 37 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:51,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-11-09 09:18:51,372 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 10 [2021-11-09 09:18:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:51,373 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-11-09 09:18:51,373 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 09:18:51,373 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-11-09 09:18:51,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 09:18:51,374 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:51,374 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:51,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:18:51,375 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:51,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2104069184, now seen corresponding path program 1 times [2021-11-09 09:18:51,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:51,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646976330] [2021-11-09 09:18:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:51,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:51,432 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 09:18:51,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:51,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646976330] [2021-11-09 09:18:51,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646976330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:51,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455684488] [2021-11-09 09:18:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:51,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:51,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:51,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:51,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:18:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:51,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 09:18:51,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:51,597 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 09:18:51,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455684488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:51,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:18:51,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-09 09:18:51,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85231816] [2021-11-09 09:18:51,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:18:51,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:51,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:18:51,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:18:51,610 INFO L87 Difference]: Start difference. First operand 38 states and 47 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 09:18:51,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:51,687 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2021-11-09 09:18:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:18:51,688 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 09:18:51,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:51,691 INFO L225 Difference]: With dead ends: 90 [2021-11-09 09:18:51,693 INFO L226 Difference]: Without dead ends: 59 [2021-11-09 09:18:51,694 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 09:18:51,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-09 09:18:51,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2021-11-09 09:18:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.358974358974359) internal successors, (53), 41 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 09:18:51,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2021-11-09 09:18:51,714 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 14 [2021-11-09 09:18:51,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:51,714 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2021-11-09 09:18:51,716 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 09:18:51,717 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2021-11-09 09:18:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 09:18:51,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:51,720 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:51,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:51,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:51,934 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:51,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:51,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2046810882, now seen corresponding path program 1 times [2021-11-09 09:18:51,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:51,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175312733] [2021-11-09 09:18:51,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:51,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:52,019 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 09:18:52,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:52,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175312733] [2021-11-09 09:18:52,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175312733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:52,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157619686] [2021-11-09 09:18:52,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:52,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:52,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:52,026 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:52,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:18:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:52,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:18:52,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:52,182 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 09:18:52,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157619686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:52,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:18:52,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-09 09:18:52,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771212361] [2021-11-09 09:18:52,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:18:52,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:52,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:18:52,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:18:52,190 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:52,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:52,281 INFO L93 Difference]: Finished difference Result 133 states and 172 transitions. [2021-11-09 09:18:52,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:18:52,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-09 09:18:52,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:52,286 INFO L225 Difference]: With dead ends: 133 [2021-11-09 09:18:52,287 INFO L226 Difference]: Without dead ends: 96 [2021-11-09 09:18:52,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 09:18:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-09 09:18:52,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 66. [2021-11-09 09:18:52,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 63 states have (on average 1.380952380952381) internal successors, (87), 65 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 09:18:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 87 transitions. [2021-11-09 09:18:52,313 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 87 transitions. Word has length 14 [2021-11-09 09:18:52,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:52,314 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 87 transitions. [2021-11-09 09:18:52,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:52,314 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 87 transitions. [2021-11-09 09:18:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 09:18:52,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:52,316 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:52,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:52,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-09 09:18:52,543 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:52,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:52,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1213023364, now seen corresponding path program 2 times [2021-11-09 09:18:52,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:52,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947182183] [2021-11-09 09:18:52,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:52,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:18:52,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:52,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947182183] [2021-11-09 09:18:52,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947182183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:52,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:52,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:18:52,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834494362] [2021-11-09 09:18:52,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:18:52,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:52,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:18:52,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:18:52,652 INFO L87 Difference]: Start difference. First operand 66 states and 87 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 09:18:52,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:52,731 INFO L93 Difference]: Finished difference Result 124 states and 160 transitions. [2021-11-09 09:18:52,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:18:52,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 16 [2021-11-09 09:18:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:52,732 INFO L225 Difference]: With dead ends: 124 [2021-11-09 09:18:52,732 INFO L226 Difference]: Without dead ends: 74 [2021-11-09 09:18:52,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:18:52,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-09 09:18:52,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2021-11-09 09:18:52,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 64 states have (on average 1.375) internal successors, (88), 66 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 09:18:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2021-11-09 09:18:52,749 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 16 [2021-11-09 09:18:52,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:52,750 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2021-11-09 09:18:52,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 09:18:52,750 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2021-11-09 09:18:52,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 09:18:52,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:52,752 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 09:18:52,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:18:52,752 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:52,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:52,753 INFO L85 PathProgramCache]: Analyzing trace with hash 851634768, now seen corresponding path program 1 times [2021-11-09 09:18:52,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:52,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709097169] [2021-11-09 09:18:52,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:52,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:18:52,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:52,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709097169] [2021-11-09 09:18:52,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709097169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:52,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063459496] [2021-11-09 09:18:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:52,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:52,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:52,858 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:52,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:18:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:52,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:18:52,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:53,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063459496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:53,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:18:53,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-09 09:18:53,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294157428] [2021-11-09 09:18:53,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:18:53,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:53,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:18:53,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:18:53,018 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 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 09:18:53,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:53,204 INFO L93 Difference]: Finished difference Result 198 states and 262 transitions. [2021-11-09 09:18:53,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:18:53,204 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 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 09:18:53,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:53,206 INFO L225 Difference]: With dead ends: 198 [2021-11-09 09:18:53,206 INFO L226 Difference]: Without dead ends: 138 [2021-11-09 09:18:53,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:18:53,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-09 09:18:53,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 97. [2021-11-09 09:18:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 94 states have (on average 1.372340425531915) internal successors, (129), 96 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 129 transitions. [2021-11-09 09:18:53,239 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 129 transitions. Word has length 19 [2021-11-09 09:18:53,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:53,240 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 129 transitions. [2021-11-09 09:18:53,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 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 09:18:53,240 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 129 transitions. [2021-11-09 09:18:53,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:18:53,241 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:53,241 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 09:18:53,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:53,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:53,470 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:53,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:53,471 INFO L85 PathProgramCache]: Analyzing trace with hash -392705404, now seen corresponding path program 2 times [2021-11-09 09:18:53,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:53,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421750362] [2021-11-09 09:18:53,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:53,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 09:18:53,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:53,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421750362] [2021-11-09 09:18:53,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421750362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:53,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:53,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:18:53,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609103870] [2021-11-09 09:18:53,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:18:53,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:53,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:18:53,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:18:53,561 INFO L87 Difference]: Start difference. First operand 97 states and 129 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:53,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:53,625 INFO L93 Difference]: Finished difference Result 165 states and 219 transitions. [2021-11-09 09:18:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:18:53,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-09 09:18:53,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:53,626 INFO L225 Difference]: With dead ends: 165 [2021-11-09 09:18:53,627 INFO L226 Difference]: Without dead ends: 94 [2021-11-09 09:18:53,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:18:53,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-09 09:18:53,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2021-11-09 09:18:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 89 states have (on average 1.3595505617977528) internal successors, (121), 91 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 09:18:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2021-11-09 09:18:53,643 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 24 [2021-11-09 09:18:53,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:53,643 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2021-11-09 09:18:53,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:53,643 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2021-11-09 09:18:53,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 09:18:53,644 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:53,644 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:53,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:18:53,645 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:53,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:53,645 INFO L85 PathProgramCache]: Analyzing trace with hash 709808073, now seen corresponding path program 1 times [2021-11-09 09:18:53,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:53,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216842731] [2021-11-09 09:18:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:53,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:18:53,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:53,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216842731] [2021-11-09 09:18:53,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216842731] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:53,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781850870] [2021-11-09 09:18:53,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:53,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:53,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:53,754 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:53,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:18:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:53,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:18:53,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:18:53,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781850870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:53,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:18:53,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-09 09:18:53,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063634745] [2021-11-09 09:18:53,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:18:53,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:53,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:18:53,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:18:53,886 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:53,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:53,997 INFO L93 Difference]: Finished difference Result 235 states and 307 transitions. [2021-11-09 09:18:53,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:18:53,998 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 09:18:53,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:53,999 INFO L225 Difference]: With dead ends: 235 [2021-11-09 09:18:53,999 INFO L226 Difference]: Without dead ends: 152 [2021-11-09 09:18:54,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:18:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-09 09:18:54,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 116. [2021-11-09 09:18:54,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 113 states have (on average 1.3716814159292035) internal successors, (155), 115 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 09:18:54,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 155 transitions. [2021-11-09 09:18:54,009 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 155 transitions. Word has length 25 [2021-11-09 09:18:54,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:54,009 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 155 transitions. [2021-11-09 09:18:54,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:54,010 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 155 transitions. [2021-11-09 09:18:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 09:18:54,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:54,011 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:54,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:54,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:54,218 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:54,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:54,219 INFO L85 PathProgramCache]: Analyzing trace with hash 518766855, now seen corresponding path program 2 times [2021-11-09 09:18:54,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:54,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079381780] [2021-11-09 09:18:54,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:54,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:18:54,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:54,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079381780] [2021-11-09 09:18:54,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079381780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:54,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483424021] [2021-11-09 09:18:54,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:18:54,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:54,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:54,311 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:54,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:18:54,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:18:54,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:18:54,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:18:54,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:18:54,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483424021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:54,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:18:54,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-09 09:18:54,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905349228] [2021-11-09 09:18:54,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:18:54,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:54,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:18:54,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:18:54,489 INFO L87 Difference]: Start difference. First operand 116 states and 155 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:54,615 INFO L93 Difference]: Finished difference Result 285 states and 375 transitions. [2021-11-09 09:18:54,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:18:54,616 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-09 09:18:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:54,617 INFO L225 Difference]: With dead ends: 285 [2021-11-09 09:18:54,617 INFO L226 Difference]: Without dead ends: 180 [2021-11-09 09:18:54,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 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 09:18:54,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-09 09:18:54,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 140. [2021-11-09 09:18:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 137 states have (on average 1.3795620437956204) internal successors, (189), 139 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 09:18:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 189 transitions. [2021-11-09 09:18:54,650 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 189 transitions. Word has length 27 [2021-11-09 09:18:54,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:54,651 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 189 transitions. [2021-11-09 09:18:54,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:54,651 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 189 transitions. [2021-11-09 09:18:54,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:18:54,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:54,653 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:54,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:54,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-09 09:18:54,866 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:54,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:54,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1611750085, now seen corresponding path program 3 times [2021-11-09 09:18:54,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:54,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947742555] [2021-11-09 09:18:54,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:54,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:18:54,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:54,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947742555] [2021-11-09 09:18:54,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947742555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:54,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542083833] [2021-11-09 09:18:54,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:18:54,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:54,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:54,952 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:54,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:18:55,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:18:55,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:18:55,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:18:55,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-09 09:18:55,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542083833] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:55,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:18:55,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-11-09 09:18:55,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090443333] [2021-11-09 09:18:55,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:18:55,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:55,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:18:55,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=71, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:18:55,152 INFO L87 Difference]: Start difference. First operand 140 states and 189 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 09:18:55,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:55,227 INFO L93 Difference]: Finished difference Result 270 states and 365 transitions. [2021-11-09 09:18:55,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:18:55,228 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 29 [2021-11-09 09:18:55,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:55,230 INFO L225 Difference]: With dead ends: 270 [2021-11-09 09:18:55,231 INFO L226 Difference]: Without dead ends: 159 [2021-11-09 09:18:55,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=85, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:18:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-09 09:18:55,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 142. [2021-11-09 09:18:55,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 139 states have (on average 1.381294964028777) internal successors, (192), 141 states have internal predecessors, (192), 0 states have call successors, (0), 0 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 09:18:55,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 192 transitions. [2021-11-09 09:18:55,240 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 192 transitions. Word has length 29 [2021-11-09 09:18:55,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:55,240 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 192 transitions. [2021-11-09 09:18:55,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 09:18:55,241 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 192 transitions. [2021-11-09 09:18:55,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:18:55,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:55,242 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:55,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:55,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-09 09:18:55,470 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:55,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:55,471 INFO L85 PathProgramCache]: Analyzing trace with hash -163257277, now seen corresponding path program 1 times [2021-11-09 09:18:55,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:55,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738343491] [2021-11-09 09:18:55,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:55,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:18:55,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:55,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738343491] [2021-11-09 09:18:55,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738343491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:55,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461589979] [2021-11-09 09:18:55,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:55,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:55,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:55,554 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:55,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:18:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:55,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:18:55,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:18:55,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461589979] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:55,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:18:55,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-09 09:18:55,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645550228] [2021-11-09 09:18:55,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:18:55,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:55,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:18:55,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:18:55,749 INFO L87 Difference]: Start difference. First operand 142 states and 192 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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 09:18:55,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:55,894 INFO L93 Difference]: Finished difference Result 339 states and 449 transitions. [2021-11-09 09:18:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:18:55,895 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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 29 [2021-11-09 09:18:55,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:55,896 INFO L225 Difference]: With dead ends: 339 [2021-11-09 09:18:55,896 INFO L226 Difference]: Without dead ends: 210 [2021-11-09 09:18:55,897 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:18:55,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-09 09:18:55,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2021-11-09 09:18:55,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 163 states have (on average 1.3865030674846626) internal successors, (226), 165 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:55,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 226 transitions. [2021-11-09 09:18:55,906 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 226 transitions. Word has length 29 [2021-11-09 09:18:55,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:55,907 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 226 transitions. [2021-11-09 09:18:55,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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 09:18:55,907 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 226 transitions. [2021-11-09 09:18:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 09:18:55,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:55,911 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:55,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:56,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 09:18:56,134 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:56,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:56,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2073360767, now seen corresponding path program 2 times [2021-11-09 09:18:56,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:56,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199569121] [2021-11-09 09:18:56,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:56,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:18:56,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:56,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199569121] [2021-11-09 09:18:56,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199569121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:56,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842561672] [2021-11-09 09:18:56,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:18:56,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:56,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:56,242 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:56,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:18:56,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:18:56,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:18:56,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 09:18:56,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:56,455 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:18:56,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842561672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:56,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:18:56,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-09 09:18:56,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067270119] [2021-11-09 09:18:56,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:18:56,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:56,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:18:56,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:18:56,459 INFO L87 Difference]: Start difference. First operand 166 states and 226 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:56,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:56,601 INFO L93 Difference]: Finished difference Result 389 states and 517 transitions. [2021-11-09 09:18:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:18:56,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-09 09:18:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:56,604 INFO L225 Difference]: With dead ends: 389 [2021-11-09 09:18:56,604 INFO L226 Difference]: Without dead ends: 238 [2021-11-09 09:18:56,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:18:56,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-09 09:18:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 190. [2021-11-09 09:18:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 187 states have (on average 1.3903743315508021) internal successors, (260), 189 states have internal predecessors, (260), 0 states have call successors, (0), 0 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 09:18:56,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 260 transitions. [2021-11-09 09:18:56,617 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 260 transitions. Word has length 31 [2021-11-09 09:18:56,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:56,617 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 260 transitions. [2021-11-09 09:18:56,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:56,617 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 260 transitions. [2021-11-09 09:18:56,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 09:18:56,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:56,618 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:56,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:56,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 09:18:56,822 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:56,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:56,823 INFO L85 PathProgramCache]: Analyzing trace with hash 563188031, now seen corresponding path program 3 times [2021-11-09 09:18:56,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:56,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96983159] [2021-11-09 09:18:56,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:56,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:18:56,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:56,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96983159] [2021-11-09 09:18:56,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96983159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:56,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235509015] [2021-11-09 09:18:56,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:18:56,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:56,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:56,913 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:56,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:18:57,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:18:57,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:18:57,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:18:57,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-09 09:18:57,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235509015] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:57,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:18:57,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2021-11-09 09:18:57,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777807901] [2021-11-09 09:18:57,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:18:57,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:57,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:18:57,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:18:57,117 INFO L87 Difference]: Start difference. First operand 190 states and 260 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:57,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:57,384 INFO L93 Difference]: Finished difference Result 465 states and 625 transitions. [2021-11-09 09:18:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:18:57,385 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-09 09:18:57,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:57,387 INFO L225 Difference]: With dead ends: 465 [2021-11-09 09:18:57,387 INFO L226 Difference]: Without dead ends: 292 [2021-11-09 09:18:57,388 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=233, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:18:57,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-09 09:18:57,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 226. [2021-11-09 09:18:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 223 states have (on average 1.3856502242152466) internal successors, (309), 225 states have internal predecessors, (309), 0 states have call successors, (0), 0 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 09:18:57,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 309 transitions. [2021-11-09 09:18:57,399 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 309 transitions. Word has length 33 [2021-11-09 09:18:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:57,400 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 309 transitions. [2021-11-09 09:18:57,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:57,400 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 309 transitions. [2021-11-09 09:18:57,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 09:18:57,401 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:57,401 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:57,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:57,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:57,614 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:57,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:57,615 INFO L85 PathProgramCache]: Analyzing trace with hash -195397689, now seen corresponding path program 4 times [2021-11-09 09:18:57,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:57,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742478847] [2021-11-09 09:18:57,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:57,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:18:57,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:57,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742478847] [2021-11-09 09:18:57,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742478847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:57,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313550123] [2021-11-09 09:18:57,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:18:57,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:57,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:57,746 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:57,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:18:57,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:18:57,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:18:57,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:18:57,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:18:57,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313550123] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:57,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:18:57,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-09 09:18:57,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125487843] [2021-11-09 09:18:57,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:18:57,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:57,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:18:57,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:18:57,989 INFO L87 Difference]: Start difference. First operand 226 states and 309 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:58,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:58,162 INFO L93 Difference]: Finished difference Result 513 states and 683 transitions. [2021-11-09 09:18:58,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:18:58,163 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 09:18:58,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:58,165 INFO L225 Difference]: With dead ends: 513 [2021-11-09 09:18:58,165 INFO L226 Difference]: Without dead ends: 306 [2021-11-09 09:18:58,166 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 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 09:18:58,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-09 09:18:58,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 250. [2021-11-09 09:18:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 247 states have (on average 1.388663967611336) internal successors, (343), 249 states have internal predecessors, (343), 0 states have call successors, (0), 0 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 09:18:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 343 transitions. [2021-11-09 09:18:58,176 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 343 transitions. Word has length 38 [2021-11-09 09:18:58,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:58,176 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 343 transitions. [2021-11-09 09:18:58,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:58,177 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 343 transitions. [2021-11-09 09:18:58,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 09:18:58,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:58,180 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:58,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:58,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:58,394 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:58,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:58,395 INFO L85 PathProgramCache]: Analyzing trace with hash -607913143, now seen corresponding path program 5 times [2021-11-09 09:18:58,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:58,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724906349] [2021-11-09 09:18:58,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:58,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:18:58,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:58,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724906349] [2021-11-09 09:18:58,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724906349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:58,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961673934] [2021-11-09 09:18:58,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:18:58,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:58,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:58,534 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:58,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:18:58,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-09 09:18:58,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:18:58,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:18:58,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:18:58,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961673934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:58,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:18:58,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-09 09:18:58,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840949501] [2021-11-09 09:18:58,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:18:58,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:58,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:18:58,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:18:58,830 INFO L87 Difference]: Start difference. First operand 250 states and 343 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:59,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:59,059 INFO L93 Difference]: Finished difference Result 563 states and 751 transitions. [2021-11-09 09:18:59,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:18:59,060 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-09 09:18:59,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:59,062 INFO L225 Difference]: With dead ends: 563 [2021-11-09 09:18:59,062 INFO L226 Difference]: Without dead ends: 334 [2021-11-09 09:18:59,063 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:18:59,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-09 09:18:59,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 274. [2021-11-09 09:18:59,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 271 states have (on average 1.3911439114391144) internal successors, (377), 273 states have internal predecessors, (377), 0 states have call successors, (0), 0 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 09:18:59,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 377 transitions. [2021-11-09 09:18:59,076 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 377 transitions. Word has length 40 [2021-11-09 09:18:59,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:59,076 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 377 transitions. [2021-11-09 09:18:59,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:59,077 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 377 transitions. [2021-11-09 09:18:59,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 09:18:59,079 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:59,079 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:59,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:59,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 09:18:59,305 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:59,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:59,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1898273205, now seen corresponding path program 6 times [2021-11-09 09:18:59,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:59,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698286812] [2021-11-09 09:18:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:59,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:18:59,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:59,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698286812] [2021-11-09 09:18:59,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698286812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:59,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694317695] [2021-11-09 09:18:59,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:18:59,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:18:59,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:59,448 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:18:59,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:18:59,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 09:18:59,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:18:59,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:18:59,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-09 09:18:59,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694317695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:18:59,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:18:59,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2021-11-09 09:18:59,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589473332] [2021-11-09 09:18:59,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:18:59,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:59,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:18:59,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:18:59,801 INFO L87 Difference]: Start difference. First operand 274 states and 377 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:00,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:00,151 INFO L93 Difference]: Finished difference Result 649 states and 875 transitions. [2021-11-09 09:19:00,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:19:00,152 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-09 09:19:00,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:00,154 INFO L225 Difference]: With dead ends: 649 [2021-11-09 09:19:00,154 INFO L226 Difference]: Without dead ends: 398 [2021-11-09 09:19:00,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:19:00,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-09 09:19:00,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 316. [2021-11-09 09:19:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 313 states have (on average 1.3865814696485623) internal successors, (434), 315 states have internal predecessors, (434), 0 states have call successors, (0), 0 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 09:19:00,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 434 transitions. [2021-11-09 09:19:00,168 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 434 transitions. Word has length 42 [2021-11-09 09:19:00,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:00,168 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 434 transitions. [2021-11-09 09:19:00,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:00,169 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 434 transitions. [2021-11-09 09:19:00,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:19:00,170 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:00,170 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:00,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:00,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:00,386 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:00,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:00,387 INFO L85 PathProgramCache]: Analyzing trace with hash -818929289, now seen corresponding path program 7 times [2021-11-09 09:19:00,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:00,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487188299] [2021-11-09 09:19:00,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:00,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 09:19:00,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:00,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487188299] [2021-11-09 09:19:00,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487188299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:00,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595991159] [2021-11-09 09:19:00,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:19:00,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:00,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:00,531 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:00,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:19:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:00,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 09:19:00,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 09:19:00,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595991159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:00,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:00,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-09 09:19:00,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567056427] [2021-11-09 09:19:00,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:19:00,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:00,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:19:00,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:19:00,837 INFO L87 Difference]: Start difference. First operand 316 states and 434 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 09:19:01,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:01,057 INFO L93 Difference]: Finished difference Result 699 states and 933 transitions. [2021-11-09 09:19:01,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:19:01,057 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 47 [2021-11-09 09:19:01,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:01,060 INFO L225 Difference]: With dead ends: 699 [2021-11-09 09:19:01,060 INFO L226 Difference]: Without dead ends: 408 [2021-11-09 09:19:01,061 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:19:01,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-11-09 09:19:01,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 340. [2021-11-09 09:19:01,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 337 states have (on average 1.3887240356083086) internal successors, (468), 339 states have internal predecessors, (468), 0 states have call successors, (0), 0 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 09:19:01,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 468 transitions. [2021-11-09 09:19:01,075 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 468 transitions. Word has length 47 [2021-11-09 09:19:01,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:01,075 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 468 transitions. [2021-11-09 09:19:01,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 09:19:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 468 transitions. [2021-11-09 09:19:01,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 09:19:01,076 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:01,076 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:01,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:01,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 09:19:01,302 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:01,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:01,303 INFO L85 PathProgramCache]: Analyzing trace with hash -803901387, now seen corresponding path program 8 times [2021-11-09 09:19:01,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:01,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616242674] [2021-11-09 09:19:01,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:01,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 09:19:01,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:01,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616242674] [2021-11-09 09:19:01,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616242674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:01,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370193403] [2021-11-09 09:19:01,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:19:01,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:01,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:01,446 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:01,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:19:01,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:19:01,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:01,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:19:01,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 09:19:01,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370193403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:01,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:01,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-09 09:19:01,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909842931] [2021-11-09 09:19:01,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:19:01,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:01,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:19:01,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:19:01,735 INFO L87 Difference]: Start difference. First operand 340 states and 468 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:01,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:01,997 INFO L93 Difference]: Finished difference Result 749 states and 1001 transitions. [2021-11-09 09:19:01,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:19:01,997 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-09 09:19:01,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:02,000 INFO L225 Difference]: With dead ends: 749 [2021-11-09 09:19:02,000 INFO L226 Difference]: Without dead ends: 436 [2021-11-09 09:19:02,001 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 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 09:19:02,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-11-09 09:19:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 364. [2021-11-09 09:19:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 361 states have (on average 1.3905817174515236) internal successors, (502), 363 states have internal predecessors, (502), 0 states have call successors, (0), 0 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 09:19:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 502 transitions. [2021-11-09 09:19:02,016 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 502 transitions. Word has length 49 [2021-11-09 09:19:02,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:02,017 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 502 transitions. [2021-11-09 09:19:02,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 502 transitions. [2021-11-09 09:19:02,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 09:19:02,018 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:02,018 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:02,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:02,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:19:02,234 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:02,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:02,235 INFO L85 PathProgramCache]: Analyzing trace with hash 753010547, now seen corresponding path program 9 times [2021-11-09 09:19:02,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:02,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269439534] [2021-11-09 09:19:02,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:02,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 09:19:02,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:02,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269439534] [2021-11-09 09:19:02,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269439534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:02,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923082208] [2021-11-09 09:19:02,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:19:02,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:02,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:02,392 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:02,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:19:02,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 09:19:02,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:02,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:19:02,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-09 09:19:02,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923082208] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:02,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:02,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2021-11-09 09:19:02,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741595236] [2021-11-09 09:19:02,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:19:02,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:02,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:19:02,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:19:02,753 INFO L87 Difference]: Start difference. First operand 364 states and 502 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 09:19:03,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:03,223 INFO L93 Difference]: Finished difference Result 845 states and 1141 transitions. [2021-11-09 09:19:03,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 09:19:03,224 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 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 51 [2021-11-09 09:19:03,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:03,227 INFO L225 Difference]: With dead ends: 845 [2021-11-09 09:19:03,227 INFO L226 Difference]: Without dead ends: 510 [2021-11-09 09:19:03,228 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=506, Invalid=826, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:19:03,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-09 09:19:03,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 412. [2021-11-09 09:19:03,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 409 states have (on average 1.3863080684596576) internal successors, (567), 411 states have internal predecessors, (567), 0 states have call successors, (0), 0 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 09:19:03,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 567 transitions. [2021-11-09 09:19:03,244 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 567 transitions. Word has length 51 [2021-11-09 09:19:03,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:03,244 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 567 transitions. [2021-11-09 09:19:03,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 09:19:03,245 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 567 transitions. [2021-11-09 09:19:03,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 09:19:03,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:03,245 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:03,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:03,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:19:03,470 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:03,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:03,470 INFO L85 PathProgramCache]: Analyzing trace with hash 158574739, now seen corresponding path program 10 times [2021-11-09 09:19:03,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:03,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12960343] [2021-11-09 09:19:03,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:03,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-09 09:19:03,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:03,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12960343] [2021-11-09 09:19:03,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12960343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:03,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332354809] [2021-11-09 09:19:03,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:19:03,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:03,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:03,634 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:03,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 09:19:03,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:19:03,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:03,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:19:03,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-09 09:19:04,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332354809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:04,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:04,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-09 09:19:04,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533026948] [2021-11-09 09:19:04,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:19:04,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:04,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:19:04,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:19:04,012 INFO L87 Difference]: Start difference. First operand 412 states and 567 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:04,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:04,290 INFO L93 Difference]: Finished difference Result 897 states and 1199 transitions. [2021-11-09 09:19:04,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:19:04,291 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-09 09:19:04,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:04,294 INFO L225 Difference]: With dead ends: 897 [2021-11-09 09:19:04,294 INFO L226 Difference]: Without dead ends: 516 [2021-11-09 09:19:04,295 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 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 09:19:04,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-09 09:19:04,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 436. [2021-11-09 09:19:04,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 433 states have (on average 1.3879907621247114) internal successors, (601), 435 states have internal predecessors, (601), 0 states have call successors, (0), 0 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 09:19:04,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 601 transitions. [2021-11-09 09:19:04,312 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 601 transitions. Word has length 56 [2021-11-09 09:19:04,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:04,312 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 601 transitions. [2021-11-09 09:19:04,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:04,313 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 601 transitions. [2021-11-09 09:19:04,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 09:19:04,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:04,313 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:04,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:04,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:04,526 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:04,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:04,527 INFO L85 PathProgramCache]: Analyzing trace with hash -383250539, now seen corresponding path program 11 times [2021-11-09 09:19:04,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:04,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994359113] [2021-11-09 09:19:04,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:04,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-09 09:19:04,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:04,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994359113] [2021-11-09 09:19:04,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994359113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:04,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935444207] [2021-11-09 09:19:04,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:19:04,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:04,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:04,699 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:04,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 09:19:05,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-11-09 09:19:05,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:05,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:19:05,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:05,216 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-09 09:19:05,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935444207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:05,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:05,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-09 09:19:05,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641209385] [2021-11-09 09:19:05,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:19:05,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:05,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:19:05,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:19:05,221 INFO L87 Difference]: Start difference. First operand 436 states and 601 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 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 09:19:05,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:05,510 INFO L93 Difference]: Finished difference Result 947 states and 1267 transitions. [2021-11-09 09:19:05,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:19:05,511 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 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 58 [2021-11-09 09:19:05,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:05,514 INFO L225 Difference]: With dead ends: 947 [2021-11-09 09:19:05,514 INFO L226 Difference]: Without dead ends: 544 [2021-11-09 09:19:05,515 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:19:05,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-09 09:19:05,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 460. [2021-11-09 09:19:05,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 457 states have (on average 1.3894967177242887) internal successors, (635), 459 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 09:19:05,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 635 transitions. [2021-11-09 09:19:05,533 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 635 transitions. Word has length 58 [2021-11-09 09:19:05,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:05,533 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 635 transitions. [2021-11-09 09:19:05,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 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 09:19:05,534 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 635 transitions. [2021-11-09 09:19:05,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 09:19:05,534 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:05,535 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:05,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:05,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:05,752 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:05,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:05,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1386299881, now seen corresponding path program 12 times [2021-11-09 09:19:05,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:05,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957562684] [2021-11-09 09:19:05,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:05,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-09 09:19:05,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:05,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957562684] [2021-11-09 09:19:05,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957562684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:05,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444746220] [2021-11-09 09:19:05,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:19:05,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:05,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:05,956 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:05,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 09:19:06,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-09 09:19:06,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:06,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 09:19:06,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-09 09:19:06,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444746220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:06,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:06,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 26 [2021-11-09 09:19:06,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355167054] [2021-11-09 09:19:06,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:19:06,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:06,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:19:06,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:19:06,460 INFO L87 Difference]: Start difference. First operand 460 states and 635 transitions. Second operand has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 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 09:19:07,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:07,133 INFO L93 Difference]: Finished difference Result 1053 states and 1423 transitions. [2021-11-09 09:19:07,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 09:19:07,134 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 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 60 [2021-11-09 09:19:07,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:07,137 INFO L225 Difference]: With dead ends: 1053 [2021-11-09 09:19:07,137 INFO L226 Difference]: Without dead ends: 628 [2021-11-09 09:19:07,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=818, Invalid=1344, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 09:19:07,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-11-09 09:19:07,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 514. [2021-11-09 09:19:07,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 511 states have (on average 1.385518590998043) internal successors, (708), 513 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 09:19:07,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 708 transitions. [2021-11-09 09:19:07,177 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 708 transitions. Word has length 60 [2021-11-09 09:19:07,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:07,177 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 708 transitions. [2021-11-09 09:19:07,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 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 09:19:07,178 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 708 transitions. [2021-11-09 09:19:07,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:19:07,178 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:07,179 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:07,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:07,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 09:19:07,402 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:07,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:07,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1730964821, now seen corresponding path program 13 times [2021-11-09 09:19:07,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:07,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633057322] [2021-11-09 09:19:07,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:07,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-09 09:19:07,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:07,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633057322] [2021-11-09 09:19:07,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633057322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:07,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209328542] [2021-11-09 09:19:07,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:19:07,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:07,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:07,634 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:07,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 09:19:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:07,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:19:07,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-09 09:19:08,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209328542] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:08,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:08,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-09 09:19:08,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033621321] [2021-11-09 09:19:08,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:19:08,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:08,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:19:08,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:19:08,109 INFO L87 Difference]: Start difference. First operand 514 states and 708 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 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 09:19:08,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:08,446 INFO L93 Difference]: Finished difference Result 1107 states and 1481 transitions. [2021-11-09 09:19:08,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:19:08,447 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 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) Word has length 65 [2021-11-09 09:19:08,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:08,450 INFO L225 Difference]: With dead ends: 1107 [2021-11-09 09:19:08,450 INFO L226 Difference]: Without dead ends: 630 [2021-11-09 09:19:08,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:19:08,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-09 09:19:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 538. [2021-11-09 09:19:08,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 535 states have (on average 1.3869158878504673) internal successors, (742), 537 states have internal predecessors, (742), 0 states have call successors, (0), 0 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 09:19:08,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 742 transitions. [2021-11-09 09:19:08,471 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 742 transitions. Word has length 65 [2021-11-09 09:19:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:08,471 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 742 transitions. [2021-11-09 09:19:08,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 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 09:19:08,471 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 742 transitions. [2021-11-09 09:19:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 09:19:08,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:08,472 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:08,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:08,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:08,686 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:08,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:08,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1732907543, now seen corresponding path program 14 times [2021-11-09 09:19:08,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:08,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054269775] [2021-11-09 09:19:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:08,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-09 09:19:08,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:08,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054269775] [2021-11-09 09:19:08,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054269775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:08,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282314109] [2021-11-09 09:19:08,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:19:08,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:08,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:08,942 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:08,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 09:19:09,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:19:09,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:09,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:19:09,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-09 09:19:09,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282314109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:09,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:09,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-09 09:19:09,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848425552] [2021-11-09 09:19:09,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:19:09,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:09,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:19:09,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:19:09,354 INFO L87 Difference]: Start difference. First operand 538 states and 742 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 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 09:19:09,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:09,697 INFO L93 Difference]: Finished difference Result 1157 states and 1549 transitions. [2021-11-09 09:19:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:19:09,698 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 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 67 [2021-11-09 09:19:09,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:09,702 INFO L225 Difference]: With dead ends: 1157 [2021-11-09 09:19:09,702 INFO L226 Difference]: Without dead ends: 658 [2021-11-09 09:19:09,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:19:09,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-11-09 09:19:09,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 562. [2021-11-09 09:19:09,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 559 states have (on average 1.3881932021466905) internal successors, (776), 561 states have internal predecessors, (776), 0 states have call successors, (0), 0 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 09:19:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 776 transitions. [2021-11-09 09:19:09,730 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 776 transitions. Word has length 67 [2021-11-09 09:19:09,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:09,731 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 776 transitions. [2021-11-09 09:19:09,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 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 09:19:09,731 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 776 transitions. [2021-11-09 09:19:09,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 09:19:09,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:09,732 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:09,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:09,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:09,946 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:09,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:09,947 INFO L85 PathProgramCache]: Analyzing trace with hash 695103911, now seen corresponding path program 15 times [2021-11-09 09:19:09,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:09,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133204152] [2021-11-09 09:19:09,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:09,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-09 09:19:10,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:10,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133204152] [2021-11-09 09:19:10,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133204152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:10,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22634709] [2021-11-09 09:19:10,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:19:10,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:10,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:10,192 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:10,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 09:19:10,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 09:19:10,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:10,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 09:19:10,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-11-09 09:19:10,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22634709] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:10,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:10,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2021-11-09 09:19:10,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241720280] [2021-11-09 09:19:10,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 09:19:10,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:10,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 09:19:10,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=436, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:19:10,862 INFO L87 Difference]: Start difference. First operand 562 states and 776 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:11,679 INFO L93 Difference]: Finished difference Result 1208 states and 1618 transitions. [2021-11-09 09:19:11,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:19:11,679 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-09 09:19:11,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:11,683 INFO L225 Difference]: With dead ends: 1208 [2021-11-09 09:19:11,683 INFO L226 Difference]: Without dead ends: 687 [2021-11-09 09:19:11,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=998, Invalid=1452, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 09:19:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-11-09 09:19:11,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 586. [2021-11-09 09:19:11,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 583 states have (on average 1.3876500857632934) internal successors, (809), 585 states have internal predecessors, (809), 0 states have call successors, (0), 0 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 09:19:11,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 809 transitions. [2021-11-09 09:19:11,712 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 809 transitions. Word has length 69 [2021-11-09 09:19:11,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:11,712 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 809 transitions. [2021-11-09 09:19:11,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:11,712 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 809 transitions. [2021-11-09 09:19:11,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 09:19:11,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:11,713 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:11,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:11,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 09:19:11,935 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:11,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash 2065724195, now seen corresponding path program 1 times [2021-11-09 09:19:11,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:11,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241932883] [2021-11-09 09:19:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:11,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-09 09:19:12,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:12,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241932883] [2021-11-09 09:19:12,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241932883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:12,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694601804] [2021-11-09 09:19:12,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:12,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:12,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:12,189 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:12,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 09:19:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:12,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 09:19:12,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-09 09:19:12,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694601804] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:12,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:12,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-09 09:19:12,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592325021] [2021-11-09 09:19:12,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 09:19:12,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:12,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 09:19:12,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:19:12,662 INFO L87 Difference]: Start difference. First operand 586 states and 809 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:13,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:13,081 INFO L93 Difference]: Finished difference Result 1257 states and 1683 transitions. [2021-11-09 09:19:13,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:19:13,081 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-09 09:19:13,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:13,085 INFO L225 Difference]: With dead ends: 1257 [2021-11-09 09:19:13,085 INFO L226 Difference]: Without dead ends: 714 [2021-11-09 09:19:13,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 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 09:19:13,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-11-09 09:19:13,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 610. [2021-11-09 09:19:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 607 states have (on average 1.3887973640856672) internal successors, (843), 609 states have internal predecessors, (843), 0 states have call successors, (0), 0 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 09:19:13,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 843 transitions. [2021-11-09 09:19:13,111 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 843 transitions. Word has length 71 [2021-11-09 09:19:13,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:13,111 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 843 transitions. [2021-11-09 09:19:13,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:13,111 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 843 transitions. [2021-11-09 09:19:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-09 09:19:13,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:13,112 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:13,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:13,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 09:19:13,330 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:13,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:13,331 INFO L85 PathProgramCache]: Analyzing trace with hash 810870753, now seen corresponding path program 2 times [2021-11-09 09:19:13,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:13,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78230863] [2021-11-09 09:19:13,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:13,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-09 09:19:13,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:13,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78230863] [2021-11-09 09:19:13,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78230863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:13,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467281527] [2021-11-09 09:19:13,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:19:13,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:13,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:13,621 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:13,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 09:19:14,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:19:14,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:14,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 09:19:14,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-09 09:19:14,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467281527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:14,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:14,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-09 09:19:14,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95466855] [2021-11-09 09:19:14,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 09:19:14,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:14,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 09:19:14,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:19:14,260 INFO L87 Difference]: Start difference. First operand 610 states and 843 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 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 09:19:14,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:14,704 INFO L93 Difference]: Finished difference Result 1307 states and 1751 transitions. [2021-11-09 09:19:14,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:19:14,704 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 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 73 [2021-11-09 09:19:14,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:14,708 INFO L225 Difference]: With dead ends: 1307 [2021-11-09 09:19:14,709 INFO L226 Difference]: Without dead ends: 742 [2021-11-09 09:19:14,710 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:19:14,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-11-09 09:19:14,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 634. [2021-11-09 09:19:14,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 631 states have (on average 1.3898573692551506) internal successors, (877), 633 states have internal predecessors, (877), 0 states have call successors, (0), 0 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 09:19:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 877 transitions. [2021-11-09 09:19:14,734 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 877 transitions. Word has length 73 [2021-11-09 09:19:14,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:14,734 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 877 transitions. [2021-11-09 09:19:14,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 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 09:19:14,735 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 877 transitions. [2021-11-09 09:19:14,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 09:19:14,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:14,736 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:14,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:14,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 09:19:14,962 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:14,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:14,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1782523167, now seen corresponding path program 3 times [2021-11-09 09:19:14,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:14,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683220881] [2021-11-09 09:19:14,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:14,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-09 09:19:15,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:15,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683220881] [2021-11-09 09:19:15,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683220881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:15,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522998526] [2021-11-09 09:19:15,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:19:15,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:15,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:15,286 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:15,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 09:19:15,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 09:19:15,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:15,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:19:15,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-09 09:19:15,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522998526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:15,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:15,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10] total 33 [2021-11-09 09:19:15,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892676188] [2021-11-09 09:19:15,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 09:19:15,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:15,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 09:19:15,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:19:15,980 INFO L87 Difference]: Start difference. First operand 634 states and 877 transitions. Second operand has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 33 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 09:19:16,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:16,971 INFO L93 Difference]: Finished difference Result 1423 states and 1923 transitions. [2021-11-09 09:19:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-09 09:19:16,971 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 33 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 75 [2021-11-09 09:19:16,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:16,975 INFO L225 Difference]: With dead ends: 1423 [2021-11-09 09:19:16,975 INFO L226 Difference]: Without dead ends: 836 [2021-11-09 09:19:16,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1403, Invalid=2257, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 09:19:16,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-11-09 09:19:17,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 694. [2021-11-09 09:19:17,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 691 states have (on average 1.3863965267727931) internal successors, (958), 693 states have internal predecessors, (958), 0 states have call successors, (0), 0 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 09:19:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 958 transitions. [2021-11-09 09:19:17,004 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 958 transitions. Word has length 75 [2021-11-09 09:19:17,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:17,004 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 958 transitions. [2021-11-09 09:19:17,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 33 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 09:19:17,005 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 958 transitions. [2021-11-09 09:19:17,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 09:19:17,006 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:17,006 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:17,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:17,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 09:19:17,222 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:17,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:17,223 INFO L85 PathProgramCache]: Analyzing trace with hash 300791143, now seen corresponding path program 4 times [2021-11-09 09:19:17,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:17,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858773765] [2021-11-09 09:19:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:17,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 09:19:17,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:17,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858773765] [2021-11-09 09:19:17,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858773765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:17,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191950141] [2021-11-09 09:19:17,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:19:17,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:17,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:17,546 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:17,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 09:19:18,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:19:18,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:18,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 09:19:18,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 09:19:18,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191950141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:18,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:18,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-09 09:19:18,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965137567] [2021-11-09 09:19:18,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 09:19:18,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:18,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 09:19:18,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:19:18,249 INFO L87 Difference]: Start difference. First operand 694 states and 958 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:18,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:18,750 INFO L93 Difference]: Finished difference Result 1479 states and 1981 transitions. [2021-11-09 09:19:18,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 09:19:18,750 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 09:19:18,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:18,755 INFO L225 Difference]: With dead ends: 1479 [2021-11-09 09:19:18,755 INFO L226 Difference]: Without dead ends: 834 [2021-11-09 09:19:18,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:19:18,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-11-09 09:19:18,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 718. [2021-11-09 09:19:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 715 states have (on average 1.3874125874125873) internal successors, (992), 717 states have internal predecessors, (992), 0 states have call successors, (0), 0 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 09:19:18,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 992 transitions. [2021-11-09 09:19:18,782 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 992 transitions. Word has length 80 [2021-11-09 09:19:18,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:18,783 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 992 transitions. [2021-11-09 09:19:18,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:18,783 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 992 transitions. [2021-11-09 09:19:18,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 09:19:18,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:18,784 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:18,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:18,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:18,998 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:18,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:18,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1929529751, now seen corresponding path program 5 times [2021-11-09 09:19:18,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:18,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93080553] [2021-11-09 09:19:18,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:18,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 09:19:19,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:19,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93080553] [2021-11-09 09:19:19,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93080553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:19,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374306314] [2021-11-09 09:19:19,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:19:19,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:19,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:19,366 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:19,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 09:19:20,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-11-09 09:19:20,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:20,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 09:19:20,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 09:19:20,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374306314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:20,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:20,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-09 09:19:20,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738395169] [2021-11-09 09:19:20,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 09:19:20,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:20,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 09:19:20,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:19:20,564 INFO L87 Difference]: Start difference. First operand 718 states and 992 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 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 09:19:21,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:21,007 INFO L93 Difference]: Finished difference Result 1529 states and 2049 transitions. [2021-11-09 09:19:21,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:19:21,008 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 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 82 [2021-11-09 09:19:21,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:21,013 INFO L225 Difference]: With dead ends: 1529 [2021-11-09 09:19:21,013 INFO L226 Difference]: Without dead ends: 862 [2021-11-09 09:19:21,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:19:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-11-09 09:19:21,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 742. [2021-11-09 09:19:21,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 739 states have (on average 1.388362652232747) internal successors, (1026), 741 states have internal predecessors, (1026), 0 states have call successors, (0), 0 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 09:19:21,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1026 transitions. [2021-11-09 09:19:21,043 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1026 transitions. Word has length 82 [2021-11-09 09:19:21,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:21,043 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 1026 transitions. [2021-11-09 09:19:21,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 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 09:19:21,044 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1026 transitions. [2021-11-09 09:19:21,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-09 09:19:21,045 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:21,045 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:21,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:21,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 09:19:21,266 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:21,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:21,267 INFO L85 PathProgramCache]: Analyzing trace with hash -2079228181, now seen corresponding path program 6 times [2021-11-09 09:19:21,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:21,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683168272] [2021-11-09 09:19:21,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:21,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 09:19:21,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:21,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683168272] [2021-11-09 09:19:21,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683168272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:21,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3929423] [2021-11-09 09:19:21,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:19:21,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:21,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:21,630 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:21,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 09:19:22,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-09 09:19:22,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:22,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:19:22,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-11-09 09:19:22,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3929423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:22,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:22,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11] total 37 [2021-11-09 09:19:22,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555826339] [2021-11-09 09:19:22,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 09:19:22,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:22,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 09:19:22,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:19:22,723 INFO L87 Difference]: Start difference. First operand 742 states and 1026 transitions. Second operand has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 09:19:23,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:23,800 INFO L93 Difference]: Finished difference Result 1655 states and 2237 transitions. [2021-11-09 09:19:23,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-09 09:19:23,800 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 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 09:19:23,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:23,808 INFO L225 Difference]: With dead ends: 1655 [2021-11-09 09:19:23,808 INFO L226 Difference]: Without dead ends: 966 [2021-11-09 09:19:23,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2006, Invalid=3250, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 09:19:23,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-11-09 09:19:23,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 808. [2021-11-09 09:19:23,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 805 states have (on average 1.3850931677018634) internal successors, (1115), 807 states have internal predecessors, (1115), 0 states have call successors, (0), 0 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 09:19:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1115 transitions. [2021-11-09 09:19:23,841 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1115 transitions. Word has length 84 [2021-11-09 09:19:23,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:23,841 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 1115 transitions. [2021-11-09 09:19:23,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 09:19:23,842 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1115 transitions. [2021-11-09 09:19:23,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-09 09:19:23,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:23,843 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:23,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:24,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:24,070 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:24,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:24,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1312008361, now seen corresponding path program 7 times [2021-11-09 09:19:24,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:24,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909624595] [2021-11-09 09:19:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:24,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-09 09:19:24,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:24,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909624595] [2021-11-09 09:19:24,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909624595] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:24,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198577145] [2021-11-09 09:19:24,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:19:24,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:24,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:24,425 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:24,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 09:19:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:24,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 09:19:24,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-09 09:19:25,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198577145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:25,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:25,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-09 09:19:25,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855030515] [2021-11-09 09:19:25,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 09:19:25,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:25,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 09:19:25,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:19:25,115 INFO L87 Difference]: Start difference. First operand 808 states and 1115 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:25,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:25,560 INFO L93 Difference]: Finished difference Result 1713 states and 2295 transitions. [2021-11-09 09:19:25,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 09:19:25,560 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-09 09:19:25,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:25,565 INFO L225 Difference]: With dead ends: 1713 [2021-11-09 09:19:25,565 INFO L226 Difference]: Without dead ends: 960 [2021-11-09 09:19:25,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 89 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 09:19:25,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2021-11-09 09:19:25,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 832. [2021-11-09 09:19:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 829 states have (on average 1.3860072376357058) internal successors, (1149), 831 states have internal predecessors, (1149), 0 states have call successors, (0), 0 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 09:19:25,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1149 transitions. [2021-11-09 09:19:25,598 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1149 transitions. Word has length 89 [2021-11-09 09:19:25,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:25,599 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 1149 transitions. [2021-11-09 09:19:25,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:25,599 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1149 transitions. [2021-11-09 09:19:25,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-09 09:19:25,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:25,600 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:25,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:25,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-09 09:19:25,826 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:25,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:25,827 INFO L85 PathProgramCache]: Analyzing trace with hash -624928619, now seen corresponding path program 8 times [2021-11-09 09:19:25,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:25,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817684292] [2021-11-09 09:19:25,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:25,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-09 09:19:26,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:26,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817684292] [2021-11-09 09:19:26,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817684292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:26,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709080019] [2021-11-09 09:19:26,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:19:26,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:26,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:26,237 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:26,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 09:19:26,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:19:26,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:26,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 09:19:26,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-09 09:19:26,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709080019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:26,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:26,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-09 09:19:26,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205424008] [2021-11-09 09:19:26,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 09:19:26,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:26,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 09:19:26,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-09 09:19:26,901 INFO L87 Difference]: Start difference. First operand 832 states and 1149 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 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 09:19:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:27,383 INFO L93 Difference]: Finished difference Result 1763 states and 2363 transitions. [2021-11-09 09:19:27,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 09:19:27,383 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 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 91 [2021-11-09 09:19:27,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:27,388 INFO L225 Difference]: With dead ends: 1763 [2021-11-09 09:19:27,388 INFO L226 Difference]: Without dead ends: 988 [2021-11-09 09:19:27,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-09 09:19:27,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2021-11-09 09:19:27,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 856. [2021-11-09 09:19:27,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 853 states have (on average 1.3868698710433762) internal successors, (1183), 855 states have internal predecessors, (1183), 0 states have call successors, (0), 0 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 09:19:27,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1183 transitions. [2021-11-09 09:19:27,422 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1183 transitions. Word has length 91 [2021-11-09 09:19:27,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:27,422 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 1183 transitions. [2021-11-09 09:19:27,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 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 09:19:27,423 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1183 transitions. [2021-11-09 09:19:27,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-09 09:19:27,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:27,424 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:27,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:27,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:27,638 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:27,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:27,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1766260141, now seen corresponding path program 9 times [2021-11-09 09:19:27,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:27,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267800978] [2021-11-09 09:19:27,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:27,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-09 09:19:28,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:28,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267800978] [2021-11-09 09:19:28,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267800978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:28,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225255151] [2021-11-09 09:19:28,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:19:28,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:28,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:28,022 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:28,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 09:19:28,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-09 09:19:28,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:28,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:19:28,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-11-09 09:19:28,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225255151] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:28,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:28,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2021-11-09 09:19:28,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208654533] [2021-11-09 09:19:28,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 09:19:28,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:28,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 09:19:28,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 09:19:28,862 INFO L87 Difference]: Start difference. First operand 856 states and 1183 transitions. Second operand has 41 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 41 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 09:19:30,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:30,108 INFO L93 Difference]: Finished difference Result 1899 states and 2567 transitions. [2021-11-09 09:19:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-09 09:19:30,109 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 41 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 93 [2021-11-09 09:19:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:30,113 INFO L225 Difference]: With dead ends: 1899 [2021-11-09 09:19:30,113 INFO L226 Difference]: Without dead ends: 1102 [2021-11-09 09:19:30,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2779, Invalid=4531, Unknown=0, NotChecked=0, Total=7310 [2021-11-09 09:19:30,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-11-09 09:19:30,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 928. [2021-11-09 09:19:30,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 925 states have (on average 1.3837837837837839) internal successors, (1280), 927 states have internal predecessors, (1280), 0 states have call successors, (0), 0 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 09:19:30,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1280 transitions. [2021-11-09 09:19:30,152 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1280 transitions. Word has length 93 [2021-11-09 09:19:30,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:30,153 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 1280 transitions. [2021-11-09 09:19:30,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 41 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 09:19:30,153 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1280 transitions. [2021-11-09 09:19:30,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 09:19:30,154 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:30,154 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:30,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:30,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-09 09:19:30,382 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:30,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:30,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2015117517, now seen corresponding path program 10 times [2021-11-09 09:19:30,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:30,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802741108] [2021-11-09 09:19:30,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:30,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-09 09:19:30,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:30,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802741108] [2021-11-09 09:19:30,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802741108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:30,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710696516] [2021-11-09 09:19:30,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:19:30,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:30,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:30,847 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:30,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 09:19:31,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:19:31,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:31,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 09:19:31,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-09 09:19:31,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710696516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:31,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:31,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-11-09 09:19:31,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296310026] [2021-11-09 09:19:31,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 09:19:31,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:31,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 09:19:31,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:19:31,630 INFO L87 Difference]: Start difference. First operand 928 states and 1280 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:32,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:32,135 INFO L93 Difference]: Finished difference Result 1959 states and 2625 transitions. [2021-11-09 09:19:32,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 09:19:32,135 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-09 09:19:32,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:32,139 INFO L225 Difference]: With dead ends: 1959 [2021-11-09 09:19:32,139 INFO L226 Difference]: Without dead ends: 1092 [2021-11-09 09:19:32,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:19:32,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-11-09 09:19:32,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 952. [2021-11-09 09:19:32,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 949 states have (on average 1.3846153846153846) internal successors, (1314), 951 states have internal predecessors, (1314), 0 states have call successors, (0), 0 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 09:19:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1314 transitions. [2021-11-09 09:19:32,177 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1314 transitions. Word has length 98 [2021-11-09 09:19:32,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:32,177 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 1314 transitions. [2021-11-09 09:19:32,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:32,178 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1314 transitions. [2021-11-09 09:19:32,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-09 09:19:32,179 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:32,179 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:32,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:32,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 09:19:32,404 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:32,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:32,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1532345419, now seen corresponding path program 11 times [2021-11-09 09:19:32,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:32,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073601384] [2021-11-09 09:19:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:32,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-09 09:19:32,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:32,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073601384] [2021-11-09 09:19:32,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073601384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:32,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56460169] [2021-11-09 09:19:32,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:19:32,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:32,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:32,899 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:32,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 09:19:36,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-11-09 09:19:36,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:36,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 09:19:36,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-09 09:19:36,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56460169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:36,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:36,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-11-09 09:19:36,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752745797] [2021-11-09 09:19:36,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 09:19:36,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:36,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 09:19:36,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 09:19:36,963 INFO L87 Difference]: Start difference. First operand 952 states and 1314 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 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 09:19:37,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:37,474 INFO L93 Difference]: Finished difference Result 2009 states and 2693 transitions. [2021-11-09 09:19:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 09:19:37,474 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 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 100 [2021-11-09 09:19:37,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:37,484 INFO L225 Difference]: With dead ends: 2009 [2021-11-09 09:19:37,484 INFO L226 Difference]: Without dead ends: 1120 [2021-11-09 09:19:37,485 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 09:19:37,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-11-09 09:19:37,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 976. [2021-11-09 09:19:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 973 states have (on average 1.3854059609455294) internal successors, (1348), 975 states have internal predecessors, (1348), 0 states have call successors, (0), 0 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 09:19:37,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1348 transitions. [2021-11-09 09:19:37,530 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1348 transitions. Word has length 100 [2021-11-09 09:19:37,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:37,530 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 1348 transitions. [2021-11-09 09:19:37,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 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 09:19:37,531 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1348 transitions. [2021-11-09 09:19:37,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-09 09:19:37,532 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:37,532 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:37,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-09 09:19:37,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:37,746 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:37,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:37,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1444827209, now seen corresponding path program 12 times [2021-11-09 09:19:37,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:37,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198737294] [2021-11-09 09:19:37,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:37,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:38,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-09 09:19:38,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:38,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198737294] [2021-11-09 09:19:38,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198737294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:38,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550449399] [2021-11-09 09:19:38,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:19:38,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:38,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:38,203 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:38,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 09:19:39,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-09 09:19:39,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:39,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:19:39,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2021-11-09 09:19:39,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550449399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:39,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:39,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 13] total 45 [2021-11-09 09:19:39,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770134817] [2021-11-09 09:19:39,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-09 09:19:39,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:39,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-09 09:19:39,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=1320, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 09:19:39,848 INFO L87 Difference]: Start difference. First operand 976 states and 1348 transitions. Second operand has 45 states, 45 states have (on average 2.511111111111111) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 09:19:41,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:41,515 INFO L93 Difference]: Finished difference Result 2155 states and 2913 transitions. [2021-11-09 09:19:41,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-09 09:19:41,516 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.511111111111111) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 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 102 [2021-11-09 09:19:41,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:41,520 INFO L225 Difference]: With dead ends: 2155 [2021-11-09 09:19:41,520 INFO L226 Difference]: Without dead ends: 1244 [2021-11-09 09:19:41,523 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3750, Invalid=6150, Unknown=0, NotChecked=0, Total=9900 [2021-11-09 09:19:41,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-11-09 09:19:41,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1054. [2021-11-09 09:19:41,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1051 states have (on average 1.3824928639391056) internal successors, (1453), 1053 states have internal predecessors, (1453), 0 states have call successors, (0), 0 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 09:19:41,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1453 transitions. [2021-11-09 09:19:41,563 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1453 transitions. Word has length 102 [2021-11-09 09:19:41,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:41,564 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 1453 transitions. [2021-11-09 09:19:41,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.511111111111111) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 09:19:41,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1453 transitions. [2021-11-09 09:19:41,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-09 09:19:41,565 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:41,566 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:41,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:41,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 09:19:41,782 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:41,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:41,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1614901131, now seen corresponding path program 13 times [2021-11-09 09:19:41,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:41,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856213454] [2021-11-09 09:19:41,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:41,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-09 09:19:42,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:42,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856213454] [2021-11-09 09:19:42,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856213454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:42,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621709462] [2021-11-09 09:19:42,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:19:42,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:42,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:42,281 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:42,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 09:19:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:42,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 09:19:42,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-09 09:19:43,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621709462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:43,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:43,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-09 09:19:43,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608580819] [2021-11-09 09:19:43,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 09:19:43,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:43,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 09:19:43,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 09:19:43,142 INFO L87 Difference]: Start difference. First operand 1054 states and 1453 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 36 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:43,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:43,758 INFO L93 Difference]: Finished difference Result 2217 states and 2971 transitions. [2021-11-09 09:19:43,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 09:19:43,759 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 36 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-09 09:19:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:43,763 INFO L225 Difference]: With dead ends: 2217 [2021-11-09 09:19:43,763 INFO L226 Difference]: Without dead ends: 1230 [2021-11-09 09:19:43,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 09:19:43,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-11-09 09:19:43,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1078. [2021-11-09 09:19:43,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1075 states have (on average 1.3832558139534883) internal successors, (1487), 1077 states have internal predecessors, (1487), 0 states have call successors, (0), 0 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 09:19:43,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1487 transitions. [2021-11-09 09:19:43,803 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1487 transitions. Word has length 107 [2021-11-09 09:19:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:43,804 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 1487 transitions. [2021-11-09 09:19:43,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 36 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:43,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1487 transitions. [2021-11-09 09:19:43,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-09 09:19:43,805 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:43,805 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:43,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:44,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:44,018 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:44,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:44,019 INFO L85 PathProgramCache]: Analyzing trace with hash 769318217, now seen corresponding path program 14 times [2021-11-09 09:19:44,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:44,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514327517] [2021-11-09 09:19:44,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:44,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1234 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-09 09:19:44,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:44,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514327517] [2021-11-09 09:19:44,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514327517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:44,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23948496] [2021-11-09 09:19:44,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:19:44,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:44,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:44,557 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:44,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 09:19:45,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:19:45,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:45,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 09:19:45,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1234 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-09 09:19:45,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23948496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:45,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:45,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-11-09 09:19:45,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920580198] [2021-11-09 09:19:45,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 09:19:45,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:45,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 09:19:45,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:19:45,514 INFO L87 Difference]: Start difference. First operand 1078 states and 1487 transitions. Second operand has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 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 09:19:46,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:46,215 INFO L93 Difference]: Finished difference Result 2267 states and 3039 transitions. [2021-11-09 09:19:46,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 09:19:46,215 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 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 109 [2021-11-09 09:19:46,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:46,219 INFO L225 Difference]: With dead ends: 2267 [2021-11-09 09:19:46,220 INFO L226 Difference]: Without dead ends: 1258 [2021-11-09 09:19:46,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:19:46,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-11-09 09:19:46,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1102. [2021-11-09 09:19:46,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1099 states have (on average 1.3839854413102821) internal successors, (1521), 1101 states have internal predecessors, (1521), 0 states have call successors, (0), 0 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 09:19:46,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1521 transitions. [2021-11-09 09:19:46,246 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1521 transitions. Word has length 109 [2021-11-09 09:19:46,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:46,246 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1521 transitions. [2021-11-09 09:19:46,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 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 09:19:46,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1521 transitions. [2021-11-09 09:19:46,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-09 09:19:46,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:46,248 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:46,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-09 09:19:46,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 09:19:46,461 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:46,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:46,462 INFO L85 PathProgramCache]: Analyzing trace with hash -87043193, now seen corresponding path program 15 times [2021-11-09 09:19:46,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:46,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210085657] [2021-11-09 09:19:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:46,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-09 09:19:46,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:46,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210085657] [2021-11-09 09:19:46,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210085657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:46,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358013331] [2021-11-09 09:19:46,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:19:46,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:46,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:46,989 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:46,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 09:19:47,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-09 09:19:47,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:47,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 09:19:47,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-11-09 09:19:48,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358013331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:48,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:48,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14] total 49 [2021-11-09 09:19:48,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44320077] [2021-11-09 09:19:48,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 09:19:48,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:48,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 09:19:48,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=1572, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 09:19:48,159 INFO L87 Difference]: Start difference. First operand 1102 states and 1521 transitions. Second operand has 49 states, 49 states have (on average 2.489795918367347) internal successors, (122), 49 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 09:19:50,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:50,362 INFO L93 Difference]: Finished difference Result 2423 states and 3275 transitions. [2021-11-09 09:19:50,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-09 09:19:50,363 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.489795918367347) internal successors, (122), 49 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 111 [2021-11-09 09:19:50,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:50,369 INFO L225 Difference]: With dead ends: 2423 [2021-11-09 09:19:50,369 INFO L226 Difference]: Without dead ends: 1392 [2021-11-09 09:19:50,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4949, Invalid=8161, Unknown=0, NotChecked=0, Total=13110 [2021-11-09 09:19:50,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-11-09 09:19:50,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1186. [2021-11-09 09:19:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1183 states have (on average 1.3812341504649197) internal successors, (1634), 1185 states have internal predecessors, (1634), 0 states have call successors, (0), 0 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 09:19:50,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1634 transitions. [2021-11-09 09:19:50,411 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1634 transitions. Word has length 111 [2021-11-09 09:19:50,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:50,412 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 1634 transitions. [2021-11-09 09:19:50,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.489795918367347) internal successors, (122), 49 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 09:19:50,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1634 transitions. [2021-11-09 09:19:50,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-09 09:19:50,414 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:50,414 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:50,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:50,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 09:19:50,630 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:50,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:50,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1167690497, now seen corresponding path program 16 times [2021-11-09 09:19:50,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:50,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535335905] [2021-11-09 09:19:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:50,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-09 09:19:51,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:51,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535335905] [2021-11-09 09:19:51,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535335905] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:51,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467968503] [2021-11-09 09:19:51,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:19:51,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:51,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:51,321 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:51,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 09:19:52,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:19:52,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:52,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 09:19:52,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-09 09:19:52,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467968503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:52,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:52,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-11-09 09:19:52,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037179144] [2021-11-09 09:19:52,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 09:19:52,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:52,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 09:19:52,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 09:19:52,369 INFO L87 Difference]: Start difference. First operand 1186 states and 1634 transitions. Second operand has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 09:19:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:53,131 INFO L93 Difference]: Finished difference Result 2487 states and 3333 transitions. [2021-11-09 09:19:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 09:19:53,132 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 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 116 [2021-11-09 09:19:53,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:53,138 INFO L225 Difference]: With dead ends: 2487 [2021-11-09 09:19:53,138 INFO L226 Difference]: Without dead ends: 1374 [2021-11-09 09:19:53,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 09:19:53,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2021-11-09 09:19:53,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1210. [2021-11-09 09:19:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1207 states have (on average 1.3819386909693454) internal successors, (1668), 1209 states have internal predecessors, (1668), 0 states have call successors, (0), 0 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 09:19:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1668 transitions. [2021-11-09 09:19:53,174 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1668 transitions. Word has length 116 [2021-11-09 09:19:53,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:53,174 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 1668 transitions. [2021-11-09 09:19:53,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 09:19:53,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1668 transitions. [2021-11-09 09:19:53,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-09 09:19:53,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:53,175 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:53,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:53,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 09:19:53,386 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:53,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:53,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1130783487, now seen corresponding path program 17 times [2021-11-09 09:19:53,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:53,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887988372] [2021-11-09 09:19:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:53,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1472 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-09 09:19:54,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:54,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887988372] [2021-11-09 09:19:54,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887988372] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:54,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036765021] [2021-11-09 09:19:54,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:19:54,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:54,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:54,035 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:54,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 09:19:57,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-11-09 09:19:57,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:57,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 09:19:57,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1472 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-09 09:19:57,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036765021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:57,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:57,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-11-09 09:19:57,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440787147] [2021-11-09 09:19:57,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 09:19:57,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:57,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 09:19:57,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 09:19:57,957 INFO L87 Difference]: Start difference. First operand 1210 states and 1668 transitions. Second operand has 40 states, 40 states have (on average 2.3) internal successors, (92), 40 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 09:19:58,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:58,694 INFO L93 Difference]: Finished difference Result 2537 states and 3401 transitions. [2021-11-09 09:19:58,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 09:19:58,695 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 40 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 118 [2021-11-09 09:19:58,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:58,702 INFO L225 Difference]: With dead ends: 2537 [2021-11-09 09:19:58,702 INFO L226 Difference]: Without dead ends: 1402 [2021-11-09 09:19:58,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 09:19:58,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-11-09 09:19:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1234. [2021-11-09 09:19:58,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1231 states have (on average 1.3826157595450852) internal successors, (1702), 1233 states have internal predecessors, (1702), 0 states have call successors, (0), 0 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 09:19:58,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1702 transitions. [2021-11-09 09:19:58,752 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1702 transitions. Word has length 118 [2021-11-09 09:19:58,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:58,753 INFO L470 AbstractCegarLoop]: Abstraction has 1234 states and 1702 transitions. [2021-11-09 09:19:58,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 40 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 09:19:58,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1702 transitions. [2021-11-09 09:19:58,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-09 09:19:58,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:58,754 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:58,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:58,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:58,966 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:58,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:58,967 INFO L85 PathProgramCache]: Analyzing trace with hash -22885245, now seen corresponding path program 18 times [2021-11-09 09:19:58,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:58,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120266924] [2021-11-09 09:19:58,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:58,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-09 09:19:59,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:59,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120266924] [2021-11-09 09:19:59,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120266924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:59,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993437847] [2021-11-09 09:19:59,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:19:59,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:59,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:59,653 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:59,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 09:20:01,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-11-09 09:20:01,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:20:01,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:20:01,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-11-09 09:20:01,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993437847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:01,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:20:01,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 15] total 53 [2021-11-09 09:20:01,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044474570] [2021-11-09 09:20:01,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-09 09:20:01,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:01,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-09 09:20:01,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=910, Invalid=1846, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 09:20:01,512 INFO L87 Difference]: Start difference. First operand 1234 states and 1702 transitions. Second operand has 53 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 53 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:04,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:04,410 INFO L93 Difference]: Finished difference Result 2703 states and 3653 transitions. [2021-11-09 09:20:04,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-11-09 09:20:04,411 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 53 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-09 09:20:04,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:04,418 INFO L225 Difference]: With dead ends: 2703 [2021-11-09 09:20:04,419 INFO L226 Difference]: Without dead ends: 1546 [2021-11-09 09:20:04,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3598 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=6408, Invalid=10622, Unknown=0, NotChecked=0, Total=17030 [2021-11-09 09:20:04,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-11-09 09:20:04,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1324. [2021-11-09 09:20:04,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1321 states have (on average 1.3800151400454201) internal successors, (1823), 1323 states have internal predecessors, (1823), 0 states have call successors, (0), 0 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 09:20:04,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1823 transitions. [2021-11-09 09:20:04,461 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1823 transitions. Word has length 120 [2021-11-09 09:20:04,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:04,461 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 1823 transitions. [2021-11-09 09:20:04,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 53 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:04,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1823 transitions. [2021-11-09 09:20:04,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-09 09:20:04,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:04,463 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:04,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-09 09:20:04,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:04,678 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:20:04,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:04,678 INFO L85 PathProgramCache]: Analyzing trace with hash 238287807, now seen corresponding path program 19 times [2021-11-09 09:20:04,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:04,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317568016] [2021-11-09 09:20:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:04,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-09 09:20:05,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:05,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317568016] [2021-11-09 09:20:05,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317568016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:05,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463768502] [2021-11-09 09:20:05,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:20:05,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:05,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:05,397 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:05,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 09:20:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:06,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 09:20:06,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-09 09:20:06,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463768502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:06,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:20:06,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-09 09:20:06,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950465324] [2021-11-09 09:20:06,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 09:20:06,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:06,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 09:20:06,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 09:20:06,507 INFO L87 Difference]: Start difference. First operand 1324 states and 1823 transitions. Second operand has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 42 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:07,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:07,366 INFO L93 Difference]: Finished difference Result 2769 states and 3711 transitions. [2021-11-09 09:20:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 09:20:07,367 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 42 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-09 09:20:07,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:07,374 INFO L225 Difference]: With dead ends: 2769 [2021-11-09 09:20:07,375 INFO L226 Difference]: Without dead ends: 1524 [2021-11-09 09:20:07,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 125 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 09:20:07,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-11-09 09:20:07,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1348. [2021-11-09 09:20:07,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1345 states have (on average 1.3806691449814126) internal successors, (1857), 1347 states have internal predecessors, (1857), 0 states have call successors, (0), 0 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 09:20:07,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1857 transitions. [2021-11-09 09:20:07,435 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1857 transitions. Word has length 125 [2021-11-09 09:20:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:07,435 INFO L470 AbstractCegarLoop]: Abstraction has 1348 states and 1857 transitions. [2021-11-09 09:20:07,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 42 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:07,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1857 transitions. [2021-11-09 09:20:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-09 09:20:07,436 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:07,437 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:07,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 09:20:07,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-09 09:20:07,650 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:20:07,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:07,651 INFO L85 PathProgramCache]: Analyzing trace with hash 933279229, now seen corresponding path program 20 times [2021-11-09 09:20:07,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:07,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574776024] [2021-11-09 09:20:07,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:07,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-09 09:20:08,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:08,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574776024] [2021-11-09 09:20:08,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574776024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:08,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916402678] [2021-11-09 09:20:08,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:20:08,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:08,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:08,400 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:08,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 09:20:09,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:20:09,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:20:09,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 09:20:09,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-09 09:20:09,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916402678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:09,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:20:09,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-11-09 09:20:09,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174488847] [2021-11-09 09:20:09,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 09:20:09,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:09,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 09:20:09,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 09:20:09,515 INFO L87 Difference]: Start difference. First operand 1348 states and 1857 transitions. Second operand has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:10,396 INFO L93 Difference]: Finished difference Result 2819 states and 3779 transitions. [2021-11-09 09:20:10,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 09:20:10,397 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-09 09:20:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:10,400 INFO L225 Difference]: With dead ends: 2819 [2021-11-09 09:20:10,401 INFO L226 Difference]: Without dead ends: 1552 [2021-11-09 09:20:10,402 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 09:20:10,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-11-09 09:20:10,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1372. [2021-11-09 09:20:10,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1369 states have (on average 1.381300219138057) internal successors, (1891), 1371 states have internal predecessors, (1891), 0 states have call successors, (0), 0 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 09:20:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 1891 transitions. [2021-11-09 09:20:10,448 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 1891 transitions. Word has length 127 [2021-11-09 09:20:10,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:10,449 INFO L470 AbstractCegarLoop]: Abstraction has 1372 states and 1891 transitions. [2021-11-09 09:20:10,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2790697674418605) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:10,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 1891 transitions. [2021-11-09 09:20:10,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-09 09:20:10,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:10,451 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:10,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-09 09:20:10,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:10,674 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:20:10,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:10,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1194862405, now seen corresponding path program 21 times [2021-11-09 09:20:10,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:10,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087692478] [2021-11-09 09:20:10,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:10,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1810 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-09 09:20:11,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:11,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087692478] [2021-11-09 09:20:11,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087692478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:11,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076786194] [2021-11-09 09:20:11,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:20:11,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:11,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:11,404 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:11,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 09:20:12,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-09 09:20:12,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:20:12,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:20:12,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1810 backedges. 79 proven. 210 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2021-11-09 09:20:12,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076786194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:12,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:20:12,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 18] total 59 [2021-11-09 09:20:12,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120789979] [2021-11-09 09:20:12,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-09 09:20:12,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:12,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-09 09:20:12,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1139, Invalid=2283, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 09:20:12,930 INFO L87 Difference]: Start difference. First operand 1372 states and 1891 transitions. Second operand has 59 states, 59 states have (on average 2.406779661016949) internal successors, (142), 59 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 09:20:16,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:16,772 INFO L93 Difference]: Finished difference Result 2997 states and 4051 transitions. [2021-11-09 09:20:16,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-11-09 09:20:16,773 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.406779661016949) internal successors, (142), 59 states have internal predecessors, (142), 0 states have call successors, (0), 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 129 [2021-11-09 09:20:16,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:16,775 INFO L225 Difference]: With dead ends: 2997 [2021-11-09 09:20:16,775 INFO L226 Difference]: Without dead ends: 1708 [2021-11-09 09:20:16,777 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4815 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=8432, Invalid=13918, Unknown=0, NotChecked=0, Total=22350 [2021-11-09 09:20:16,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2021-11-09 09:20:16,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1492. [2021-11-09 09:20:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1489 states have (on average 1.3794492948287442) internal successors, (2054), 1491 states have internal predecessors, (2054), 0 states have call successors, (0), 0 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 09:20:16,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 2054 transitions. [2021-11-09 09:20:16,836 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 2054 transitions. Word has length 129 [2021-11-09 09:20:16,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:16,836 INFO L470 AbstractCegarLoop]: Abstraction has 1492 states and 2054 transitions. [2021-11-09 09:20:16,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.406779661016949) internal successors, (142), 59 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 09:20:16,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 2054 transitions. [2021-11-09 09:20:16,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-09 09:20:16,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:16,838 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:16,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-09 09:20:17,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:17,054 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:20:17,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:17,055 INFO L85 PathProgramCache]: Analyzing trace with hash -594574771, now seen corresponding path program 22 times [2021-11-09 09:20:17,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:17,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216414672] [2021-11-09 09:20:17,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:17,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2011 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-09 09:20:17,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:17,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216414672] [2021-11-09 09:20:17,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216414672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:17,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075831712] [2021-11-09 09:20:17,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:20:17,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:17,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:17,829 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:17,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 09:20:18,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:20:18,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:20:18,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-09 09:20:18,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2011 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-09 09:20:19,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075831712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:19,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:20:19,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-11-09 09:20:19,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258301140] [2021-11-09 09:20:19,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 09:20:19,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:19,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 09:20:19,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 09:20:19,071 INFO L87 Difference]: Start difference. First operand 1492 states and 2054 transitions. Second operand has 46 states, 46 states have (on average 2.260869565217391) internal successors, (104), 46 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 09:20:20,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:20,151 INFO L93 Difference]: Finished difference Result 3113 states and 4173 transitions. [2021-11-09 09:20:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 09:20:20,151 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.260869565217391) internal successors, (104), 46 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 136 [2021-11-09 09:20:20,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:20,154 INFO L225 Difference]: With dead ends: 3113 [2021-11-09 09:20:20,154 INFO L226 Difference]: Without dead ends: 1708 [2021-11-09 09:20:20,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 09:20:20,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2021-11-09 09:20:20,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1516. [2021-11-09 09:20:20,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1513 states have (on average 1.380039656311963) internal successors, (2088), 1515 states have internal predecessors, (2088), 0 states have call successors, (0), 0 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 09:20:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 2088 transitions. [2021-11-09 09:20:20,222 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 2088 transitions. Word has length 136 [2021-11-09 09:20:20,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:20,223 INFO L470 AbstractCegarLoop]: Abstraction has 1516 states and 2088 transitions. [2021-11-09 09:20:20,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.260869565217391) internal successors, (104), 46 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 09:20:20,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 2088 transitions. [2021-11-09 09:20:20,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-09 09:20:20,224 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:20,224 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:20,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-09 09:20:20,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-09 09:20:20,446 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:20:20,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:20,447 INFO L85 PathProgramCache]: Analyzing trace with hash -959408817, now seen corresponding path program 23 times [2021-11-09 09:20:20,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:20,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507760452] [2021-11-09 09:20:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:20,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2096 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-09 09:20:21,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:21,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507760452] [2021-11-09 09:20:21,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507760452] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:21,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358441215] [2021-11-09 09:20:21,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:20:21,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:21,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:21,294 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:21,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 09:20:55,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) [2021-11-09 09:20:55,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:20:55,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 09:20:55,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2096 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-09 09:20:55,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358441215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:55,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:20:55,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-11-09 09:20:55,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676184241] [2021-11-09 09:20:55,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-09 09:20:55,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:55,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-09 09:20:55,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 09:20:55,858 INFO L87 Difference]: Start difference. First operand 1516 states and 2088 transitions. Second operand has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 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 09:20:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:56,900 INFO L93 Difference]: Finished difference Result 3163 states and 4241 transitions. [2021-11-09 09:20:56,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-09 09:20:56,900 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 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 138 [2021-11-09 09:20:56,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:56,902 INFO L225 Difference]: With dead ends: 3163 [2021-11-09 09:20:56,902 INFO L226 Difference]: Without dead ends: 1736 [2021-11-09 09:20:56,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 09:20:56,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-11-09 09:20:56,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1540. [2021-11-09 09:20:56,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1537 states have (on average 1.380611581001952) internal successors, (2122), 1539 states have internal predecessors, (2122), 0 states have call successors, (0), 0 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 09:20:56,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 2122 transitions. [2021-11-09 09:20:56,950 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 2122 transitions. Word has length 138 [2021-11-09 09:20:56,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:56,950 INFO L470 AbstractCegarLoop]: Abstraction has 1540 states and 2122 transitions. [2021-11-09 09:20:56,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 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 09:20:56,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 2122 transitions. [2021-11-09 09:20:56,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-09 09:20:56,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:56,951 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:56,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-09 09:20:57,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-09 09:20:57,151 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:20:57,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:57,152 INFO L85 PathProgramCache]: Analyzing trace with hash 622391249, now seen corresponding path program 24 times [2021-11-09 09:20:57,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:57,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298243854] [2021-11-09 09:20:57,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:57,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2183 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-09 09:20:58,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:58,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298243854] [2021-11-09 09:20:58,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298243854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:58,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457658766] [2021-11-09 09:20:58,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:20:58,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:58,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:58,114 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:58,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 09:21:00,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-11-09 09:21:00,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:21:00,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:21:00,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:21:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2183 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2021-11-09 09:21:00,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457658766] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:00,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:21:00,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 17] total 62 [2021-11-09 09:21:00,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93109069] [2021-11-09 09:21:00,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-09 09:21:00,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:21:00,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-09 09:21:01,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1247, Invalid=2535, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 09:21:01,000 INFO L87 Difference]: Start difference. First operand 1540 states and 2122 transitions. Second operand has 62 states, 62 states have (on average 2.435483870967742) internal successors, (151), 62 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 09:21:05,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:21:05,739 INFO L93 Difference]: Finished difference Result 3349 states and 4525 transitions. [2021-11-09 09:21:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-11-09 09:21:05,740 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.435483870967742) internal successors, (151), 62 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) Word has length 140 [2021-11-09 09:21:05,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:21:05,742 INFO L225 Difference]: With dead ends: 3349 [2021-11-09 09:21:05,742 INFO L226 Difference]: Without dead ends: 1900 [2021-11-09 09:21:05,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6268 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=10396, Invalid=17326, Unknown=0, NotChecked=0, Total=27722 [2021-11-09 09:21:05,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2021-11-09 09:21:05,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1642. [2021-11-09 09:21:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1639 states have (on average 1.3782794386821233) internal successors, (2259), 1641 states have internal predecessors, (2259), 0 states have call successors, (0), 0 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 09:21:05,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2259 transitions. [2021-11-09 09:21:05,792 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2259 transitions. Word has length 140 [2021-11-09 09:21:05,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:21:05,792 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 2259 transitions. [2021-11-09 09:21:05,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.435483870967742) internal successors, (151), 62 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 09:21:05,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2259 transitions. [2021-11-09 09:21:05,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-09 09:21:05,793 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:21:05,794 INFO L513 BasicCegarLoop]: trace histogram [45, 45, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:21:05,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-09 09:21:06,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-09 09:21:06,000 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:21:06,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:21:06,000 INFO L85 PathProgramCache]: Analyzing trace with hash -275897679, now seen corresponding path program 25 times [2021-11-09 09:21:06,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:21:06,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458617051] [2021-11-09 09:21:06,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:21:06,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:21:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:07,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-09 09:21:07,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:21:07,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458617051] [2021-11-09 09:21:07,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458617051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:07,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717629733] [2021-11-09 09:21:07,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:21:07,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:07,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:21:07,059 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:21:07,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 09:21:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:08,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 09:21:08,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:21:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-09 09:21:08,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717629733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:08,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:21:08,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-11-09 09:21:08,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104900759] [2021-11-09 09:21:08,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 09:21:08,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:21:08,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 09:21:08,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 09:21:08,585 INFO L87 Difference]: Start difference. First operand 1642 states and 2259 transitions. Second operand has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 09:21:09,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:21:09,894 INFO L93 Difference]: Finished difference Result 3419 states and 4583 transitions. [2021-11-09 09:21:09,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-09 09:21:09,894 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 0 states have call successors, (0), 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 09:21:09,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:21:09,898 INFO L225 Difference]: With dead ends: 3419 [2021-11-09 09:21:09,898 INFO L226 Difference]: Without dead ends: 1870 [2021-11-09 09:21:09,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 09:21:09,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2021-11-09 09:21:09,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1666. [2021-11-09 09:21:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1663 states have (on average 1.3788334335538184) internal successors, (2293), 1665 states have internal predecessors, (2293), 0 states have call successors, (0), 0 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 09:21:09,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2293 transitions. [2021-11-09 09:21:09,976 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2293 transitions. Word has length 145 [2021-11-09 09:21:09,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:21:09,977 INFO L470 AbstractCegarLoop]: Abstraction has 1666 states and 2293 transitions. [2021-11-09 09:21:09,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 09:21:09,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2293 transitions. [2021-11-09 09:21:09,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-09 09:21:09,978 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:21:09,978 INFO L513 BasicCegarLoop]: trace histogram [46, 46, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:21:10,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-09 09:21:10,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-09 09:21:10,206 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:21:10,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:21:10,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1516589551, now seen corresponding path program 26 times [2021-11-09 09:21:10,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:21:10,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584846955] [2021-11-09 09:21:10,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:21:10,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:21:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-09 09:21:11,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:21:11,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584846955] [2021-11-09 09:21:11,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584846955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:11,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747975400] [2021-11-09 09:21:11,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:21:11,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:11,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:21:11,239 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:21:11,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-09 09:21:12,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:21:12,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:21:12,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-09 09:21:12,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:21:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-09 09:21:12,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747975400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:12,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:21:12,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-11-09 09:21:12,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766476079] [2021-11-09 09:21:12,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-09 09:21:12,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:21:12,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-09 09:21:12,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 09:21:12,741 INFO L87 Difference]: Start difference. First operand 1666 states and 2293 transitions. Second operand has 50 states, 50 states have (on average 2.24) internal successors, (112), 50 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 09:21:13,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:21:13,928 INFO L93 Difference]: Finished difference Result 3469 states and 4651 transitions. [2021-11-09 09:21:13,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-09 09:21:13,929 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 50 states have internal predecessors, (112), 0 states have call successors, (0), 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 09:21:13,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:21:13,932 INFO L225 Difference]: With dead ends: 3469 [2021-11-09 09:21:13,932 INFO L226 Difference]: Without dead ends: 1898 [2021-11-09 09:21:13,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 09:21:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2021-11-09 09:21:13,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1690. [2021-11-09 09:21:13,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1687 states have (on average 1.3793716656787196) internal successors, (2327), 1689 states have internal predecessors, (2327), 0 states have call successors, (0), 0 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 09:21:13,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2327 transitions. [2021-11-09 09:21:13,981 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2327 transitions. Word has length 147 [2021-11-09 09:21:13,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:21:13,981 INFO L470 AbstractCegarLoop]: Abstraction has 1690 states and 2327 transitions. [2021-11-09 09:21:13,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 50 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 09:21:13,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2327 transitions. [2021-11-09 09:21:13,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-09 09:21:13,982 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:21:13,982 INFO L513 BasicCegarLoop]: trace histogram [47, 47, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:21:14,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-09 09:21:14,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-09 09:21:14,183 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:21:14,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:21:14,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1814931885, now seen corresponding path program 27 times [2021-11-09 09:21:14,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:21:14,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116314862] [2021-11-09 09:21:14,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:21:14,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:21:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2496 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-09 09:21:15,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:21:15,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116314862] [2021-11-09 09:21:15,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116314862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:15,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292053758] [2021-11-09 09:21:15,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:21:15,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:15,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:21:15,191 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:21:15,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-09 09:21:16,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-09 09:21:16,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:21:16,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 09:21:16,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:21:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2496 backedges. 93 proven. 287 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2021-11-09 09:21:17,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292053758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:17,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:21:17,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 20] total 68 [2021-11-09 09:21:17,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057756155] [2021-11-09 09:21:17,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-09 09:21:17,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:21:17,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-09 09:21:17,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1513, Invalid=3043, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 09:21:17,132 INFO L87 Difference]: Start difference. First operand 1690 states and 2327 transitions. Second operand has 68 states, 68 states have (on average 2.3823529411764706) internal successors, (162), 68 states have internal predecessors, (162), 0 states have call successors, (0), 0 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 09:21:22,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:21:22,898 INFO L93 Difference]: Finished difference Result 3667 states and 4955 transitions. [2021-11-09 09:21:22,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-11-09 09:21:22,899 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.3823529411764706) internal successors, (162), 68 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-09 09:21:22,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:21:22,901 INFO L225 Difference]: With dead ends: 3667 [2021-11-09 09:21:22,901 INFO L226 Difference]: Without dead ends: 2074 [2021-11-09 09:21:22,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8092 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=13208, Invalid=21948, Unknown=0, NotChecked=0, Total=35156 [2021-11-09 09:21:22,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-11-09 09:21:22,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1822. [2021-11-09 09:21:22,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1819 states have (on average 1.3776800439802088) internal successors, (2506), 1821 states have internal predecessors, (2506), 0 states have call successors, (0), 0 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 09:21:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2506 transitions. [2021-11-09 09:21:22,957 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2506 transitions. Word has length 149 [2021-11-09 09:21:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:21:22,957 INFO L470 AbstractCegarLoop]: Abstraction has 1822 states and 2506 transitions. [2021-11-09 09:21:22,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.3823529411764706) internal successors, (162), 68 states have internal predecessors, (162), 0 states have call successors, (0), 0 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 09:21:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2506 transitions. [2021-11-09 09:21:22,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-09 09:21:22,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:21:22,959 INFO L513 BasicCegarLoop]: trace histogram [49, 49, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:21:22,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-09 09:21:23,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:23,170 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:21:23,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:21:23,170 INFO L85 PathProgramCache]: Analyzing trace with hash -177812965, now seen corresponding path program 28 times [2021-11-09 09:21:23,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:21:23,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174825164] [2021-11-09 09:21:23,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:21:23,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:21:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2731 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-09 09:21:24,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:21:24,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174825164] [2021-11-09 09:21:24,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174825164] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:24,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303611722] [2021-11-09 09:21:24,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:21:24,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:24,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:21:24,279 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:21:24,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-09 09:21:25,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:21:25,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:21:25,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 09:21:25,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:21:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2731 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-09 09:21:25,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303611722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:25,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:21:25,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-11-09 09:21:25,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609771877] [2021-11-09 09:21:25,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-09 09:21:25,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:21:25,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-09 09:21:25,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 09:21:25,818 INFO L87 Difference]: Start difference. First operand 1822 states and 2506 transitions. Second operand has 53 states, 53 states have (on average 2.2264150943396226) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 09:21:27,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:21:27,135 INFO L93 Difference]: Finished difference Result 3787 states and 5077 transitions. [2021-11-09 09:21:27,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-09 09:21:27,135 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2264150943396226) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 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 156 [2021-11-09 09:21:27,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:21:27,138 INFO L225 Difference]: With dead ends: 3787 [2021-11-09 09:21:27,138 INFO L226 Difference]: Without dead ends: 2066 [2021-11-09 09:21:27,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 09:21:27,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2021-11-09 09:21:27,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1846. [2021-11-09 09:21:27,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1843 states have (on average 1.378187737384699) internal successors, (2540), 1845 states have internal predecessors, (2540), 0 states have call successors, (0), 0 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 09:21:27,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 2540 transitions. [2021-11-09 09:21:27,229 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 2540 transitions. Word has length 156 [2021-11-09 09:21:27,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:21:27,229 INFO L470 AbstractCegarLoop]: Abstraction has 1846 states and 2540 transitions. [2021-11-09 09:21:27,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2264150943396226) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 09:21:27,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 2540 transitions. [2021-11-09 09:21:27,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-09 09:21:27,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:21:27,231 INFO L513 BasicCegarLoop]: trace histogram [50, 50, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:21:27,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-09 09:21:27,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-09 09:21:27,450 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:21:27,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:21:27,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1466808291, now seen corresponding path program 29 times [2021-11-09 09:21:27,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:21:27,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468802266] [2021-11-09 09:21:27,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:21:27,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:21:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2830 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-09 09:21:28,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:21:28,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468802266] [2021-11-09 09:21:28,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468802266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:28,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868496738] [2021-11-09 09:21:28,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:21:28,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:28,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:21:28,439 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:21:28,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-09 09:22:59,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2021-11-09 09:22:59,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:22:59,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-09 09:22:59,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:23:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2830 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-09 09:23:00,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868496738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:00,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:23:00,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-11-09 09:23:00,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838013715] [2021-11-09 09:23:00,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-09 09:23:00,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:23:00,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-09 09:23:00,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 09:23:00,280 INFO L87 Difference]: Start difference. First operand 1846 states and 2540 transitions. Second operand has 54 states, 54 states have (on average 2.2222222222222223) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:23:01,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:23:01,635 INFO L93 Difference]: Finished difference Result 3837 states and 5145 transitions. [2021-11-09 09:23:01,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-09 09:23:01,635 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.2222222222222223) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-09 09:23:01,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:23:01,639 INFO L225 Difference]: With dead ends: 3837 [2021-11-09 09:23:01,639 INFO L226 Difference]: Without dead ends: 2094 [2021-11-09 09:23:01,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 09:23:01,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2021-11-09 09:23:01,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 1870. [2021-11-09 09:23:01,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1867 states have (on average 1.3786823781467594) internal successors, (2574), 1869 states have internal predecessors, (2574), 0 states have call successors, (0), 0 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 09:23:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2574 transitions. [2021-11-09 09:23:01,747 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2574 transitions. Word has length 158 [2021-11-09 09:23:01,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:23:01,747 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2574 transitions. [2021-11-09 09:23:01,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.2222222222222223) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:23:01,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2574 transitions. [2021-11-09 09:23:01,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-09 09:23:01,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:23:01,748 INFO L513 BasicCegarLoop]: trace histogram [51, 51, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:23:01,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-09 09:23:01,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:23:01,949 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:23:01,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:23:01,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1054231967, now seen corresponding path program 30 times [2021-11-09 09:23:01,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:23:01,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547555365] [2021-11-09 09:23:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:23:01,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:23:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-09 09:23:02,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:23:02,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547555365] [2021-11-09 09:23:02,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547555365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:02,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847813859] [2021-11-09 09:23:02,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:23:02,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:23:02,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:23:02,973 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:23:02,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-09 09:23:08,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-11-09 09:23:08,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:23:08,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 09:23:08,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:23:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 101 proven. 330 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2021-11-09 09:23:08,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847813859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:08,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:23:08,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 21] total 73 [2021-11-09 09:23:08,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243814995] [2021-11-09 09:23:08,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-09 09:23:08,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:23:08,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-09 09:23:08,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1748, Invalid=3508, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 09:23:08,863 INFO L87 Difference]: Start difference. First operand 1870 states and 2574 transitions. Second operand has 73 states, 73 states have (on average 2.3698630136986303) internal successors, (173), 73 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 09:23:16,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:23:16,419 INFO L93 Difference]: Finished difference Result 4045 states and 5465 transitions. [2021-11-09 09:23:16,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-09 09:23:16,419 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.3698630136986303) internal successors, (173), 73 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) Word has length 160 [2021-11-09 09:23:16,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:23:16,422 INFO L225 Difference]: With dead ends: 4045 [2021-11-09 09:23:16,422 INFO L226 Difference]: Without dead ends: 2280 [2021-11-09 09:23:16,425 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10269 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=16316, Invalid=27156, Unknown=0, NotChecked=0, Total=43472 [2021-11-09 09:23:16,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-11-09 09:23:16,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 2008. [2021-11-09 09:23:16,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2005 states have (on average 1.3770573566084787) internal successors, (2761), 2007 states have internal predecessors, (2761), 0 states have call successors, (0), 0 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 09:23:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 2761 transitions. [2021-11-09 09:23:16,489 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 2761 transitions. Word has length 160 [2021-11-09 09:23:16,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:23:16,489 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 2761 transitions. [2021-11-09 09:23:16,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.3698630136986303) internal successors, (173), 73 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 09:23:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 2761 transitions. [2021-11-09 09:23:16,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-09 09:23:16,490 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:23:16,490 INFO L513 BasicCegarLoop]: trace histogram [53, 53, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:23:16,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-11-09 09:23:16,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:23:16,691 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:23:16,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:23:16,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1617011553, now seen corresponding path program 31 times [2021-11-09 09:23:16,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:23:16,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584583957] [2021-11-09 09:23:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:23:16,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:23:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3185 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 09:23:17,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:23:17,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584583957] [2021-11-09 09:23:17,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584583957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:17,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556528068] [2021-11-09 09:23:17,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:23:17,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:23:17,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:23:17,924 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:23:17,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-09 09:23:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:19,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 09:23:19,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:23:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3185 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 09:23:19,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556528068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:19,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:23:19,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-11-09 09:23:19,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53768251] [2021-11-09 09:23:19,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-09 09:23:19,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:23:19,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-09 09:23:19,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 09:23:19,582 INFO L87 Difference]: Start difference. First operand 2008 states and 2761 transitions. Second operand has 57 states, 57 states have (on average 2.210526315789474) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:23:21,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:23:21,257 INFO L93 Difference]: Finished difference Result 4167 states and 5587 transitions. [2021-11-09 09:23:21,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-09 09:23:21,258 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.210526315789474) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-11-09 09:23:21,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:23:21,264 INFO L225 Difference]: With dead ends: 4167 [2021-11-09 09:23:21,264 INFO L226 Difference]: Without dead ends: 2268 [2021-11-09 09:23:21,266 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 167 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 09:23:21,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2021-11-09 09:23:21,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 2032. [2021-11-09 09:23:21,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2029 states have (on average 1.37752587481518) internal successors, (2795), 2031 states have internal predecessors, (2795), 0 states have call successors, (0), 0 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 09:23:21,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 2795 transitions. [2021-11-09 09:23:21,398 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 2795 transitions. Word has length 167 [2021-11-09 09:23:21,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:23:21,398 INFO L470 AbstractCegarLoop]: Abstraction has 2032 states and 2795 transitions. [2021-11-09 09:23:21,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.210526315789474) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:23:21,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 2795 transitions. [2021-11-09 09:23:21,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-09 09:23:21,400 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:23:21,400 INFO L513 BasicCegarLoop]: trace histogram [54, 54, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:23:21,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-09 09:23:21,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-09 09:23:21,614 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:23:21,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:23:21,615 INFO L85 PathProgramCache]: Analyzing trace with hash 320778271, now seen corresponding path program 32 times [2021-11-09 09:23:21,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:23:21,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105049136] [2021-11-09 09:23:21,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:23:21,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:23:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3292 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 09:23:22,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:23:22,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105049136] [2021-11-09 09:23:22,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105049136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:22,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169132857] [2021-11-09 09:23:22,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:23:22,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:23:22,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:23:22,958 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:23:22,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-09 09:23:24,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:23:24,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:23:24,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-09 09:23:24,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:23:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3292 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 09:23:24,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169132857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:24,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:23:24,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-11-09 09:23:24,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591770560] [2021-11-09 09:23:24,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-09 09:23:24,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:23:24,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-09 09:23:24,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 09:23:24,679 INFO L87 Difference]: Start difference. First operand 2032 states and 2795 transitions. Second operand has 58 states, 58 states have (on average 2.206896551724138) internal successors, (128), 58 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:23:26,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:23:26,388 INFO L93 Difference]: Finished difference Result 4217 states and 5655 transitions. [2021-11-09 09:23:26,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-09 09:23:26,389 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.206896551724138) internal successors, (128), 58 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-11-09 09:23:26,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:23:26,391 INFO L225 Difference]: With dead ends: 4217 [2021-11-09 09:23:26,391 INFO L226 Difference]: Without dead ends: 2296 [2021-11-09 09:23:26,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 09:23:26,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-11-09 09:23:26,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 2056. [2021-11-09 09:23:26,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 2053 states have (on average 1.3779834388699463) internal successors, (2829), 2055 states have internal predecessors, (2829), 0 states have call successors, (0), 0 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 09:23:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2829 transitions. [2021-11-09 09:23:26,498 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2829 transitions. Word has length 169 [2021-11-09 09:23:26,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:23:26,499 INFO L470 AbstractCegarLoop]: Abstraction has 2056 states and 2829 transitions. [2021-11-09 09:23:26,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.206896551724138) internal successors, (128), 58 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:23:26,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2829 transitions. [2021-11-09 09:23:26,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-09 09:23:26,500 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:23:26,500 INFO L513 BasicCegarLoop]: trace histogram [55, 55, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:23:26,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-09 09:23:26,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-09 09:23:26,714 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:23:26,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:23:26,714 INFO L85 PathProgramCache]: Analyzing trace with hash 181110109, now seen corresponding path program 33 times [2021-11-09 09:23:26,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:23:26,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360754954] [2021-11-09 09:23:26,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:23:26,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:23:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 09:23:27,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:23:27,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360754954] [2021-11-09 09:23:27,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360754954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:27,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932974624] [2021-11-09 09:23:27,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:23:27,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:23:27,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:23:27,954 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:23:27,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-09 09:23:29,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-11-09 09:23:29,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:23:29,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:23:29,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:23:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2021-11-09 09:23:30,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932974624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:30,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:23:30,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 20] total 76 [2021-11-09 09:23:30,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429473435] [2021-11-09 09:23:30,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-09 09:23:30,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:23:30,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-09 09:23:30,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1881, Invalid=3819, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 09:23:30,372 INFO L87 Difference]: Start difference. First operand 2056 states and 2829 transitions. Second operand has 76 states, 76 states have (on average 2.3947368421052633) internal successors, (182), 76 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 09:23:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:23:39,651 INFO L93 Difference]: Finished difference Result 4433 states and 5987 transitions. [2021-11-09 09:23:39,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2021-11-09 09:23:39,652 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.3947368421052633) internal successors, (182), 76 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 171 [2021-11-09 09:23:39,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:23:39,653 INFO L225 Difference]: With dead ends: 4433 [2021-11-09 09:23:39,654 INFO L226 Difference]: Without dead ends: 2490 [2021-11-09 09:23:39,659 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12825 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=19493, Invalid=32719, Unknown=0, NotChecked=0, Total=52212 [2021-11-09 09:23:39,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-11-09 09:23:39,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 2176. [2021-11-09 09:23:39,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2173 states have (on average 1.3759779107225034) internal successors, (2990), 2175 states have internal predecessors, (2990), 0 states have call successors, (0), 0 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 09:23:39,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 2990 transitions. [2021-11-09 09:23:39,731 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 2990 transitions. Word has length 171 [2021-11-09 09:23:39,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:23:39,732 INFO L470 AbstractCegarLoop]: Abstraction has 2176 states and 2990 transitions. [2021-11-09 09:23:39,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.3947368421052633) internal successors, (182), 76 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 09:23:39,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 2990 transitions. [2021-11-09 09:23:39,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-09 09:23:39,733 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:23:39,733 INFO L513 BasicCegarLoop]: trace histogram [56, 56, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:23:39,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-09 09:23:39,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-09 09:23:39,946 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:23:39,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:23:39,946 INFO L85 PathProgramCache]: Analyzing trace with hash 767421545, now seen corresponding path program 34 times [2021-11-09 09:23:39,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:23:39,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176051140] [2021-11-09 09:23:39,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:23:39,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:23:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3561 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-09 09:23:41,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:23:41,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176051140] [2021-11-09 09:23:41,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176051140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:41,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133558181] [2021-11-09 09:23:41,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:23:41,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:23:41,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:23:41,412 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:23:41,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-09 09:23:42,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:23:42,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:23:42,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-09 09:23:42,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:23:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3561 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-09 09:23:43,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133558181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:43,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:23:43,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-11-09 09:23:43,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731200070] [2021-11-09 09:23:43,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-09 09:23:43,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:23:43,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-09 09:23:43,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 09:23:43,283 INFO L87 Difference]: Start difference. First operand 2176 states and 2990 transitions. Second operand has 60 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:23:45,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:23:45,071 INFO L93 Difference]: Finished difference Result 4509 states and 6045 transitions. [2021-11-09 09:23:45,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-09 09:23:45,072 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2021-11-09 09:23:45,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:23:45,074 INFO L225 Difference]: With dead ends: 4509 [2021-11-09 09:23:45,074 INFO L226 Difference]: Without dead ends: 2448 [2021-11-09 09:23:45,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 176 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 09:23:45,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-11-09 09:23:45,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2200. [2021-11-09 09:23:45,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2197 states have (on average 1.3764223941738734) internal successors, (3024), 2199 states have internal predecessors, (3024), 0 states have call successors, (0), 0 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 09:23:45,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 3024 transitions. [2021-11-09 09:23:45,190 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 3024 transitions. Word has length 176 [2021-11-09 09:23:45,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:23:45,191 INFO L470 AbstractCegarLoop]: Abstraction has 2200 states and 3024 transitions. [2021-11-09 09:23:45,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:23:45,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 3024 transitions. [2021-11-09 09:23:45,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-09 09:23:45,192 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:23:45,193 INFO L513 BasicCegarLoop]: trace histogram [57, 57, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:23:45,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-09 09:23:45,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-09 09:23:45,396 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:23:45,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:23:45,396 INFO L85 PathProgramCache]: Analyzing trace with hash -9415317, now seen corresponding path program 35 times [2021-11-09 09:23:45,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:23:45,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156900381] [2021-11-09 09:23:45,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:23:45,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:23:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3674 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-09 09:23:46,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:23:46,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156900381] [2021-11-09 09:23:46,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156900381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:46,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427840421] [2021-11-09 09:23:46,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:23:46,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:23:46,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:23:46,683 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:23:46,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-09 09:25:13,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2021-11-09 09:25:13,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:25:13,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-09 09:25:13,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:25:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3674 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-09 09:25:14,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427840421] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:25:14,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:25:14,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2021-11-09 09:25:14,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99275613] [2021-11-09 09:25:14,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-09 09:25:14,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:25:14,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-09 09:25:14,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 09:25:14,065 INFO L87 Difference]: Start difference. First operand 2200 states and 3024 transitions. Second operand has 61 states, 61 states have (on average 2.19672131147541) internal successors, (134), 61 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 09:25:16,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:25:16,077 INFO L93 Difference]: Finished difference Result 4559 states and 6113 transitions. [2021-11-09 09:25:16,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-09 09:25:16,078 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.19672131147541) internal successors, (134), 61 states have internal predecessors, (134), 0 states have call successors, (0), 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 178 [2021-11-09 09:25:16,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:25:16,080 INFO L225 Difference]: With dead ends: 4559 [2021-11-09 09:25:16,080 INFO L226 Difference]: Without dead ends: 2476 [2021-11-09 09:25:16,081 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 09:25:16,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-11-09 09:25:16,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 2224. [2021-11-09 09:25:16,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2221 states have (on average 1.3768572714993246) internal successors, (3058), 2223 states have internal predecessors, (3058), 0 states have call successors, (0), 0 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 09:25:16,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3058 transitions. [2021-11-09 09:25:16,154 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3058 transitions. Word has length 178 [2021-11-09 09:25:16,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:25:16,154 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 3058 transitions. [2021-11-09 09:25:16,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.19672131147541) internal successors, (134), 61 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 09:25:16,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3058 transitions. [2021-11-09 09:25:16,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 09:25:16,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:25:16,155 INFO L513 BasicCegarLoop]: trace histogram [58, 58, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:25:16,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-09 09:25:16,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:25:16,356 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:25:16,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:25:16,356 INFO L85 PathProgramCache]: Analyzing trace with hash 774669805, now seen corresponding path program 36 times [2021-11-09 09:25:16,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:25:16,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485368639] [2021-11-09 09:25:16,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:25:16,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:25:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:25:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3789 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-09 09:25:17,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:25:17,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485368639] [2021-11-09 09:25:17,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485368639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:25:17,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933061200] [2021-11-09 09:25:17,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:25:17,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:25:17,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:25:17,804 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:25:17,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-09 09:25:28,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2021-11-09 09:25:28,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:25:28,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:25:28,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:25:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3789 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 3364 trivial. 0 not checked. [2021-11-09 09:25:28,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933061200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:25:28,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:25:28,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 21] total 80 [2021-11-09 09:25:28,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275277253] [2021-11-09 09:25:28,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-09 09:25:28,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:25:28,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-09 09:25:28,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=4240, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 09:25:28,879 INFO L87 Difference]: Start difference. First operand 2224 states and 3058 transitions. Second operand has 80 states, 80 states have (on average 2.3875) internal successors, (191), 80 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:25:40,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:25:40,403 INFO L93 Difference]: Finished difference Result 4785 states and 6461 transitions. [2021-11-09 09:25:40,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 232 states. [2021-11-09 09:25:40,404 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.3875) internal successors, (191), 80 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-11-09 09:25:40,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:25:40,406 INFO L225 Difference]: With dead ends: 4785 [2021-11-09 09:25:40,406 INFO L226 Difference]: Without dead ends: 2680 [2021-11-09 09:25:40,410 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15865 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=23359, Invalid=39391, Unknown=0, NotChecked=0, Total=62750 [2021-11-09 09:25:40,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-11-09 09:25:40,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2350. [2021-11-09 09:25:40,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2347 states have (on average 1.3749467405198126) internal successors, (3227), 2349 states have internal predecessors, (3227), 0 states have call successors, (0), 0 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 09:25:40,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3227 transitions. [2021-11-09 09:25:40,488 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3227 transitions. Word has length 180 [2021-11-09 09:25:40,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:25:40,488 INFO L470 AbstractCegarLoop]: Abstraction has 2350 states and 3227 transitions. [2021-11-09 09:25:40,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.3875) internal successors, (191), 80 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:25:40,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3227 transitions. [2021-11-09 09:25:40,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-09 09:25:40,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:25:40,490 INFO L513 BasicCegarLoop]: trace histogram [59, 59, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:25:40,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-09 09:25:40,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-09 09:25:40,703 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:25:40,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:25:40,703 INFO L85 PathProgramCache]: Analyzing trace with hash -631672555, now seen corresponding path program 37 times [2021-11-09 09:25:40,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:25:40,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474982353] [2021-11-09 09:25:40,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:25:40,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:25:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:25:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3958 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-09 09:25:42,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:25:42,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474982353] [2021-11-09 09:25:42,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474982353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:25:42,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002474682] [2021-11-09 09:25:42,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:25:42,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:25:42,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:25:42,042 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:25:42,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-09 09:25:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:25:43,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-09 09:25:43,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:25:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3958 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-09 09:25:44,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002474682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:25:44,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:25:44,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2021-11-09 09:25:44,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046341420] [2021-11-09 09:25:44,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-09 09:25:44,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:25:44,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-09 09:25:44,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 09:25:44,132 INFO L87 Difference]: Start difference. First operand 2350 states and 3227 transitions. Second operand has 63 states, 63 states have (on average 2.1904761904761907) internal successors, (138), 63 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 09:25:46,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:25:46,438 INFO L93 Difference]: Finished difference Result 4863 states and 6519 transitions. [2021-11-09 09:25:46,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-09 09:25:46,439 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.1904761904761907) internal successors, (138), 63 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 185 [2021-11-09 09:25:46,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:25:46,442 INFO L225 Difference]: With dead ends: 4863 [2021-11-09 09:25:46,442 INFO L226 Difference]: Without dead ends: 2634 [2021-11-09 09:25:46,446 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 09:25:46,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-11-09 09:25:46,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2374. [2021-11-09 09:25:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2374 states, 2371 states have (on average 1.3753690425980598) internal successors, (3261), 2373 states have internal predecessors, (3261), 0 states have call successors, (0), 0 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 09:25:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 3261 transitions. [2021-11-09 09:25:46,532 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 3261 transitions. Word has length 185 [2021-11-09 09:25:46,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:25:46,533 INFO L470 AbstractCegarLoop]: Abstraction has 2374 states and 3261 transitions. [2021-11-09 09:25:46,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.1904761904761907) internal successors, (138), 63 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 09:25:46,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 3261 transitions. [2021-11-09 09:25:46,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-09 09:25:46,534 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:25:46,534 INFO L513 BasicCegarLoop]: trace histogram [60, 60, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:25:46,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-09 09:25:46,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:25:46,743 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:25:46,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:25:46,743 INFO L85 PathProgramCache]: Analyzing trace with hash -656405933, now seen corresponding path program 38 times [2021-11-09 09:25:46,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:25:46,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142401590] [2021-11-09 09:25:46,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:25:46,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:25:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:25:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4077 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-09 09:25:48,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:25:48,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142401590] [2021-11-09 09:25:48,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142401590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:25:48,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828320897] [2021-11-09 09:25:48,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:25:48,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:25:48,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:25:48,170 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:25:48,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-09 09:25:49,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:25:49,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:25:49,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-09 09:25:49,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:25:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4077 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-09 09:25:50,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828320897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:25:50,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:25:50,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-11-09 09:25:50,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111457346] [2021-11-09 09:25:50,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-09 09:25:50,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:25:50,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-09 09:25:50,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 09:25:50,284 INFO L87 Difference]: Start difference. First operand 2374 states and 3261 transitions. Second operand has 64 states, 64 states have (on average 2.1875) internal successors, (140), 64 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 09:25:52,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:25:52,582 INFO L93 Difference]: Finished difference Result 4913 states and 6587 transitions. [2021-11-09 09:25:52,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-09 09:25:52,582 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.1875) internal successors, (140), 64 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 187 [2021-11-09 09:25:52,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:25:52,584 INFO L225 Difference]: With dead ends: 4913 [2021-11-09 09:25:52,585 INFO L226 Difference]: Without dead ends: 2662 [2021-11-09 09:25:52,586 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 09:25:52,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2021-11-09 09:25:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 2398. [2021-11-09 09:25:52,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2395 states have (on average 1.3757828810020878) internal successors, (3295), 2397 states have internal predecessors, (3295), 0 states have call successors, (0), 0 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 09:25:52,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 3295 transitions. [2021-11-09 09:25:52,671 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 3295 transitions. Word has length 187 [2021-11-09 09:25:52,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:25:52,671 INFO L470 AbstractCegarLoop]: Abstraction has 2398 states and 3295 transitions. [2021-11-09 09:25:52,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.1875) internal successors, (140), 64 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 09:25:52,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 3295 transitions. [2021-11-09 09:25:52,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-09 09:25:52,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:25:52,673 INFO L513 BasicCegarLoop]: trace histogram [61, 61, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:25:52,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-09 09:25:52,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:25:52,873 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:25:52,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:25:52,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1344621585, now seen corresponding path program 39 times [2021-11-09 09:25:52,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:25:52,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851228086] [2021-11-09 09:25:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:25:52,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:25:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:25:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4198 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-09 09:25:54,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:25:54,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851228086] [2021-11-09 09:25:54,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851228086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:25:54,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104407040] [2021-11-09 09:25:54,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:25:54,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:25:54,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:25:54,313 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:25:54,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-09 09:25:56,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-11-09 09:25:56,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:25:56,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:25:56,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:25:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4198 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 3721 trivial. 0 not checked. [2021-11-09 09:25:57,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104407040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:25:57,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:25:57,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 22] total 84 [2021-11-09 09:25:57,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096120059] [2021-11-09 09:25:57,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-09 09:25:57,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:25:57,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-09 09:25:57,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2289, Invalid=4683, Unknown=0, NotChecked=0, Total=6972 [2021-11-09 09:25:57,511 INFO L87 Difference]: Start difference. First operand 2398 states and 3295 transitions. Second operand has 84 states, 84 states have (on average 2.380952380952381) internal successors, (200), 84 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:26:11,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:26:11,685 INFO L93 Difference]: Finished difference Result 5149 states and 6951 transitions. [2021-11-09 09:26:11,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2021-11-09 09:26:11,685 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.380952380952381) internal successors, (200), 84 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-11-09 09:26:11,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:26:11,687 INFO L225 Difference]: With dead ends: 5149 [2021-11-09 09:26:11,688 INFO L226 Difference]: Without dead ends: 2876 [2021-11-09 09:26:11,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19425 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=27768, Invalid=47034, Unknown=0, NotChecked=0, Total=74802 [2021-11-09 09:26:11,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-11-09 09:26:11,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2530. [2021-11-09 09:26:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2527 states have (on average 1.373961218836565) internal successors, (3472), 2529 states have internal predecessors, (3472), 0 states have call successors, (0), 0 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 09:26:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 3472 transitions. [2021-11-09 09:26:11,780 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 3472 transitions. Word has length 189 [2021-11-09 09:26:11,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:26:11,780 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 3472 transitions. [2021-11-09 09:26:11,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.380952380952381) internal successors, (200), 84 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:26:11,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 3472 transitions. [2021-11-09 09:26:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-09 09:26:11,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:26:11,781 INFO L513 BasicCegarLoop]: trace histogram [62, 62, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:26:11,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-09 09:26:11,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:26:11,986 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:26:11,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:26:11,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1028627637, now seen corresponding path program 40 times [2021-11-09 09:26:11,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:26:11,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643912818] [2021-11-09 09:26:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:26:11,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:26:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:26:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4376 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-09 09:26:13,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:26:13,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643912818] [2021-11-09 09:26:13,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643912818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:26:13,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842576484] [2021-11-09 09:26:13,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:26:13,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:26:13,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:26:13,431 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:26:13,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-09 09:26:15,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:26:15,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:26:15,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-09 09:26:15,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:26:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4376 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-09 09:26:15,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842576484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:26:15,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:26:15,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-11-09 09:26:15,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025515799] [2021-11-09 09:26:15,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-09 09:26:15,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:26:15,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-09 09:26:15,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 09:26:15,569 INFO L87 Difference]: Start difference. First operand 2530 states and 3472 transitions. Second operand has 66 states, 66 states have (on average 2.1818181818181817) internal successors, (144), 66 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 09:26:17,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:26:17,909 INFO L93 Difference]: Finished difference Result 5229 states and 7009 transitions. [2021-11-09 09:26:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-09 09:26:17,910 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1818181818181817) internal successors, (144), 66 states have internal predecessors, (144), 0 states have call successors, (0), 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 194 [2021-11-09 09:26:17,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:26:17,913 INFO L225 Difference]: With dead ends: 5229 [2021-11-09 09:26:17,913 INFO L226 Difference]: Without dead ends: 2826 [2021-11-09 09:26:17,915 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 09:26:17,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-11-09 09:26:17,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2554. [2021-11-09 09:26:18,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2551 states have (on average 1.3743629949039593) internal successors, (3506), 2553 states have internal predecessors, (3506), 0 states have call successors, (0), 0 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 09:26:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 3506 transitions. [2021-11-09 09:26:18,003 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 3506 transitions. Word has length 194 [2021-11-09 09:26:18,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:26:18,004 INFO L470 AbstractCegarLoop]: Abstraction has 2554 states and 3506 transitions. [2021-11-09 09:26:18,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1818181818181817) internal successors, (144), 66 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 09:26:18,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 3506 transitions. [2021-11-09 09:26:18,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-09 09:26:18,005 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:26:18,005 INFO L513 BasicCegarLoop]: trace histogram [63, 63, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:26:18,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-11-09 09:26:18,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:26:18,206 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:26:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:26:18,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1139706167, now seen corresponding path program 41 times [2021-11-09 09:26:18,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:26:18,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854055669] [2021-11-09 09:26:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:26:18,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:26:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:26:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4501 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-09 09:26:19,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:26:19,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854055669] [2021-11-09 09:26:19,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854055669] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:26:19,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139449626] [2021-11-09 09:26:19,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:26:19,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:26:19,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:26:19,759 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:26:19,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-09 09:28:33,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2021-11-09 09:28:33,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:28:33,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-09 09:28:33,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:28:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4501 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-09 09:28:34,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139449626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:28:34,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:28:34,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2021-11-09 09:28:34,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191194320] [2021-11-09 09:28:34,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-09 09:28:34,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:28:34,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-09 09:28:34,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 09:28:34,020 INFO L87 Difference]: Start difference. First operand 2554 states and 3506 transitions. Second operand has 67 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 67 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 09:28:36,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:28:36,744 INFO L93 Difference]: Finished difference Result 5279 states and 7077 transitions. [2021-11-09 09:28:36,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-09 09:28:36,745 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 67 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 196 [2021-11-09 09:28:36,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:28:36,747 INFO L225 Difference]: With dead ends: 5279 [2021-11-09 09:28:36,747 INFO L226 Difference]: Without dead ends: 2854 [2021-11-09 09:28:36,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 09:28:36,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-11-09 09:28:36,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2578. [2021-11-09 09:28:36,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2575 states have (on average 1.3747572815533982) internal successors, (3540), 2577 states have internal predecessors, (3540), 0 states have call successors, (0), 0 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 09:28:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 3540 transitions. [2021-11-09 09:28:36,845 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 3540 transitions. Word has length 196 [2021-11-09 09:28:36,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:28:36,845 INFO L470 AbstractCegarLoop]: Abstraction has 2578 states and 3540 transitions. [2021-11-09 09:28:36,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 67 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 09:28:36,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 3540 transitions. [2021-11-09 09:28:36,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-09 09:28:36,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:28:36,847 INFO L513 BasicCegarLoop]: trace histogram [64, 64, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:28:36,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-11-09 09:28:37,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-09 09:28:37,048 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:28:37,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:28:37,048 INFO L85 PathProgramCache]: Analyzing trace with hash 511991097, now seen corresponding path program 42 times [2021-11-09 09:28:37,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:28:37,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840306933] [2021-11-09 09:28:37,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:28:37,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:28:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:28:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4628 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-09 09:28:38,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:28:38,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840306933] [2021-11-09 09:28:38,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840306933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:28:38,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162875088] [2021-11-09 09:28:38,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:28:38,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:28:38,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:28:38,733 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:28:38,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-09 09:29:01,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2021-11-09 09:29:01,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:29:01,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 09:29:01,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:29:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4628 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 4096 trivial. 0 not checked. [2021-11-09 09:29:02,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162875088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:02,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:29:02,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 23] total 88 [2021-11-09 09:29:02,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140317531] [2021-11-09 09:29:02,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-09 09:29:02,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:29:02,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-09 09:29:02,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2508, Invalid=5148, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 09:29:02,134 INFO L87 Difference]: Start difference. First operand 2578 states and 3540 transitions. Second operand has 88 states, 88 states have (on average 2.375) internal successors, (209), 88 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 09:29:19,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:29:19,551 INFO L93 Difference]: Finished difference Result 5525 states and 7457 transitions. [2021-11-09 09:29:19,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2021-11-09 09:29:19,552 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.375) internal successors, (209), 88 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) Word has length 198 [2021-11-09 09:29:19,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:29:19,554 INFO L225 Difference]: With dead ends: 5525 [2021-11-09 09:29:19,554 INFO L226 Difference]: Without dead ends: 3078 [2021-11-09 09:29:19,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23562 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=32768, Invalid=55738, Unknown=0, NotChecked=0, Total=88506 [2021-11-09 09:29:19,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-11-09 09:29:19,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2716. [2021-11-09 09:29:19,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2713 states have (on average 1.3730187983781792) internal successors, (3725), 2715 states have internal predecessors, (3725), 0 states have call successors, (0), 0 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 09:29:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3725 transitions. [2021-11-09 09:29:19,658 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3725 transitions. Word has length 198 [2021-11-09 09:29:19,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:29:19,658 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 3725 transitions. [2021-11-09 09:29:19,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.375) internal successors, (209), 88 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 09:29:19,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3725 transitions. [2021-11-09 09:29:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-09 09:29:19,660 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:29:19,660 INFO L513 BasicCegarLoop]: trace histogram [65, 65, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:29:19,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-11-09 09:29:19,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:29:19,862 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:29:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:29:19,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1398713655, now seen corresponding path program 43 times [2021-11-09 09:29:19,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:29:19,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109938543] [2021-11-09 09:29:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:29:19,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:29:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:29:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4815 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-09 09:29:21,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:29:21,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109938543] [2021-11-09 09:29:21,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109938543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:21,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289514164] [2021-11-09 09:29:21,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:29:21,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:29:21,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:29:21,566 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:29:21,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-09 09:29:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:29:23,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-09 09:29:23,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:29:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4815 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-09 09:29:23,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289514164] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:23,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:29:23,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2021-11-09 09:29:23,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308646996] [2021-11-09 09:29:23,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-09 09:29:23,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:29:23,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-09 09:29:23,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-09 09:29:23,957 INFO L87 Difference]: Start difference. First operand 2716 states and 3725 transitions. Second operand has 69 states, 69 states have (on average 2.1739130434782608) internal successors, (150), 69 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:29:26,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:29:26,704 INFO L93 Difference]: Finished difference Result 5607 states and 7515 transitions. [2021-11-09 09:29:26,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-09 09:29:26,704 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1739130434782608) internal successors, (150), 69 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-11-09 09:29:26,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:29:26,707 INFO L225 Difference]: With dead ends: 5607 [2021-11-09 09:29:26,707 INFO L226 Difference]: Without dead ends: 3024 [2021-11-09 09:29:26,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-09 09:29:26,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2021-11-09 09:29:26,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2740. [2021-11-09 09:29:26,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2740 states, 2737 states have (on average 1.3734015345268542) internal successors, (3759), 2739 states have internal predecessors, (3759), 0 states have call successors, (0), 0 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 09:29:26,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2740 states to 2740 states and 3759 transitions. [2021-11-09 09:29:26,806 INFO L78 Accepts]: Start accepts. Automaton has 2740 states and 3759 transitions. Word has length 203 [2021-11-09 09:29:26,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:29:26,806 INFO L470 AbstractCegarLoop]: Abstraction has 2740 states and 3759 transitions. [2021-11-09 09:29:26,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1739130434782608) internal successors, (150), 69 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:29:26,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2740 states and 3759 transitions. [2021-11-09 09:29:26,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-09 09:29:26,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:29:26,807 INFO L513 BasicCegarLoop]: trace histogram [66, 66, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:29:26,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-11-09 09:29:27,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:29:27,008 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:29:27,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:29:27,008 INFO L85 PathProgramCache]: Analyzing trace with hash -111716217, now seen corresponding path program 44 times [2021-11-09 09:29:27,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:29:27,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546650985] [2021-11-09 09:29:27,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:29:27,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:29:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:29:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4946 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-09 09:29:28,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:29:28,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546650985] [2021-11-09 09:29:28,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546650985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:28,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34306432] [2021-11-09 09:29:28,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:29:28,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:29:28,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:29:28,601 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:29:28,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-09 09:29:30,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:29:30,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:29:30,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-09 09:29:30,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:29:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4946 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-09 09:29:31,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34306432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:31,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:29:31,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2021-11-09 09:29:31,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311966115] [2021-11-09 09:29:31,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-09 09:29:31,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:29:31,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-09 09:29:31,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 09:29:31,004 INFO L87 Difference]: Start difference. First operand 2740 states and 3759 transitions. Second operand has 70 states, 70 states have (on average 2.1714285714285713) internal successors, (152), 70 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:29:33,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:29:33,870 INFO L93 Difference]: Finished difference Result 5657 states and 7583 transitions. [2021-11-09 09:29:33,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-09 09:29:33,871 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1714285714285713) internal successors, (152), 70 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-11-09 09:29:33,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:29:33,874 INFO L225 Difference]: With dead ends: 5657 [2021-11-09 09:29:33,874 INFO L226 Difference]: Without dead ends: 3052 [2021-11-09 09:29:33,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 09:29:33,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-11-09 09:29:33,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 2764. [2021-11-09 09:29:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2761 states have (on average 1.3737776168055051) internal successors, (3793), 2763 states have internal predecessors, (3793), 0 states have call successors, (0), 0 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 09:29:33,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 3793 transitions. [2021-11-09 09:29:33,982 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 3793 transitions. Word has length 205 [2021-11-09 09:29:33,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:29:33,982 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 3793 transitions. [2021-11-09 09:29:33,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1714285714285713) internal successors, (152), 70 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:29:33,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 3793 transitions. [2021-11-09 09:29:33,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-09 09:29:33,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:29:33,984 INFO L513 BasicCegarLoop]: trace histogram [67, 67, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:29:34,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-09 09:29:34,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-09 09:29:34,186 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:29:34,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:29:34,186 INFO L85 PathProgramCache]: Analyzing trace with hash -257759547, now seen corresponding path program 45 times [2021-11-09 09:29:34,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:29:34,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642062198] [2021-11-09 09:29:34,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:29:34,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:29:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:29:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5079 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-09 09:29:35,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:29:35,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642062198] [2021-11-09 09:29:35,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642062198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:35,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872319311] [2021-11-09 09:29:35,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:29:35,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:29:35,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:29:35,891 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:29:35,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-09 09:29:39,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-11-09 09:29:39,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:29:39,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 09:29:39,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:29:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5079 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 4489 trivial. 0 not checked. [2021-11-09 09:29:40,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872319311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:40,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:29:40,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 24] total 92 [2021-11-09 09:29:40,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041791606] [2021-11-09 09:29:40,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-09 09:29:40,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:29:40,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-09 09:29:40,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2737, Invalid=5635, Unknown=0, NotChecked=0, Total=8372 [2021-11-09 09:29:40,034 INFO L87 Difference]: Start difference. First operand 2764 states and 3793 transitions. Second operand has 92 states, 92 states have (on average 2.369565217391304) internal successors, (218), 92 states have internal predecessors, (218), 0 states have call successors, (0), 0 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 09:30:01,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:30:01,090 INFO L93 Difference]: Finished difference Result 5913 states and 7979 transitions. [2021-11-09 09:30:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 301 states. [2021-11-09 09:30:01,091 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.369565217391304) internal successors, (218), 92 states have internal predecessors, (218), 0 states have call successors, (0), 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 207 [2021-11-09 09:30:01,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:30:01,093 INFO L225 Difference]: With dead ends: 5913 [2021-11-09 09:30:01,093 INFO L226 Difference]: Without dead ends: 3286 [2021-11-09 09:30:01,097 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28336 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=38409, Invalid=65597, Unknown=0, NotChecked=0, Total=104006 [2021-11-09 09:30:01,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-11-09 09:30:01,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2908. [2021-11-09 09:30:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2908 states, 2905 states have (on average 1.372117039586919) internal successors, (3986), 2907 states have internal predecessors, (3986), 0 states have call successors, (0), 0 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 09:30:01,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 3986 transitions. [2021-11-09 09:30:01,203 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 3986 transitions. Word has length 207 [2021-11-09 09:30:01,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:30:01,203 INFO L470 AbstractCegarLoop]: Abstraction has 2908 states and 3986 transitions. [2021-11-09 09:30:01,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.369565217391304) internal successors, (218), 92 states have internal predecessors, (218), 0 states have call successors, (0), 0 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 09:30:01,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 3986 transitions. [2021-11-09 09:30:01,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-09 09:30:01,204 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:30:01,204 INFO L513 BasicCegarLoop]: trace histogram [68, 68, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:30:01,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-09 09:30:01,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:30:01,405 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:30:01,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:30:01,405 INFO L85 PathProgramCache]: Analyzing trace with hash -730130175, now seen corresponding path program 46 times [2021-11-09 09:30:01,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:30:01,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013836420] [2021-11-09 09:30:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:30:01,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:30:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:30:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5275 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-11-09 09:30:03,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:30:03,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013836420] [2021-11-09 09:30:03,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013836420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:30:03,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93485603] [2021-11-09 09:30:03,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:30:03,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:30:03,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:30:03,091 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:30:03,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-09 09:30:05,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:30:05,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:30:05,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-09 09:30:05,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:30:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5275 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-11-09 09:30:05,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93485603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:30:05,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:30:05,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-11-09 09:30:05,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500564475] [2021-11-09 09:30:05,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-09 09:30:05,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:30:05,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-09 09:30:05,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 09:30:05,654 INFO L87 Difference]: Start difference. First operand 2908 states and 3986 transitions. Second operand has 72 states, 72 states have (on average 2.1666666666666665) internal successors, (156), 72 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:30:08,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:30:08,601 INFO L93 Difference]: Finished difference Result 5997 states and 8037 transitions. [2021-11-09 09:30:08,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-09 09:30:08,602 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.1666666666666665) internal successors, (156), 72 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 212 [2021-11-09 09:30:08,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:30:08,604 INFO L225 Difference]: With dead ends: 5997 [2021-11-09 09:30:08,605 INFO L226 Difference]: Without dead ends: 3228 [2021-11-09 09:30:08,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 09:30:08,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-11-09 09:30:08,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2932. [2021-11-09 09:30:08,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2932 states, 2929 states have (on average 1.3724820757937863) internal successors, (4020), 2931 states have internal predecessors, (4020), 0 states have call successors, (0), 0 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 09:30:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2932 states to 2932 states and 4020 transitions. [2021-11-09 09:30:08,763 INFO L78 Accepts]: Start accepts. Automaton has 2932 states and 4020 transitions. Word has length 212 [2021-11-09 09:30:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:30:08,763 INFO L470 AbstractCegarLoop]: Abstraction has 2932 states and 4020 transitions. [2021-11-09 09:30:08,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.1666666666666665) internal successors, (156), 72 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:30:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2932 states and 4020 transitions. [2021-11-09 09:30:08,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-09 09:30:08,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:30:08,764 INFO L513 BasicCegarLoop]: trace histogram [69, 69, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:30:08,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-09 09:30:08,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-09 09:30:08,964 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:30:08,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:30:08,965 INFO L85 PathProgramCache]: Analyzing trace with hash 842836227, now seen corresponding path program 47 times [2021-11-09 09:30:08,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:30:08,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363880811] [2021-11-09 09:30:08,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:30:08,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:30:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:30:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-11-09 09:30:10,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:30:10,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363880811] [2021-11-09 09:30:10,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363880811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:30:10,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237313923] [2021-11-09 09:30:10,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:30:10,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:30:10,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:30:10,698 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:30:10,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_681eb10b-8852-44e5-82fe-50d5dfd979ea/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process