./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c --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_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/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_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/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_1f38d014-7a66-4c4f-9803-906a08afd77f/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 ae51dc9203c351522c25ee3116b2cda704928bb61769972b6b90792bfdf57f19 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:46:15,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:46:15,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:46:15,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:46:15,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:46:15,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:46:15,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:46:15,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:46:15,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:46:15,782 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:46:15,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:46:15,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:46:15,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:46:15,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:46:15,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:46:15,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:46:15,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:46:15,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:46:15,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:46:15,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:46:15,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:46:15,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:46:15,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:46:15,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:46:15,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:46:15,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:46:15,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:46:15,855 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:46:15,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:46:15,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:46:15,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:46:15,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:46:15,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:46:15,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:46:15,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:46:15,867 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:46:15,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:46:15,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:46:15,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:46:15,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:46:15,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:46:15,872 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:46:15,939 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:46:15,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:46:15,940 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:46:15,941 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:46:15,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:46:15,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:46:15,943 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:46:15,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:46:15,944 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:46:15,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:46:15,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:46:15,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:46:15,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:46:15,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:46:15,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:46:15,947 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:46:15,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:46:15,947 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:46:15,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:46:15,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:46:15,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:46:15,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:46:15,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:46:15,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:46:15,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:46:15,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:46:15,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:46:15,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:46:15,950 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:46:15,953 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:46:15,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:46:15,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:46:15,954 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_1f38d014-7a66-4c4f-9803-906a08afd77f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae51dc9203c351522c25ee3116b2cda704928bb61769972b6b90792bfdf57f19 [2021-11-09 08:46:16,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:46:16,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:46:16,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:46:16,359 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:46:16,360 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:46:16,362 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c [2021-11-09 08:46:16,484 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/data/3d438c357/16840cb4570846f4af6c2baccf02e452/FLAGd7ada1cdc [2021-11-09 08:46:17,041 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:46:17,042 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c [2021-11-09 08:46:17,058 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/data/3d438c357/16840cb4570846f4af6c2baccf02e452/FLAGd7ada1cdc [2021-11-09 08:46:17,385 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/data/3d438c357/16840cb4570846f4af6c2baccf02e452 [2021-11-09 08:46:17,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:46:17,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:46:17,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:46:17,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:46:17,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:46:17,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:46:17" (1/1) ... [2021-11-09 08:46:17,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aea3ce0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:46:17, skipping insertion in model container [2021-11-09 08:46:17,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:46:17" (1/1) ... [2021-11-09 08:46:17,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:46:17,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:46:17,639 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_1f38d014-7a66-4c4f-9803-906a08afd77f/sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c[318,331] [2021-11-09 08:46:17,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:46:17,666 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:46:17,681 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_1f38d014-7a66-4c4f-9803-906a08afd77f/sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c[318,331] [2021-11-09 08:46:17,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:46:17,702 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:46:17,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:46:17 WrapperNode [2021-11-09 08:46:17,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:46:17,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:46:17,705 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:46:17,706 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:46:17,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:46:17" (1/1) ... [2021-11-09 08:46:17,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:46:17" (1/1) ... [2021-11-09 08:46:17,747 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:46:17,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:46:17,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:46:17,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:46:17,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:46:17" (1/1) ... [2021-11-09 08:46:17,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:46:17" (1/1) ... [2021-11-09 08:46:17,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:46:17" (1/1) ... [2021-11-09 08:46:17,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:46:17" (1/1) ... [2021-11-09 08:46:17,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:46:17" (1/1) ... [2021-11-09 08:46:17,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:46:17" (1/1) ... [2021-11-09 08:46:17,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:46:17" (1/1) ... [2021-11-09 08:46:17,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:46:17,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:46:17,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:46:17,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:46:17,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:46:17" (1/1) ... [2021-11-09 08:46:17,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:46:17,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:17,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:46:17,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:46:17,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:46:17,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:46:17,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:46:17,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:46:18,191 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:46:18,192 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-09 08:46:18,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:46:18 BoogieIcfgContainer [2021-11-09 08:46:18,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:46:18,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:46:18,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:46:18,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:46:18,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:46:17" (1/3) ... [2021-11-09 08:46:18,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aaaf3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:46:18, skipping insertion in model container [2021-11-09 08:46:18,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:46:17" (2/3) ... [2021-11-09 08:46:18,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aaaf3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:46:18, skipping insertion in model container [2021-11-09 08:46:18,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:46:18" (3/3) ... [2021-11-09 08:46:18,210 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_7.c [2021-11-09 08:46:18,223 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:46:18,224 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:46:18,304 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:46:18,317 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 08:46:18,318 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:46:18,344 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:18,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 08:46:18,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:18,352 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:18,353 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:18,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:18,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1818421976, now seen corresponding path program 1 times [2021-11-09 08:46:18,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:18,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283116493] [2021-11-09 08:46:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:18,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:46:18,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:18,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283116493] [2021-11-09 08:46:18,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283116493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:46:18,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:46:18,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:46:18,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824230959] [2021-11-09 08:46:18,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 08:46:18,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:18,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 08:46:18,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:46:18,652 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:18,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:18,677 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-11-09 08:46:18,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 08:46:18,679 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-09 08:46:18,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:18,689 INFO L225 Difference]: With dead ends: 22 [2021-11-09 08:46:18,689 INFO L226 Difference]: Without dead ends: 9 [2021-11-09 08:46:18,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:46:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-09 08:46:18,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-09 08:46:18,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:18,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-11-09 08:46:18,738 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2021-11-09 08:46:18,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:18,740 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-11-09 08:46:18,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:18,741 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-11-09 08:46:18,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 08:46:18,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:18,741 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:18,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:46:18,743 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:18,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:18,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1809186766, now seen corresponding path program 1 times [2021-11-09 08:46:18,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:18,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311923401] [2021-11-09 08:46:18,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:18,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:46:18,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:18,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311923401] [2021-11-09 08:46:18,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311923401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:46:18,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:46:18,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:46:18,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254474336] [2021-11-09 08:46:18,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:46:18,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:18,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:46:18,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:46:18,859 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:18,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:18,883 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2021-11-09 08:46:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:46:18,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-09 08:46:18,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:18,885 INFO L225 Difference]: With dead ends: 18 [2021-11-09 08:46:18,885 INFO L226 Difference]: Without dead ends: 11 [2021-11-09 08:46:18,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:46:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-09 08:46:18,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-09 08:46:18,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:18,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-09 08:46:18,890 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2021-11-09 08:46:18,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:18,891 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-09 08:46:18,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:18,891 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-09 08:46:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 08:46:18,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:18,892 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:18,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:46:18,893 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:18,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:18,894 INFO L85 PathProgramCache]: Analyzing trace with hash 576672011, now seen corresponding path program 1 times [2021-11-09 08:46:18,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:18,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71338249] [2021-11-09 08:46:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:18,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:46:18,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:18,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71338249] [2021-11-09 08:46:18,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71338249] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:46:18,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:46:18,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:46:18,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451035473] [2021-11-09 08:46:18,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:46:18,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:18,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:46:18,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:46:18,977 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:18,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:18,999 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-11-09 08:46:18,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:46:19,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-09 08:46:19,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:19,000 INFO L225 Difference]: With dead ends: 16 [2021-11-09 08:46:19,001 INFO L226 Difference]: Without dead ends: 12 [2021-11-09 08:46:19,001 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:46:19,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-09 08:46:19,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-09 08:46:19,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:19,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-09 08:46:19,005 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-11-09 08:46:19,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:19,005 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-09 08:46:19,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:19,006 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-09 08:46:19,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 08:46:19,006 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:19,007 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:19,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:46:19,007 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:19,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:19,008 INFO L85 PathProgramCache]: Analyzing trace with hash 698628545, now seen corresponding path program 1 times [2021-11-09 08:46:19,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:19,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904368928] [2021-11-09 08:46:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:19,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:46:19,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:19,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904368928] [2021-11-09 08:46:19,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904368928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:19,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565809978] [2021-11-09 08:46:19,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:19,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:19,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:19,068 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:19,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:46:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:19,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:46:19,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:46:19,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565809978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:19,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:19,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-09 08:46:19,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096495269] [2021-11-09 08:46:19,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:46:19,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:19,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:46:19,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:46:19,304 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:19,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:19,333 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2021-11-09 08:46:19,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:46:19,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-09 08:46:19,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:19,334 INFO L225 Difference]: With dead ends: 22 [2021-11-09 08:46:19,335 INFO L226 Difference]: Without dead ends: 14 [2021-11-09 08:46:19,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:46:19,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-09 08:46:19,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-09 08:46:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:19,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-09 08:46:19,340 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2021-11-09 08:46:19,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:19,341 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-09 08:46:19,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:19,341 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-09 08:46:19,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 08:46:19,342 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:19,342 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:19,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-09 08:46:19,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:19,562 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:19,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:19,562 INFO L85 PathProgramCache]: Analyzing trace with hash 526975844, now seen corresponding path program 2 times [2021-11-09 08:46:19,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:19,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331659883] [2021-11-09 08:46:19,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:19,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:46:19,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:19,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331659883] [2021-11-09 08:46:19,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331659883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:46:19,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:46:19,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:46:19,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621010530] [2021-11-09 08:46:19,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:46:19,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:19,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:46:19,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:46:19,631 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:19,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:19,666 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-11-09 08:46:19,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:46:19,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-09 08:46:19,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:19,668 INFO L225 Difference]: With dead ends: 22 [2021-11-09 08:46:19,668 INFO L226 Difference]: Without dead ends: 16 [2021-11-09 08:46:19,669 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:46:19,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-09 08:46:19,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-11-09 08:46:19,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 08:46:19,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-09 08:46:19,679 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-11-09 08:46:19,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:19,680 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-09 08:46:19,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-09 08:46:19,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 08:46:19,682 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:19,683 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:19,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:46:19,684 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:19,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:19,687 INFO L85 PathProgramCache]: Analyzing trace with hash 552494793, now seen corresponding path program 1 times [2021-11-09 08:46:19,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:19,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610877570] [2021-11-09 08:46:19,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:19,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:46:19,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:19,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610877570] [2021-11-09 08:46:19,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610877570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:19,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998346348] [2021-11-09 08:46:19,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:19,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:19,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:19,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:19,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:46:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:19,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:46:19,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:46:19,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998346348] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:19,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:19,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-09 08:46:19,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054389919] [2021-11-09 08:46:19,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:46:19,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:19,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:46:19,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:46:19,962 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 08:46:20,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:20,012 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-11-09 08:46:20,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:46:20,016 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 08:46:20,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:20,016 INFO L225 Difference]: With dead ends: 26 [2021-11-09 08:46:20,017 INFO L226 Difference]: Without dead ends: 17 [2021-11-09 08:46:20,017 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:46:20,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-09 08:46:20,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-09 08:46:20,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:20,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-09 08:46:20,023 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2021-11-09 08:46:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:20,023 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-09 08:46:20,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 08:46:20,024 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-09 08:46:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 08:46:20,024 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:20,025 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:20,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:20,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:20,255 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:20,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:20,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1373657364, now seen corresponding path program 2 times [2021-11-09 08:46:20,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:20,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705821127] [2021-11-09 08:46:20,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:20,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:46:20,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:20,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705821127] [2021-11-09 08:46:20,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705821127] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:20,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320136671] [2021-11-09 08:46:20,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:46:20,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:20,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:20,395 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:20,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:46:20,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:46:20,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:20,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:46:20,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:46:20,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320136671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:20,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:20,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-09 08:46:20,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708415385] [2021-11-09 08:46:20,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:46:20,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:20,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:46:20,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:46:20,562 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:20,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:20,598 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-11-09 08:46:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:46:20,599 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-09 08:46:20,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:20,600 INFO L225 Difference]: With dead ends: 28 [2021-11-09 08:46:20,601 INFO L226 Difference]: Without dead ends: 19 [2021-11-09 08:46:20,601 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 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 08:46:20,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-09 08:46:20,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-09 08:46:20,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-09 08:46:20,607 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-11-09 08:46:20,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:20,608 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-09 08:46:20,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:20,608 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-09 08:46:20,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 08:46:20,609 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:20,610 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:20,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:20,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 08:46:20,835 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:20,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:20,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1274975665, now seen corresponding path program 3 times [2021-11-09 08:46:20,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:20,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914654524] [2021-11-09 08:46:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:20,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:46:20,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:20,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914654524] [2021-11-09 08:46:20,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914654524] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:20,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357627850] [2021-11-09 08:46:20,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:46:20,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:20,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:20,933 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:20,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:46:20,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 08:46:20,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:20,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:46:20,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:46:21,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357627850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:21,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:21,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-11-09 08:46:21,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990093229] [2021-11-09 08:46:21,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:46:21,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:21,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:46:21,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:46:21,158 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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 08:46:21,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:21,289 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-11-09 08:46:21,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:46:21,300 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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 18 [2021-11-09 08:46:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:21,301 INFO L225 Difference]: With dead ends: 33 [2021-11-09 08:46:21,304 INFO L226 Difference]: Without dead ends: 24 [2021-11-09 08:46:21,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:46:21,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-09 08:46:21,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-11-09 08:46:21,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-09 08:46:21,313 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 18 [2021-11-09 08:46:21,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:21,314 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-09 08:46:21,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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 08:46:21,314 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-09 08:46:21,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 08:46:21,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:21,318 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:21,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:21,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:21,535 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:21,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:21,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1200989882, now seen corresponding path program 4 times [2021-11-09 08:46:21,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:21,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918337055] [2021-11-09 08:46:21,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:21,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:46:21,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:21,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918337055] [2021-11-09 08:46:21,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918337055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:21,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771443896] [2021-11-09 08:46:21,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:46:21,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:21,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:21,655 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:21,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:46:21,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:46:21,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:21,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:46:21,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:46:21,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771443896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:21,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:21,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-09 08:46:21,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851045708] [2021-11-09 08:46:21,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:46:21,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:21,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:46:21,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:46:21,923 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:21,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:21,969 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-11-09 08:46:21,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:46:21,970 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 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 21 [2021-11-09 08:46:21,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:21,974 INFO L225 Difference]: With dead ends: 34 [2021-11-09 08:46:21,975 INFO L226 Difference]: Without dead ends: 24 [2021-11-09 08:46:21,976 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 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 08:46:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-09 08:46:21,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-09 08:46:21,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-11-09 08:46:21,992 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2021-11-09 08:46:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:21,993 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-11-09 08:46:21,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-11-09 08:46:21,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 08:46:21,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:21,995 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:22,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:22,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:22,209 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:22,209 INFO L85 PathProgramCache]: Analyzing trace with hash 809863479, now seen corresponding path program 5 times [2021-11-09 08:46:22,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:22,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172911582] [2021-11-09 08:46:22,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:22,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:46:22,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:22,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172911582] [2021-11-09 08:46:22,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172911582] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:22,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027912239] [2021-11-09 08:46:22,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:46:22,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:22,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:22,312 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:22,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:46:22,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-09 08:46:22,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:22,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:46:22,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:46:22,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027912239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:22,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:22,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-09 08:46:22,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044231291] [2021-11-09 08:46:22,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:46:22,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:22,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:46:22,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:46:22,506 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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 08:46:22,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:22,547 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-11-09 08:46:22,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:46:22,548 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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 23 [2021-11-09 08:46:22,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:22,549 INFO L225 Difference]: With dead ends: 36 [2021-11-09 08:46:22,549 INFO L226 Difference]: Without dead ends: 26 [2021-11-09 08:46:22,549 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 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 08:46:22,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-09 08:46:22,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-09 08:46:22,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:22,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-11-09 08:46:22,555 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2021-11-09 08:46:22,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:22,555 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-11-09 08:46:22,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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 08:46:22,556 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-11-09 08:46:22,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 08:46:22,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:22,557 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:22,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:22,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 08:46:22,776 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:22,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:22,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1400455052, now seen corresponding path program 6 times [2021-11-09 08:46:22,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:22,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790764400] [2021-11-09 08:46:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:22,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:46:22,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:22,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790764400] [2021-11-09 08:46:22,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790764400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:22,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177519748] [2021-11-09 08:46:22,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:46:22,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:22,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:22,975 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:22,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:46:23,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 08:46:23,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:23,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:46:23,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-09 08:46:23,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177519748] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:23,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:23,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2021-11-09 08:46:23,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298421819] [2021-11-09 08:46:23,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 08:46:23,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:23,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 08:46:23,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:46:23,209 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:23,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:23,370 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-11-09 08:46:23,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:46:23,371 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 08:46:23,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:23,372 INFO L225 Difference]: With dead ends: 41 [2021-11-09 08:46:23,372 INFO L226 Difference]: Without dead ends: 31 [2021-11-09 08:46:23,373 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:46:23,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-09 08:46:23,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-11-09 08:46:23,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:23,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-11-09 08:46:23,378 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2021-11-09 08:46:23,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:23,379 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-11-09 08:46:23,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-11-09 08:46:23,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 08:46:23,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:23,380 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:23,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:23,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:23,607 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:23,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1918510309, now seen corresponding path program 7 times [2021-11-09 08:46:23,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:23,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693527410] [2021-11-09 08:46:23,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:23,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:46:23,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:23,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693527410] [2021-11-09 08:46:23,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693527410] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:23,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028901018] [2021-11-09 08:46:23,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:46:23,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:23,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:23,786 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:23,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:46:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:23,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:46:23,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:46:24,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028901018] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:24,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:24,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-09 08:46:24,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616825591] [2021-11-09 08:46:24,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:46:24,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:24,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:46:24,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:46:24,015 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:24,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:24,071 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-11-09 08:46:24,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:46:24,072 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 28 [2021-11-09 08:46:24,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:24,075 INFO L225 Difference]: With dead ends: 42 [2021-11-09 08:46:24,075 INFO L226 Difference]: Without dead ends: 31 [2021-11-09 08:46:24,076 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:46:24,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-09 08:46:24,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-09 08:46:24,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-09 08:46:24,085 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2021-11-09 08:46:24,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:24,085 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-09 08:46:24,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:24,085 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-09 08:46:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 08:46:24,086 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:24,087 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:24,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-09 08:46:24,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:24,300 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:24,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:24,301 INFO L85 PathProgramCache]: Analyzing trace with hash -727277058, now seen corresponding path program 8 times [2021-11-09 08:46:24,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:24,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259183229] [2021-11-09 08:46:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:24,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:24,426 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:46:24,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:24,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259183229] [2021-11-09 08:46:24,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259183229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:24,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034201498] [2021-11-09 08:46:24,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:46:24,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:24,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:24,429 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:24,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:46:24,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:46:24,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:24,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 08:46:24,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:46:24,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034201498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:24,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:24,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-09 08:46:24,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397215506] [2021-11-09 08:46:24,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:46:24,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:24,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:46:24,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:46:24,704 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:24,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:24,760 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-11-09 08:46:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:46:24,761 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 30 [2021-11-09 08:46:24,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:24,763 INFO L225 Difference]: With dead ends: 44 [2021-11-09 08:46:24,763 INFO L226 Difference]: Without dead ends: 33 [2021-11-09 08:46:24,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 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 08:46:24,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-09 08:46:24,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-09 08:46:24,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 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 08:46:24,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-11-09 08:46:24,780 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2021-11-09 08:46:24,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:24,780 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-11-09 08:46:24,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:24,781 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-11-09 08:46:24,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 08:46:24,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:24,782 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:24,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:24,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:24,983 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:24,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:24,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1586576417, now seen corresponding path program 9 times [2021-11-09 08:46:24,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:24,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012954437] [2021-11-09 08:46:24,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:24,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:46:25,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:25,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012954437] [2021-11-09 08:46:25,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012954437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:25,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606108861] [2021-11-09 08:46:25,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:46:25,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:25,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:25,196 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:25,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:46:25,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:46:25,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:25,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:46:25,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-09 08:46:25,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606108861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:25,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:25,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2021-11-09 08:46:25,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627834228] [2021-11-09 08:46:25,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:46:25,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:25,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:46:25,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:46:25,518 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:25,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:25,774 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-11-09 08:46:25,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:46:25,775 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-09 08:46:25,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:25,776 INFO L225 Difference]: With dead ends: 49 [2021-11-09 08:46:25,776 INFO L226 Difference]: Without dead ends: 38 [2021-11-09 08:46:25,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=285, Invalid=527, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:46:25,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-09 08:46:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-11-09 08:46:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-11-09 08:46:25,787 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2021-11-09 08:46:25,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:25,791 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-11-09 08:46:25,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:25,791 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-11-09 08:46:25,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 08:46:25,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:25,796 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:25,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:26,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 08:46:26,011 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:26,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:26,012 INFO L85 PathProgramCache]: Analyzing trace with hash -275333016, now seen corresponding path program 10 times [2021-11-09 08:46:26,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:26,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705393283] [2021-11-09 08:46:26,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:26,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 08:46:26,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:26,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705393283] [2021-11-09 08:46:26,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705393283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:26,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378674201] [2021-11-09 08:46:26,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:46:26,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:26,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:26,178 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:26,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:46:26,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:46:26,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:26,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:46:26,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 08:46:26,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378674201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:26,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:26,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-09 08:46:26,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313568563] [2021-11-09 08:46:26,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 08:46:26,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:26,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 08:46:26,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:46:26,474 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 08:46:26,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:26,522 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-11-09 08:46:26,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:46:26,523 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 35 [2021-11-09 08:46:26,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:26,524 INFO L225 Difference]: With dead ends: 50 [2021-11-09 08:46:26,524 INFO L226 Difference]: Without dead ends: 38 [2021-11-09 08:46:26,524 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 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 08:46:26,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-09 08:46:26,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-09 08:46:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-11-09 08:46:26,530 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2021-11-09 08:46:26,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:26,530 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-11-09 08:46:26,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 08:46:26,531 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-11-09 08:46:26,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 08:46:26,532 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:26,532 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:26,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:26,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 08:46:26,754 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:26,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:26,754 INFO L85 PathProgramCache]: Analyzing trace with hash 234226725, now seen corresponding path program 11 times [2021-11-09 08:46:26,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:26,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202760662] [2021-11-09 08:46:26,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:26,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 08:46:26,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:26,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202760662] [2021-11-09 08:46:26,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202760662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:26,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902360614] [2021-11-09 08:46:26,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:46:26,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:26,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:26,939 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:26,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:46:27,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-09 08:46:27,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:27,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:46:27,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 08:46:27,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902360614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:27,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:27,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-09 08:46:27,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162013848] [2021-11-09 08:46:27,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:46:27,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:27,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:46:27,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:46:27,288 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 08:46:27,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:27,339 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-11-09 08:46:27,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 08:46:27,342 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 37 [2021-11-09 08:46:27,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:27,342 INFO L225 Difference]: With dead ends: 52 [2021-11-09 08:46:27,342 INFO L226 Difference]: Without dead ends: 40 [2021-11-09 08:46:27,343 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:46:27,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-09 08:46:27,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-09 08:46:27,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:27,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-11-09 08:46:27,348 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2021-11-09 08:46:27,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:27,348 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-11-09 08:46:27,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 08:46:27,349 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-11-09 08:46:27,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 08:46:27,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:27,350 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:27,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:27,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 08:46:27,566 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:27,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:27,567 INFO L85 PathProgramCache]: Analyzing trace with hash 294866082, now seen corresponding path program 12 times [2021-11-09 08:46:27,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:27,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830902862] [2021-11-09 08:46:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:27,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 08:46:27,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:27,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830902862] [2021-11-09 08:46:27,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830902862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:27,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117351328] [2021-11-09 08:46:27,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:46:27,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:27,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:27,750 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:27,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:46:27,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 08:46:27,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:27,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:46:27,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-09 08:46:28,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117351328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:28,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:28,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2021-11-09 08:46:28,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834014952] [2021-11-09 08:46:28,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:46:28,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:28,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:46:28,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:46:28,105 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:28,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:28,369 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-11-09 08:46:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 08:46:28,371 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-09 08:46:28,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:28,371 INFO L225 Difference]: With dead ends: 57 [2021-11-09 08:46:28,372 INFO L226 Difference]: Without dead ends: 45 [2021-11-09 08:46:28,373 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=441, Invalid=819, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:46:28,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-09 08:46:28,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-11-09 08:46:28,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-11-09 08:46:28,380 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 39 [2021-11-09 08:46:28,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:28,381 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-11-09 08:46:28,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:28,381 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-11-09 08:46:28,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 08:46:28,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:28,388 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:28,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:28,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 08:46:28,591 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:28,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:28,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1121567891, now seen corresponding path program 13 times [2021-11-09 08:46:28,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:28,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393919296] [2021-11-09 08:46:28,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:28,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 08:46:28,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:28,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393919296] [2021-11-09 08:46:28,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393919296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:28,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660631838] [2021-11-09 08:46:28,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:46:28,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:28,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:28,784 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:28,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 08:46:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:28,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:46:28,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 08:46:29,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660631838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:29,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:29,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-09 08:46:29,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228900507] [2021-11-09 08:46:29,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:46:29,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:29,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:46:29,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:46:29,154 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:29,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:29,220 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-11-09 08:46:29,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 08:46:29,221 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 42 [2021-11-09 08:46:29,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:29,222 INFO L225 Difference]: With dead ends: 58 [2021-11-09 08:46:29,222 INFO L226 Difference]: Without dead ends: 45 [2021-11-09 08:46:29,223 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:46:29,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-09 08:46:29,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-09 08:46:29,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 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 08:46:29,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-11-09 08:46:29,229 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2021-11-09 08:46:29,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:29,231 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-11-09 08:46:29,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:29,232 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-11-09 08:46:29,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 08:46:29,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:29,233 INFO L513 BasicCegarLoop]: trace histogram [16, 15, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:29,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:29,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 08:46:29,446 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:29,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:29,447 INFO L85 PathProgramCache]: Analyzing trace with hash 635681040, now seen corresponding path program 14 times [2021-11-09 08:46:29,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:29,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025162862] [2021-11-09 08:46:29,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:29,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 08:46:29,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:29,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025162862] [2021-11-09 08:46:29,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025162862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:29,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228222060] [2021-11-09 08:46:29,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:46:29,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:29,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:29,685 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:29,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 08:46:29,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:46:29,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:29,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 08:46:29,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 08:46:30,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228222060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:30,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:30,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-09 08:46:30,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389348353] [2021-11-09 08:46:30,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:46:30,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:30,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:46:30,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:46:30,068 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 08:46:30,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:30,128 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-11-09 08:46:30,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:46:30,129 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 44 [2021-11-09 08:46:30,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:30,130 INFO L225 Difference]: With dead ends: 60 [2021-11-09 08:46:30,130 INFO L226 Difference]: Without dead ends: 47 [2021-11-09 08:46:30,131 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 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 08:46:30,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-09 08:46:30,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-09 08:46:30,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 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 08:46:30,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-11-09 08:46:30,137 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2021-11-09 08:46:30,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:30,138 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-11-09 08:46:30,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 08:46:30,138 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-11-09 08:46:30,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 08:46:30,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:30,140 INFO L513 BasicCegarLoop]: trace histogram [17, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:30,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:30,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:30,362 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:30,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:30,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1429756403, now seen corresponding path program 15 times [2021-11-09 08:46:30,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:30,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375506793] [2021-11-09 08:46:30,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:30,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 08:46:30,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:30,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375506793] [2021-11-09 08:46:30,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375506793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:30,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986625289] [2021-11-09 08:46:30,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:46:30,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:30,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:30,607 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:30,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 08:46:30,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:46:30,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:30,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:46:30,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-11-09 08:46:31,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986625289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:31,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:31,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4] total 21 [2021-11-09 08:46:31,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122061617] [2021-11-09 08:46:31,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:46:31,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:31,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:46:31,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:46:31,033 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 08:46:31,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:31,127 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2021-11-09 08:46:31,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 08:46:31,128 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 46 [2021-11-09 08:46:31,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:31,130 INFO L225 Difference]: With dead ends: 65 [2021-11-09 08:46:31,130 INFO L226 Difference]: Without dead ends: 52 [2021-11-09 08:46:31,131 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:46:31,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-09 08:46:31,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-11-09 08:46:31,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:31,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2021-11-09 08:46:31,147 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 46 [2021-11-09 08:46:31,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:31,147 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2021-11-09 08:46:31,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 08:46:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2021-11-09 08:46:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 08:46:31,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:31,149 INFO L513 BasicCegarLoop]: trace histogram [19, 17, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:31,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:31,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:31,370 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:31,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:31,371 INFO L85 PathProgramCache]: Analyzing trace with hash 527553147, now seen corresponding path program 16 times [2021-11-09 08:46:31,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:31,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672359175] [2021-11-09 08:46:31,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:31,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:46:31,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:31,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672359175] [2021-11-09 08:46:31,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672359175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:31,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414035958] [2021-11-09 08:46:31,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:46:31,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:31,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:31,681 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:31,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 08:46:31,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:46:31,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:31,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 08:46:31,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:46:32,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414035958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:32,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:32,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-09 08:46:32,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065327946] [2021-11-09 08:46:32,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:46:32,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:32,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:46:32,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:46:32,094 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 08:46:32,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:32,159 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-11-09 08:46:32,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 08:46:32,160 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 50 [2021-11-09 08:46:32,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:32,161 INFO L225 Difference]: With dead ends: 68 [2021-11-09 08:46:32,161 INFO L226 Difference]: Without dead ends: 53 [2021-11-09 08:46:32,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 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 08:46:32,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-09 08:46:32,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-09 08:46:32,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:32,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-11-09 08:46:32,171 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 50 [2021-11-09 08:46:32,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:32,172 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-11-09 08:46:32,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 08:46:32,172 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-11-09 08:46:32,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 08:46:32,173 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:32,174 INFO L513 BasicCegarLoop]: trace histogram [20, 18, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:32,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:32,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:32,387 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:32,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:32,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1291123998, now seen corresponding path program 17 times [2021-11-09 08:46:32,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:32,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251454759] [2021-11-09 08:46:32,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:32,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:46:32,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:32,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251454759] [2021-11-09 08:46:32,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251454759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:32,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326514952] [2021-11-09 08:46:32,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:46:32,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:32,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:32,667 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:32,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 08:46:32,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-11-09 08:46:32,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:32,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 08:46:32,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:46:33,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326514952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:33,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:33,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-09 08:46:33,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734193373] [2021-11-09 08:46:33,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:46:33,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:33,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:46:33,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:46:33,171 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:33,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:33,260 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2021-11-09 08:46:33,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 08:46:33,261 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-09 08:46:33,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:33,262 INFO L225 Difference]: With dead ends: 70 [2021-11-09 08:46:33,262 INFO L226 Difference]: Without dead ends: 55 [2021-11-09 08:46:33,263 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:46:33,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-09 08:46:33,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-09 08:46:33,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:33,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-11-09 08:46:33,269 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 52 [2021-11-09 08:46:33,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:33,270 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-11-09 08:46:33,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:33,271 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-11-09 08:46:33,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 08:46:33,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:33,272 INFO L513 BasicCegarLoop]: trace histogram [21, 19, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:33,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:33,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 08:46:33,488 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:33,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:33,489 INFO L85 PathProgramCache]: Analyzing trace with hash 643304193, now seen corresponding path program 18 times [2021-11-09 08:46:33,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:33,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256527493] [2021-11-09 08:46:33,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:33,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:46:33,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:33,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256527493] [2021-11-09 08:46:33,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256527493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:33,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997003191] [2021-11-09 08:46:33,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:46:33,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:33,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:33,797 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:33,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 08:46:34,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 08:46:34,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:34,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 08:46:34,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 61 proven. 15 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-11-09 08:46:34,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997003191] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:34,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:34,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2021-11-09 08:46:34,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228943703] [2021-11-09 08:46:34,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 08:46:34,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:34,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 08:46:34,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:46:34,437 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:34,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:34,927 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2021-11-09 08:46:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:46:34,927 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-09 08:46:34,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:34,928 INFO L225 Difference]: With dead ends: 79 [2021-11-09 08:46:34,928 INFO L226 Difference]: Without dead ends: 64 [2021-11-09 08:46:34,930 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=806, Invalid=1546, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 08:46:34,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-09 08:46:34,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2021-11-09 08:46:34,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 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 08:46:34,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2021-11-09 08:46:34,935 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 54 [2021-11-09 08:46:34,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:34,936 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2021-11-09 08:46:34,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:34,936 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2021-11-09 08:46:34,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 08:46:34,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:34,937 INFO L513 BasicCegarLoop]: trace histogram [22, 20, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:34,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:35,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:35,160 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash 852476360, now seen corresponding path program 19 times [2021-11-09 08:46:35,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:35,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076358841] [2021-11-09 08:46:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:35,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 08:46:35,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:35,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076358841] [2021-11-09 08:46:35,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076358841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:35,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130223915] [2021-11-09 08:46:35,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:46:35,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:35,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:35,527 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:35,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 08:46:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:35,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 08:46:35,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 08:46:36,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130223915] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:36,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:36,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-09 08:46:36,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688709700] [2021-11-09 08:46:36,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 08:46:36,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:36,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 08:46:36,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:46:36,096 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:36,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:36,197 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2021-11-09 08:46:36,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:46:36,198 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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 57 [2021-11-09 08:46:36,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:36,199 INFO L225 Difference]: With dead ends: 76 [2021-11-09 08:46:36,199 INFO L226 Difference]: Without dead ends: 60 [2021-11-09 08:46:36,203 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:46:36,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-09 08:46:36,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-09 08:46:36,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:36,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-11-09 08:46:36,210 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 57 [2021-11-09 08:46:36,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:36,211 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-11-09 08:46:36,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:36,211 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-11-09 08:46:36,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 08:46:36,215 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:36,215 INFO L513 BasicCegarLoop]: trace histogram [23, 21, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:36,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:36,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 08:46:36,443 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:36,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:36,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1906895301, now seen corresponding path program 20 times [2021-11-09 08:46:36,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:36,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118791216] [2021-11-09 08:46:36,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:36,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 08:46:36,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:36,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118791216] [2021-11-09 08:46:36,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118791216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:36,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311975230] [2021-11-09 08:46:36,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:46:36,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:36,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:36,761 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:36,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 08:46:37,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:46:37,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:37,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 08:46:37,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 08:46:37,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311975230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:37,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:37,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-09 08:46:37,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618591929] [2021-11-09 08:46:37,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 08:46:37,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:37,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 08:46:37,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-09 08:46:37,284 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:37,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:37,356 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-11-09 08:46:37,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 08:46:37,356 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-09 08:46:37,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:37,357 INFO L225 Difference]: With dead ends: 78 [2021-11-09 08:46:37,358 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 08:46:37,358 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 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 08:46:37,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 08:46:37,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-09 08:46:37,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 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 08:46:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-11-09 08:46:37,364 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 59 [2021-11-09 08:46:37,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:37,365 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-11-09 08:46:37,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:37,365 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2021-11-09 08:46:37,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 08:46:37,366 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:37,366 INFO L513 BasicCegarLoop]: trace histogram [24, 22, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:37,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:37,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 08:46:37,579 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:37,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:37,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1591215746, now seen corresponding path program 21 times [2021-11-09 08:46:37,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:37,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725297637] [2021-11-09 08:46:37,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:37,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 69 proven. 506 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 08:46:37,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:37,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725297637] [2021-11-09 08:46:37,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725297637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:37,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414493910] [2021-11-09 08:46:37,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:46:37,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:37,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:37,947 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:37,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 08:46:38,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:46:38,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:38,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:46:38,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 70 proven. 21 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-09 08:46:38,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414493910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:38,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:38,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10] total 33 [2021-11-09 08:46:38,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390497094] [2021-11-09 08:46:38,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 08:46:38,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:38,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 08:46:38,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 08:46:38,681 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:39,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:39,219 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2021-11-09 08:46:39,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 08:46:39,221 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 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 61 [2021-11-09 08:46:39,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:39,222 INFO L225 Difference]: With dead ends: 87 [2021-11-09 08:46:39,222 INFO L226 Difference]: Without dead ends: 71 [2021-11-09 08:46:39,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1057, Invalid=2023, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 08:46:39,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-09 08:46:39,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2021-11-09 08:46:39,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:39,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-11-09 08:46:39,229 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 61 [2021-11-09 08:46:39,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:39,230 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-11-09 08:46:39,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:39,231 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-11-09 08:46:39,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 08:46:39,232 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:39,232 INFO L513 BasicCegarLoop]: trace histogram [25, 23, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:39,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:39,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:39,433 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:39,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:39,433 INFO L85 PathProgramCache]: Analyzing trace with hash -641498803, now seen corresponding path program 22 times [2021-11-09 08:46:39,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:39,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378325854] [2021-11-09 08:46:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:39,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-09 08:46:39,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:39,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378325854] [2021-11-09 08:46:39,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378325854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:39,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663359622] [2021-11-09 08:46:39,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:46:39,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:39,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:39,811 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:39,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 08:46:40,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:46:40,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:40,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 08:46:40,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-09 08:46:40,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663359622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:40,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:40,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-09 08:46:40,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650062048] [2021-11-09 08:46:40,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 08:46:40,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:40,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 08:46:40,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:46:40,353 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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 08:46:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:40,452 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-11-09 08:46:40,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:46:40,453 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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 64 [2021-11-09 08:46:40,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:40,454 INFO L225 Difference]: With dead ends: 84 [2021-11-09 08:46:40,455 INFO L226 Difference]: Without dead ends: 67 [2021-11-09 08:46:40,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:46:40,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-09 08:46:40,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-11-09 08:46:40,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:40,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-11-09 08:46:40,461 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 64 [2021-11-09 08:46:40,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:40,462 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-11-09 08:46:40,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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 08:46:40,463 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-11-09 08:46:40,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 08:46:40,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:40,464 INFO L513 BasicCegarLoop]: trace histogram [26, 24, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:40,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:40,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:40,682 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:40,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:40,683 INFO L85 PathProgramCache]: Analyzing trace with hash -601238864, now seen corresponding path program 23 times [2021-11-09 08:46:40,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:40,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313468995] [2021-11-09 08:46:40,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:40,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-09 08:46:41,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:41,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313468995] [2021-11-09 08:46:41,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313468995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:41,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006069799] [2021-11-09 08:46:41,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:46:41,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:41,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:41,131 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:41,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 08:46:41,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2021-11-09 08:46:41,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:41,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 08:46:41,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:41,707 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-09 08:46:41,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006069799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:41,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:41,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-09 08:46:41,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567077987] [2021-11-09 08:46:41,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 08:46:41,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:41,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 08:46:41,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-09 08:46:41,711 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:41,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:41,798 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-11-09 08:46:41,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 08:46:41,799 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-09 08:46:41,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:41,802 INFO L225 Difference]: With dead ends: 86 [2021-11-09 08:46:41,802 INFO L226 Difference]: Without dead ends: 69 [2021-11-09 08:46:41,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-09 08:46:41,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-09 08:46:41,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-09 08:46:41,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 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 08:46:41,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-11-09 08:46:41,821 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 66 [2021-11-09 08:46:41,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:41,821 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-11-09 08:46:41,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-11-09 08:46:41,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-09 08:46:41,824 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:41,824 INFO L513 BasicCegarLoop]: trace histogram [27, 25, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:41,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:42,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 08:46:42,039 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:42,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:42,040 INFO L85 PathProgramCache]: Analyzing trace with hash -566143149, now seen corresponding path program 24 times [2021-11-09 08:46:42,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:42,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38565238] [2021-11-09 08:46:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:42,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-09 08:46:42,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:42,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38565238] [2021-11-09 08:46:42,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38565238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:42,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345353021] [2021-11-09 08:46:42,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:46:42,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:42,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:42,448 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:42,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 08:46:42,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-09 08:46:42,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:42,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 08:46:42,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 79 proven. 28 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-09 08:46:43,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345353021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:43,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:43,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11] total 37 [2021-11-09 08:46:43,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726440151] [2021-11-09 08:46:43,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 08:46:43,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:43,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 08:46:43,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=900, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 08:46:43,385 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:43,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:43,987 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-11-09 08:46:43,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 08:46:43,988 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-09 08:46:43,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:43,989 INFO L225 Difference]: With dead ends: 95 [2021-11-09 08:46:43,989 INFO L226 Difference]: Without dead ends: 78 [2021-11-09 08:46:43,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1342, Invalid=2564, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 08:46:43,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-09 08:46:43,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-11-09 08:46:43,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:43,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2021-11-09 08:46:43,997 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 68 [2021-11-09 08:46:43,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:43,997 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2021-11-09 08:46:43,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:43,998 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2021-11-09 08:46:43,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 08:46:43,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:43,999 INFO L513 BasicCegarLoop]: trace histogram [28, 26, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:44,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:44,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 08:46:44,215 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:44,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:44,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1490489590, now seen corresponding path program 25 times [2021-11-09 08:46:44,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:44,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763648139] [2021-11-09 08:46:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:44,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-09 08:46:44,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:44,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763648139] [2021-11-09 08:46:44,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763648139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:44,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100207563] [2021-11-09 08:46:44,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:46:44,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:44,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:44,675 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:44,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 08:46:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:45,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 08:46:45,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-09 08:46:45,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100207563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:45,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:45,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-09 08:46:45,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498577527] [2021-11-09 08:46:45,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 08:46:45,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:45,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 08:46:45,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:46:45,378 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:45,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:45,469 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2021-11-09 08:46:45,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:46:45,469 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 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 08:46:45,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:45,470 INFO L225 Difference]: With dead ends: 92 [2021-11-09 08:46:45,470 INFO L226 Difference]: Without dead ends: 74 [2021-11-09 08:46:45,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:46:45,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-09 08:46:45,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-09 08:46:45,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:45,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-11-09 08:46:45,478 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 71 [2021-11-09 08:46:45,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:45,478 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-11-09 08:46:45,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:45,479 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-11-09 08:46:45,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-09 08:46:45,480 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:45,480 INFO L513 BasicCegarLoop]: trace histogram [29, 27, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:45,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:45,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:45,707 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:45,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:45,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1660418611, now seen corresponding path program 26 times [2021-11-09 08:46:45,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:45,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557837662] [2021-11-09 08:46:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:45,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-09 08:46:46,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:46,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557837662] [2021-11-09 08:46:46,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557837662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:46,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28310328] [2021-11-09 08:46:46,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:46:46,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:46,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:46,219 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:46,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 08:46:46,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:46:46,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:46,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 08:46:46,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-09 08:46:47,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28310328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:47,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:47,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-09 08:46:47,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706627150] [2021-11-09 08:46:47,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 08:46:47,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:47,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 08:46:47,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:46:47,104 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:47,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:47,235 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2021-11-09 08:46:47,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 08:46:47,236 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-09 08:46:47,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:47,237 INFO L225 Difference]: With dead ends: 94 [2021-11-09 08:46:47,238 INFO L226 Difference]: Without dead ends: 76 [2021-11-09 08:46:47,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:46:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-09 08:46:47,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-09 08:46:47,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:47,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2021-11-09 08:46:47,246 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 73 [2021-11-09 08:46:47,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:47,247 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2021-11-09 08:46:47,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2021-11-09 08:46:47,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 08:46:47,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:47,248 INFO L513 BasicCegarLoop]: trace histogram [30, 28, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:47,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:47,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-09 08:46:47,475 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:47,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:47,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1753450544, now seen corresponding path program 27 times [2021-11-09 08:46:47,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:47,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407177168] [2021-11-09 08:46:47,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:47,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 87 proven. 812 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-09 08:46:47,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:47,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407177168] [2021-11-09 08:46:47,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407177168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:47,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42771811] [2021-11-09 08:46:47,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:46:47,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:47,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:48,001 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:48,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 08:46:48,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 08:46:48,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:48,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 08:46:48,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:48,840 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 88 proven. 36 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-11-09 08:46:48,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42771811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:48,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:48,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2021-11-09 08:46:48,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066518394] [2021-11-09 08:46:48,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 08:46:48,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:48,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 08:46:48,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1110, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 08:46:48,843 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 41 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 08:46:49,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:49,571 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-11-09 08:46:49,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 08:46:49,572 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 41 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 75 [2021-11-09 08:46:49,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:49,573 INFO L225 Difference]: With dead ends: 103 [2021-11-09 08:46:49,573 INFO L226 Difference]: Without dead ends: 85 [2021-11-09 08:46:49,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1661, Invalid=3169, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 08:46:49,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-09 08:46:49,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2021-11-09 08:46:49,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:49,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-11-09 08:46:49,580 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 75 [2021-11-09 08:46:49,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:49,580 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-11-09 08:46:49,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 41 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 08:46:49,581 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-11-09 08:46:49,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 08:46:49,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:49,582 INFO L513 BasicCegarLoop]: trace histogram [31, 29, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:49,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:49,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-09 08:46:49,807 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:49,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:49,808 INFO L85 PathProgramCache]: Analyzing trace with hash -215532513, now seen corresponding path program 28 times [2021-11-09 08:46:49,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:49,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390109261] [2021-11-09 08:46:49,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:49,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 08:46:50,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:50,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390109261] [2021-11-09 08:46:50,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390109261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:50,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689834455] [2021-11-09 08:46:50,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:46:50,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:50,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:50,403 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:50,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 08:46:51,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:46:51,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:51,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 08:46:51,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 08:46:51,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689834455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:51,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:51,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-11-09 08:46:51,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598116264] [2021-11-09 08:46:51,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 08:46:51,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:51,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 08:46:51,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 08:46:51,378 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:51,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:51,471 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-11-09 08:46:51,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 08:46:51,472 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-09 08:46:51,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:51,473 INFO L225 Difference]: With dead ends: 100 [2021-11-09 08:46:51,473 INFO L226 Difference]: Without dead ends: 81 [2021-11-09 08:46:51,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 08:46:51,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-09 08:46:51,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-09 08:46:51,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.05) internal successors, (84), 80 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 08:46:51,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-11-09 08:46:51,481 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 78 [2021-11-09 08:46:51,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:51,481 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-11-09 08:46:51,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:51,482 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-11-09 08:46:51,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 08:46:51,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:51,483 INFO L513 BasicCegarLoop]: trace histogram [32, 30, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:51,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-09 08:46:51,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:51,696 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:51,697 INFO L85 PathProgramCache]: Analyzing trace with hash -142220222, now seen corresponding path program 29 times [2021-11-09 08:46:51,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:51,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339474252] [2021-11-09 08:46:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:51,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:52,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 08:46:52,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:52,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339474252] [2021-11-09 08:46:52,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339474252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:52,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470194987] [2021-11-09 08:46:52,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:46:52,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:52,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:52,256 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:52,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 08:46:52,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2021-11-09 08:46:52,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:52,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 08:46:52,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 08:46:53,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470194987] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:53,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:53,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-11-09 08:46:53,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705091895] [2021-11-09 08:46:53,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 08:46:53,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:53,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 08:46:53,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 08:46:53,120 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:53,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:53,236 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2021-11-09 08:46:53,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 08:46:53,237 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 08:46:53,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:53,238 INFO L225 Difference]: With dead ends: 102 [2021-11-09 08:46:53,238 INFO L226 Difference]: Without dead ends: 83 [2021-11-09 08:46:53,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 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 08:46:53,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-09 08:46:53,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-09 08:46:53,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:53,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2021-11-09 08:46:53,246 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 80 [2021-11-09 08:46:53,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:53,246 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2021-11-09 08:46:53,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:53,247 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2021-11-09 08:46:53,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 08:46:53,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:53,248 INFO L513 BasicCegarLoop]: trace histogram [33, 31, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:53,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:53,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 08:46:53,463 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:53,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:53,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1591414693, now seen corresponding path program 30 times [2021-11-09 08:46:53,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:53,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474646861] [2021-11-09 08:46:53,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:53,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 96 proven. 992 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 08:46:54,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:54,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474646861] [2021-11-09 08:46:54,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474646861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:54,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218491088] [2021-11-09 08:46:54,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:46:54,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:54,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:54,109 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:54,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 08:46:54,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-09 08:46:54,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:54,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:46:54,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 97 proven. 45 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2021-11-09 08:46:55,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218491088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:55,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:55,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 13] total 45 [2021-11-09 08:46:55,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931236906] [2021-11-09 08:46:55,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-09 08:46:55,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:55,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-09 08:46:55,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=1342, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 08:46:55,258 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:55,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:55,977 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2021-11-09 08:46:55,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 08:46:55,977 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-09 08:46:55,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:55,978 INFO L225 Difference]: With dead ends: 111 [2021-11-09 08:46:55,978 INFO L226 Difference]: Without dead ends: 92 [2021-11-09 08:46:55,981 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2014, Invalid=3838, Unknown=0, NotChecked=0, Total=5852 [2021-11-09 08:46:55,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-09 08:46:55,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2021-11-09 08:46:55,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:55,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2021-11-09 08:46:55,986 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 82 [2021-11-09 08:46:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:55,987 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2021-11-09 08:46:55,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:55,987 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2021-11-09 08:46:55,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 08:46:55,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:55,988 INFO L513 BasicCegarLoop]: trace histogram [34, 32, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:56,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:56,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:56,188 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:56,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:56,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1826898980, now seen corresponding path program 31 times [2021-11-09 08:46:56,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:56,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812022862] [2021-11-09 08:46:56,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:56,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1211 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-09 08:46:56,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:56,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812022862] [2021-11-09 08:46:56,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812022862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:56,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950419652] [2021-11-09 08:46:56,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:46:56,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:56,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:56,885 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:56,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 08:46:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:57,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 08:46:57,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1211 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-09 08:46:57,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950419652] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:57,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:57,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-09 08:46:57,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265194148] [2021-11-09 08:46:57,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 08:46:57,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:57,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 08:46:57,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:46:57,893 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:58,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:58,014 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2021-11-09 08:46:58,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 08:46:58,015 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 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 85 [2021-11-09 08:46:58,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:58,016 INFO L225 Difference]: With dead ends: 108 [2021-11-09 08:46:58,017 INFO L226 Difference]: Without dead ends: 88 [2021-11-09 08:46:58,018 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:46:58,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-09 08:46:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-09 08:46:58,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:58,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2021-11-09 08:46:58,026 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 85 [2021-11-09 08:46:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:58,026 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2021-11-09 08:46:58,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:58,027 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2021-11-09 08:46:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-09 08:46:58,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:58,028 INFO L513 BasicCegarLoop]: trace histogram [35, 33, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:58,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:58,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 08:46:58,243 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:58,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:58,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1543618209, now seen corresponding path program 32 times [2021-11-09 08:46:58,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:58,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340065772] [2021-11-09 08:46:58,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:58,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-09 08:46:58,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:58,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340065772] [2021-11-09 08:46:58,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340065772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:58,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338343888] [2021-11-09 08:46:58,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:46:58,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:58,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:58,857 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:58,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 08:46:59,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:46:59,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:59,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 08:46:59,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-09 08:46:59,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338343888] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:59,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:59,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-11-09 08:46:59,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327800940] [2021-11-09 08:46:59,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 08:46:59,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:59,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 08:46:59,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 08:46:59,741 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:59,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:59,850 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2021-11-09 08:46:59,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 08:46:59,850 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 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 87 [2021-11-09 08:46:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:59,851 INFO L225 Difference]: With dead ends: 110 [2021-11-09 08:46:59,851 INFO L226 Difference]: Without dead ends: 90 [2021-11-09 08:46:59,852 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 87 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 08:46:59,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-09 08:46:59,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-09 08:46:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:59,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2021-11-09 08:46:59,859 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 87 [2021-11-09 08:46:59,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:59,860 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2021-11-09 08:46:59,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:59,860 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2021-11-09 08:46:59,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-09 08:46:59,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:59,861 INFO L513 BasicCegarLoop]: trace histogram [36, 34, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:59,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 08:47:00,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-09 08:47:00,067 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:00,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:00,068 INFO L85 PathProgramCache]: Analyzing trace with hash -106263074, now seen corresponding path program 33 times [2021-11-09 08:47:00,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:00,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711829351] [2021-11-09 08:47:00,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:00,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 105 proven. 1190 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-09 08:47:00,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:00,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711829351] [2021-11-09 08:47:00,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711829351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:00,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718574989] [2021-11-09 08:47:00,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:47:00,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:00,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:00,751 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:00,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 08:47:01,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 08:47:01,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:01,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:47:01,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 170 proven. 4 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2021-11-09 08:47:01,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718574989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:01,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:01,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 5] total 40 [2021-11-09 08:47:01,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013629966] [2021-11-09 08:47:01,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 08:47:01,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:01,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 08:47:01,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 08:47:01,714 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:01,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:01,851 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2021-11-09 08:47:01,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 08:47:01,852 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-09 08:47:01,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:01,853 INFO L225 Difference]: With dead ends: 115 [2021-11-09 08:47:01,853 INFO L226 Difference]: Without dead ends: 95 [2021-11-09 08:47:01,854 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 08:47:01,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-09 08:47:01,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-11-09 08:47:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.053763440860215) internal successors, (98), 93 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 08:47:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2021-11-09 08:47:01,862 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 89 [2021-11-09 08:47:01,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:01,863 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2021-11-09 08:47:01,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:01,863 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2021-11-09 08:47:01,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-09 08:47:01,864 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:01,864 INFO L513 BasicCegarLoop]: trace histogram [38, 35, 10, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:01,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-09 08:47:02,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 08:47:02,075 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:02,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:02,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1851451562, now seen corresponding path program 34 times [2021-11-09 08:47:02,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:02,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904609281] [2021-11-09 08:47:02,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:02,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 180 proven. 1260 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-09 08:47:02,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:02,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904609281] [2021-11-09 08:47:02,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904609281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:02,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215354] [2021-11-09 08:47:02,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:47:02,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:02,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:02,764 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:02,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 08:47:03,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:47:03,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:03,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 08:47:03,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 180 proven. 1260 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-09 08:47:03,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215354] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:03,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:03,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-11-09 08:47:03,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579245730] [2021-11-09 08:47:03,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 08:47:03,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:03,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 08:47:03,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 08:47:03,796 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:03,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:03,928 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2021-11-09 08:47:03,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 08:47:03,929 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-09 08:47:03,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:03,930 INFO L225 Difference]: With dead ends: 118 [2021-11-09 08:47:03,930 INFO L226 Difference]: Without dead ends: 96 [2021-11-09 08:47:03,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 93 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 08:47:03,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-09 08:47:03,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-11-09 08:47:03,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:03,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-11-09 08:47:03,940 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 93 [2021-11-09 08:47:03,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:03,940 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-11-09 08:47:03,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:03,941 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-11-09 08:47:03,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-09 08:47:03,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:03,942 INFO L513 BasicCegarLoop]: trace histogram [39, 36, 10, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:03,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 08:47:04,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 08:47:04,143 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:04,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:04,144 INFO L85 PathProgramCache]: Analyzing trace with hash 370328787, now seen corresponding path program 35 times [2021-11-09 08:47:04,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:04,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972791946] [2021-11-09 08:47:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:04,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 185 proven. 1332 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-09 08:47:04,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:04,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972791946] [2021-11-09 08:47:04,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972791946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:04,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860265464] [2021-11-09 08:47:04,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:47:04,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:04,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:04,904 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:04,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 08:47:05,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-11-09 08:47:05,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:05,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 08:47:05,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 185 proven. 1332 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-09 08:47:05,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860265464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:05,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:05,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-11-09 08:47:05,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660050252] [2021-11-09 08:47:05,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 08:47:05,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:05,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 08:47:05,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 08:47:05,956 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:06,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:06,056 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2021-11-09 08:47:06,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 08:47:06,056 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-09 08:47:06,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:06,057 INFO L225 Difference]: With dead ends: 120 [2021-11-09 08:47:06,057 INFO L226 Difference]: Without dead ends: 98 [2021-11-09 08:47:06,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 08:47:06,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-09 08:47:06,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-09 08:47:06,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:06,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-11-09 08:47:06,065 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 95 [2021-11-09 08:47:06,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:06,065 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-11-09 08:47:06,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:06,066 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-11-09 08:47:06,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-09 08:47:06,067 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:06,067 INFO L513 BasicCegarLoop]: trace histogram [40, 37, 10, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:06,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 08:47:06,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 08:47:06,271 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:06,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:06,272 INFO L85 PathProgramCache]: Analyzing trace with hash 902498064, now seen corresponding path program 36 times [2021-11-09 08:47:06,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:06,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457782924] [2021-11-09 08:47:06,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:06,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 190 proven. 1406 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-09 08:47:07,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:07,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457782924] [2021-11-09 08:47:07,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457782924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:07,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644821776] [2021-11-09 08:47:07,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:47:07,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:07,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:07,151 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:07,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 08:47:07,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-09 08:47:07,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:07,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 08:47:07,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 194 proven. 55 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2021-11-09 08:47:08,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644821776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:08,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:08,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 15] total 53 [2021-11-09 08:47:08,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599867040] [2021-11-09 08:47:08,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-09 08:47:08,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:08,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-09 08:47:08,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=884, Invalid=1872, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 08:47:08,471 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 53 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:09,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:09,480 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2021-11-09 08:47:09,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-09 08:47:09,481 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 53 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 97 [2021-11-09 08:47:09,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:09,482 INFO L225 Difference]: With dead ends: 135 [2021-11-09 08:47:09,482 INFO L226 Difference]: Without dead ends: 113 [2021-11-09 08:47:09,483 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2784, Invalid=5406, Unknown=0, NotChecked=0, Total=8190 [2021-11-09 08:47:09,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-09 08:47:09,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2021-11-09 08:47:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.05) internal successors, (105), 100 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:09,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2021-11-09 08:47:09,491 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 97 [2021-11-09 08:47:09,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:09,492 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2021-11-09 08:47:09,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:09,492 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2021-11-09 08:47:09,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-09 08:47:09,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:09,493 INFO L513 BasicCegarLoop]: trace histogram [41, 38, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:09,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-09 08:47:09,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:09,707 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:09,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:09,708 INFO L85 PathProgramCache]: Analyzing trace with hash -955024129, now seen corresponding path program 37 times [2021-11-09 08:47:09,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:09,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135054078] [2021-11-09 08:47:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:09,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 195 proven. 1482 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 08:47:10,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:10,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135054078] [2021-11-09 08:47:10,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135054078] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:10,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394130808] [2021-11-09 08:47:10,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:47:10,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:10,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:10,449 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:10,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 08:47:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:11,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 08:47:11,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 195 proven. 1482 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 08:47:11,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394130808] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:11,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:11,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-09 08:47:11,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073961496] [2021-11-09 08:47:11,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 08:47:11,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:11,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 08:47:11,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 08:47:11,567 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:11,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:11,689 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2021-11-09 08:47:11,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 08:47:11,689 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 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 08:47:11,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:11,691 INFO L225 Difference]: With dead ends: 126 [2021-11-09 08:47:11,691 INFO L226 Difference]: Without dead ends: 103 [2021-11-09 08:47:11,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 08:47:11,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-09 08:47:11,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-09 08:47:11,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 102 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2021-11-09 08:47:11,700 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 100 [2021-11-09 08:47:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:11,701 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2021-11-09 08:47:11,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:11,702 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2021-11-09 08:47:11,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-09 08:47:11,703 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:11,703 INFO L513 BasicCegarLoop]: trace histogram [42, 39, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:11,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 08:47:11,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:11,907 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:11,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:11,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1035200286, now seen corresponding path program 38 times [2021-11-09 08:47:11,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:11,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675229180] [2021-11-09 08:47:11,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:11,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 200 proven. 1560 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 08:47:12,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:12,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675229180] [2021-11-09 08:47:12,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675229180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:12,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809437738] [2021-11-09 08:47:12,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:47:12,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:12,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:12,787 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:12,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 08:47:13,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:47:13,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:13,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 08:47:13,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 200 proven. 1560 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 08:47:13,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809437738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:13,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:13,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-11-09 08:47:13,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393657047] [2021-11-09 08:47:13,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 08:47:13,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:13,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 08:47:13,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 08:47:13,919 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:14,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:14,028 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2021-11-09 08:47:14,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 08:47:14,029 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-09 08:47:14,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:14,030 INFO L225 Difference]: With dead ends: 128 [2021-11-09 08:47:14,030 INFO L226 Difference]: Without dead ends: 105 [2021-11-09 08:47:14,030 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 08:47:14,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-09 08:47:14,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-11-09 08:47:14,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0480769230769231) internal successors, (109), 104 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:14,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-11-09 08:47:14,037 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 102 [2021-11-09 08:47:14,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:14,038 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-11-09 08:47:14,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:14,038 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-11-09 08:47:14,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-09 08:47:14,039 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:14,040 INFO L513 BasicCegarLoop]: trace histogram [43, 40, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:14,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-09 08:47:14,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:14,267 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:14,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:14,267 INFO L85 PathProgramCache]: Analyzing trace with hash -775075835, now seen corresponding path program 39 times [2021-11-09 08:47:14,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:14,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047130486] [2021-11-09 08:47:14,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:14,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1915 backedges. 205 proven. 1640 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 08:47:15,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:15,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047130486] [2021-11-09 08:47:15,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047130486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:15,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287132392] [2021-11-09 08:47:15,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:47:15,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:15,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:15,147 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:15,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 08:47:15,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 08:47:15,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:15,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:47:15,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1915 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-11-09 08:47:16,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287132392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:16,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:16,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 16] total 57 [2021-11-09 08:47:16,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497157490] [2021-11-09 08:47:16,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-09 08:47:16,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:16,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-09 08:47:16,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1022, Invalid=2170, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 08:47:16,761 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 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 08:47:17,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:17,936 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2021-11-09 08:47:17,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-09 08:47:17,937 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 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 104 [2021-11-09 08:47:17,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:17,938 INFO L225 Difference]: With dead ends: 143 [2021-11-09 08:47:17,938 INFO L226 Difference]: Without dead ends: 120 [2021-11-09 08:47:17,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3236, Invalid=6270, Unknown=0, NotChecked=0, Total=9506 [2021-11-09 08:47:17,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-09 08:47:17,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2021-11-09 08:47:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 107 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 08:47:17,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-11-09 08:47:17,945 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 104 [2021-11-09 08:47:17,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:17,945 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-11-09 08:47:17,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 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 08:47:17,945 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-11-09 08:47:17,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-09 08:47:17,946 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:17,947 INFO L513 BasicCegarLoop]: trace histogram [44, 41, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:17,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-09 08:47:18,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-09 08:47:18,151 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:18,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:18,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1304331260, now seen corresponding path program 40 times [2021-11-09 08:47:18,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:18,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220221153] [2021-11-09 08:47:18,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:18,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2014 backedges. 210 proven. 1722 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-09 08:47:19,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:19,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220221153] [2021-11-09 08:47:19,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220221153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:19,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135975746] [2021-11-09 08:47:19,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:47:19,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:19,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:19,061 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:19,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 08:47:19,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:47:19,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:19,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 08:47:19,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2014 backedges. 210 proven. 1722 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-09 08:47:20,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135975746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:20,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:20,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-11-09 08:47:20,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528837737] [2021-11-09 08:47:20,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-09 08:47:20,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:20,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-09 08:47:20,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 08:47:20,305 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:20,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:20,429 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2021-11-09 08:47:20,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 08:47:20,430 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 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 08:47:20,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:20,431 INFO L225 Difference]: With dead ends: 134 [2021-11-09 08:47:20,431 INFO L226 Difference]: Without dead ends: 110 [2021-11-09 08:47:20,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 08:47:20,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-09 08:47:20,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-11-09 08:47:20,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 109 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:20,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-11-09 08:47:20,438 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 107 [2021-11-09 08:47:20,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:20,438 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-11-09 08:47:20,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:20,439 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-11-09 08:47:20,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-09 08:47:20,440 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:20,440 INFO L513 BasicCegarLoop]: trace histogram [45, 42, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:20,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-09 08:47:20,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:20,651 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:20,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:20,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1696642367, now seen corresponding path program 41 times [2021-11-09 08:47:20,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:20,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854614654] [2021-11-09 08:47:20,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:20,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 215 proven. 1806 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-09 08:47:21,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:21,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854614654] [2021-11-09 08:47:21,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854614654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:21,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427076945] [2021-11-09 08:47:21,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:47:21,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:21,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:21,686 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:21,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 08:47:22,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-11-09 08:47:22,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:22,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-09 08:47:22,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 215 proven. 1806 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-09 08:47:23,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427076945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:23,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:23,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-11-09 08:47:23,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113110541] [2021-11-09 08:47:23,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 08:47:23,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:23,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 08:47:23,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 08:47:23,027 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:23,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:23,160 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2021-11-09 08:47:23,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 08:47:23,161 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-09 08:47:23,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:23,162 INFO L225 Difference]: With dead ends: 136 [2021-11-09 08:47:23,163 INFO L226 Difference]: Without dead ends: 112 [2021-11-09 08:47:23,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 08:47:23,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-09 08:47:23,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-11-09 08:47:23,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.045045045045045) internal successors, (116), 111 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:23,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2021-11-09 08:47:23,180 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 109 [2021-11-09 08:47:23,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:23,181 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2021-11-09 08:47:23,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:23,181 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2021-11-09 08:47:23,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-09 08:47:23,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:23,183 INFO L513 BasicCegarLoop]: trace histogram [46, 43, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:23,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-09 08:47:23,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-09 08:47:23,407 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:23,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:23,408 INFO L85 PathProgramCache]: Analyzing trace with hash -750494146, now seen corresponding path program 42 times [2021-11-09 08:47:23,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:23,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563143788] [2021-11-09 08:47:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:23,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2194 backedges. 220 proven. 1892 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-09 08:47:24,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:24,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563143788] [2021-11-09 08:47:24,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563143788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:24,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338121119] [2021-11-09 08:47:24,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:47:24,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:24,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:24,403 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:24,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 08:47:25,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-09 08:47:25,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:25,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 08:47:25,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2194 backedges. 224 proven. 78 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2021-11-09 08:47:26,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338121119] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:26,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:26,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 17] total 61 [2021-11-09 08:47:26,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317357391] [2021-11-09 08:47:26,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-09 08:47:26,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:26,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-09 08:47:26,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1170, Invalid=2490, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 08:47:26,114 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 61 states, 61 states have (on average 1.9672131147540983) internal successors, (120), 61 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 08:47:27,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:27,368 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2021-11-09 08:47:27,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-09 08:47:27,368 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9672131147540983) internal successors, (120), 61 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 111 [2021-11-09 08:47:27,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:27,369 INFO L225 Difference]: With dead ends: 151 [2021-11-09 08:47:27,369 INFO L226 Difference]: Without dead ends: 127 [2021-11-09 08:47:27,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3722, Invalid=7198, Unknown=0, NotChecked=0, Total=10920 [2021-11-09 08:47:27,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-09 08:47:27,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-11-09 08:47:27,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.043859649122807) internal successors, (119), 114 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:27,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2021-11-09 08:47:27,382 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 111 [2021-11-09 08:47:27,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:27,382 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2021-11-09 08:47:27,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9672131147540983) internal successors, (120), 61 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 08:47:27,383 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2021-11-09 08:47:27,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-09 08:47:27,384 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:27,384 INFO L513 BasicCegarLoop]: trace histogram [47, 44, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:27,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-09 08:47:27,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-09 08:47:27,599 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:27,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:27,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1337438801, now seen corresponding path program 43 times [2021-11-09 08:47:27,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:27,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357804611] [2021-11-09 08:47:27,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:27,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 225 proven. 1980 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-09 08:47:28,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:28,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357804611] [2021-11-09 08:47:28,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357804611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:28,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643437645] [2021-11-09 08:47:28,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:47:28,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:28,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:28,824 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:28,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 08:47:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:29,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 08:47:29,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 225 proven. 1980 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-09 08:47:30,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643437645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:30,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:30,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-11-09 08:47:30,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895131338] [2021-11-09 08:47:30,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-09 08:47:30,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:30,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-09 08:47:30,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 08:47:30,227 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 48 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:30,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:30,379 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2021-11-09 08:47:30,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 08:47:30,380 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 48 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-09 08:47:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:30,381 INFO L225 Difference]: With dead ends: 142 [2021-11-09 08:47:30,381 INFO L226 Difference]: Without dead ends: 117 [2021-11-09 08:47:30,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 08:47:30,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-09 08:47:30,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-09 08:47:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.043103448275862) internal successors, (121), 116 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 08:47:30,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2021-11-09 08:47:30,393 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 114 [2021-11-09 08:47:30,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:30,393 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2021-11-09 08:47:30,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 48 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:30,394 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2021-11-09 08:47:30,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-09 08:47:30,395 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:30,395 INFO L513 BasicCegarLoop]: trace histogram [48, 45, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:30,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-09 08:47:30,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-09 08:47:30,615 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:30,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:30,616 INFO L85 PathProgramCache]: Analyzing trace with hash -808172300, now seen corresponding path program 44 times [2021-11-09 08:47:30,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:30,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194098089] [2021-11-09 08:47:30,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:30,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 230 proven. 2070 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-09 08:47:31,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:31,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194098089] [2021-11-09 08:47:31,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194098089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:31,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893433539] [2021-11-09 08:47:31,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:47:31,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:31,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:31,840 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:31,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 08:47:32,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:47:32,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:32,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 08:47:32,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 230 proven. 2070 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-09 08:47:33,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893433539] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:33,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:33,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-11-09 08:47:33,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641889579] [2021-11-09 08:47:33,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 08:47:33,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:33,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 08:47:33,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 08:47:33,177 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:33,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:33,321 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2021-11-09 08:47:33,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-09 08:47:33,322 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-09 08:47:33,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:33,323 INFO L225 Difference]: With dead ends: 144 [2021-11-09 08:47:33,323 INFO L226 Difference]: Without dead ends: 119 [2021-11-09 08:47:33,324 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 08:47:33,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-09 08:47:33,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-11-09 08:47:33,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0423728813559323) internal successors, (123), 118 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:33,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2021-11-09 08:47:33,334 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 116 [2021-11-09 08:47:33,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:33,335 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2021-11-09 08:47:33,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2021-11-09 08:47:33,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-09 08:47:33,336 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:33,336 INFO L513 BasicCegarLoop]: trace histogram [49, 46, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:33,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-09 08:47:33,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-09 08:47:33,555 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:33,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:33,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1156138281, now seen corresponding path program 45 times [2021-11-09 08:47:33,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:33,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902387697] [2021-11-09 08:47:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:33,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 235 proven. 2162 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-09 08:47:34,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:34,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902387697] [2021-11-09 08:47:34,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902387697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:34,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046105543] [2021-11-09 08:47:34,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:47:34,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:34,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:34,722 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:34,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 08:47:35,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 08:47:35,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:35,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 08:47:35,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 239 proven. 91 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2021-11-09 08:47:36,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046105543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:36,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:36,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 18] total 65 [2021-11-09 08:47:36,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273865985] [2021-11-09 08:47:36,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-09 08:47:36,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:36,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-09 08:47:36,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=2832, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 08:47:36,355 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 65 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 65 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:37,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:37,638 INFO L93 Difference]: Finished difference Result 159 states and 175 transitions. [2021-11-09 08:47:37,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-09 08:47:37,638 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 65 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-09 08:47:37,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:37,639 INFO L225 Difference]: With dead ends: 159 [2021-11-09 08:47:37,639 INFO L226 Difference]: Without dead ends: 134 [2021-11-09 08:47:37,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4242, Invalid=8190, Unknown=0, NotChecked=0, Total=12432 [2021-11-09 08:47:37,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-09 08:47:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2021-11-09 08:47:37,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 121 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 08:47:37,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2021-11-09 08:47:37,652 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 118 [2021-11-09 08:47:37,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:37,653 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2021-11-09 08:47:37,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 65 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:37,653 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2021-11-09 08:47:37,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-09 08:47:37,654 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:37,654 INFO L513 BasicCegarLoop]: trace histogram [50, 47, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:37,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-09 08:47:37,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-09 08:47:37,867 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:37,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:37,867 INFO L85 PathProgramCache]: Analyzing trace with hash 317629618, now seen corresponding path program 46 times [2021-11-09 08:47:37,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:37,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103163322] [2021-11-09 08:47:37,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:37,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2605 backedges. 240 proven. 2256 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-09 08:47:39,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:39,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103163322] [2021-11-09 08:47:39,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103163322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:39,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467998109] [2021-11-09 08:47:39,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:47:39,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:39,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:39,007 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:39,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-09 08:47:39,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:47:39,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:39,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 08:47:39,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2605 backedges. 240 proven. 2256 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-09 08:47:40,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467998109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:40,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:40,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-11-09 08:47:40,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466205876] [2021-11-09 08:47:40,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-09 08:47:40,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:40,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-09 08:47:40,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 08:47:40,260 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 51 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:40,364 INFO L93 Difference]: Finished difference Result 150 states and 159 transitions. [2021-11-09 08:47:40,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-09 08:47:40,365 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 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 121 [2021-11-09 08:47:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:40,366 INFO L225 Difference]: With dead ends: 150 [2021-11-09 08:47:40,366 INFO L226 Difference]: Without dead ends: 124 [2021-11-09 08:47:40,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 08:47:40,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-09 08:47:40,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-11-09 08:47:40,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 123 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 08:47:40,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2021-11-09 08:47:40,375 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 121 [2021-11-09 08:47:40,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:40,376 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2021-11-09 08:47:40,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:40,376 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2021-11-09 08:47:40,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-09 08:47:40,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:40,377 INFO L513 BasicCegarLoop]: trace histogram [51, 48, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:40,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-09 08:47:40,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-09 08:47:40,603 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:40,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:40,604 INFO L85 PathProgramCache]: Analyzing trace with hash 189359279, now seen corresponding path program 47 times [2021-11-09 08:47:40,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:40,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232123038] [2021-11-09 08:47:40,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:40,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 245 proven. 2352 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-09 08:47:41,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:41,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232123038] [2021-11-09 08:47:41,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232123038] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:41,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116130968] [2021-11-09 08:47:41,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:47:41,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:41,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:41,680 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:41,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-09 08:47:42,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2021-11-09 08:47:42,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:42,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 08:47:42,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 245 proven. 2352 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-09 08:47:43,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116130968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:43,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:43,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-11-09 08:47:43,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173639615] [2021-11-09 08:47:43,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-09 08:47:43,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:43,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-09 08:47:43,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 08:47:43,113 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:43,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:43,272 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2021-11-09 08:47:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-09 08:47:43,273 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-09 08:47:43,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:43,274 INFO L225 Difference]: With dead ends: 152 [2021-11-09 08:47:43,275 INFO L226 Difference]: Without dead ends: 126 [2021-11-09 08:47:43,275 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 08:47:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-09 08:47:43,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-11-09 08:47:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:43,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2021-11-09 08:47:43,285 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2021-11-09 08:47:43,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:43,286 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2021-11-09 08:47:43,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:43,287 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2021-11-09 08:47:43,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-09 08:47:43,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:43,288 INFO L513 BasicCegarLoop]: trace histogram [52, 49, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:43,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-09 08:47:43,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:43,511 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:43,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:43,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1475615084, now seen corresponding path program 48 times [2021-11-09 08:47:43,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:43,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774685690] [2021-11-09 08:47:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:43,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 250 proven. 2450 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-09 08:47:44,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:44,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774685690] [2021-11-09 08:47:44,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774685690] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:44,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103087813] [2021-11-09 08:47:44,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:47:44,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:44,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:44,860 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:44,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-09 08:47:45,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-09 08:47:45,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:45,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 08:47:45,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 254 proven. 105 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2021-11-09 08:47:46,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103087813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:46,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:46,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 19] total 69 [2021-11-09 08:47:46,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267777473] [2021-11-09 08:47:46,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-09 08:47:46,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:46,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-09 08:47:46,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1496, Invalid=3196, Unknown=0, NotChecked=0, Total=4692 [2021-11-09 08:47:46,760 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 69 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 08:47:48,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:48,457 INFO L93 Difference]: Finished difference Result 167 states and 183 transitions. [2021-11-09 08:47:48,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-09 08:47:48,458 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 69 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 125 [2021-11-09 08:47:48,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:48,459 INFO L225 Difference]: With dead ends: 167 [2021-11-09 08:47:48,459 INFO L226 Difference]: Without dead ends: 141 [2021-11-09 08:47:48,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2236 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4796, Invalid=9246, Unknown=0, NotChecked=0, Total=14042 [2021-11-09 08:47:48,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-09 08:47:48,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2021-11-09 08:47:48,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0390625) internal successors, (133), 128 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:48,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2021-11-09 08:47:48,471 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 125 [2021-11-09 08:47:48,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:48,471 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2021-11-09 08:47:48,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 69 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 08:47:48,472 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2021-11-09 08:47:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-09 08:47:48,473 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:48,473 INFO L513 BasicCegarLoop]: trace histogram [53, 50, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:48,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-11-09 08:47:48,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-09 08:47:48,699 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:48,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:48,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1944531875, now seen corresponding path program 49 times [2021-11-09 08:47:48,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:48,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050581498] [2021-11-09 08:47:48,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:48,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 255 proven. 2550 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-09 08:47:49,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:49,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050581498] [2021-11-09 08:47:49,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050581498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:49,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050088167] [2021-11-09 08:47:49,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:47:49,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:49,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:49,974 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:49,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-09 08:47:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:51,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-09 08:47:51,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 255 proven. 2550 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-09 08:47:51,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050088167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:51,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:51,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-11-09 08:47:51,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617222046] [2021-11-09 08:47:51,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-09 08:47:51,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:51,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-09 08:47:51,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 08:47:51,567 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:51,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:51,778 INFO L93 Difference]: Finished difference Result 158 states and 167 transitions. [2021-11-09 08:47:51,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-09 08:47:51,779 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-09 08:47:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:51,781 INFO L225 Difference]: With dead ends: 158 [2021-11-09 08:47:51,781 INFO L226 Difference]: Without dead ends: 131 [2021-11-09 08:47:51,782 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 08:47:51,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-09 08:47:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-11-09 08:47:51,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0384615384615385) internal successors, (135), 130 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2021-11-09 08:47:51,794 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 128 [2021-11-09 08:47:51,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:51,794 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2021-11-09 08:47:51,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:51,795 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2021-11-09 08:47:51,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-09 08:47:51,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:51,796 INFO L513 BasicCegarLoop]: trace histogram [54, 51, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:51,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-09 08:47:52,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-09 08:47:52,014 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:52,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:52,014 INFO L85 PathProgramCache]: Analyzing trace with hash -330240762, now seen corresponding path program 50 times [2021-11-09 08:47:52,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:52,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635576861] [2021-11-09 08:47:52,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:52,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 260 proven. 2652 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-09 08:47:53,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:53,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635576861] [2021-11-09 08:47:53,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635576861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:53,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483461596] [2021-11-09 08:47:53,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:47:53,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:53,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:53,401 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:53,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-09 08:47:54,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:47:54,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:54,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-09 08:47:54,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:55,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 260 proven. 2652 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-09 08:47:55,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483461596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:55,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:55,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-11-09 08:47:55,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39695910] [2021-11-09 08:47:55,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-09 08:47:55,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:55,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-09 08:47:55,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 08:47:55,149 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:55,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:55,303 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2021-11-09 08:47:55,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-09 08:47:55,303 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-09 08:47:55,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:55,308 INFO L225 Difference]: With dead ends: 160 [2021-11-09 08:47:55,308 INFO L226 Difference]: Without dead ends: 133 [2021-11-09 08:47:55,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 08:47:55,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-09 08:47:55,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-09 08:47:55,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0378787878787878) internal successors, (137), 132 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:55,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2021-11-09 08:47:55,322 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 130 [2021-11-09 08:47:55,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:55,322 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2021-11-09 08:47:55,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:55,323 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2021-11-09 08:47:55,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-09 08:47:55,324 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:55,324 INFO L513 BasicCegarLoop]: trace histogram [55, 52, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:55,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-09 08:47:55,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:55,543 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:55,544 INFO L85 PathProgramCache]: Analyzing trace with hash -248391255, now seen corresponding path program 51 times [2021-11-09 08:47:55,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:55,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435575215] [2021-11-09 08:47:55,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:55,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:56,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3145 backedges. 265 proven. 2756 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-09 08:47:56,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:56,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435575215] [2021-11-09 08:47:56,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435575215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:56,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592538003] [2021-11-09 08:47:56,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:47:56,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:56,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:56,896 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:56,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-09 08:47:58,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 08:47:58,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:58,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:47:58,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3145 backedges. 364 proven. 9 refuted. 0 times theorem prover too weak. 2772 trivial. 0 not checked. [2021-11-09 08:47:58,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592538003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:58,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:58,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 6] total 59 [2021-11-09 08:47:58,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201995833] [2021-11-09 08:47:58,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-09 08:47:58,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-09 08:47:58,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 08:47:58,722 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:59,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:59,021 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2021-11-09 08:47:59,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-09 08:47:59,021 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-09 08:47:59,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:59,023 INFO L225 Difference]: With dead ends: 165 [2021-11-09 08:47:59,023 INFO L226 Difference]: Without dead ends: 138 [2021-11-09 08:47:59,024 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 08:47:59,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-09 08:47:59,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-11-09 08:47:59,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0441176470588236) internal successors, (142), 136 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 08:47:59,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 142 transitions. [2021-11-09 08:47:59,036 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 142 transitions. Word has length 132 [2021-11-09 08:47:59,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:59,036 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 142 transitions. [2021-11-09 08:47:59,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:59,037 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 142 transitions. [2021-11-09 08:47:59,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-09 08:47:59,038 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:59,038 INFO L513 BasicCegarLoop]: trace histogram [57, 53, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:59,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-09 08:47:59,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-09 08:47:59,254 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:59,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:59,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1336946225, now seen corresponding path program 52 times [2021-11-09 08:47:59,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:59,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274920836] [2021-11-09 08:47:59,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:59,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:00,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3369 backedges. 378 proven. 2862 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-09 08:48:00,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:48:00,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274920836] [2021-11-09 08:48:00,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274920836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:00,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807421845] [2021-11-09 08:48:00,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:48:00,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:00,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:48:00,925 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:48:00,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-09 08:48:02,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:48:02,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:48:02,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 08:48:02,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:48:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3369 backedges. 378 proven. 2862 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-09 08:48:02,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807421845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:02,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:48:02,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-11-09 08:48:02,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219995877] [2021-11-09 08:48:02,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-09 08:48:02,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:48:02,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-09 08:48:02,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 08:48:02,797 INFO L87 Difference]: Start difference. First operand 137 states and 142 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 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 08:48:02,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:48:02,948 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2021-11-09 08:48:02,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-09 08:48:02,949 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 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) Word has length 136 [2021-11-09 08:48:02,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:48:02,950 INFO L225 Difference]: With dead ends: 168 [2021-11-09 08:48:02,950 INFO L226 Difference]: Without dead ends: 139 [2021-11-09 08:48:02,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 08:48:02,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-09 08:48:02,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-11-09 08:48:02,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0434782608695652) internal successors, (144), 138 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 08:48:02,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-11-09 08:48:02,959 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 136 [2021-11-09 08:48:02,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:48:02,959 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-11-09 08:48:02,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 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 08:48:02,960 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-11-09 08:48:02,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-09 08:48:02,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:48:02,961 INFO L513 BasicCegarLoop]: trace histogram [58, 54, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:48:03,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-09 08:48:03,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-09 08:48:03,180 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:48:03,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:48:03,180 INFO L85 PathProgramCache]: Analyzing trace with hash 432526484, now seen corresponding path program 53 times [2021-11-09 08:48:03,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:48:03,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170803588] [2021-11-09 08:48:03,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:48:03,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:48:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 385 proven. 2970 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-09 08:48:04,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:48:04,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170803588] [2021-11-09 08:48:04,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170803588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:04,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558765705] [2021-11-09 08:48:04,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:48:04,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:04,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:48:04,599 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:48:04,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-09 08:48:06,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 59 check-sat command(s) [2021-11-09 08:48:06,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:48:06,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-09 08:48:06,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:48:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 385 proven. 2970 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-09 08:48:06,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558765705] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:06,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:48:06,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-11-09 08:48:06,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778634126] [2021-11-09 08:48:06,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-09 08:48:06,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:48:06,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-09 08:48:06,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 08:48:06,580 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:06,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:48:06,722 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2021-11-09 08:48:06,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-09 08:48:06,723 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-09 08:48:06,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:48:06,724 INFO L225 Difference]: With dead ends: 170 [2021-11-09 08:48:06,725 INFO L226 Difference]: Without dead ends: 141 [2021-11-09 08:48:06,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 08:48:06,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-09 08:48:06,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-11-09 08:48:06,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.042857142857143) internal successors, (146), 140 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 08:48:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2021-11-09 08:48:06,738 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 138 [2021-11-09 08:48:06,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:48:06,739 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2021-11-09 08:48:06,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:06,740 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2021-11-09 08:48:06,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-09 08:48:06,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:48:06,741 INFO L513 BasicCegarLoop]: trace histogram [59, 55, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:48:06,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-09 08:48:06,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:06,958 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:48:06,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:48:06,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1131450825, now seen corresponding path program 54 times [2021-11-09 08:48:06,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:48:06,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613407000] [2021-11-09 08:48:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:48:06,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:48:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 392 proven. 3080 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-09 08:48:08,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:48:08,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613407000] [2021-11-09 08:48:08,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613407000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:08,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340604291] [2021-11-09 08:48:08,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:48:08,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:08,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:48:08,478 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:48:08,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-09 08:48:10,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-09 08:48:10,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:48:10,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 08:48:10,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:48:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 401 proven. 120 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2021-11-09 08:48:10,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340604291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:10,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:48:10,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 20] total 76 [2021-11-09 08:48:10,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069523518] [2021-11-09 08:48:10,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-09 08:48:10,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:48:10,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-09 08:48:10,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1842, Invalid=3858, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 08:48:10,990 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:13,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:48:13,027 INFO L93 Difference]: Finished difference Result 193 states and 215 transitions. [2021-11-09 08:48:13,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-09 08:48:13,028 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-11-09 08:48:13,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:48:13,030 INFO L225 Difference]: With dead ends: 193 [2021-11-09 08:48:13,030 INFO L226 Difference]: Without dead ends: 164 [2021-11-09 08:48:13,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2802 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5874, Invalid=11418, Unknown=0, NotChecked=0, Total=17292 [2021-11-09 08:48:13,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-09 08:48:13,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 144. [2021-11-09 08:48:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.0419580419580419) internal successors, (149), 143 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2021-11-09 08:48:13,046 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 140 [2021-11-09 08:48:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:48:13,046 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2021-11-09 08:48:13,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:13,047 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2021-11-09 08:48:13,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-09 08:48:13,048 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:48:13,048 INFO L513 BasicCegarLoop]: trace histogram [60, 56, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:48:13,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-09 08:48:13,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-09 08:48:13,263 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:48:13,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:48:13,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1356357230, now seen corresponding path program 55 times [2021-11-09 08:48:13,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:48:13,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426367312] [2021-11-09 08:48:13,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:48:13,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:48:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3736 backedges. 399 proven. 3192 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-09 08:48:14,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:48:14,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426367312] [2021-11-09 08:48:14,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426367312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:14,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814862011] [2021-11-09 08:48:14,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:48:14,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:14,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:48:14,847 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:48:14,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-09 08:48:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:16,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-09 08:48:16,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:48:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3736 backedges. 399 proven. 3192 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-09 08:48:16,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814862011] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:16,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:48:16,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-11-09 08:48:16,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710023440] [2021-11-09 08:48:16,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-09 08:48:16,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:48:16,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-09 08:48:16,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 08:48:16,848 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand has 60 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 60 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:17,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:48:17,039 INFO L93 Difference]: Finished difference Result 176 states and 187 transitions. [2021-11-09 08:48:17,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-09 08:48:17,040 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 60 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-09 08:48:17,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:48:17,041 INFO L225 Difference]: With dead ends: 176 [2021-11-09 08:48:17,041 INFO L226 Difference]: Without dead ends: 146 [2021-11-09 08:48:17,042 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 08:48:17,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-09 08:48:17,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-11-09 08:48:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0413793103448277) internal successors, (151), 145 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:17,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 151 transitions. [2021-11-09 08:48:17,050 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 151 transitions. Word has length 143 [2021-11-09 08:48:17,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:48:17,050 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 151 transitions. [2021-11-09 08:48:17,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 60 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:17,051 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 151 transitions. [2021-11-09 08:48:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-09 08:48:17,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:48:17,052 INFO L513 BasicCegarLoop]: trace histogram [61, 57, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:48:17,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-09 08:48:17,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-09 08:48:17,252 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:48:17,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:48:17,253 INFO L85 PathProgramCache]: Analyzing trace with hash -597846577, now seen corresponding path program 56 times [2021-11-09 08:48:17,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:48:17,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342685455] [2021-11-09 08:48:17,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:48:17,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:48:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 406 proven. 3306 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-09 08:48:18,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:48:18,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342685455] [2021-11-09 08:48:18,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342685455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:18,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234251688] [2021-11-09 08:48:18,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:48:18,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:18,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:48:18,790 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:48:18,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-09 08:48:20,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:48:20,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:48:20,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-09 08:48:20,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:48:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 406 proven. 3306 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-09 08:48:20,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234251688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:20,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:48:20,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2021-11-09 08:48:20,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398527513] [2021-11-09 08:48:20,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-09 08:48:20,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:48:20,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-09 08:48:20,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 08:48:20,856 INFO L87 Difference]: Start difference. First operand 146 states and 151 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 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 08:48:21,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:48:21,010 INFO L93 Difference]: Finished difference Result 178 states and 189 transitions. [2021-11-09 08:48:21,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-09 08:48:21,011 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-09 08:48:21,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:48:21,012 INFO L225 Difference]: With dead ends: 178 [2021-11-09 08:48:21,012 INFO L226 Difference]: Without dead ends: 148 [2021-11-09 08:48:21,012 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 08:48:21,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-09 08:48:21,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-11-09 08:48:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0408163265306123) internal successors, (153), 147 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:21,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 153 transitions. [2021-11-09 08:48:21,021 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 153 transitions. Word has length 145 [2021-11-09 08:48:21,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:48:21,021 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 153 transitions. [2021-11-09 08:48:21,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 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 08:48:21,021 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 153 transitions. [2021-11-09 08:48:21,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-09 08:48:21,022 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:48:21,022 INFO L513 BasicCegarLoop]: trace histogram [62, 58, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:48:21,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-09 08:48:21,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:21,223 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:48:21,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:48:21,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1813549364, now seen corresponding path program 57 times [2021-11-09 08:48:21,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:48:21,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343117617] [2021-11-09 08:48:21,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:48:21,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:48:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 413 proven. 3422 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-09 08:48:22,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:48:22,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343117617] [2021-11-09 08:48:22,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343117617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:22,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763642417] [2021-11-09 08:48:22,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:48:22,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:22,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:48:22,865 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:48:22,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-09 08:48:24,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-09 08:48:24,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:48:24,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 08:48:24,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:48:25,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 422 proven. 136 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2021-11-09 08:48:25,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763642417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:25,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:48:25,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 21] total 80 [2021-11-09 08:48:25,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250270571] [2021-11-09 08:48:25,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-09 08:48:25,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:48:25,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-09 08:48:25,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2039, Invalid=4281, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 08:48:25,537 INFO L87 Difference]: Start difference. First operand 148 states and 153 transitions. Second operand has 80 states, 80 states have (on average 1.95) internal successors, (156), 80 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 08:48:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:48:27,634 INFO L93 Difference]: Finished difference Result 201 states and 223 transitions. [2021-11-09 08:48:27,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-09 08:48:27,634 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.95) internal successors, (156), 80 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 147 [2021-11-09 08:48:27,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:48:27,636 INFO L225 Difference]: With dead ends: 201 [2021-11-09 08:48:27,636 INFO L226 Difference]: Without dead ends: 171 [2021-11-09 08:48:27,638 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6523, Invalid=12659, Unknown=0, NotChecked=0, Total=19182 [2021-11-09 08:48:27,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-09 08:48:27,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 151. [2021-11-09 08:48:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.04) internal successors, (156), 150 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 08:48:27,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 156 transitions. [2021-11-09 08:48:27,649 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 156 transitions. Word has length 147 [2021-11-09 08:48:27,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:48:27,650 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 156 transitions. [2021-11-09 08:48:27,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.95) internal successors, (156), 80 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 08:48:27,650 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 156 transitions. [2021-11-09 08:48:27,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-09 08:48:27,651 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:48:27,652 INFO L513 BasicCegarLoop]: trace histogram [63, 59, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:48:27,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-11-09 08:48:27,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:27,852 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:48:27,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:48:27,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2073689603, now seen corresponding path program 58 times [2021-11-09 08:48:27,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:48:27,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346204224] [2021-11-09 08:48:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:48:27,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:48:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4122 backedges. 420 proven. 3540 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-09 08:48:29,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:48:29,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346204224] [2021-11-09 08:48:29,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346204224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:29,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865986326] [2021-11-09 08:48:29,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:48:29,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:29,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:48:29,534 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:48:29,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-09 08:48:31,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:48:31,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:48:31,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-09 08:48:31,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:48:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4122 backedges. 420 proven. 3540 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-09 08:48:31,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865986326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:31,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:48:31,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2021-11-09 08:48:31,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70766157] [2021-11-09 08:48:31,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-09 08:48:31,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:48:31,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-09 08:48:31,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 08:48:31,644 INFO L87 Difference]: Start difference. First operand 151 states and 156 transitions. Second operand has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:31,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:48:31,831 INFO L93 Difference]: Finished difference Result 184 states and 195 transitions. [2021-11-09 08:48:31,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-09 08:48:31,832 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 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 150 [2021-11-09 08:48:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:48:31,844 INFO L225 Difference]: With dead ends: 184 [2021-11-09 08:48:31,844 INFO L226 Difference]: Without dead ends: 153 [2021-11-09 08:48:31,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 08:48:31,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-09 08:48:31,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-09 08:48:31,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0394736842105263) internal successors, (158), 152 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:31,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 158 transitions. [2021-11-09 08:48:31,870 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 158 transitions. Word has length 150 [2021-11-09 08:48:31,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:48:31,870 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 158 transitions. [2021-11-09 08:48:31,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:31,871 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 158 transitions. [2021-11-09 08:48:31,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-09 08:48:31,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:48:31,883 INFO L513 BasicCegarLoop]: trace histogram [64, 60, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:48:31,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-09 08:48:32,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:32,096 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:48:32,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:48:32,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1479621414, now seen corresponding path program 59 times [2021-11-09 08:48:32,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:48:32,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682538837] [2021-11-09 08:48:32,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:48:32,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:48:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4249 backedges. 427 proven. 3660 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-09 08:48:33,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:48:33,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682538837] [2021-11-09 08:48:33,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682538837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:33,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971672499] [2021-11-09 08:48:33,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:48:33,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:33,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:48:33,702 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:48:33,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-09 08:48:35,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2021-11-09 08:48:35,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:48:35,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-09 08:48:35,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:48:35,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4249 backedges. 427 proven. 3660 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-09 08:48:35,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971672499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:35,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:48:35,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-11-09 08:48:35,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286638328] [2021-11-09 08:48:35,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-09 08:48:35,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:48:35,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-09 08:48:35,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 08:48:35,665 INFO L87 Difference]: Start difference. First operand 153 states and 158 transitions. Second operand has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:35,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:48:35,878 INFO L93 Difference]: Finished difference Result 186 states and 197 transitions. [2021-11-09 08:48:35,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-09 08:48:35,879 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-09 08:48:35,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:48:35,881 INFO L225 Difference]: With dead ends: 186 [2021-11-09 08:48:35,881 INFO L226 Difference]: Without dead ends: 155 [2021-11-09 08:48:35,882 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 08:48:35,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-09 08:48:35,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-11-09 08:48:35,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0389610389610389) internal successors, (160), 154 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:35,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 160 transitions. [2021-11-09 08:48:35,890 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 160 transitions. Word has length 152 [2021-11-09 08:48:35,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:48:35,891 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 160 transitions. [2021-11-09 08:48:35,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:35,891 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 160 transitions. [2021-11-09 08:48:35,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-09 08:48:35,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:48:35,892 INFO L513 BasicCegarLoop]: trace histogram [65, 61, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:48:35,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-09 08:48:36,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:36,093 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:48:36,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:48:36,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1810742153, now seen corresponding path program 60 times [2021-11-09 08:48:36,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:48:36,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709546253] [2021-11-09 08:48:36,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:48:36,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:48:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 434 proven. 3782 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-09 08:48:37,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:48:37,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709546253] [2021-11-09 08:48:37,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709546253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:37,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744626563] [2021-11-09 08:48:37,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:48:37,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:37,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:48:37,659 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:48:37,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-09 08:48:39,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-09 08:48:39,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:48:39,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:48:39,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:48:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 549 proven. 16 refuted. 0 times theorem prover too weak. 3813 trivial. 0 not checked. [2021-11-09 08:48:39,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744626563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:39,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:48:39,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 7] total 69 [2021-11-09 08:48:39,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638704309] [2021-11-09 08:48:39,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-09 08:48:39,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:48:39,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-09 08:48:39,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-09 08:48:39,714 INFO L87 Difference]: Start difference. First operand 155 states and 160 transitions. Second operand has 69 states, 69 states have (on average 2.130434782608696) internal successors, (147), 69 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:39,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:48:39,955 INFO L93 Difference]: Finished difference Result 191 states and 205 transitions. [2021-11-09 08:48:39,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-09 08:48:39,956 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.130434782608696) internal successors, (147), 69 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-09 08:48:39,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:48:39,957 INFO L225 Difference]: With dead ends: 191 [2021-11-09 08:48:39,957 INFO L226 Difference]: Without dead ends: 160 [2021-11-09 08:48:39,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-09 08:48:39,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-09 08:48:39,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-11-09 08:48:39,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0443037974683544) internal successors, (165), 158 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 165 transitions. [2021-11-09 08:48:39,969 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 165 transitions. Word has length 154 [2021-11-09 08:48:39,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:48:39,969 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 165 transitions. [2021-11-09 08:48:39,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.130434782608696) internal successors, (147), 69 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:39,970 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 165 transitions. [2021-11-09 08:48:39,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-09 08:48:39,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:48:39,971 INFO L513 BasicCegarLoop]: trace histogram [67, 62, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:48:40,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-09 08:48:40,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:40,173 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:48:40,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:48:40,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1823680879, now seen corresponding path program 61 times [2021-11-09 08:48:40,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:48:40,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743203023] [2021-11-09 08:48:40,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:48:40,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:48:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4642 backedges. 567 proven. 3906 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-09 08:48:41,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:48:41,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743203023] [2021-11-09 08:48:41,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743203023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:41,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220976918] [2021-11-09 08:48:41,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:48:41,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:41,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:48:41,789 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:48:41,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-09 08:48:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:43,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-09 08:48:43,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:48:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4642 backedges. 567 proven. 3906 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-09 08:48:43,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220976918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:43,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:48:43,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-11-09 08:48:43,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053252409] [2021-11-09 08:48:43,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-09 08:48:43,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:48:43,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-09 08:48:43,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 08:48:43,719 INFO L87 Difference]: Start difference. First operand 159 states and 165 transitions. Second operand has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:43,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:48:43,858 INFO L93 Difference]: Finished difference Result 194 states and 207 transitions. [2021-11-09 08:48:43,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-09 08:48:43,858 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-09 08:48:43,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:48:43,859 INFO L225 Difference]: With dead ends: 194 [2021-11-09 08:48:43,859 INFO L226 Difference]: Without dead ends: 161 [2021-11-09 08:48:43,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 08:48:43,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-09 08:48:43,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-09 08:48:43,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.04375) internal successors, (167), 160 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:43,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 167 transitions. [2021-11-09 08:48:43,898 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 167 transitions. Word has length 158 [2021-11-09 08:48:43,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:48:43,898 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 167 transitions. [2021-11-09 08:48:43,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:43,899 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 167 transitions. [2021-11-09 08:48:43,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-09 08:48:43,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:48:43,900 INFO L513 BasicCegarLoop]: trace histogram [68, 63, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:48:43,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-09 08:48:44,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:44,127 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:48:44,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:48:44,128 INFO L85 PathProgramCache]: Analyzing trace with hash 2092056756, now seen corresponding path program 62 times [2021-11-09 08:48:44,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:48:44,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784579243] [2021-11-09 08:48:44,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:48:44,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:48:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4777 backedges. 576 proven. 4032 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-09 08:48:45,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:48:45,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784579243] [2021-11-09 08:48:45,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784579243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:45,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562718412] [2021-11-09 08:48:45,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:48:45,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:45,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:48:45,675 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:48:45,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-09 08:48:47,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:48:47,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:48:47,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-09 08:48:47,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:48:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4777 backedges. 576 proven. 4032 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-09 08:48:47,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562718412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:47,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:48:47,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2021-11-09 08:48:47,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270266758] [2021-11-09 08:48:47,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-09 08:48:47,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:48:47,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-09 08:48:47,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 08:48:47,742 INFO L87 Difference]: Start difference. First operand 161 states and 167 transitions. Second operand has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:47,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:48:47,894 INFO L93 Difference]: Finished difference Result 196 states and 209 transitions. [2021-11-09 08:48:47,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-09 08:48:47,894 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-11-09 08:48:47,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:48:47,895 INFO L225 Difference]: With dead ends: 196 [2021-11-09 08:48:47,895 INFO L226 Difference]: Without dead ends: 163 [2021-11-09 08:48:47,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 08:48:47,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-09 08:48:47,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-11-09 08:48:47,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0432098765432098) internal successors, (169), 162 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:47,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 169 transitions. [2021-11-09 08:48:47,917 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 169 transitions. Word has length 160 [2021-11-09 08:48:47,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:48:47,917 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 169 transitions. [2021-11-09 08:48:47,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:47,917 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 169 transitions. [2021-11-09 08:48:47,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-09 08:48:47,918 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:48:47,918 INFO L513 BasicCegarLoop]: trace histogram [69, 64, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:48:47,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-09 08:48:48,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:48,131 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:48:48,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:48:48,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1570394601, now seen corresponding path program 63 times [2021-11-09 08:48:48,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:48:48,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650537563] [2021-11-09 08:48:48,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:48:48,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:48:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4914 backedges. 585 proven. 4160 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-09 08:48:49,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:48:49,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650537563] [2021-11-09 08:48:49,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650537563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:49,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659440354] [2021-11-09 08:48:49,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:48:49,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:49,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:48:49,730 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:48:49,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-09 08:48:51,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-09 08:48:51,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:48:51,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 08:48:51,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:48:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4914 backedges. 601 proven. 153 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2021-11-09 08:48:52,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659440354] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:52,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:48:52,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 23] total 88 [2021-11-09 08:48:52,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409189990] [2021-11-09 08:48:52,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-09 08:48:52,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:48:52,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-09 08:48:52,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2463, Invalid=5193, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 08:48:52,382 INFO L87 Difference]: Start difference. First operand 163 states and 169 transitions. Second operand has 88 states, 88 states have (on average 1.9431818181818181) internal successors, (171), 88 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:54,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:48:54,461 INFO L93 Difference]: Finished difference Result 229 states and 258 transitions. [2021-11-09 08:48:54,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-09 08:48:54,461 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.9431818181818181) internal successors, (171), 88 states have internal predecessors, (171), 0 states have call successors, (0), 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 162 [2021-11-09 08:48:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:48:54,462 INFO L225 Difference]: With dead ends: 229 [2021-11-09 08:48:54,462 INFO L226 Difference]: Without dead ends: 196 [2021-11-09 08:48:54,464 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3834 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=7858, Invalid=15398, Unknown=0, NotChecked=0, Total=23256 [2021-11-09 08:48:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-09 08:48:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 166. [2021-11-09 08:48:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.0424242424242425) internal successors, (172), 165 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:54,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 172 transitions. [2021-11-09 08:48:54,478 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 172 transitions. Word has length 162 [2021-11-09 08:48:54,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:48:54,479 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 172 transitions. [2021-11-09 08:48:54,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.9431818181818181) internal successors, (171), 88 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:54,479 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 172 transitions. [2021-11-09 08:48:54,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-09 08:48:54,480 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:48:54,480 INFO L513 BasicCegarLoop]: trace histogram [70, 65, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:48:54,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-09 08:48:54,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-09 08:48:54,699 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:48:54,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:48:54,699 INFO L85 PathProgramCache]: Analyzing trace with hash -175115790, now seen corresponding path program 64 times [2021-11-09 08:48:54,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:48:54,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439584320] [2021-11-09 08:48:54,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:48:54,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:48:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 594 proven. 4290 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-09 08:48:56,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:48:56,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439584320] [2021-11-09 08:48:56,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439584320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:56,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526812873] [2021-11-09 08:48:56,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:48:56,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:56,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:48:56,381 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:48:56,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-09 08:48:58,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:48:58,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:48:58,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-09 08:48:58,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:48:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 594 proven. 4290 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-09 08:48:58,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526812873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:58,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:48:58,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2021-11-09 08:48:58,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713081799] [2021-11-09 08:48:58,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-09 08:48:58,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:48:58,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-09 08:48:58,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-09 08:48:58,549 INFO L87 Difference]: Start difference. First operand 166 states and 172 transitions. Second operand has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:58,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:48:58,706 INFO L93 Difference]: Finished difference Result 202 states and 215 transitions. [2021-11-09 08:48:58,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-09 08:48:58,706 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-11-09 08:48:58,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:48:58,708 INFO L225 Difference]: With dead ends: 202 [2021-11-09 08:48:58,708 INFO L226 Difference]: Without dead ends: 168 [2021-11-09 08:48:58,709 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 165 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 08:48:58,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-09 08:48:58,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-11-09 08:48:58,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0419161676646707) internal successors, (174), 167 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:58,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 174 transitions. [2021-11-09 08:48:58,719 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 174 transitions. Word has length 165 [2021-11-09 08:48:58,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:48:58,720 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 174 transitions. [2021-11-09 08:48:58,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:58,720 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 174 transitions. [2021-11-09 08:48:58,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-09 08:48:58,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:48:58,722 INFO L513 BasicCegarLoop]: trace histogram [71, 66, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:48:58,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-09 08:48:58,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-09 08:48:58,935 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:48:58,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:48:58,936 INFO L85 PathProgramCache]: Analyzing trace with hash 283667055, now seen corresponding path program 65 times [2021-11-09 08:48:58,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:48:58,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778501658] [2021-11-09 08:48:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:48:58,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:48:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5212 backedges. 603 proven. 4422 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-09 08:49:00,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:49:00,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778501658] [2021-11-09 08:49:00,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778501658] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:00,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325171318] [2021-11-09 08:49:00,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:49:00,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:00,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:49:00,702 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:49:00,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-09 08:49:02,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2021-11-09 08:49:02,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:49:02,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-09 08:49:02,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:49:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5212 backedges. 603 proven. 4422 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-09 08:49:02,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325171318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:02,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:49:02,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2021-11-09 08:49:02,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276565842] [2021-11-09 08:49:02,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-09 08:49:02,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:49:02,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-09 08:49:02,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 08:49:02,888 INFO L87 Difference]: Start difference. First operand 168 states and 174 transitions. Second operand has 70 states, 70 states have (on average 2.1) internal successors, (147), 70 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:03,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:49:03,033 INFO L93 Difference]: Finished difference Result 204 states and 217 transitions. [2021-11-09 08:49:03,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-09 08:49:03,034 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1) internal successors, (147), 70 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-11-09 08:49:03,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:49:03,035 INFO L225 Difference]: With dead ends: 204 [2021-11-09 08:49:03,035 INFO L226 Difference]: Without dead ends: 170 [2021-11-09 08:49:03,036 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 08:49:03,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-09 08:49:03,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-11-09 08:49:03,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.0414201183431953) internal successors, (176), 169 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:03,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 176 transitions. [2021-11-09 08:49:03,051 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 176 transitions. Word has length 167 [2021-11-09 08:49:03,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:49:03,052 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 176 transitions. [2021-11-09 08:49:03,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1) internal successors, (147), 70 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:03,052 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 176 transitions. [2021-11-09 08:49:03,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-09 08:49:03,053 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:49:03,053 INFO L513 BasicCegarLoop]: trace histogram [72, 67, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:49:03,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-09 08:49:03,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-09 08:49:03,267 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:49:03,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:49:03,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1207650388, now seen corresponding path program 66 times [2021-11-09 08:49:03,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:49:03,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536924263] [2021-11-09 08:49:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:49:03,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:49:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 612 proven. 4556 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-09 08:49:05,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:49:05,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536924263] [2021-11-09 08:49:05,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536924263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:05,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140550745] [2021-11-09 08:49:05,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:49:05,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:05,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:49:05,066 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:49:05,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-09 08:49:06,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-09 08:49:06,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:49:06,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 08:49:06,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:49:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 628 proven. 171 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-11-09 08:49:07,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140550745] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:07,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:49:07,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 24] total 92 [2021-11-09 08:49:07,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876824132] [2021-11-09 08:49:07,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-09 08:49:07,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:49:07,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-09 08:49:07,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2690, Invalid=5682, Unknown=0, NotChecked=0, Total=8372 [2021-11-09 08:49:07,882 INFO L87 Difference]: Start difference. First operand 170 states and 176 transitions. Second operand has 92 states, 92 states have (on average 1.934782608695652) internal successors, (178), 92 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:10,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:49:10,192 INFO L93 Difference]: Finished difference Result 237 states and 266 transitions. [2021-11-09 08:49:10,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-09 08:49:10,193 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.934782608695652) internal successors, (178), 92 states have internal predecessors, (178), 0 states have call successors, (0), 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 08:49:10,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:49:10,194 INFO L225 Difference]: With dead ends: 237 [2021-11-09 08:49:10,194 INFO L226 Difference]: Without dead ends: 203 [2021-11-09 08:49:10,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4184 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=8606, Invalid=16834, Unknown=0, NotChecked=0, Total=25440 [2021-11-09 08:49:10,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-09 08:49:10,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 173. [2021-11-09 08:49:10,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0406976744186047) internal successors, (179), 172 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:10,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 179 transitions. [2021-11-09 08:49:10,213 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 179 transitions. Word has length 169 [2021-11-09 08:49:10,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:49:10,213 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 179 transitions. [2021-11-09 08:49:10,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.934782608695652) internal successors, (178), 92 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:10,214 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 179 transitions. [2021-11-09 08:49:10,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-09 08:49:10,215 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:49:10,215 INFO L513 BasicCegarLoop]: trace histogram [73, 68, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:49:10,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-09 08:49:10,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:10,432 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:49:10,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:49:10,432 INFO L85 PathProgramCache]: Analyzing trace with hash 522974435, now seen corresponding path program 67 times [2021-11-09 08:49:10,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:49:10,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653146413] [2021-11-09 08:49:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:49:10,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:49:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5519 backedges. 621 proven. 4692 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-09 08:49:12,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:49:12,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653146413] [2021-11-09 08:49:12,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653146413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:12,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271019893] [2021-11-09 08:49:12,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:49:12,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:12,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:49:12,252 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:49:12,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-09 08:49:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:14,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-09 08:49:14,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:49:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5519 backedges. 621 proven. 4692 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-09 08:49:14,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271019893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:14,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:49:14,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-11-09 08:49:14,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011159035] [2021-11-09 08:49:14,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-09 08:49:14,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:49:14,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-09 08:49:14,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 08:49:14,631 INFO L87 Difference]: Start difference. First operand 173 states and 179 transitions. Second operand has 72 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:14,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:49:14,853 INFO L93 Difference]: Finished difference Result 210 states and 223 transitions. [2021-11-09 08:49:14,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-09 08:49:14,854 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 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 172 [2021-11-09 08:49:14,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:49:14,855 INFO L225 Difference]: With dead ends: 210 [2021-11-09 08:49:14,855 INFO L226 Difference]: Without dead ends: 175 [2021-11-09 08:49:14,856 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 08:49:14,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-09 08:49:14,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-11-09 08:49:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0402298850574712) internal successors, (181), 174 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:14,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 181 transitions. [2021-11-09 08:49:14,876 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 181 transitions. Word has length 172 [2021-11-09 08:49:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:49:14,876 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 181 transitions. [2021-11-09 08:49:14,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:14,877 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 181 transitions. [2021-11-09 08:49:14,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-09 08:49:14,878 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:49:14,878 INFO L513 BasicCegarLoop]: trace histogram [74, 69, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:49:14,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-09 08:49:15,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:15,091 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:49:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:49:15,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1456432582, now seen corresponding path program 68 times [2021-11-09 08:49:15,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:49:15,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842867433] [2021-11-09 08:49:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:49:15,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:49:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5666 backedges. 630 proven. 4830 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-09 08:49:17,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:49:17,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842867433] [2021-11-09 08:49:17,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842867433] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:17,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062932789] [2021-11-09 08:49:17,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:49:17,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:17,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:49:17,062 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:49:17,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-09 08:49:19,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:49:19,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:49:19,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-09 08:49:19,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:49:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5666 backedges. 630 proven. 4830 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-09 08:49:19,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062932789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:19,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:49:19,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2021-11-09 08:49:19,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805757954] [2021-11-09 08:49:19,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-09 08:49:19,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:49:19,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-09 08:49:19,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 08:49:19,505 INFO L87 Difference]: Start difference. First operand 175 states and 181 transitions. Second operand has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:19,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:49:19,679 INFO L93 Difference]: Finished difference Result 212 states and 225 transitions. [2021-11-09 08:49:19,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-09 08:49:19,680 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-09 08:49:19,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:49:19,681 INFO L225 Difference]: With dead ends: 212 [2021-11-09 08:49:19,681 INFO L226 Difference]: Without dead ends: 177 [2021-11-09 08:49:19,681 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 08:49:19,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-09 08:49:19,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-11-09 08:49:19,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0397727272727273) internal successors, (183), 176 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:19,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 183 transitions. [2021-11-09 08:49:19,692 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 183 transitions. Word has length 174 [2021-11-09 08:49:19,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:49:19,692 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 183 transitions. [2021-11-09 08:49:19,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:19,693 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 183 transitions. [2021-11-09 08:49:19,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-09 08:49:19,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:49:19,694 INFO L513 BasicCegarLoop]: trace histogram [75, 70, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:49:19,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-11-09 08:49:19,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:19,911 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:49:19,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:49:19,911 INFO L85 PathProgramCache]: Analyzing trace with hash 861546985, now seen corresponding path program 69 times [2021-11-09 08:49:19,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:49:19,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243993811] [2021-11-09 08:49:19,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:49:19,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:49:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5815 backedges. 639 proven. 4970 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-09 08:49:21,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:49:21,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243993811] [2021-11-09 08:49:21,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243993811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:21,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315792289] [2021-11-09 08:49:21,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:49:21,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:21,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:49:21,901 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:49:21,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-09 08:49:23,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-09 08:49:23,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:49:23,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 08:49:23,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:49:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5815 backedges. 655 proven. 190 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2021-11-09 08:49:25,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315792289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:25,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:49:25,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 25] total 96 [2021-11-09 08:49:25,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248258432] [2021-11-09 08:49:25,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-09 08:49:25,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:49:25,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-09 08:49:25,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=6193, Unknown=0, NotChecked=0, Total=9120 [2021-11-09 08:49:25,145 INFO L87 Difference]: Start difference. First operand 177 states and 183 transitions. Second operand has 96 states, 96 states have (on average 1.9270833333333333) internal successors, (185), 96 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:27,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:49:27,768 INFO L93 Difference]: Finished difference Result 245 states and 274 transitions. [2021-11-09 08:49:27,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-09 08:49:27,769 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.9270833333333333) internal successors, (185), 96 states have internal predecessors, (185), 0 states have call successors, (0), 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 08:49:27,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:49:27,771 INFO L225 Difference]: With dead ends: 245 [2021-11-09 08:49:27,771 INFO L226 Difference]: Without dead ends: 210 [2021-11-09 08:49:27,774 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4549 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=9388, Invalid=18334, Unknown=0, NotChecked=0, Total=27722 [2021-11-09 08:49:27,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-09 08:49:27,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 180. [2021-11-09 08:49:27,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.0391061452513966) internal successors, (186), 179 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 186 transitions. [2021-11-09 08:49:27,797 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 186 transitions. Word has length 176 [2021-11-09 08:49:27,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:49:27,798 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 186 transitions. [2021-11-09 08:49:27,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.9270833333333333) internal successors, (185), 96 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:27,798 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 186 transitions. [2021-11-09 08:49:27,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-09 08:49:27,800 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:49:27,800 INFO L513 BasicCegarLoop]: trace histogram [76, 71, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:49:27,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-11-09 08:49:28,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:28,015 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:49:28,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:49:28,016 INFO L85 PathProgramCache]: Analyzing trace with hash -261938784, now seen corresponding path program 70 times [2021-11-09 08:49:28,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:49:28,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012385280] [2021-11-09 08:49:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:49:28,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:49:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 648 proven. 5112 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-09 08:49:30,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:49:30,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012385280] [2021-11-09 08:49:30,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012385280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:30,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707241096] [2021-11-09 08:49:30,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:49:30,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:30,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:49:30,094 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:49:30,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-09 08:49:32,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:49:32,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:49:32,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-09 08:49:32,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:49:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 648 proven. 5112 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-09 08:49:32,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707241096] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:32,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:49:32,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2021-11-09 08:49:32,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467057626] [2021-11-09 08:49:32,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-09 08:49:32,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:49:32,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-09 08:49:32,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-11-09 08:49:32,862 INFO L87 Difference]: Start difference. First operand 180 states and 186 transitions. Second operand has 75 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 75 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:33,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:49:33,085 INFO L93 Difference]: Finished difference Result 218 states and 231 transitions. [2021-11-09 08:49:33,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-09 08:49:33,085 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 75 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2021-11-09 08:49:33,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:49:33,088 INFO L225 Difference]: With dead ends: 218 [2021-11-09 08:49:33,088 INFO L226 Difference]: Without dead ends: 182 [2021-11-09 08:49:33,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-11-09 08:49:33,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-09 08:49:33,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-11-09 08:49:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.0386740331491713) internal successors, (188), 181 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:33,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 188 transitions. [2021-11-09 08:49:33,107 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 188 transitions. Word has length 179 [2021-11-09 08:49:33,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:49:33,108 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 188 transitions. [2021-11-09 08:49:33,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 75 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:33,108 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 188 transitions. [2021-11-09 08:49:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-09 08:49:33,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:49:33,110 INFO L513 BasicCegarLoop]: trace histogram [77, 72, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:49:33,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-11-09 08:49:33,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:33,335 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:49:33,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:49:33,335 INFO L85 PathProgramCache]: Analyzing trace with hash 195853149, now seen corresponding path program 71 times [2021-11-09 08:49:33,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:49:33,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958621392] [2021-11-09 08:49:33,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:49:33,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:49:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 657 proven. 5256 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-09 08:49:35,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:49:35,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958621392] [2021-11-09 08:49:35,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958621392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:35,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314741981] [2021-11-09 08:49:35,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:49:35,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:35,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:49:35,566 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:49:35,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-09 08:49:37,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2021-11-09 08:49:37,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:49:37,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-09 08:49:37,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:49:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 657 proven. 5256 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-09 08:49:38,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314741981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:38,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:49:38,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2021-11-09 08:49:38,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680727836] [2021-11-09 08:49:38,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-09 08:49:38,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:49:38,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-09 08:49:38,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 08:49:38,281 INFO L87 Difference]: Start difference. First operand 182 states and 188 transitions. Second operand has 76 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:38,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:49:38,512 INFO L93 Difference]: Finished difference Result 220 states and 233 transitions. [2021-11-09 08:49:38,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-09 08:49:38,513 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-11-09 08:49:38,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:49:38,514 INFO L225 Difference]: With dead ends: 220 [2021-11-09 08:49:38,514 INFO L226 Difference]: Without dead ends: 184 [2021-11-09 08:49:38,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 08:49:38,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-09 08:49:38,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2021-11-09 08:49:38,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.0382513661202186) internal successors, (190), 183 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 190 transitions. [2021-11-09 08:49:38,534 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 190 transitions. Word has length 181 [2021-11-09 08:49:38,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:49:38,535 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 190 transitions. [2021-11-09 08:49:38,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 190 transitions. [2021-11-09 08:49:38,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-09 08:49:38,536 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:49:38,537 INFO L513 BasicCegarLoop]: trace histogram [78, 73, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:49:38,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-11-09 08:49:38,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-11-09 08:49:38,747 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:49:38,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:49:38,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2047236570, now seen corresponding path program 72 times [2021-11-09 08:49:38,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:49:38,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123048735] [2021-11-09 08:49:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:49:38,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:49:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6294 backedges. 666 proven. 5402 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-09 08:49:40,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:49:40,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123048735] [2021-11-09 08:49:40,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123048735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:40,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359289934] [2021-11-09 08:49:40,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:49:40,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:40,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:49:40,936 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:49:40,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-09 08:49:43,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-11-09 08:49:43,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:49:43,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 08:49:43,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:49:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6294 backedges. 682 proven. 210 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2021-11-09 08:49:44,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359289934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:44,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:49:44,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 26] total 100 [2021-11-09 08:49:44,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203534149] [2021-11-09 08:49:44,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-11-09 08:49:44,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:49:44,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-11-09 08:49:44,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3174, Invalid=6726, Unknown=0, NotChecked=0, Total=9900 [2021-11-09 08:49:44,655 INFO L87 Difference]: Start difference. First operand 184 states and 190 transitions. Second operand has 100 states, 100 states have (on average 1.92) internal successors, (192), 100 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 08:49:47,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:49:47,772 INFO L93 Difference]: Finished difference Result 253 states and 282 transitions. [2021-11-09 08:49:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-09 08:49:47,773 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.92) internal successors, (192), 100 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) Word has length 183 [2021-11-09 08:49:47,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:49:47,774 INFO L225 Difference]: With dead ends: 253 [2021-11-09 08:49:47,774 INFO L226 Difference]: Without dead ends: 217 [2021-11-09 08:49:47,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4929 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=10204, Invalid=19898, Unknown=0, NotChecked=0, Total=30102 [2021-11-09 08:49:47,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-09 08:49:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 187. [2021-11-09 08:49:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.0376344086021505) internal successors, (193), 186 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:47,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 193 transitions. [2021-11-09 08:49:47,788 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 193 transitions. Word has length 183 [2021-11-09 08:49:47,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:49:47,788 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 193 transitions. [2021-11-09 08:49:47,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.92) internal successors, (192), 100 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 08:49:47,789 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 193 transitions. [2021-11-09 08:49:47,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-09 08:49:47,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:49:47,790 INFO L513 BasicCegarLoop]: trace histogram [79, 74, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:49:47,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-11-09 08:49:47,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-11-09 08:49:47,990 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:49:47,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:49:47,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1929936693, now seen corresponding path program 73 times [2021-11-09 08:49:47,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:49:47,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727044001] [2021-11-09 08:49:47,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:49:47,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:49:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6472 backedges. 675 proven. 5550 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-09 08:49:50,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:49:50,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727044001] [2021-11-09 08:49:50,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727044001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:50,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007353812] [2021-11-09 08:49:50,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:49:50,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:50,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:49:50,260 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:49:50,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-09 08:49:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:52,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-09 08:49:52,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:49:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6472 backedges. 675 proven. 5550 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-09 08:49:53,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007353812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:53,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:49:53,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2021-11-09 08:49:53,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012514787] [2021-11-09 08:49:53,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-09 08:49:53,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:49:53,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-09 08:49:53,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 08:49:53,160 INFO L87 Difference]: Start difference. First operand 187 states and 193 transitions. Second operand has 78 states, 78 states have (on average 2.08974358974359) internal successors, (163), 78 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:53,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:49:53,499 INFO L93 Difference]: Finished difference Result 226 states and 239 transitions. [2021-11-09 08:49:53,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-09 08:49:53,500 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.08974358974359) internal successors, (163), 78 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2021-11-09 08:49:53,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:49:53,502 INFO L225 Difference]: With dead ends: 226 [2021-11-09 08:49:53,502 INFO L226 Difference]: Without dead ends: 189 [2021-11-09 08:49:53,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 08:49:53,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-09 08:49:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-11-09 08:49:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0372340425531914) internal successors, (195), 188 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 195 transitions. [2021-11-09 08:49:53,524 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 195 transitions. Word has length 186 [2021-11-09 08:49:53,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:49:53,524 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 195 transitions. [2021-11-09 08:49:53,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.08974358974359) internal successors, (163), 78 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 195 transitions. [2021-11-09 08:49:53,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-09 08:49:53,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:49:53,526 INFO L513 BasicCegarLoop]: trace histogram [80, 75, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:49:53,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-11-09 08:49:53,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-11-09 08:49:53,751 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:49:53,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:49:53,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1116264744, now seen corresponding path program 74 times [2021-11-09 08:49:53,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:49:53,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299078583] [2021-11-09 08:49:53,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:49:53,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:49:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6631 backedges. 684 proven. 5700 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-09 08:49:56,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:49:56,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299078583] [2021-11-09 08:49:56,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299078583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:56,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217489309] [2021-11-09 08:49:56,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:49:56,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:56,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:49:56,085 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:49:56,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-09 08:49:58,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:49:58,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:49:58,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-09 08:49:58,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:49:59,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6631 backedges. 684 proven. 5700 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-09 08:49:59,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217489309] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:59,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:49:59,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2021-11-09 08:49:59,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402854686] [2021-11-09 08:49:59,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-09 08:49:59,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:49:59,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-09 08:49:59,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-11-09 08:49:59,108 INFO L87 Difference]: Start difference. First operand 189 states and 195 transitions. Second operand has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:49:59,377 INFO L93 Difference]: Finished difference Result 228 states and 241 transitions. [2021-11-09 08:49:59,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-09 08:49:59,378 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 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 188 [2021-11-09 08:49:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:49:59,380 INFO L225 Difference]: With dead ends: 228 [2021-11-09 08:49:59,380 INFO L226 Difference]: Without dead ends: 191 [2021-11-09 08:49:59,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-11-09 08:49:59,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-09 08:49:59,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-11-09 08:49:59,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0368421052631578) internal successors, (197), 190 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:59,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 197 transitions. [2021-11-09 08:49:59,401 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 197 transitions. Word has length 188 [2021-11-09 08:49:59,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:49:59,401 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 197 transitions. [2021-11-09 08:49:59,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:49:59,402 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 197 transitions. [2021-11-09 08:49:59,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-09 08:49:59,403 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:49:59,404 INFO L513 BasicCegarLoop]: trace histogram [81, 76, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:49:59,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-11-09 08:49:59,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-11-09 08:49:59,631 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:49:59,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:49:59,632 INFO L85 PathProgramCache]: Analyzing trace with hash 651850171, now seen corresponding path program 75 times [2021-11-09 08:49:59,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:49:59,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763902147] [2021-11-09 08:49:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:49:59,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:49:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:50:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6792 backedges. 693 proven. 5852 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-09 08:50:02,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:50:02,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763902147] [2021-11-09 08:50:02,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763902147] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:02,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247561039] [2021-11-09 08:50:02,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:50:02,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:50:02,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:50:02,166 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:50:02,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-09 08:50:04,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-09 08:50:04,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:50:04,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:50:04,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:50:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6792 backedges. 836 proven. 25 refuted. 0 times theorem prover too weak. 5931 trivial. 0 not checked. [2021-11-09 08:50:05,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247561039] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:05,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:50:05,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 8] total 85 [2021-11-09 08:50:05,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329775266] [2021-11-09 08:50:05,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-09 08:50:05,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:50:05,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-09 08:50:05,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-11-09 08:50:05,737 INFO L87 Difference]: Start difference. First operand 191 states and 197 transitions. Second operand has 85 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:06,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:50:06,291 INFO L93 Difference]: Finished difference Result 233 states and 249 transitions. [2021-11-09 08:50:06,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-09 08:50:06,292 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 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 190 [2021-11-09 08:50:06,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:50:06,294 INFO L225 Difference]: With dead ends: 233 [2021-11-09 08:50:06,295 INFO L226 Difference]: Without dead ends: 196 [2021-11-09 08:50:06,296 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-11-09 08:50:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-09 08:50:06,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-11-09 08:50:06,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.041237113402062) internal successors, (202), 194 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:06,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 202 transitions. [2021-11-09 08:50:06,324 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 202 transitions. Word has length 190 [2021-11-09 08:50:06,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:50:06,324 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 202 transitions. [2021-11-09 08:50:06,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:06,325 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 202 transitions. [2021-11-09 08:50:06,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-09 08:50:06,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:50:06,327 INFO L513 BasicCegarLoop]: trace histogram [83, 77, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:50:06,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-11-09 08:50:06,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:50:06,543 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:50:06,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:50:06,544 INFO L85 PathProgramCache]: Analyzing trace with hash 185817155, now seen corresponding path program 76 times [2021-11-09 08:50:06,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:50:06,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352813911] [2021-11-09 08:50:06,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:50:06,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:50:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:50:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 858 proven. 6006 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-09 08:50:09,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:50:09,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352813911] [2021-11-09 08:50:09,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352813911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:09,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959619909] [2021-11-09 08:50:09,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:50:09,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:50:09,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:50:09,541 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:50:09,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-09 08:50:12,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:50:12,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:50:12,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-09 08:50:12,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:50:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 858 proven. 6006 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-09 08:50:12,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959619909] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:12,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:50:12,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2021-11-09 08:50:12,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686152968] [2021-11-09 08:50:12,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-09 08:50:12,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:50:12,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-09 08:50:12,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-11-09 08:50:12,898 INFO L87 Difference]: Start difference. First operand 195 states and 202 transitions. Second operand has 81 states, 81 states have (on average 2.0864197530864197) internal successors, (169), 81 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:13,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:50:13,106 INFO L93 Difference]: Finished difference Result 236 states and 251 transitions. [2021-11-09 08:50:13,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-09 08:50:13,107 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0864197530864197) internal successors, (169), 81 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2021-11-09 08:50:13,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:50:13,108 INFO L225 Difference]: With dead ends: 236 [2021-11-09 08:50:13,108 INFO L226 Difference]: Without dead ends: 197 [2021-11-09 08:50:13,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-11-09 08:50:13,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-09 08:50:13,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-11-09 08:50:13,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0408163265306123) internal successors, (204), 196 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:13,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 204 transitions. [2021-11-09 08:50:13,129 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 204 transitions. Word has length 194 [2021-11-09 08:50:13,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:50:13,129 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 204 transitions. [2021-11-09 08:50:13,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0864197530864197) internal successors, (169), 81 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:13,130 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 204 transitions. [2021-11-09 08:50:13,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-09 08:50:13,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:50:13,131 INFO L513 BasicCegarLoop]: trace histogram [84, 78, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:50:13,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-09 08:50:13,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:50:13,335 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:50:13,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:50:13,336 INFO L85 PathProgramCache]: Analyzing trace with hash 327003366, now seen corresponding path program 77 times [2021-11-09 08:50:13,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:50:13,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406897237] [2021-11-09 08:50:13,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:50:13,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:50:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:50:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7287 backedges. 869 proven. 6162 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-09 08:50:15,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:50:15,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406897237] [2021-11-09 08:50:15,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406897237] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:15,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483392221] [2021-11-09 08:50:15,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:50:15,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:50:15,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:50:15,827 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:50:15,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-09 08:50:18,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2021-11-09 08:50:18,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:50:18,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-09 08:50:18,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:50:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7287 backedges. 869 proven. 6162 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-09 08:50:19,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483392221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:19,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:50:19,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2021-11-09 08:50:19,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692592358] [2021-11-09 08:50:19,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-09 08:50:19,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:50:19,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-09 08:50:19,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-11-09 08:50:19,086 INFO L87 Difference]: Start difference. First operand 197 states and 204 transitions. Second operand has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:19,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:50:19,303 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2021-11-09 08:50:19,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-09 08:50:19,304 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 0 states have call successors, (0), 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 08:50:19,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:50:19,305 INFO L225 Difference]: With dead ends: 238 [2021-11-09 08:50:19,305 INFO L226 Difference]: Without dead ends: 199 [2021-11-09 08:50:19,305 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-11-09 08:50:19,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-09 08:50:19,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-11-09 08:50:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.0404040404040404) internal successors, (206), 198 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:19,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 206 transitions. [2021-11-09 08:50:19,318 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 206 transitions. Word has length 196 [2021-11-09 08:50:19,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:50:19,318 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 206 transitions. [2021-11-09 08:50:19,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:19,318 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 206 transitions. [2021-11-09 08:50:19,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-09 08:50:19,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:50:19,320 INFO L513 BasicCegarLoop]: trace histogram [85, 79, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:50:19,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-11-09 08:50:19,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:50:19,534 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:50:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:50:19,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1432001335, now seen corresponding path program 78 times [2021-11-09 08:50:19,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:50:19,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634964502] [2021-11-09 08:50:19,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:50:19,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:50:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:50:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7456 backedges. 880 proven. 6320 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-09 08:50:22,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:50:22,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634964502] [2021-11-09 08:50:22,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634964502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:22,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146630083] [2021-11-09 08:50:22,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:50:22,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:50:22,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:50:22,108 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:50:22,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-09 08:50:24,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-11-09 08:50:24,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:50:24,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 08:50:24,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:50:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7456 backedges. 905 proven. 231 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2021-11-09 08:50:26,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146630083] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:26,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:50:26,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 27] total 107 [2021-11-09 08:50:26,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221021727] [2021-11-09 08:50:26,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-09 08:50:26,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:50:26,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-09 08:50:26,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3671, Invalid=7671, Unknown=0, NotChecked=0, Total=11342 [2021-11-09 08:50:26,409 INFO L87 Difference]: Start difference. First operand 199 states and 206 transitions. Second operand has 107 states, 107 states have (on average 1.9345794392523366) internal successors, (207), 107 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:50:30,142 INFO L93 Difference]: Finished difference Result 283 states and 320 transitions. [2021-11-09 08:50:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-09 08:50:30,142 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.9345794392523366) internal successors, (207), 107 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2021-11-09 08:50:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:50:30,144 INFO L225 Difference]: With dead ends: 283 [2021-11-09 08:50:30,144 INFO L226 Difference]: Without dead ends: 244 [2021-11-09 08:50:30,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5751 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=11751, Invalid=23031, Unknown=0, NotChecked=0, Total=34782 [2021-11-09 08:50:30,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-09 08:50:30,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 202. [2021-11-09 08:50:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.0398009950248757) internal successors, (209), 201 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 209 transitions. [2021-11-09 08:50:30,169 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 209 transitions. Word has length 198 [2021-11-09 08:50:30,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:50:30,170 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 209 transitions. [2021-11-09 08:50:30,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.9345794392523366) internal successors, (207), 107 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 209 transitions. [2021-11-09 08:50:30,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-09 08:50:30,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:50:30,172 INFO L513 BasicCegarLoop]: trace histogram [86, 80, 22, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:50:30,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-11-09 08:50:30,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:50:30,399 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:50:30,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:50:30,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1053772032, now seen corresponding path program 79 times [2021-11-09 08:50:30,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:50:30,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003359888] [2021-11-09 08:50:30,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:50:30,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:50:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:50:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7649 backedges. 891 proven. 6480 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-09 08:50:33,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:50:33,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003359888] [2021-11-09 08:50:33,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003359888] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:33,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485116882] [2021-11-09 08:50:33,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:50:33,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:50:33,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:50:33,261 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:50:33,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-09 08:50:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:50:36,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-09 08:50:36,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:50:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7649 backedges. 891 proven. 6480 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-09 08:50:36,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485116882] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:36,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:50:36,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2021-11-09 08:50:36,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137841633] [2021-11-09 08:50:36,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-09 08:50:36,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:50:36,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-09 08:50:36,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-11-09 08:50:36,948 INFO L87 Difference]: Start difference. First operand 202 states and 209 transitions. Second operand has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:37,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:50:37,243 INFO L93 Difference]: Finished difference Result 244 states and 259 transitions. [2021-11-09 08:50:37,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-09 08:50:37,244 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-11-09 08:50:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:50:37,245 INFO L225 Difference]: With dead ends: 244 [2021-11-09 08:50:37,245 INFO L226 Difference]: Without dead ends: 204 [2021-11-09 08:50:37,245 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-11-09 08:50:37,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-09 08:50:37,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2021-11-09 08:50:37,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0394088669950738) internal successors, (211), 203 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:37,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 211 transitions. [2021-11-09 08:50:37,262 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 211 transitions. Word has length 201 [2021-11-09 08:50:37,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:50:37,262 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 211 transitions. [2021-11-09 08:50:37,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:37,263 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 211 transitions. [2021-11-09 08:50:37,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-09 08:50:37,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:50:37,265 INFO L513 BasicCegarLoop]: trace histogram [87, 81, 22, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:50:37,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-11-09 08:50:37,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:50:37,491 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:50:37,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:50:37,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1419736317, now seen corresponding path program 80 times [2021-11-09 08:50:37,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:50:37,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486843855] [2021-11-09 08:50:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:50:37,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:50:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:50:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7822 backedges. 902 proven. 6642 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-09 08:50:40,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:50:40,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486843855] [2021-11-09 08:50:40,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486843855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:40,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030575819] [2021-11-09 08:50:40,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:50:40,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:50:40,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:50:40,394 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:50:40,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-09 08:50:43,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:50:43,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:50:43,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-09 08:50:43,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:50:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7822 backedges. 902 proven. 6642 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-09 08:50:43,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030575819] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:43,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:50:43,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2021-11-09 08:50:43,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143820008] [2021-11-09 08:50:43,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-09 08:50:43,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:50:43,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-09 08:50:43,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-11-09 08:50:43,727 INFO L87 Difference]: Start difference. First operand 204 states and 211 transitions. Second operand has 85 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 85 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:50:43,933 INFO L93 Difference]: Finished difference Result 246 states and 261 transitions. [2021-11-09 08:50:43,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-09 08:50:43,933 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 85 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-11-09 08:50:43,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:50:43,934 INFO L225 Difference]: With dead ends: 246 [2021-11-09 08:50:43,934 INFO L226 Difference]: Without dead ends: 206 [2021-11-09 08:50:43,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-11-09 08:50:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-09 08:50:43,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-11-09 08:50:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.0390243902439025) internal successors, (213), 205 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:43,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 213 transitions. [2021-11-09 08:50:43,949 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 213 transitions. Word has length 203 [2021-11-09 08:50:43,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:50:43,949 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 213 transitions. [2021-11-09 08:50:43,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 85 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:43,950 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 213 transitions. [2021-11-09 08:50:43,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-09 08:50:43,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:50:43,951 INFO L513 BasicCegarLoop]: trace histogram [88, 82, 22, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:50:43,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-11-09 08:50:44,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-11-09 08:50:44,167 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:50:44,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:50:44,167 INFO L85 PathProgramCache]: Analyzing trace with hash -950622278, now seen corresponding path program 81 times [2021-11-09 08:50:44,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:50:44,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689018142] [2021-11-09 08:50:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:50:44,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:50:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:50:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 913 proven. 6806 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-09 08:50:46,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:50:46,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689018142] [2021-11-09 08:50:46,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689018142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:46,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608114154] [2021-11-09 08:50:46,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:50:46,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:50:46,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:50:46,761 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:50:46,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-09 08:50:49,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-09 08:50:49,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:50:49,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 08:50:49,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:50:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 938 proven. 253 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2021-11-09 08:50:51,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608114154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:51,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:50:51,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 28] total 111 [2021-11-09 08:50:51,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777968499] [2021-11-09 08:50:51,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-11-09 08:50:51,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:50:51,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-11-09 08:50:51,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3947, Invalid=8263, Unknown=0, NotChecked=0, Total=12210 [2021-11-09 08:50:51,042 INFO L87 Difference]: Start difference. First operand 206 states and 213 transitions. Second operand has 111 states, 111 states have (on average 1.927927927927928) internal successors, (214), 111 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:54,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:50:54,536 INFO L93 Difference]: Finished difference Result 291 states and 328 transitions. [2021-11-09 08:50:54,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-09 08:50:54,536 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.927927927927928) internal successors, (214), 111 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-11-09 08:50:54,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:50:54,538 INFO L225 Difference]: With dead ends: 291 [2021-11-09 08:50:54,538 INFO L226 Difference]: Without dead ends: 251 [2021-11-09 08:50:54,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6178 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=12662, Invalid=24780, Unknown=0, NotChecked=0, Total=37442 [2021-11-09 08:50:54,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-09 08:50:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 209. [2021-11-09 08:50:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0384615384615385) internal successors, (216), 208 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:54,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 216 transitions. [2021-11-09 08:50:54,555 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 216 transitions. Word has length 205 [2021-11-09 08:50:54,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:50:54,555 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 216 transitions. [2021-11-09 08:50:54,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.927927927927928) internal successors, (214), 111 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:50:54,556 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 216 transitions. [2021-11-09 08:50:54,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-09 08:50:54,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:50:54,557 INFO L513 BasicCegarLoop]: trace histogram [89, 83, 23, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:50:54,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-11-09 08:50:54,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-11-09 08:50:54,765 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:50:54,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:50:54,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1198444267, now seen corresponding path program 82 times [2021-11-09 08:50:54,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:50:54,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685807708] [2021-11-09 08:50:54,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:50:54,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:50:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:50:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8197 backedges. 924 proven. 6972 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-09 08:50:57,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:50:57,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685807708] [2021-11-09 08:50:57,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685807708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:57,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230803425] [2021-11-09 08:50:57,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:50:57,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:50:57,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:50:57,683 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:50:57,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-09 08:51:00,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:51:00,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:51:00,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-09 08:51:00,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:51:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8197 backedges. 924 proven. 6972 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-09 08:51:01,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230803425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:51:01,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:51:01,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2021-11-09 08:51:01,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399087688] [2021-11-09 08:51:01,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-09 08:51:01,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:51:01,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-09 08:51:01,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-11-09 08:51:01,280 INFO L87 Difference]: Start difference. First operand 209 states and 216 transitions. Second operand has 87 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 87 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:01,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:51:01,517 INFO L93 Difference]: Finished difference Result 252 states and 267 transitions. [2021-11-09 08:51:01,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-09 08:51:01,518 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 87 states have internal predecessors, (181), 0 states have call successors, (0), 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 208 [2021-11-09 08:51:01,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:51:01,519 INFO L225 Difference]: With dead ends: 252 [2021-11-09 08:51:01,519 INFO L226 Difference]: Without dead ends: 211 [2021-11-09 08:51:01,520 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-11-09 08:51:01,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-09 08:51:01,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2021-11-09 08:51:01,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.0380952380952382) internal successors, (218), 210 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 08:51:01,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 218 transitions. [2021-11-09 08:51:01,534 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 218 transitions. Word has length 208 [2021-11-09 08:51:01,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:51:01,534 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 218 transitions. [2021-11-09 08:51:01,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 87 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:01,535 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 218 transitions. [2021-11-09 08:51:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-09 08:51:01,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:51:01,536 INFO L513 BasicCegarLoop]: trace histogram [90, 84, 23, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:51:01,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-11-09 08:51:01,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:51:01,736 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:51:01,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:51:01,737 INFO L85 PathProgramCache]: Analyzing trace with hash -183686024, now seen corresponding path program 83 times [2021-11-09 08:51:01,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:51:01,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662493294] [2021-11-09 08:51:01,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:51:01,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:51:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:51:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8376 backedges. 935 proven. 7140 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-09 08:51:04,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:51:04,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662493294] [2021-11-09 08:51:04,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662493294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:51:04,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178785999] [2021-11-09 08:51:04,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:51:04,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:51:04,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:51:04,485 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:51:04,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-09 08:51:07,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2021-11-09 08:51:07,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:51:07,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-09 08:51:07,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:51:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8376 backedges. 935 proven. 7140 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-09 08:51:08,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178785999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:51:08,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:51:08,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2021-11-09 08:51:08,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058228270] [2021-11-09 08:51:08,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-09 08:51:08,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:51:08,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-09 08:51:08,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 08:51:08,107 INFO L87 Difference]: Start difference. First operand 211 states and 218 transitions. Second operand has 88 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 88 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:08,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:51:08,337 INFO L93 Difference]: Finished difference Result 254 states and 269 transitions. [2021-11-09 08:51:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-09 08:51:08,338 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 88 states have internal predecessors, (183), 0 states have call successors, (0), 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 210 [2021-11-09 08:51:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:51:08,339 INFO L225 Difference]: With dead ends: 254 [2021-11-09 08:51:08,339 INFO L226 Difference]: Without dead ends: 213 [2021-11-09 08:51:08,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 08:51:08,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-09 08:51:08,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2021-11-09 08:51:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0377358490566038) internal successors, (220), 212 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:08,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 220 transitions. [2021-11-09 08:51:08,364 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 220 transitions. Word has length 210 [2021-11-09 08:51:08,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:51:08,364 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 220 transitions. [2021-11-09 08:51:08,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 88 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:08,365 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 220 transitions. [2021-11-09 08:51:08,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-09 08:51:08,365 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:51:08,366 INFO L513 BasicCegarLoop]: trace histogram [91, 85, 23, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:51:08,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-11-09 08:51:08,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:51:08,566 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:51:08,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:51:08,567 INFO L85 PathProgramCache]: Analyzing trace with hash 41409307, now seen corresponding path program 84 times [2021-11-09 08:51:08,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:51:08,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230709370] [2021-11-09 08:51:08,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:51:08,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:51:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:51:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8557 backedges. 946 proven. 7310 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-09 08:51:11,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:51:11,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230709370] [2021-11-09 08:51:11,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230709370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:51:11,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572761192] [2021-11-09 08:51:11,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:51:11,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:51:11,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:51:11,432 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:51:11,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-09 08:51:14,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-09 08:51:14,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:51:14,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 08:51:14,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:51:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8557 backedges. 971 proven. 276 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2021-11-09 08:51:16,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572761192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:51:16,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:51:16,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 29] total 115 [2021-11-09 08:51:16,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754716534] [2021-11-09 08:51:16,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-11-09 08:51:16,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:51:16,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-11-09 08:51:16,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4233, Invalid=8877, Unknown=0, NotChecked=0, Total=13110 [2021-11-09 08:51:16,204 INFO L87 Difference]: Start difference. First operand 213 states and 220 transitions. Second operand has 115 states, 115 states have (on average 1.9217391304347826) internal successors, (221), 115 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:19,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:51:19,914 INFO L93 Difference]: Finished difference Result 299 states and 336 transitions. [2021-11-09 08:51:19,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-11-09 08:51:19,914 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.9217391304347826) internal successors, (221), 115 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 212 [2021-11-09 08:51:19,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:51:19,915 INFO L225 Difference]: With dead ends: 299 [2021-11-09 08:51:19,915 INFO L226 Difference]: Without dead ends: 258 [2021-11-09 08:51:19,918 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6620 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=13607, Invalid=26593, Unknown=0, NotChecked=0, Total=40200 [2021-11-09 08:51:19,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-09 08:51:19,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 216. [2021-11-09 08:51:19,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0372093023255815) internal successors, (223), 215 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 223 transitions. [2021-11-09 08:51:19,937 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 223 transitions. Word has length 212 [2021-11-09 08:51:19,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:51:19,937 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 223 transitions. [2021-11-09 08:51:19,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.9217391304347826) internal successors, (221), 115 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:19,938 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 223 transitions. [2021-11-09 08:51:19,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-09 08:51:19,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:51:19,939 INFO L513 BasicCegarLoop]: trace histogram [92, 86, 24, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:51:19,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-11-09 08:51:20,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:51:20,155 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:51:20,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:51:20,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1638556626, now seen corresponding path program 85 times [2021-11-09 08:51:20,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:51:20,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263123543] [2021-11-09 08:51:20,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:51:20,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:51:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:51:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8764 backedges. 957 proven. 7482 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-09 08:51:23,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:51:23,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263123543] [2021-11-09 08:51:23,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263123543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:51:23,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167751707] [2021-11-09 08:51:23,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:51:23,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:51:23,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:51:23,211 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:51:23,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-09 08:51:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:51:26,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-09 08:51:26,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:51:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8764 backedges. 957 proven. 7482 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-09 08:51:27,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167751707] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:51:27,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:51:27,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2021-11-09 08:51:27,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115782674] [2021-11-09 08:51:27,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-09 08:51:27,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:51:27,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-09 08:51:27,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-11-09 08:51:27,142 INFO L87 Difference]: Start difference. First operand 216 states and 223 transitions. Second operand has 90 states, 90 states have (on average 2.077777777777778) internal successors, (187), 90 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:27,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:51:27,417 INFO L93 Difference]: Finished difference Result 260 states and 275 transitions. [2021-11-09 08:51:27,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-09 08:51:27,417 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.077777777777778) internal successors, (187), 90 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2021-11-09 08:51:27,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:51:27,418 INFO L225 Difference]: With dead ends: 260 [2021-11-09 08:51:27,418 INFO L226 Difference]: Without dead ends: 218 [2021-11-09 08:51:27,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-11-09 08:51:27,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-09 08:51:27,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-11-09 08:51:27,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.0368663594470047) internal successors, (225), 217 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:27,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 225 transitions. [2021-11-09 08:51:27,440 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 225 transitions. Word has length 215 [2021-11-09 08:51:27,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:51:27,440 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 225 transitions. [2021-11-09 08:51:27,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.077777777777778) internal successors, (187), 90 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:27,440 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 225 transitions. [2021-11-09 08:51:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-09 08:51:27,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:51:27,441 INFO L513 BasicCegarLoop]: trace histogram [93, 87, 24, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:51:27,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-11-09 08:51:27,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-11-09 08:51:27,642 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:51:27,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:51:27,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1687001963, now seen corresponding path program 86 times [2021-11-09 08:51:27,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:51:27,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648861632] [2021-11-09 08:51:27,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:51:27,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:51:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:51:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8949 backedges. 968 proven. 7656 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-09 08:51:30,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:51:30,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648861632] [2021-11-09 08:51:30,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648861632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:51:30,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482460430] [2021-11-09 08:51:30,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:51:30,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:51:30,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:51:30,817 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:51:30,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-11-09 08:51:34,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:51:34,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:51:34,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-09 08:51:34,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:51:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8949 backedges. 968 proven. 7656 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-09 08:51:34,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482460430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:51:34,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:51:34,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2021-11-09 08:51:34,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767976944] [2021-11-09 08:51:34,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-09 08:51:34,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:51:34,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-09 08:51:34,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-11-09 08:51:34,630 INFO L87 Difference]: Start difference. First operand 218 states and 225 transitions. Second operand has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 91 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:34,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:51:34,876 INFO L93 Difference]: Finished difference Result 262 states and 277 transitions. [2021-11-09 08:51:34,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-09 08:51:34,877 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 91 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2021-11-09 08:51:34,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:51:34,878 INFO L225 Difference]: With dead ends: 262 [2021-11-09 08:51:34,878 INFO L226 Difference]: Without dead ends: 220 [2021-11-09 08:51:34,879 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-11-09 08:51:34,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-09 08:51:34,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2021-11-09 08:51:34,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0365296803652968) internal successors, (227), 219 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 227 transitions. [2021-11-09 08:51:34,893 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 227 transitions. Word has length 217 [2021-11-09 08:51:34,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:51:34,894 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 227 transitions. [2021-11-09 08:51:34,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 91 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:34,894 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 227 transitions. [2021-11-09 08:51:34,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-09 08:51:34,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:51:34,895 INFO L513 BasicCegarLoop]: trace histogram [94, 88, 24, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:51:34,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-11-09 08:51:35,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:51:35,096 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:51:35,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:51:35,096 INFO L85 PathProgramCache]: Analyzing trace with hash 2093137768, now seen corresponding path program 87 times [2021-11-09 08:51:35,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:51:35,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39091227] [2021-11-09 08:51:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:51:35,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:51:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:51:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9136 backedges. 979 proven. 7832 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-09 08:51:38,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:51:38,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39091227] [2021-11-09 08:51:38,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39091227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:51:38,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223897754] [2021-11-09 08:51:38,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:51:38,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:51:38,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:51:38,289 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:51:38,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-09 08:51:41,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-09 08:51:41,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:51:41,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 08:51:41,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:51:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9136 backedges. 1004 proven. 300 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2021-11-09 08:51:43,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223897754] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:51:43,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:51:43,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 30] total 119 [2021-11-09 08:51:43,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159213001] [2021-11-09 08:51:43,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-11-09 08:51:43,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:51:43,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-11-09 08:51:43,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4529, Invalid=9513, Unknown=0, NotChecked=0, Total=14042 [2021-11-09 08:51:43,133 INFO L87 Difference]: Start difference. First operand 220 states and 227 transitions. Second operand has 119 states, 119 states have (on average 1.915966386554622) internal successors, (228), 119 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:47,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:51:47,416 INFO L93 Difference]: Finished difference Result 307 states and 344 transitions. [2021-11-09 08:51:47,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-11-09 08:51:47,416 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.915966386554622) internal successors, (228), 119 states have internal predecessors, (228), 0 states have call successors, (0), 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 219 [2021-11-09 08:51:47,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:51:47,418 INFO L225 Difference]: With dead ends: 307 [2021-11-09 08:51:47,418 INFO L226 Difference]: Without dead ends: 265 [2021-11-09 08:51:47,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7077 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=14586, Invalid=28470, Unknown=0, NotChecked=0, Total=43056 [2021-11-09 08:51:47,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-09 08:51:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 223. [2021-11-09 08:51:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.0360360360360361) internal successors, (230), 222 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 230 transitions. [2021-11-09 08:51:47,439 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 230 transitions. Word has length 219 [2021-11-09 08:51:47,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:51:47,439 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 230 transitions. [2021-11-09 08:51:47,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.915966386554622) internal successors, (228), 119 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 230 transitions. [2021-11-09 08:51:47,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-09 08:51:47,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:51:47,441 INFO L513 BasicCegarLoop]: trace histogram [95, 89, 25, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:51:47,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-11-09 08:51:47,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:51:47,643 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:51:47,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:51:47,644 INFO L85 PathProgramCache]: Analyzing trace with hash 733320679, now seen corresponding path program 88 times [2021-11-09 08:51:47,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:51:47,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769011091] [2021-11-09 08:51:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:51:47,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:51:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:51:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9350 backedges. 990 proven. 8010 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-11-09 08:51:50,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:51:50,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769011091] [2021-11-09 08:51:50,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769011091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:51:50,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530675706] [2021-11-09 08:51:50,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:51:50,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:51:50,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:51:50,911 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:51:50,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-11-09 08:51:54,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:51:54,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:51:54,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-09 08:51:54,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:51:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9350 backedges. 990 proven. 8010 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-11-09 08:51:55,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530675706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:51:55,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:51:55,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2021-11-09 08:51:55,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225891793] [2021-11-09 08:51:55,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-09 08:51:55,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:51:55,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-09 08:51:55,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-11-09 08:51:55,236 INFO L87 Difference]: Start difference. First operand 223 states and 230 transitions. Second operand has 93 states, 93 states have (on average 2.075268817204301) internal successors, (193), 93 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:55,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:51:55,604 INFO L93 Difference]: Finished difference Result 268 states and 283 transitions. [2021-11-09 08:51:55,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-09 08:51:55,605 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.075268817204301) internal successors, (193), 93 states have internal predecessors, (193), 0 states have call successors, (0), 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 222 [2021-11-09 08:51:55,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:51:55,606 INFO L225 Difference]: With dead ends: 268 [2021-11-09 08:51:55,607 INFO L226 Difference]: Without dead ends: 225 [2021-11-09 08:51:55,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-11-09 08:51:55,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-09 08:51:55,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2021-11-09 08:51:55,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0357142857142858) internal successors, (232), 224 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:55,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 232 transitions. [2021-11-09 08:51:55,634 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 232 transitions. Word has length 222 [2021-11-09 08:51:55,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:51:55,634 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 232 transitions. [2021-11-09 08:51:55,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.075268817204301) internal successors, (193), 93 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:51:55,635 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 232 transitions. [2021-11-09 08:51:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-09 08:51:55,636 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:51:55,637 INFO L513 BasicCegarLoop]: trace histogram [96, 90, 25, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:51:55,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-11-09 08:51:55,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:51:55,851 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:51:55,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:51:55,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1442342922, now seen corresponding path program 89 times [2021-11-09 08:51:55,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:51:55,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639679900] [2021-11-09 08:51:55,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:51:55,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:51:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:51:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9541 backedges. 1001 proven. 8190 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-11-09 08:51:59,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:51:59,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639679900] [2021-11-09 08:51:59,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639679900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:51:59,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077181672] [2021-11-09 08:51:59,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:51:59,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:51:59,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:51:59,314 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:51:59,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-11-09 08:52:02,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2021-11-09 08:52:02,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:52:02,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-09 08:52:02,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:52:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9541 backedges. 1001 proven. 8190 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-11-09 08:52:03,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077181672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:52:03,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:52:03,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2021-11-09 08:52:03,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800025819] [2021-11-09 08:52:03,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-09 08:52:03,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:52:03,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-09 08:52:03,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-11-09 08:52:03,460 INFO L87 Difference]: Start difference. First operand 225 states and 232 transitions. Second operand has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 94 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:52:03,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:52:03,759 INFO L93 Difference]: Finished difference Result 270 states and 285 transitions. [2021-11-09 08:52:03,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-09 08:52:03,760 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 94 states have internal predecessors, (195), 0 states have call successors, (0), 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 224 [2021-11-09 08:52:03,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:52:03,761 INFO L225 Difference]: With dead ends: 270 [2021-11-09 08:52:03,761 INFO L226 Difference]: Without dead ends: 227 [2021-11-09 08:52:03,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-11-09 08:52:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-09 08:52:03,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2021-11-09 08:52:03,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.0353982300884956) internal successors, (234), 226 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:52:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 234 transitions. [2021-11-09 08:52:03,780 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 234 transitions. Word has length 224 [2021-11-09 08:52:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:52:03,780 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 234 transitions. [2021-11-09 08:52:03,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 94 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:52:03,781 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 234 transitions. [2021-11-09 08:52:03,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-09 08:52:03,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:52:03,782 INFO L513 BasicCegarLoop]: trace histogram [97, 91, 25, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:52:03,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-11-09 08:52:03,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:52:03,987 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:52:03,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:52:03,987 INFO L85 PathProgramCache]: Analyzing trace with hash -87081619, now seen corresponding path program 90 times [2021-11-09 08:52:03,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:52:03,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800915057] [2021-11-09 08:52:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:52:03,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:52:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:52:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9734 backedges. 1012 proven. 8372 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-11-09 08:52:07,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:52:07,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800915057] [2021-11-09 08:52:07,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800915057] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:52:07,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593221837] [2021-11-09 08:52:07,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:52:07,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:52:07,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:52:07,756 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:52:07,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-09 08:52:11,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-11-09 08:52:11,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:52:11,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 08:52:11,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:52:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9734 backedges. 1037 proven. 325 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2021-11-09 08:52:13,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593221837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:52:13,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:52:13,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 31] total 123 [2021-11-09 08:52:13,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25993590] [2021-11-09 08:52:13,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-09 08:52:13,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:52:13,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-09 08:52:13,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4835, Invalid=10171, Unknown=0, NotChecked=0, Total=15006 [2021-11-09 08:52:13,248 INFO L87 Difference]: Start difference. First operand 227 states and 234 transitions. Second operand has 123 states, 123 states have (on average 1.910569105691057) internal successors, (235), 123 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:52:18,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:52:18,033 INFO L93 Difference]: Finished difference Result 315 states and 352 transitions. [2021-11-09 08:52:18,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-09 08:52:18,034 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.910569105691057) internal successors, (235), 123 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 226 [2021-11-09 08:52:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:52:18,036 INFO L225 Difference]: With dead ends: 315 [2021-11-09 08:52:18,036 INFO L226 Difference]: Without dead ends: 272 [2021-11-09 08:52:18,038 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7549 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=15599, Invalid=30411, Unknown=0, NotChecked=0, Total=46010 [2021-11-09 08:52:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-09 08:52:18,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 230. [2021-11-09 08:52:18,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.034934497816594) internal successors, (237), 229 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:52:18,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 237 transitions. [2021-11-09 08:52:18,057 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 237 transitions. Word has length 226 [2021-11-09 08:52:18,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:52:18,058 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 237 transitions. [2021-11-09 08:52:18,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.910569105691057) internal successors, (235), 123 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:52:18,058 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 237 transitions. [2021-11-09 08:52:18,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-09 08:52:18,059 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:52:18,059 INFO L513 BasicCegarLoop]: trace histogram [98, 92, 26, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:52:18,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-11-09 08:52:18,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-11-09 08:52:18,260 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:52:18,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:52:18,260 INFO L85 PathProgramCache]: Analyzing trace with hash -476322468, now seen corresponding path program 91 times [2021-11-09 08:52:18,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:52:18,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132978315] [2021-11-09 08:52:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:52:18,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:52:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:52:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9955 backedges. 1023 proven. 8556 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 08:52:21,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:52:21,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132978315] [2021-11-09 08:52:21,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132978315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:52:21,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482290205] [2021-11-09 08:52:21,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:52:21,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:52:21,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:52:21,948 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:52:21,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-11-09 08:52:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:52:25,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-09 08:52:25,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:52:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9955 backedges. 1023 proven. 8556 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 08:52:26,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482290205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:52:26,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:52:26,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2021-11-09 08:52:26,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762755514] [2021-11-09 08:52:26,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-09 08:52:26,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:52:26,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-09 08:52:26,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-11-09 08:52:26,556 INFO L87 Difference]: Start difference. First operand 230 states and 237 transitions. Second operand has 96 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 96 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:52:26,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:52:26,841 INFO L93 Difference]: Finished difference Result 276 states and 291 transitions. [2021-11-09 08:52:26,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-09 08:52:26,841 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 96 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2021-11-09 08:52:26,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:52:26,843 INFO L225 Difference]: With dead ends: 276 [2021-11-09 08:52:26,843 INFO L226 Difference]: Without dead ends: 232 [2021-11-09 08:52:26,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-11-09 08:52:26,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-09 08:52:26,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2021-11-09 08:52:26,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.0346320346320346) internal successors, (239), 231 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:52:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 239 transitions. [2021-11-09 08:52:26,863 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 239 transitions. Word has length 229 [2021-11-09 08:52:26,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:52:26,863 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 239 transitions. [2021-11-09 08:52:26,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 96 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:52:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 239 transitions. [2021-11-09 08:52:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-09 08:52:26,865 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:52:26,865 INFO L513 BasicCegarLoop]: trace histogram [99, 93, 26, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:52:26,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-11-09 08:52:27,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:52:27,066 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:52:27,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:52:27,066 INFO L85 PathProgramCache]: Analyzing trace with hash -172886567, now seen corresponding path program 92 times [2021-11-09 08:52:27,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:52:27,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305765932] [2021-11-09 08:52:27,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:52:27,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:52:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:52:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 1034 proven. 8742 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 08:52:31,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:52:31,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305765932] [2021-11-09 08:52:31,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305765932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:52:31,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840502653] [2021-11-09 08:52:31,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:52:31,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:52:31,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:52:31,102 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:52:31,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-09 08:52:35,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:52:35,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:52:35,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-09 08:52:35,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:52:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 1034 proven. 8742 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 08:52:35,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840502653] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:52:35,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:52:35,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2021-11-09 08:52:35,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379061862] [2021-11-09 08:52:35,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-09 08:52:35,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:52:35,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-09 08:52:35,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-09 08:52:35,732 INFO L87 Difference]: Start difference. First operand 232 states and 239 transitions. Second operand has 97 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 97 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:52:35,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:52:35,986 INFO L93 Difference]: Finished difference Result 278 states and 293 transitions. [2021-11-09 08:52:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-09 08:52:35,986 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 97 states have internal predecessors, (201), 0 states have call successors, (0), 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 231 [2021-11-09 08:52:35,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:52:35,988 INFO L225 Difference]: With dead ends: 278 [2021-11-09 08:52:35,988 INFO L226 Difference]: Without dead ends: 234 [2021-11-09 08:52:35,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-09 08:52:35,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-09 08:52:36,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2021-11-09 08:52:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.0343347639484979) internal successors, (241), 233 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:52:36,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 241 transitions. [2021-11-09 08:52:36,027 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 241 transitions. Word has length 231 [2021-11-09 08:52:36,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:52:36,027 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 241 transitions. [2021-11-09 08:52:36,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 97 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:52:36,028 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 241 transitions. [2021-11-09 08:52:36,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-09 08:52:36,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:52:36,029 INFO L513 BasicCegarLoop]: trace histogram [100, 94, 26, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:52:36,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-11-09 08:52:36,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:52:36,229 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:52:36,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:52:36,230 INFO L85 PathProgramCache]: Analyzing trace with hash -628761834, now seen corresponding path program 93 times [2021-11-09 08:52:36,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:52:36,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155940740] [2021-11-09 08:52:36,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:52:36,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:52:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:52:39,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10351 backedges. 1045 proven. 8930 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 08:52:39,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:52:39,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155940740] [2021-11-09 08:52:39,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155940740] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:52:39,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762512078] [2021-11-09 08:52:39,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:52:39,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:52:39,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:52:39,674 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:52:39,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-09 08:52:43,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-09 08:52:43,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:52:43,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 08:52:43,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:52:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10351 backedges. 1070 proven. 351 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2021-11-09 08:52:45,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762512078] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:52:45,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:52:45,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 32] total 127 [2021-11-09 08:52:45,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967702016] [2021-11-09 08:52:45,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-11-09 08:52:45,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:52:45,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-11-09 08:52:45,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=10851, Unknown=0, NotChecked=0, Total=16002 [2021-11-09 08:52:45,741 INFO L87 Difference]: Start difference. First operand 234 states and 241 transitions. Second operand has 127 states, 127 states have (on average 1.905511811023622) internal successors, (242), 127 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:52:50,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:52:50,943 INFO L93 Difference]: Finished difference Result 323 states and 360 transitions. [2021-11-09 08:52:50,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-11-09 08:52:50,943 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.905511811023622) internal successors, (242), 127 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2021-11-09 08:52:50,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:52:50,945 INFO L225 Difference]: With dead ends: 323 [2021-11-09 08:52:50,945 INFO L226 Difference]: Without dead ends: 279 [2021-11-09 08:52:50,947 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8036 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=16646, Invalid=32416, Unknown=0, NotChecked=0, Total=49062 [2021-11-09 08:52:50,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-09 08:52:50,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 237. [2021-11-09 08:52:50,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.0338983050847457) internal successors, (244), 236 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:52:50,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 244 transitions. [2021-11-09 08:52:50,968 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 244 transitions. Word has length 233 [2021-11-09 08:52:50,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:52:50,968 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 244 transitions. [2021-11-09 08:52:50,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.905511811023622) internal successors, (242), 127 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:52:50,969 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 244 transitions. [2021-11-09 08:52:50,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-09 08:52:50,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:52:50,970 INFO L513 BasicCegarLoop]: trace histogram [101, 95, 27, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:52:51,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-11-09 08:52:51,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-11-09 08:52:51,195 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:52:51,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:52:51,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1691395769, now seen corresponding path program 94 times [2021-11-09 08:52:51,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:52:51,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062924577] [2021-11-09 08:52:51,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:52:51,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:52:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:52:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10579 backedges. 1056 proven. 9120 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-09 08:52:55,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:52:55,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062924577] [2021-11-09 08:52:55,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062924577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:52:55,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440327978] [2021-11-09 08:52:55,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:52:55,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:52:55,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:52:55,228 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:52:55,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-11-09 08:52:59,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:52:59,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:52:59,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-09 08:52:59,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:53:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10579 backedges. 1056 proven. 9120 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-09 08:53:00,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440327978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:00,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:53:00,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2021-11-09 08:53:00,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393001246] [2021-11-09 08:53:00,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-09 08:53:00,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:53:00,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-09 08:53:00,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-11-09 08:53:00,150 INFO L87 Difference]: Start difference. First operand 237 states and 244 transitions. Second operand has 99 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 99 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:53:00,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:53:00,456 INFO L93 Difference]: Finished difference Result 284 states and 299 transitions. [2021-11-09 08:53:00,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-09 08:53:00,456 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 99 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-11-09 08:53:00,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:53:00,458 INFO L225 Difference]: With dead ends: 284 [2021-11-09 08:53:00,458 INFO L226 Difference]: Without dead ends: 239 [2021-11-09 08:53:00,459 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-11-09 08:53:00,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-09 08:53:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-11-09 08:53:00,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.0336134453781514) internal successors, (246), 238 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:53:00,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 246 transitions. [2021-11-09 08:53:00,479 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 246 transitions. Word has length 236 [2021-11-09 08:53:00,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:53:00,480 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 246 transitions. [2021-11-09 08:53:00,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 99 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:53:00,480 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 246 transitions. [2021-11-09 08:53:00,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-09 08:53:00,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:53:00,481 INFO L513 BasicCegarLoop]: trace histogram [102, 96, 27, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:53:00,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-11-09 08:53:00,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-11-09 08:53:00,682 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:53:00,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:53:00,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1178894436, now seen corresponding path program 95 times [2021-11-09 08:53:00,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:53:00,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417298036] [2021-11-09 08:53:00,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:53:00,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:53:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:53:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10782 backedges. 1067 proven. 9312 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-09 08:53:04,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:53:04,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417298036] [2021-11-09 08:53:04,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417298036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:04,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730415597] [2021-11-09 08:53:04,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:53:04,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:53:04,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:53:04,641 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:53:04,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-11-09 08:53:09,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 103 check-sat command(s) [2021-11-09 08:53:09,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:53:09,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-09 08:53:09,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:53:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10782 backedges. 1067 proven. 9312 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-09 08:53:09,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730415597] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:09,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:53:09,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2021-11-09 08:53:09,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687396022] [2021-11-09 08:53:09,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-11-09 08:53:09,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:53:09,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-11-09 08:53:09,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-11-09 08:53:09,767 INFO L87 Difference]: Start difference. First operand 239 states and 246 transitions. Second operand has 100 states, 100 states have (on average 2.07) internal successors, (207), 100 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:53:10,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:53:10,114 INFO L93 Difference]: Finished difference Result 286 states and 301 transitions. [2021-11-09 08:53:10,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-09 08:53:10,115 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.07) internal successors, (207), 100 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-09 08:53:10,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:53:10,116 INFO L225 Difference]: With dead ends: 286 [2021-11-09 08:53:10,117 INFO L226 Difference]: Without dead ends: 241 [2021-11-09 08:53:10,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-11-09 08:53:10,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-09 08:53:10,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-11-09 08:53:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0333333333333334) internal successors, (248), 240 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:53:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 248 transitions. [2021-11-09 08:53:10,143 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 248 transitions. Word has length 238 [2021-11-09 08:53:10,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:53:10,144 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 248 transitions. [2021-11-09 08:53:10,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.07) internal successors, (207), 100 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:53:10,144 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 248 transitions. [2021-11-09 08:53:10,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-09 08:53:10,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:53:10,146 INFO L513 BasicCegarLoop]: trace histogram [103, 97, 27, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:53:10,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-11-09 08:53:10,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-11-09 08:53:10,351 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:53:10,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:53:10,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2136189887, now seen corresponding path program 96 times [2021-11-09 08:53:10,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:53:10,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541437386] [2021-11-09 08:53:10,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:53:10,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:53:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:53:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10987 backedges. 1078 proven. 9506 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-09 08:53:14,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:53:14,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541437386] [2021-11-09 08:53:14,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541437386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:14,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956231520] [2021-11-09 08:53:14,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:53:14,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:53:14,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:53:14,562 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:53:14,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-11-09 08:53:19,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-11-09 08:53:19,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:53:19,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 08:53:19,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:53:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10987 backedges. 1261 proven. 36 refuted. 0 times theorem prover too weak. 9690 trivial. 0 not checked. [2021-11-09 08:53:20,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956231520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:20,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:53:20,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 9] total 107 [2021-11-09 08:53:20,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939987674] [2021-11-09 08:53:20,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-09 08:53:20,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:53:20,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-09 08:53:20,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2021-11-09 08:53:20,130 INFO L87 Difference]: Start difference. First operand 241 states and 248 transitions. Second operand has 107 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:53:20,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:53:20,698 INFO L93 Difference]: Finished difference Result 291 states and 309 transitions. [2021-11-09 08:53:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-09 08:53:20,699 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 240 [2021-11-09 08:53:20,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:53:20,700 INFO L225 Difference]: With dead ends: 291 [2021-11-09 08:53:20,701 INFO L226 Difference]: Without dead ends: 246 [2021-11-09 08:53:20,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2021-11-09 08:53:20,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-09 08:53:20,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2021-11-09 08:53:20,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0368852459016393) internal successors, (253), 244 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:53:20,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 253 transitions. [2021-11-09 08:53:20,725 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 253 transitions. Word has length 240 [2021-11-09 08:53:20,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:53:20,726 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 253 transitions. [2021-11-09 08:53:20,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:53:20,726 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 253 transitions. [2021-11-09 08:53:20,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-09 08:53:20,727 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:53:20,727 INFO L513 BasicCegarLoop]: trace histogram [105, 98, 27, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:53:20,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-11-09 08:53:20,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-11-09 08:53:20,931 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:53:20,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:53:20,931 INFO L85 PathProgramCache]: Analyzing trace with hash 476201671, now seen corresponding path program 97 times [2021-11-09 08:53:20,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:53:20,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360948987] [2021-11-09 08:53:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:53:20,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:53:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:53:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11403 backedges. 1287 proven. 9702 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-11-09 08:53:25,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:53:25,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360948987] [2021-11-09 08:53:25,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360948987] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:25,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178364023] [2021-11-09 08:53:25,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:53:25,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:53:25,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:53:25,121 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:53:25,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-11-09 08:53:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:53:29,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-09 08:53:29,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:53:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11403 backedges. 1287 proven. 9702 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-11-09 08:53:30,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178364023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:30,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:53:30,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2021-11-09 08:53:30,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443532821] [2021-11-09 08:53:30,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-11-09 08:53:30,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:53:30,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-11-09 08:53:30,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-11-09 08:53:30,277 INFO L87 Difference]: Start difference. First operand 245 states and 253 transitions. Second operand has 102 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 102 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:53:30,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:53:30,628 INFO L93 Difference]: Finished difference Result 294 states and 311 transitions. [2021-11-09 08:53:30,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-09 08:53:30,628 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 102 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2021-11-09 08:53:30,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:53:30,629 INFO L225 Difference]: With dead ends: 294 [2021-11-09 08:53:30,630 INFO L226 Difference]: Without dead ends: 247 [2021-11-09 08:53:30,631 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-11-09 08:53:30,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-09 08:53:30,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2021-11-09 08:53:30,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.0365853658536586) internal successors, (255), 246 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:53:30,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 255 transitions. [2021-11-09 08:53:30,652 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 255 transitions. Word has length 244 [2021-11-09 08:53:30,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:53:30,653 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 255 transitions. [2021-11-09 08:53:30,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 102 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:53:30,653 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 255 transitions. [2021-11-09 08:53:30,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-09 08:53:30,654 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:53:30,654 INFO L513 BasicCegarLoop]: trace histogram [106, 99, 27, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:53:30,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-11-09 08:53:30,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-11-09 08:53:30,855 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:53:30,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:53:30,855 INFO L85 PathProgramCache]: Analyzing trace with hash 497256618, now seen corresponding path program 98 times [2021-11-09 08:53:30,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:53:30,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471259555] [2021-11-09 08:53:30,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:53:30,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:53:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:53:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11614 backedges. 1300 proven. 9900 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-11-09 08:53:35,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:53:35,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471259555] [2021-11-09 08:53:35,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471259555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:35,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874779297] [2021-11-09 08:53:35,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:53:35,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:53:35,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:53:35,201 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:53:35,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-11-09 08:53:39,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:53:39,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:53:39,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-09 08:53:39,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:53:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11614 backedges. 1300 proven. 9900 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-11-09 08:53:40,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874779297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:40,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:53:40,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 103 [2021-11-09 08:53:40,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670271520] [2021-11-09 08:53:40,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-09 08:53:40,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:53:40,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-09 08:53:40,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-11-09 08:53:40,114 INFO L87 Difference]: Start difference. First operand 247 states and 255 transitions. Second operand has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:53:40,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:53:40,422 INFO L93 Difference]: Finished difference Result 296 states and 313 transitions. [2021-11-09 08:53:40,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-09 08:53:40,423 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 246 [2021-11-09 08:53:40,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:53:40,423 INFO L225 Difference]: With dead ends: 296 [2021-11-09 08:53:40,423 INFO L226 Difference]: Without dead ends: 249 [2021-11-09 08:53:40,425 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-11-09 08:53:40,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-09 08:53:40,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-11-09 08:53:40,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0362903225806452) internal successors, (257), 248 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:53:40,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 257 transitions. [2021-11-09 08:53:40,460 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 257 transitions. Word has length 246 [2021-11-09 08:53:40,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:53:40,461 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 257 transitions. [2021-11-09 08:53:40,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:53:40,461 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 257 transitions. [2021-11-09 08:53:40,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-09 08:53:40,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:53:40,462 INFO L513 BasicCegarLoop]: trace histogram [107, 100, 27, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:53:40,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-11-09 08:53:40,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-11-09 08:53:40,663 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:53:40,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:53:40,663 INFO L85 PathProgramCache]: Analyzing trace with hash -743775795, now seen corresponding path program 99 times [2021-11-09 08:53:40,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:53:40,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118128320] [2021-11-09 08:53:40,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:53:40,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:53:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:53:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11827 backedges. 1313 proven. 10100 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-11-09 08:53:44,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:53:44,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118128320] [2021-11-09 08:53:44,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118128320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:44,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100762926] [2021-11-09 08:53:44,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:53:44,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:53:44,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:53:44,552 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:53:44,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-11-09 08:53:48,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-09 08:53:48,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:53:48,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 08:53:48,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:53:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11827 backedges. 1349 proven. 378 refuted. 0 times theorem prover too weak. 10100 trivial. 0 not checked. [2021-11-09 08:53:50,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100762926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:50,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:53:50,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 34] total 135 [2021-11-09 08:53:50,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643628387] [2021-11-09 08:53:50,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2021-11-09 08:53:50,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:53:50,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-11-09 08:53:50,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5813, Invalid=12277, Unknown=0, NotChecked=0, Total=18090 [2021-11-09 08:53:50,511 INFO L87 Difference]: Start difference. First operand 249 states and 257 transitions. Second operand has 135 states, 135 states have (on average 1.9037037037037037) internal successors, (257), 135 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:53:55,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:53:55,717 INFO L93 Difference]: Finished difference Result 355 states and 401 transitions. [2021-11-09 08:53:55,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-11-09 08:53:55,718 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9037037037037037) internal successors, (257), 135 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 248 [2021-11-09 08:53:55,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:53:55,718 INFO L225 Difference]: With dead ends: 355 [2021-11-09 08:53:55,718 INFO L226 Difference]: Without dead ends: 308 [2021-11-09 08:53:55,724 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9192 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=18741, Invalid=36719, Unknown=0, NotChecked=0, Total=55460 [2021-11-09 08:53:55,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-09 08:53:55,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 252. [2021-11-09 08:53:55,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.0358565737051793) internal successors, (260), 251 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 08:53:55,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 260 transitions. [2021-11-09 08:53:55,761 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 260 transitions. Word has length 248 [2021-11-09 08:53:55,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:53:55,762 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 260 transitions. [2021-11-09 08:53:55,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9037037037037037) internal successors, (257), 135 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:53:55,762 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 260 transitions. [2021-11-09 08:53:55,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-09 08:53:55,763 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:53:55,764 INFO L513 BasicCegarLoop]: trace histogram [108, 101, 28, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:53:55,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-11-09 08:53:55,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:53:55,991 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:53:55,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:53:55,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2098679492, now seen corresponding path program 100 times [2021-11-09 08:53:55,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:53:55,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748345915] [2021-11-09 08:53:55,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:53:55,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:53:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:53:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12070 backedges. 1326 proven. 10302 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-09 08:53:59,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:53:59,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748345915] [2021-11-09 08:53:59,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748345915] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:59,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771981556] [2021-11-09 08:53:59,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:53:59,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:53:59,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:53:59,979 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:53:59,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-11-09 08:54:04,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:54:04,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:54:04,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-09 08:54:04,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:54:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12070 backedges. 1326 proven. 10302 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-09 08:54:04,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771981556] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:54:04,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:54:04,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 105 [2021-11-09 08:54:04,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583232636] [2021-11-09 08:54:04,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-09 08:54:04,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:54:04,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-09 08:54:04,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-09 08:54:04,894 INFO L87 Difference]: Start difference. First operand 252 states and 260 transitions. Second operand has 105 states, 105 states have (on average 2.066666666666667) internal successors, (217), 105 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:54:05,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:54:05,226 INFO L93 Difference]: Finished difference Result 302 states and 319 transitions. [2021-11-09 08:54:05,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-09 08:54:05,226 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.066666666666667) internal successors, (217), 105 states have internal predecessors, (217), 0 states have call successors, (0), 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 251 [2021-11-09 08:54:05,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:54:05,227 INFO L225 Difference]: With dead ends: 302 [2021-11-09 08:54:05,227 INFO L226 Difference]: Without dead ends: 254 [2021-11-09 08:54:05,228 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-09 08:54:05,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-09 08:54:05,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-11-09 08:54:05,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.0355731225296443) internal successors, (262), 253 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:54:05,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 262 transitions. [2021-11-09 08:54:05,249 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 262 transitions. Word has length 251 [2021-11-09 08:54:05,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:54:05,249 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 262 transitions. [2021-11-09 08:54:05,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.066666666666667) internal successors, (217), 105 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:54:05,250 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 262 transitions. [2021-11-09 08:54:05,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-09 08:54:05,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:54:05,251 INFO L513 BasicCegarLoop]: trace histogram [109, 102, 28, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:54:05,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-11-09 08:54:05,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-11-09 08:54:05,451 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:54:05,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:54:05,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1807051271, now seen corresponding path program 101 times [2021-11-09 08:54:05,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:54:05,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728852830] [2021-11-09 08:54:05,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:54:05,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:54:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:54:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12287 backedges. 1339 proven. 10506 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-09 08:54:09,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:54:09,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728852830] [2021-11-09 08:54:09,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728852830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:54:09,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673523364] [2021-11-09 08:54:09,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:54:09,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:54:09,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:54:09,645 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:54:09,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-11-09 08:54:14,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 110 check-sat command(s) [2021-11-09 08:54:14,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:54:14,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-09 08:54:14,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:54:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12287 backedges. 1339 proven. 10506 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-09 08:54:15,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673523364] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:54:15,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:54:15,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 106 [2021-11-09 08:54:15,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249504733] [2021-11-09 08:54:15,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-09 08:54:15,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:54:15,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-09 08:54:15,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2021-11-09 08:54:15,125 INFO L87 Difference]: Start difference. First operand 254 states and 262 transitions. Second operand has 106 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:54:15,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:54:15,479 INFO L93 Difference]: Finished difference Result 304 states and 321 transitions. [2021-11-09 08:54:15,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-11-09 08:54:15,480 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 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 253 [2021-11-09 08:54:15,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:54:15,481 INFO L225 Difference]: With dead ends: 304 [2021-11-09 08:54:15,481 INFO L226 Difference]: Without dead ends: 256 [2021-11-09 08:54:15,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2021-11-09 08:54:15,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-09 08:54:15,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-11-09 08:54:15,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.035294117647059) internal successors, (264), 255 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:54:15,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 264 transitions. [2021-11-09 08:54:15,522 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 264 transitions. Word has length 253 [2021-11-09 08:54:15,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:54:15,522 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 264 transitions. [2021-11-09 08:54:15,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:54:15,523 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 264 transitions. [2021-11-09 08:54:15,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-09 08:54:15,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:54:15,524 INFO L513 BasicCegarLoop]: trace histogram [110, 103, 28, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:54:15,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-11-09 08:54:15,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-11-09 08:54:15,735 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:54:15,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:54:15,736 INFO L85 PathProgramCache]: Analyzing trace with hash -725205130, now seen corresponding path program 102 times [2021-11-09 08:54:15,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:54:15,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147591102] [2021-11-09 08:54:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:54:15,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:54:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:54:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12506 backedges. 1352 proven. 10712 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-09 08:54:20,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:54:20,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147591102] [2021-11-09 08:54:20,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147591102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:54:20,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558319118] [2021-11-09 08:54:20,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:54:20,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:54:20,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:54:20,451 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:54:20,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-11-09 08:54:25,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-11-09 08:54:25,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:54:25,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 08:54:25,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:54:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12506 backedges. 1388 proven. 406 refuted. 0 times theorem prover too weak. 10712 trivial. 0 not checked. [2021-11-09 08:54:27,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558319118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:54:27,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:54:27,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 35] total 139 [2021-11-09 08:54:27,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917676121] [2021-11-09 08:54:27,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2021-11-09 08:54:27,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:54:27,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-11-09 08:54:27,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6159, Invalid=13023, Unknown=0, NotChecked=0, Total=19182 [2021-11-09 08:54:27,912 INFO L87 Difference]: Start difference. First operand 256 states and 264 transitions. Second operand has 139 states, 139 states have (on average 1.8992805755395683) internal successors, (264), 139 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:54:33,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:54:33,886 INFO L93 Difference]: Finished difference Result 363 states and 409 transitions. [2021-11-09 08:54:33,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-11-09 08:54:33,886 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.8992805755395683) internal successors, (264), 139 states have internal predecessors, (264), 0 states have call successors, (0), 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 255 [2021-11-09 08:54:33,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:54:33,887 INFO L225 Difference]: With dead ends: 363 [2021-11-09 08:54:33,887 INFO L226 Difference]: Without dead ends: 315 [2021-11-09 08:54:33,892 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9729 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=19887, Invalid=38919, Unknown=0, NotChecked=0, Total=58806 [2021-11-09 08:54:33,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-09 08:54:33,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 259. [2021-11-09 08:54:33,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.0348837209302326) internal successors, (267), 258 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:54:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 267 transitions. [2021-11-09 08:54:33,915 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 267 transitions. Word has length 255 [2021-11-09 08:54:33,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:54:33,916 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 267 transitions. [2021-11-09 08:54:33,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.8992805755395683) internal successors, (264), 139 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:54:33,916 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 267 transitions. [2021-11-09 08:54:33,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-09 08:54:33,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:54:33,917 INFO L513 BasicCegarLoop]: trace histogram [111, 104, 29, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:54:33,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-11-09 08:54:34,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-11-09 08:54:34,118 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:54:34,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:54:34,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1161059815, now seen corresponding path program 103 times [2021-11-09 08:54:34,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:54:34,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093297948] [2021-11-09 08:54:34,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:54:34,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:54:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:54:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12756 backedges. 1365 proven. 10920 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2021-11-09 08:54:38,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:54:38,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093297948] [2021-11-09 08:54:38,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093297948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:54:38,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283699358] [2021-11-09 08:54:38,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:54:38,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:54:38,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:54:38,684 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:54:38,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-11-09 08:54:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:54:43,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-09 08:54:43,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:54:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12756 backedges. 1365 proven. 10920 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2021-11-09 08:54:44,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283699358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:54:44,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:54:44,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 108 [2021-11-09 08:54:44,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770559383] [2021-11-09 08:54:44,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-09 08:54:44,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:54:44,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-09 08:54:44,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2021-11-09 08:54:44,436 INFO L87 Difference]: Start difference. First operand 259 states and 267 transitions. Second operand has 108 states, 108 states have (on average 2.064814814814815) internal successors, (223), 108 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:54:44,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:54:44,790 INFO L93 Difference]: Finished difference Result 310 states and 327 transitions. [2021-11-09 08:54:44,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-09 08:54:44,791 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.064814814814815) internal successors, (223), 108 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2021-11-09 08:54:44,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:54:44,792 INFO L225 Difference]: With dead ends: 310 [2021-11-09 08:54:44,792 INFO L226 Difference]: Without dead ends: 261 [2021-11-09 08:54:44,793 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2021-11-09 08:54:44,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-09 08:54:44,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2021-11-09 08:54:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0346153846153847) internal successors, (269), 260 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:54:44,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 269 transitions. [2021-11-09 08:54:44,817 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 269 transitions. Word has length 258 [2021-11-09 08:54:44,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:54:44,818 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 269 transitions. [2021-11-09 08:54:44,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.064814814814815) internal successors, (223), 108 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:54:44,818 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 269 transitions. [2021-11-09 08:54:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-09 08:54:44,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:54:44,819 INFO L513 BasicCegarLoop]: trace histogram [112, 105, 29, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:54:44,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-11-09 08:54:45,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-11-09 08:54:45,020 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:54:45,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:54:45,020 INFO L85 PathProgramCache]: Analyzing trace with hash -947953988, now seen corresponding path program 104 times [2021-11-09 08:54:45,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:54:45,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095022407] [2021-11-09 08:54:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:54:45,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:54:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:54:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12979 backedges. 1378 proven. 11130 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2021-11-09 08:54:49,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:54:49,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095022407] [2021-11-09 08:54:49,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095022407] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:54:49,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441083273] [2021-11-09 08:54:49,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:54:49,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:54:49,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:54:49,868 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:54:49,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-11-09 08:54:54,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:54:54,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:54:54,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-09 08:54:54,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:54:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12979 backedges. 1378 proven. 11130 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2021-11-09 08:54:55,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441083273] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:54:55,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:54:55,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 109 [2021-11-09 08:54:55,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720639037] [2021-11-09 08:54:55,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-11-09 08:54:55,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:54:55,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-11-09 08:54:55,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2021-11-09 08:54:55,555 INFO L87 Difference]: Start difference. First operand 261 states and 269 transitions. Second operand has 109 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 109 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:54:55,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:54:55,897 INFO L93 Difference]: Finished difference Result 312 states and 329 transitions. [2021-11-09 08:54:55,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-09 08:54:55,897 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 109 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2021-11-09 08:54:55,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:54:55,898 INFO L225 Difference]: With dead ends: 312 [2021-11-09 08:54:55,898 INFO L226 Difference]: Without dead ends: 263 [2021-11-09 08:54:55,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2021-11-09 08:54:55,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-09 08:54:55,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-11-09 08:54:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.034351145038168) internal successors, (271), 262 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:54:55,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 271 transitions. [2021-11-09 08:54:55,923 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 271 transitions. Word has length 260 [2021-11-09 08:54:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:54:55,923 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 271 transitions. [2021-11-09 08:54:55,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 109 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:54:55,923 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 271 transitions. [2021-11-09 08:54:55,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-09 08:54:55,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:54:55,924 INFO L513 BasicCegarLoop]: trace histogram [113, 106, 29, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:54:55,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-11-09 08:54:56,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-11-09 08:54:56,125 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:54:56,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:54:56,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1983282847, now seen corresponding path program 105 times [2021-11-09 08:54:56,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:54:56,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437831306] [2021-11-09 08:54:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:54:56,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:54:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:55:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13204 backedges. 1391 proven. 11342 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2021-11-09 08:55:00,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:55:00,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437831306] [2021-11-09 08:55:00,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437831306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:55:00,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642401117] [2021-11-09 08:55:00,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:55:00,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:55:00,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:55:00,692 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:55:00,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-11-09 08:55:05,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-09 08:55:05,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:55:05,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 08:55:05,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:55:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 13204 backedges. 1427 proven. 435 refuted. 0 times theorem prover too weak. 11342 trivial. 0 not checked. [2021-11-09 08:55:07,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642401117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:55:07,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:55:07,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 36] total 143 [2021-11-09 08:55:07,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771933567] [2021-11-09 08:55:07,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2021-11-09 08:55:07,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:55:07,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2021-11-09 08:55:07,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6515, Invalid=13791, Unknown=0, NotChecked=0, Total=20306 [2021-11-09 08:55:07,989 INFO L87 Difference]: Start difference. First operand 263 states and 271 transitions. Second operand has 143 states, 143 states have (on average 1.8951048951048952) internal successors, (271), 143 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:55:14,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:55:14,473 INFO L93 Difference]: Finished difference Result 371 states and 417 transitions. [2021-11-09 08:55:14,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-11-09 08:55:14,474 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.8951048951048952) internal successors, (271), 143 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 262 [2021-11-09 08:55:14,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:55:14,475 INFO L225 Difference]: With dead ends: 371 [2021-11-09 08:55:14,475 INFO L226 Difference]: Without dead ends: 322 [2021-11-09 08:55:14,481 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10281 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=21067, Invalid=41183, Unknown=0, NotChecked=0, Total=62250 [2021-11-09 08:55:14,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-09 08:55:14,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 266. [2021-11-09 08:55:14,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.0339622641509434) internal successors, (274), 265 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:55:14,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 274 transitions. [2021-11-09 08:55:14,506 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 274 transitions. Word has length 262 [2021-11-09 08:55:14,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:55:14,506 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 274 transitions. [2021-11-09 08:55:14,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.8951048951048952) internal successors, (271), 143 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:55:14,507 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 274 transitions. [2021-11-09 08:55:14,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-09 08:55:14,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:55:14,508 INFO L513 BasicCegarLoop]: trace histogram [114, 107, 30, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:55:14,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-11-09 08:55:14,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:55:14,708 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:55:14,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:55:14,709 INFO L85 PathProgramCache]: Analyzing trace with hash 555380714, now seen corresponding path program 106 times [2021-11-09 08:55:14,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:55:14,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015443708] [2021-11-09 08:55:14,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:55:14,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:55:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:55:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 13461 backedges. 1404 proven. 11556 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2021-11-09 08:55:19,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:55:19,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015443708] [2021-11-09 08:55:19,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015443708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:55:19,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336023711] [2021-11-09 08:55:19,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:55:19,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:55:19,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:55:19,416 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:55:19,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-11-09 08:55:24,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:55:24,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:55:24,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-09 08:55:24,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:55:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13461 backedges. 1404 proven. 11556 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2021-11-09 08:55:25,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336023711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:55:25,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:55:25,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 111 [2021-11-09 08:55:25,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108953474] [2021-11-09 08:55:25,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-11-09 08:55:25,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:55:25,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-11-09 08:55:25,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2021-11-09 08:55:25,095 INFO L87 Difference]: Start difference. First operand 266 states and 274 transitions. Second operand has 111 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:55:25,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:55:25,459 INFO L93 Difference]: Finished difference Result 318 states and 335 transitions. [2021-11-09 08:55:25,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-11-09 08:55:25,459 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 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 265 [2021-11-09 08:55:25,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:55:25,460 INFO L225 Difference]: With dead ends: 318 [2021-11-09 08:55:25,460 INFO L226 Difference]: Without dead ends: 268 [2021-11-09 08:55:25,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2021-11-09 08:55:25,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-09 08:55:25,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2021-11-09 08:55:25,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.0337078651685394) internal successors, (276), 267 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:55:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 276 transitions. [2021-11-09 08:55:25,487 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 276 transitions. Word has length 265 [2021-11-09 08:55:25,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:55:25,488 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 276 transitions. [2021-11-09 08:55:25,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:55:25,488 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 276 transitions. [2021-11-09 08:55:25,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-09 08:55:25,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:55:25,489 INFO L513 BasicCegarLoop]: trace histogram [115, 108, 30, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:55:25,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-11-09 08:55:25,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:55:25,690 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:55:25,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:55:25,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1985660391, now seen corresponding path program 107 times [2021-11-09 08:55:25,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:55:25,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170763188] [2021-11-09 08:55:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:55:25,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:55:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:55:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13690 backedges. 1417 proven. 11772 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2021-11-09 08:55:30,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:55:30,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170763188] [2021-11-09 08:55:30,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170763188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:55:30,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779885807] [2021-11-09 08:55:30,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:55:30,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:55:30,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:55:30,554 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:55:30,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-11-09 08:55:35,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 116 check-sat command(s) [2021-11-09 08:55:35,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:55:35,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 110 conjunts are in the unsatisfiable core [2021-11-09 08:55:35,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:55:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 13690 backedges. 1417 proven. 11772 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2021-11-09 08:55:36,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779885807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:55:36,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:55:36,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 112 [2021-11-09 08:55:36,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966689230] [2021-11-09 08:55:36,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-11-09 08:55:36,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:55:36,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-11-09 08:55:36,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2021-11-09 08:55:36,669 INFO L87 Difference]: Start difference. First operand 268 states and 276 transitions. Second operand has 112 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:55:37,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:55:37,045 INFO L93 Difference]: Finished difference Result 320 states and 337 transitions. [2021-11-09 08:55:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-09 08:55:37,045 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 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 267 [2021-11-09 08:55:37,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:55:37,046 INFO L225 Difference]: With dead ends: 320 [2021-11-09 08:55:37,046 INFO L226 Difference]: Without dead ends: 270 [2021-11-09 08:55:37,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2021-11-09 08:55:37,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-09 08:55:37,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2021-11-09 08:55:37,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.033457249070632) internal successors, (278), 269 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:55:37,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 278 transitions. [2021-11-09 08:55:37,073 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 278 transitions. Word has length 267 [2021-11-09 08:55:37,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:55:37,074 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 278 transitions. [2021-11-09 08:55:37,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:55:37,074 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 278 transitions. [2021-11-09 08:55:37,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-09 08:55:37,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:55:37,075 INFO L513 BasicCegarLoop]: trace histogram [116, 109, 30, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:55:37,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-11-09 08:55:37,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-11-09 08:55:37,276 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:55:37,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:55:37,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2094895268, now seen corresponding path program 108 times [2021-11-09 08:55:37,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:55:37,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484278156] [2021-11-09 08:55:37,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:55:37,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:55:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:55:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 13921 backedges. 1430 proven. 11990 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2021-11-09 08:55:42,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:55:42,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484278156] [2021-11-09 08:55:42,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484278156] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:55:42,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984832953] [2021-11-09 08:55:42,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:55:42,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:55:42,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:55:42,354 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:55:42,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-11-09 08:55:46,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-11-09 08:55:46,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:55:46,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 08:55:46,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:55:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13921 backedges. 1466 proven. 465 refuted. 0 times theorem prover too weak. 11990 trivial. 0 not checked. [2021-11-09 08:55:49,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984832953] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:55:49,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:55:49,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 37] total 147 [2021-11-09 08:55:49,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85407454] [2021-11-09 08:55:49,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2021-11-09 08:55:49,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:55:49,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2021-11-09 08:55:49,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6881, Invalid=14581, Unknown=0, NotChecked=0, Total=21462 [2021-11-09 08:55:49,488 INFO L87 Difference]: Start difference. First operand 270 states and 278 transitions. Second operand has 147 states, 147 states have (on average 1.8911564625850341) internal successors, (278), 147 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:55:56,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:55:56,506 INFO L93 Difference]: Finished difference Result 379 states and 425 transitions. [2021-11-09 08:55:56,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-11-09 08:55:56,507 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.8911564625850341) internal successors, (278), 147 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2021-11-09 08:55:56,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:55:56,508 INFO L225 Difference]: With dead ends: 379 [2021-11-09 08:55:56,508 INFO L226 Difference]: Without dead ends: 329 [2021-11-09 08:55:56,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10848 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=22281, Invalid=43511, Unknown=0, NotChecked=0, Total=65792 [2021-11-09 08:55:56,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-09 08:55:56,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 273. [2021-11-09 08:55:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.0330882352941178) internal successors, (281), 272 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:55:56,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 281 transitions. [2021-11-09 08:55:56,545 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 281 transitions. Word has length 269 [2021-11-09 08:55:56,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:55:56,546 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 281 transitions. [2021-11-09 08:55:56,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.8911564625850341) internal successors, (278), 147 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:55:56,546 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 281 transitions. [2021-11-09 08:55:56,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-09 08:55:56,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:55:56,547 INFO L513 BasicCegarLoop]: trace histogram [117, 110, 31, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:55:56,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-11-09 08:55:56,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-11-09 08:55:56,748 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:55:56,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:55:56,749 INFO L85 PathProgramCache]: Analyzing trace with hash -850080405, now seen corresponding path program 109 times [2021-11-09 08:55:56,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:55:56,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195275074] [2021-11-09 08:55:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:55:56,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:55:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:56:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14185 backedges. 1443 proven. 12210 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-09 08:56:01,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:56:01,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195275074] [2021-11-09 08:56:01,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195275074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:56:01,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351467560] [2021-11-09 08:56:01,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:56:01,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:56:01,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:56:01,532 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:56:01,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-11-09 08:56:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:56:06,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-09 08:56:06,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:56:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14185 backedges. 1443 proven. 12210 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-09 08:56:07,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351467560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:56:07,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:56:07,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 114 [2021-11-09 08:56:07,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564878374] [2021-11-09 08:56:07,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-11-09 08:56:07,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:56:07,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-11-09 08:56:07,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2021-11-09 08:56:07,294 INFO L87 Difference]: Start difference. First operand 273 states and 281 transitions. Second operand has 114 states, 114 states have (on average 2.06140350877193) internal successors, (235), 114 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:56:07,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:56:07,666 INFO L93 Difference]: Finished difference Result 326 states and 343 transitions. [2021-11-09 08:56:07,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-11-09 08:56:07,667 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.06140350877193) internal successors, (235), 114 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 272 [2021-11-09 08:56:07,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:56:07,668 INFO L225 Difference]: With dead ends: 326 [2021-11-09 08:56:07,668 INFO L226 Difference]: Without dead ends: 275 [2021-11-09 08:56:07,669 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2021-11-09 08:56:07,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-09 08:56:07,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2021-11-09 08:56:07,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.032846715328467) internal successors, (283), 274 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:56:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 283 transitions. [2021-11-09 08:56:07,698 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 283 transitions. Word has length 272 [2021-11-09 08:56:07,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:56:07,698 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 283 transitions. [2021-11-09 08:56:07,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.06140350877193) internal successors, (235), 114 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:56:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 283 transitions. [2021-11-09 08:56:07,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-09 08:56:07,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:56:07,700 INFO L513 BasicCegarLoop]: trace histogram [118, 111, 31, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:56:07,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-11-09 08:56:07,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-11-09 08:56:07,900 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:56:07,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:56:07,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2105815246, now seen corresponding path program 110 times [2021-11-09 08:56:07,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:56:07,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105758349] [2021-11-09 08:56:07,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:56:07,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:56:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:56:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 14420 backedges. 1456 proven. 12432 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-09 08:56:13,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:56:13,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105758349] [2021-11-09 08:56:13,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105758349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:56:13,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496189172] [2021-11-09 08:56:13,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:56:13,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:56:13,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:56:13,298 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:56:13,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-11-09 08:56:19,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:56:19,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:56:19,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-09 08:56:19,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:56:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 14420 backedges. 1456 proven. 12432 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-09 08:56:20,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496189172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:56:20,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:56:20,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 115 [2021-11-09 08:56:20,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919642834] [2021-11-09 08:56:20,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-11-09 08:56:20,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:56:20,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-11-09 08:56:20,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2021-11-09 08:56:20,117 INFO L87 Difference]: Start difference. First operand 275 states and 283 transitions. Second operand has 115 states, 115 states have (on average 2.0608695652173914) internal successors, (237), 115 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:56:20,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:56:20,485 INFO L93 Difference]: Finished difference Result 328 states and 345 transitions. [2021-11-09 08:56:20,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-11-09 08:56:20,485 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0608695652173914) internal successors, (237), 115 states have internal predecessors, (237), 0 states have call successors, (0), 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 274 [2021-11-09 08:56:20,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:56:20,486 INFO L225 Difference]: With dead ends: 328 [2021-11-09 08:56:20,486 INFO L226 Difference]: Without dead ends: 277 [2021-11-09 08:56:20,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2021-11-09 08:56:20,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-09 08:56:20,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2021-11-09 08:56:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.0326086956521738) internal successors, (285), 276 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:56:20,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 285 transitions. [2021-11-09 08:56:20,515 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 285 transitions. Word has length 274 [2021-11-09 08:56:20,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:56:20,515 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 285 transitions. [2021-11-09 08:56:20,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.0608695652173914) internal successors, (237), 115 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:56:20,516 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 285 transitions. [2021-11-09 08:56:20,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-11-09 08:56:20,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:56:20,517 INFO L513 BasicCegarLoop]: trace histogram [119, 112, 31, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:56:20,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-11-09 08:56:20,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-11-09 08:56:20,718 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:56:20,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:56:20,718 INFO L85 PathProgramCache]: Analyzing trace with hash -546814095, now seen corresponding path program 111 times [2021-11-09 08:56:20,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:56:20,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287386892] [2021-11-09 08:56:20,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:56:20,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:56:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:56:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 14657 backedges. 1469 proven. 12656 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-09 08:56:26,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:56:26,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287386892] [2021-11-09 08:56:26,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287386892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:56:26,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417432526] [2021-11-09 08:56:26,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:56:26,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:56:26,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:56:26,172 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:56:26,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-11-09 08:56:31,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-09 08:56:31,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:56:31,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:56:31,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:56:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 14657 backedges. 1680 proven. 49 refuted. 0 times theorem prover too weak. 12928 trivial. 0 not checked. [2021-11-09 08:56:32,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417432526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:56:32,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:56:32,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 10] total 123 [2021-11-09 08:56:32,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446654368] [2021-11-09 08:56:32,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-09 08:56:32,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:56:32,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-09 08:56:32,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2021-11-09 08:56:32,334 INFO L87 Difference]: Start difference. First operand 277 states and 285 transitions. Second operand has 123 states, 123 states have (on average 2.073170731707317) internal successors, (255), 123 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:56:32,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:56:32,897 INFO L93 Difference]: Finished difference Result 333 states and 353 transitions. [2021-11-09 08:56:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-09 08:56:32,898 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.073170731707317) internal successors, (255), 123 states have internal predecessors, (255), 0 states have call successors, (0), 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 276 [2021-11-09 08:56:32,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:56:32,899 INFO L225 Difference]: With dead ends: 333 [2021-11-09 08:56:32,899 INFO L226 Difference]: Without dead ends: 282 [2021-11-09 08:56:32,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2021-11-09 08:56:32,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-09 08:56:32,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2021-11-09 08:56:32,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.0357142857142858) internal successors, (290), 280 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:56:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 290 transitions. [2021-11-09 08:56:32,928 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 290 transitions. Word has length 276 [2021-11-09 08:56:32,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:56:32,928 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 290 transitions. [2021-11-09 08:56:32,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.073170731707317) internal successors, (255), 123 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:56:32,929 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 290 transitions. [2021-11-09 08:56:32,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-11-09 08:56:32,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:56:32,930 INFO L513 BasicCegarLoop]: trace histogram [121, 113, 31, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:56:32,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-11-09 08:56:33,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-11-09 08:56:33,131 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:56:33,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:56:33,131 INFO L85 PathProgramCache]: Analyzing trace with hash -291927559, now seen corresponding path program 112 times [2021-11-09 08:56:33,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:56:33,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614377250] [2021-11-09 08:56:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:56:33,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:56:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:56:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 15137 backedges. 1710 proven. 12882 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2021-11-09 08:56:37,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:56:37,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614377250] [2021-11-09 08:56:37,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614377250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:56:37,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249615710] [2021-11-09 08:56:37,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:56:37,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:56:37,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:56:37,895 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:56:37,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-11-09 08:56:42,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:56:42,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:56:42,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 115 conjunts are in the unsatisfiable core [2021-11-09 08:56:42,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:56:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 15137 backedges. 1710 proven. 12882 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2021-11-09 08:56:43,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249615710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:56:43,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:56:43,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 117 [2021-11-09 08:56:43,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930385686] [2021-11-09 08:56:43,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2021-11-09 08:56:43,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:56:43,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-11-09 08:56:43,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2021-11-09 08:56:43,617 INFO L87 Difference]: Start difference. First operand 281 states and 290 transitions. Second operand has 117 states, 117 states have (on average 2.0598290598290596) internal successors, (241), 117 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:56:43,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:56:43,965 INFO L93 Difference]: Finished difference Result 336 states and 355 transitions. [2021-11-09 08:56:43,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-11-09 08:56:43,966 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0598290598290596) internal successors, (241), 117 states have internal predecessors, (241), 0 states have call successors, (0), 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 280 [2021-11-09 08:56:43,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:56:43,967 INFO L225 Difference]: With dead ends: 336 [2021-11-09 08:56:43,967 INFO L226 Difference]: Without dead ends: 283 [2021-11-09 08:56:43,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2021-11-09 08:56:43,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-09 08:56:43,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2021-11-09 08:56:43,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.0354609929078014) internal successors, (292), 282 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:56:43,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 292 transitions. [2021-11-09 08:56:43,996 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 292 transitions. Word has length 280 [2021-11-09 08:56:43,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:56:43,996 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 292 transitions. [2021-11-09 08:56:43,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0598290598290596) internal successors, (241), 117 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:56:43,997 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 292 transitions. [2021-11-09 08:56:43,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-09 08:56:43,998 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:56:43,998 INFO L513 BasicCegarLoop]: trace histogram [122, 114, 31, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:56:44,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-11-09 08:56:44,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f38d014-7a66-4c4f-9803-906a08afd77f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:56:44,198 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:56:44,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:56:44,199 INFO L85 PathProgramCache]: Analyzing trace with hash -852698532, now seen corresponding path program 113 times [2021-11-09 08:56:44,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:56:44,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964193631] [2021-11-09 08:56:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:56:44,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:56:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat