./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU --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 cfe6fce904e7772b92437e018e53dfef745de1dd85f6147cfc72edd062333cfd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:00:54,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:00:54,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:00:54,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:00:54,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:00:54,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:00:54,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:00:54,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:00:54,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:00:54,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:00:54,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:00:54,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:00:54,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:00:54,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:00:54,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:00:54,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:00:54,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:00:54,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:00:54,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:00:54,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:00:54,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:00:54,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:00:54,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:00:54,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:00:54,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:00:54,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:00:54,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:00:54,898 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:00:54,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:00:54,900 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:00:54,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:00:54,901 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:00:54,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:00:54,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:00:54,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:00:54,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:00:54,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:00:54,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:00:54,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:00:54,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:00:54,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:00:54,912 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:00:54,959 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:00:54,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:00:54,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:00:54,962 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:00:54,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:00:54,970 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:00:54,970 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:00:54,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:00:54,971 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:00:54,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:00:54,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:00:54,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:00:54,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:00:54,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:00:54,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:00:54,973 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:00:54,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:00:54,974 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:00:54,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:00:54,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:00:54,974 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:00:54,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:00:54,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:00:54,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:00:54,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:00:54,976 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:00:54,976 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:00:54,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:00:54,976 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:00:54,977 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:00:54,977 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:00:54,977 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:00:54,977 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_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cfe6fce904e7772b92437e018e53dfef745de1dd85f6147cfc72edd062333cfd [2021-11-02 23:00:55,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:00:55,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:00:55,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:00:55,333 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:00:55,334 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:00:55,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/loops-crafted-1/in-de20.c [2021-11-02 23:00:55,411 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/data/809d7b1da/12bf8e532f554dc1bb315df5dbd99d35/FLAG0cd6c907e [2021-11-02 23:00:55,931 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:00:55,932 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/sv-benchmarks/c/loops-crafted-1/in-de20.c [2021-11-02 23:00:55,944 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/data/809d7b1da/12bf8e532f554dc1bb315df5dbd99d35/FLAG0cd6c907e [2021-11-02 23:00:56,310 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/data/809d7b1da/12bf8e532f554dc1bb315df5dbd99d35 [2021-11-02 23:00:56,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:00:56,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:00:56,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:00:56,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:00:56,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:00:56,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:00:56" (1/1) ... [2021-11-02 23:00:56,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67a35171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:56, skipping insertion in model container [2021-11-02 23:00:56,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:00:56" (1/1) ... [2021-11-02 23:00:56,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:00:56,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:00:56,499 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_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/sv-benchmarks/c/loops-crafted-1/in-de20.c[368,381] [2021-11-02 23:00:56,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:00:56,527 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:00:56,537 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_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/sv-benchmarks/c/loops-crafted-1/in-de20.c[368,381] [2021-11-02 23:00:56,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:00:56,550 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:00:56,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:56 WrapperNode [2021-11-02 23:00:56,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:00:56,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:00:56,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:00:56,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:00:56,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:56" (1/1) ... [2021-11-02 23:00:56,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:56" (1/1) ... [2021-11-02 23:00:56,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:00:56,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:00:56,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:00:56,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:00:56,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:56" (1/1) ... [2021-11-02 23:00:56,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:56" (1/1) ... [2021-11-02 23:00:56,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:56" (1/1) ... [2021-11-02 23:00:56,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:56" (1/1) ... [2021-11-02 23:00:56,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:56" (1/1) ... [2021-11-02 23:00:56,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:56" (1/1) ... [2021-11-02 23:00:56,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:56" (1/1) ... [2021-11-02 23:00:56,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:00:56,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:00:56,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:00:56,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:00:56,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:56" (1/1) ... [2021-11-02 23:00:56,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:00:56,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:00:56,664 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:00:56,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:00:56,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:00:56,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:00:56,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:00:56,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:00:56,955 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:00:56,955 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-02 23:00:56,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:00:56 BoogieIcfgContainer [2021-11-02 23:00:56,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:00:56,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:00:56,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:00:56,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:00:56,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:00:56" (1/3) ... [2021-11-02 23:00:56,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5e13b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:00:56, skipping insertion in model container [2021-11-02 23:00:56,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:56" (2/3) ... [2021-11-02 23:00:56,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5e13b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:00:56, skipping insertion in model container [2021-11-02 23:00:56,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:00:56" (3/3) ... [2021-11-02 23:00:56,969 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de20.c [2021-11-02 23:00:56,974 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:00:56,975 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 23:00:57,037 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:00:57,047 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 [2021-11-02 23:00:57,048 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 23:00:57,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:57,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-02 23:00:57,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:57,074 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:00:57,075 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:00:57,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:57,081 INFO L85 PathProgramCache]: Analyzing trace with hash 239751377, now seen corresponding path program 1 times [2021-11-02 23:00:57,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:00:57,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483149373] [2021-11-02 23:00:57,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:57,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:00:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:57,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:00:57,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483149373] [2021-11-02 23:00:57,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483149373] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:00:57,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:00:57,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:00:57,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166512837] [2021-11-02 23:00:57,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:00:57,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:00:57,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:00:57,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:00:57,490 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:57,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:57,584 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-11-02 23:00:57,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:00:57,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-02 23:00:57,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:57,593 INFO L225 Difference]: With dead ends: 32 [2021-11-02 23:00:57,593 INFO L226 Difference]: Without dead ends: 12 [2021-11-02 23:00:57,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:00:57,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-02 23:00:57,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-02 23:00:57,623 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) [2021-11-02 23:00:57,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-02 23:00:57,625 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2021-11-02 23:00:57,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:57,625 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-02 23:00:57,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:57,626 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-02 23:00:57,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 23:00:57,626 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:57,627 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:00:57,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:00:57,627 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:00:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:57,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1155976521, now seen corresponding path program 1 times [2021-11-02 23:00:57,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:00:57,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978281811] [2021-11-02 23:00:57,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:57,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:00:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:57,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:00:57,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978281811] [2021-11-02 23:00:57,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978281811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:00:57,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:00:57,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:00:57,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768422435] [2021-11-02 23:00:57,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:00:57,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:00:57,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:00:57,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:00:57,693 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2021-11-02 23:00:57,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:57,719 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2021-11-02 23:00:57,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:00:57,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 [2021-11-02 23:00:57,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:57,721 INFO L225 Difference]: With dead ends: 17 [2021-11-02 23:00:57,721 INFO L226 Difference]: Without dead ends: 10 [2021-11-02 23:00:57,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:00:57,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-02 23:00:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-02 23:00:57,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2021-11-02 23:00:57,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-02 23:00:57,725 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 9 [2021-11-02 23:00:57,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:57,726 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-02 23:00:57,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2021-11-02 23:00:57,726 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-02 23:00:57,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 23:00:57,727 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:57,727 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:00:57,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:00:57,728 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:00:57,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:57,729 INFO L85 PathProgramCache]: Analyzing trace with hash 438944246, now seen corresponding path program 1 times [2021-11-02 23:00:57,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:00:57,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405344312] [2021-11-02 23:00:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:57,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:00:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:57,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:00:57,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405344312] [2021-11-02 23:00:57,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405344312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:00:57,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075446734] [2021-11-02 23:00:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:57,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:57,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:00:57,817 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:00:57,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:00:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:57,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:00:57,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:00:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:57,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075446734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:00:57,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:00:57,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-02 23:00:57,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135168527] [2021-11-02 23:00:57,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:00:57,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:00:57,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:00:57,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:00:57,992 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2021-11-02 23:00:58,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:58,023 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-11-02 23:00:58,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:00:58,024 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 9 [2021-11-02 23:00:58,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:58,025 INFO L225 Difference]: With dead ends: 22 [2021-11-02 23:00:58,025 INFO L226 Difference]: Without dead ends: 18 [2021-11-02 23:00:58,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:00:58,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-02 23:00:58,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2021-11-02 23:00:58,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:58,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-02 23:00:58,029 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2021-11-02 23:00:58,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:58,029 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-02 23:00:58,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2021-11-02 23:00:58,030 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-02 23:00:58,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 23:00:58,031 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:58,031 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:00:58,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:00:58,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:58,256 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:00:58,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:58,257 INFO L85 PathProgramCache]: Analyzing trace with hash 724035122, now seen corresponding path program 1 times [2021-11-02 23:00:58,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:00:58,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83413121] [2021-11-02 23:00:58,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:58,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:00:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:58,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:00:58,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83413121] [2021-11-02 23:00:58,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83413121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:00:58,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744828678] [2021-11-02 23:00:58,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:58,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:58,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:00:58,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:00:58,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:00:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:58,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:00:58,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:00:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:58,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744828678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:00:58,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:00:58,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2021-11-02 23:00:58,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094372445] [2021-11-02 23:00:58,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:00:58,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:00:58,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:00:58,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:00:58,773 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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) [2021-11-02 23:00:58,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:58,831 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-11-02 23:00:58,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:00:58,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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) Word has length 10 [2021-11-02 23:00:58,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:58,832 INFO L225 Difference]: With dead ends: 18 [2021-11-02 23:00:58,832 INFO L226 Difference]: Without dead ends: 14 [2021-11-02 23:00:58,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:00:58,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-02 23:00:58,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-02 23:00:58,840 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) [2021-11-02 23:00:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-02 23:00:58,841 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2021-11-02 23:00:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:58,841 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-02 23:00:58,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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) [2021-11-02 23:00:58,842 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-02 23:00:58,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 23:00:58,842 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:58,843 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:00:58,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:00:59,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:59,066 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:00:59,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:59,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1976011407, now seen corresponding path program 2 times [2021-11-02 23:00:59,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:00:59,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141081348] [2021-11-02 23:00:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:59,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:00:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:59,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:00:59,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141081348] [2021-11-02 23:00:59,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141081348] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:00:59,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351780185] [2021-11-02 23:00:59,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:00:59,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:59,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:00:59,150 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:00:59,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:00:59,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:00:59,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:00:59,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:00:59,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:00:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:59,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351780185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:00:59,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:00:59,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-02 23:00:59,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562019789] [2021-11-02 23:00:59,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:00:59,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:00:59,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:00:59,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:00:59,275 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:59,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:59,309 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-11-02 23:00:59,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:00:59,310 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-02 23:00:59,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:59,311 INFO L225 Difference]: With dead ends: 31 [2021-11-02 23:00:59,311 INFO L226 Difference]: Without dead ends: 27 [2021-11-02 23:00:59,311 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:00:59,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-02 23:00:59,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2021-11-02 23:00:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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) [2021-11-02 23:00:59,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-02 23:00:59,315 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2021-11-02 23:00:59,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:59,315 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-02 23:00:59,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:59,316 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-02 23:00:59,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 23:00:59,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:59,317 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:00:59,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:00:59,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:59,544 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:00:59,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:59,544 INFO L85 PathProgramCache]: Analyzing trace with hash 971917686, now seen corresponding path program 2 times [2021-11-02 23:00:59,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:00:59,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968504923] [2021-11-02 23:00:59,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:59,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:00:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:59,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:00:59,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968504923] [2021-11-02 23:00:59,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968504923] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:00:59,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017675239] [2021-11-02 23:00:59,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:00:59,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:59,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:00:59,611 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:00:59,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:00:59,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:00:59,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:00:59,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:00:59,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:00:59,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:59,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017675239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:00:59,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:00:59,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-11-02 23:00:59,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076657805] [2021-11-02 23:00:59,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:00:59,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:00:59,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:00:59,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:00:59,777 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2021-11-02 23:00:59,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:59,855 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-11-02 23:00:59,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:00:59,856 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 11 [2021-11-02 23:00:59,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:59,856 INFO L225 Difference]: With dead ends: 22 [2021-11-02 23:00:59,856 INFO L226 Difference]: Without dead ends: 14 [2021-11-02 23:00:59,857 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:00:59,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-02 23:00:59,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-02 23:00:59,859 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) [2021-11-02 23:00:59,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-02 23:00:59,860 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2021-11-02 23:00:59,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:59,860 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-02 23:00:59,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2021-11-02 23:00:59,861 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-02 23:00:59,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 23:00:59,862 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:59,862 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:00:59,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:00,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:00,063 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:00,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:00,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1125146089, now seen corresponding path program 3 times [2021-11-02 23:01:00,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:00,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830720825] [2021-11-02 23:01:00,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:00,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:00,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:00,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830720825] [2021-11-02 23:01:00,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830720825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:00,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950770875] [2021-11-02 23:01:00,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:01:00,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:00,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:00,183 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:00,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:01:00,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 23:01:00,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:00,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:01:00,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:00,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950770875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:00,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:00,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-02 23:01:00,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913090548] [2021-11-02 23:01:00,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:01:00,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:00,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:01:00,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:01:00,335 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2021-11-02 23:01:00,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:00,386 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-11-02 23:01:00,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:01:00,387 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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 11 [2021-11-02 23:01:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:00,388 INFO L225 Difference]: With dead ends: 24 [2021-11-02 23:01:00,388 INFO L226 Difference]: Without dead ends: 20 [2021-11-02 23:01:00,388 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:01:00,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-02 23:01:00,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2021-11-02 23:01:00,391 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) [2021-11-02 23:01:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-02 23:01:00,392 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-11-02 23:01:00,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:00,392 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-02 23:01:00,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2021-11-02 23:01:00,393 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-02 23:01:00,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 23:01:00,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:00,394 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:00,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:00,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:00,608 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:00,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:00,609 INFO L85 PathProgramCache]: Analyzing trace with hash 469774678, now seen corresponding path program 3 times [2021-11-02 23:01:00,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:00,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908383863] [2021-11-02 23:01:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:00,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:00,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:00,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908383863] [2021-11-02 23:01:00,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908383863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:00,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963302604] [2021-11-02 23:01:00,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:01:00,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:00,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:00,681 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:00,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:01:00,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 23:01:00,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:00,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:01:00,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:00,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963302604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:00,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:00,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-02 23:01:00,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406470817] [2021-11-02 23:01:00,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:01:00,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:00,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:01:00,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:01:00,859 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2021-11-02 23:01:00,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:00,897 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-11-02 23:01:00,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:01:00,898 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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 11 [2021-11-02 23:01:00,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:00,899 INFO L225 Difference]: With dead ends: 32 [2021-11-02 23:01:00,899 INFO L226 Difference]: Without dead ends: 28 [2021-11-02 23:01:00,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:01:00,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-02 23:01:00,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 17. [2021-11-02 23:01:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:00,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-02 23:01:00,916 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2021-11-02 23:01:00,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:00,916 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-02 23:01:00,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2021-11-02 23:01:00,917 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-02 23:01:00,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 23:01:00,918 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:00,918 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:00,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:01,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:01,143 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:01,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:01,144 INFO L85 PathProgramCache]: Analyzing trace with hash -518125007, now seen corresponding path program 4 times [2021-11-02 23:01:01,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:01,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697046913] [2021-11-02 23:01:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:01,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:01,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:01,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697046913] [2021-11-02 23:01:01,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697046913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:01,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411325065] [2021-11-02 23:01:01,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:01:01,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:01,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:01,406 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:01,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:01:01,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:01:01,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:01,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:01:01,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:01,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411325065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:01,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:01,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2021-11-02 23:01:01,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146733938] [2021-11-02 23:01:01,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:01:01,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:01,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:01:01,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:01:01,825 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2021-11-02 23:01:01,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:01,895 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-11-02 23:01:01,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:01:01,896 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) Word has length 12 [2021-11-02 23:01:01,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:01,898 INFO L225 Difference]: With dead ends: 23 [2021-11-02 23:01:01,898 INFO L226 Difference]: Without dead ends: 19 [2021-11-02 23:01:01,898 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:01:01,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-02 23:01:01,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-11-02 23:01:01,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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) [2021-11-02 23:01:01,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-02 23:01:01,903 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2021-11-02 23:01:01,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:01,904 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-02 23:01:01,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2021-11-02 23:01:01,904 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-02 23:01:01,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 23:01:01,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:01,905 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:01,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:02,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:02,119 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:02,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:02,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1679778514, now seen corresponding path program 5 times [2021-11-02 23:01:02,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:02,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158154517] [2021-11-02 23:01:02,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:02,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:02,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:02,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158154517] [2021-11-02 23:01:02,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158154517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:02,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353972023] [2021-11-02 23:01:02,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:01:02,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:02,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:02,223 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:02,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 23:01:02,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-02 23:01:02,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:02,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:01:02,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:02,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353972023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:02,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:02,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-02 23:01:02,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183545078] [2021-11-02 23:01:02,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:01:02,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:02,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:01:02,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:01:02,410 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-11-02 23:01:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:02,485 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-11-02 23:01:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:01:02,487 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-02 23:01:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:02,488 INFO L225 Difference]: With dead ends: 34 [2021-11-02 23:01:02,488 INFO L226 Difference]: Without dead ends: 30 [2021-11-02 23:01:02,489 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:01:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-02 23:01:02,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2021-11-02 23:01:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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) [2021-11-02 23:01:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-02 23:01:02,493 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2021-11-02 23:01:02,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:02,493 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-02 23:01:02,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-11-02 23:01:02,494 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-02 23:01:02,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 23:01:02,495 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:02,495 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:02,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:02,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 23:01:02,716 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:02,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:02,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1020268015, now seen corresponding path program 4 times [2021-11-02 23:01:02,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:02,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460239505] [2021-11-02 23:01:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:02,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:02,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:02,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460239505] [2021-11-02 23:01:02,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460239505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:02,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621312419] [2021-11-02 23:01:02,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:01:02,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:02,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:02,819 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:02,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 23:01:02,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:01:02,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:02,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:01:02,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:02,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621312419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:02,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:02,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-02 23:01:03,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602626238] [2021-11-02 23:01:03,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:01:03,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:03,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:01:03,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:01:03,004 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-11-02 23:01:03,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:03,071 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-11-02 23:01:03,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:01:03,072 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-02 23:01:03,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:03,074 INFO L225 Difference]: With dead ends: 42 [2021-11-02 23:01:03,074 INFO L226 Difference]: Without dead ends: 38 [2021-11-02 23:01:03,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:01:03,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-02 23:01:03,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 20. [2021-11-02 23:01:03,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2021-11-02 23:01:03,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-02 23:01:03,084 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2021-11-02 23:01:03,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:03,084 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-02 23:01:03,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-11-02 23:01:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-02 23:01:03,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 23:01:03,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:03,086 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:03,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:03,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 23:01:03,311 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:03,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:03,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1119659351, now seen corresponding path program 6 times [2021-11-02 23:01:03,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:03,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603407572] [2021-11-02 23:01:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:03,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:03,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:03,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603407572] [2021-11-02 23:01:03,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603407572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:03,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516164739] [2021-11-02 23:01:03,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:01:03,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:03,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:03,396 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:03,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 23:01:03,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-02 23:01:03,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:03,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:01:03,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:03,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516164739] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:03,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:03,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-11-02 23:01:03,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6623921] [2021-11-02 23:01:03,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:01:03,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:03,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:01:03,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:01:03,597 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:03,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:03,661 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-11-02 23:01:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:01:03,662 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-02 23:01:03,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:03,662 INFO L225 Difference]: With dead ends: 27 [2021-11-02 23:01:03,662 INFO L226 Difference]: Without dead ends: 18 [2021-11-02 23:01:03,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:01:03,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-02 23:01:03,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-02 23:01:03,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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) [2021-11-02 23:01:03,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-02 23:01:03,666 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2021-11-02 23:01:03,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:03,667 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-02 23:01:03,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:03,667 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-02 23:01:03,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 23:01:03,668 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:03,668 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:03,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:03,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-02 23:01:03,883 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:03,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:03,884 INFO L85 PathProgramCache]: Analyzing trace with hash 535191766, now seen corresponding path program 7 times [2021-11-02 23:01:03,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:03,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198956125] [2021-11-02 23:01:03,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:03,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:03,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:03,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198956125] [2021-11-02 23:01:03,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198956125] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:03,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745799498] [2021-11-02 23:01:03,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:01:03,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:03,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:03,998 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:04,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 23:01:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:04,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:01:04,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:04,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745799498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:04,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:04,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-02 23:01:04,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049682624] [2021-11-02 23:01:04,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:01:04,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:04,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:01:04,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:01:04,200 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:04,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:04,278 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-11-02 23:01:04,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:01:04,279 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-02 23:01:04,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:04,280 INFO L225 Difference]: With dead ends: 29 [2021-11-02 23:01:04,280 INFO L226 Difference]: Without dead ends: 25 [2021-11-02 23:01:04,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:01:04,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-02 23:01:04,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2021-11-02 23:01:04,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-02 23:01:04,289 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2021-11-02 23:01:04,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:04,289 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-02 23:01:04,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:04,290 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-02 23:01:04,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 23:01:04,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:04,291 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:04,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:04,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 23:01:04,511 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:04,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1561872009, now seen corresponding path program 8 times [2021-11-02 23:01:04,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:04,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223410673] [2021-11-02 23:01:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:04,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:04,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:04,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:04,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223410673] [2021-11-02 23:01:04,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223410673] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:04,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986651179] [2021-11-02 23:01:04,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:01:04,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:04,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:04,626 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:04,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 23:01:04,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:01:04,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:04,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:01:04,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:04,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986651179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:04,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:04,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-02 23:01:04,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451158140] [2021-11-02 23:01:04,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:01:04,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:04,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:01:04,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:01:04,844 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:04,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:04,928 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-11-02 23:01:04,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:01:04,929 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-02 23:01:04,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:04,932 INFO L225 Difference]: With dead ends: 35 [2021-11-02 23:01:04,932 INFO L226 Difference]: Without dead ends: 31 [2021-11-02 23:01:04,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:01:04,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-02 23:01:04,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2021-11-02 23:01:04,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-02 23:01:04,938 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2021-11-02 23:01:04,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:04,939 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-02 23:01:04,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-02 23:01:04,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 23:01:04,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:04,941 INFO L513 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:04,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:05,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:05,167 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:05,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:05,168 INFO L85 PathProgramCache]: Analyzing trace with hash 33048758, now seen corresponding path program 5 times [2021-11-02 23:01:05,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:05,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653756843] [2021-11-02 23:01:05,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:05,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:05,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:05,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653756843] [2021-11-02 23:01:05,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653756843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:05,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31848749] [2021-11-02 23:01:05,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:01:05,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:05,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:05,261 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:05,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 23:01:05,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-02 23:01:05,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:05,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:01:05,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:05,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31848749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:05,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:05,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-02 23:01:05,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697613709] [2021-11-02 23:01:05,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:01:05,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:05,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:01:05,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:01:05,487 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:05,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:05,559 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-11-02 23:01:05,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:01:05,559 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-02 23:01:05,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:05,560 INFO L225 Difference]: With dead ends: 43 [2021-11-02 23:01:05,560 INFO L226 Difference]: Without dead ends: 39 [2021-11-02 23:01:05,560 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:01:05,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-02 23:01:05,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 21. [2021-11-02 23:01:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2021-11-02 23:01:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-02 23:01:05,564 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2021-11-02 23:01:05,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:05,564 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-02 23:01:05,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:05,564 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-02 23:01:05,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 23:01:05,565 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:05,565 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:05,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:05,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 23:01:05,778 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:05,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:05,778 INFO L85 PathProgramCache]: Analyzing trace with hash -587259054, now seen corresponding path program 9 times [2021-11-02 23:01:05,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:05,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462694369] [2021-11-02 23:01:05,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:05,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:06,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:06,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462694369] [2021-11-02 23:01:06,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462694369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:06,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575330935] [2021-11-02 23:01:06,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:01:06,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:06,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:06,036 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:06,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 23:01:06,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 23:01:06,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:06,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:01:06,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:06,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575330935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:06,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:06,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2021-11-02 23:01:06,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421851273] [2021-11-02 23:01:06,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:01:06,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:06,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:01:06,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:01:06,284 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-11-02 23:01:06,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:06,377 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-02 23:01:06,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:01:06,378 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 14 [2021-11-02 23:01:06,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:06,378 INFO L225 Difference]: With dead ends: 28 [2021-11-02 23:01:06,378 INFO L226 Difference]: Without dead ends: 24 [2021-11-02 23:01:06,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:01:06,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-02 23:01:06,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-11-02 23:01:06,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:01:06,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-02 23:01:06,383 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2021-11-02 23:01:06,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:06,383 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-02 23:01:06,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-11-02 23:01:06,383 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-02 23:01:06,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 23:01:06,384 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:06,384 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:06,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-02 23:01:06,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 23:01:06,603 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:06,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:06,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1171726639, now seen corresponding path program 10 times [2021-11-02 23:01:06,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:06,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816057552] [2021-11-02 23:01:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:06,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:06,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:06,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816057552] [2021-11-02 23:01:06,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816057552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:06,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408101469] [2021-11-02 23:01:06,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:01:06,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:06,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:06,715 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:06,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 23:01:06,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:01:06,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:06,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:01:06,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:06,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408101469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:06,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:06,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-02 23:01:06,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024404216] [2021-11-02 23:01:06,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:01:06,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:06,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:01:06,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:01:06,929 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2021-11-02 23:01:07,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:07,046 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-11-02 23:01:07,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:01:07,047 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) Word has length 14 [2021-11-02 23:01:07,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:07,047 INFO L225 Difference]: With dead ends: 40 [2021-11-02 23:01:07,048 INFO L226 Difference]: Without dead ends: 36 [2021-11-02 23:01:07,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:01:07,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-02 23:01:07,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2021-11-02 23:01:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:01:07,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-02 23:01:07,058 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2021-11-02 23:01:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:07,058 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-02 23:01:07,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2021-11-02 23:01:07,059 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-02 23:01:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 23:01:07,059 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:07,060 INFO L513 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:07,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:07,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 23:01:07,272 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:07,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:07,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1026176882, now seen corresponding path program 11 times [2021-11-02 23:01:07,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:07,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758811620] [2021-11-02 23:01:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:07,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:07,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:07,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758811620] [2021-11-02 23:01:07,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758811620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:07,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570282930] [2021-11-02 23:01:07,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:01:07,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:07,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:07,395 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:07,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 23:01:07,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-02 23:01:07,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:07,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:01:07,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:07,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570282930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:07,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:07,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-02 23:01:07,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807946104] [2021-11-02 23:01:07,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:01:07,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:07,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:01:07,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:01:07,613 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2021-11-02 23:01:07,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:07,723 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-11-02 23:01:07,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:01:07,723 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) Word has length 14 [2021-11-02 23:01:07,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:07,724 INFO L225 Difference]: With dead ends: 46 [2021-11-02 23:01:07,724 INFO L226 Difference]: Without dead ends: 42 [2021-11-02 23:01:07,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:01:07,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-02 23:01:07,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 22. [2021-11-02 23:01:07,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:01:07,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-02 23:01:07,729 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2021-11-02 23:01:07,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:07,729 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-02 23:01:07,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2021-11-02 23:01:07,729 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-02 23:01:07,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 23:01:07,730 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:07,730 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:07,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:07,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 23:01:07,943 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:07,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:07,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1673869647, now seen corresponding path program 6 times [2021-11-02 23:01:07,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:07,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463232874] [2021-11-02 23:01:07,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:07,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:08,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:08,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463232874] [2021-11-02 23:01:08,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463232874] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:08,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071175645] [2021-11-02 23:01:08,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:01:08,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:08,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:08,055 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:08,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 23:01:08,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-02 23:01:08,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:08,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:01:08,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:08,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071175645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:08,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:08,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-02 23:01:08,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702903718] [2021-11-02 23:01:08,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:01:08,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:08,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:01:08,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:01:08,290 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2021-11-02 23:01:08,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:08,383 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2021-11-02 23:01:08,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:01:08,383 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) Word has length 14 [2021-11-02 23:01:08,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:08,384 INFO L225 Difference]: With dead ends: 54 [2021-11-02 23:01:08,384 INFO L226 Difference]: Without dead ends: 50 [2021-11-02 23:01:08,385 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:01:08,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-02 23:01:08,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 24. [2021-11-02 23:01:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 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) [2021-11-02 23:01:08,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-02 23:01:08,389 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 14 [2021-11-02 23:01:08,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:08,389 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-02 23:01:08,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2021-11-02 23:01:08,390 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-02 23:01:08,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 23:01:08,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:08,391 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:08,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:08,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:08,599 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:08,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:08,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1023496106, now seen corresponding path program 12 times [2021-11-02 23:01:08,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:08,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644663769] [2021-11-02 23:01:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:08,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:08,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:08,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644663769] [2021-11-02 23:01:08,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644663769] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:08,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852152967] [2021-11-02 23:01:08,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:01:08,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:08,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:08,724 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:08,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 23:01:08,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-02 23:01:08,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:08,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:01:08,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:08,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852152967] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:08,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:08,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-11-02 23:01:08,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068535225] [2021-11-02 23:01:08,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:01:08,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:08,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:01:08,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:01:08,986 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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) [2021-11-02 23:01:09,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:09,073 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-11-02 23:01:09,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:01:09,074 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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 15 [2021-11-02 23:01:09,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:09,074 INFO L225 Difference]: With dead ends: 32 [2021-11-02 23:01:09,074 INFO L226 Difference]: Without dead ends: 22 [2021-11-02 23:01:09,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:01:09,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-02 23:01:09,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-02 23:01:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:01:09,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-02 23:01:09,079 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2021-11-02 23:01:09,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:09,079 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-02 23:01:09,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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) [2021-11-02 23:01:09,079 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-02 23:01:09,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 23:01:09,080 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:09,080 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:09,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:09,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:09,295 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:09,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:09,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1962122057, now seen corresponding path program 13 times [2021-11-02 23:01:09,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:09,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991286245] [2021-11-02 23:01:09,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:09,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:09,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:09,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991286245] [2021-11-02 23:01:09,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991286245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:09,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263046480] [2021-11-02 23:01:09,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:01:09,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:09,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:09,416 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:09,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 23:01:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:09,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:01:09,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:09,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263046480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:09,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:09,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-02 23:01:09,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214241004] [2021-11-02 23:01:09,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:01:09,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:09,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:01:09,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:01:09,662 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:09,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:09,766 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-11-02 23:01:09,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:01:09,766 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-02 23:01:09,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:09,767 INFO L225 Difference]: With dead ends: 34 [2021-11-02 23:01:09,767 INFO L226 Difference]: Without dead ends: 30 [2021-11-02 23:01:09,768 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:01:09,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-02 23:01:09,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2021-11-02 23:01:09,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:09,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-02 23:01:09,772 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2021-11-02 23:01:09,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:09,773 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-02 23:01:09,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:09,773 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-02 23:01:09,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 23:01:09,774 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:09,774 INFO L513 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:09,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:09,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-02 23:01:09,987 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:09,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:09,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1748377654, now seen corresponding path program 14 times [2021-11-02 23:01:09,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:09,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140444890] [2021-11-02 23:01:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:09,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:10,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:10,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140444890] [2021-11-02 23:01:10,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140444890] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:10,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227375928] [2021-11-02 23:01:10,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:01:10,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:10,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:10,147 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:10,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 23:01:10,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:01:10,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:10,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:01:10,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:10,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227375928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:10,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:10,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-02 23:01:10,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558745015] [2021-11-02 23:01:10,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:01:10,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:10,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:01:10,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:01:10,410 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:10,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:10,521 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-11-02 23:01:10,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:01:10,523 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-02 23:01:10,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:10,524 INFO L225 Difference]: With dead ends: 41 [2021-11-02 23:01:10,524 INFO L226 Difference]: Without dead ends: 37 [2021-11-02 23:01:10,524 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:01:10,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-02 23:01:10,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 23. [2021-11-02 23:01:10,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-02 23:01:10,529 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2021-11-02 23:01:10,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:10,530 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-02 23:01:10,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:10,530 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-02 23:01:10,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 23:01:10,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:10,531 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:10,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:10,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:10,744 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:10,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:10,744 INFO L85 PathProgramCache]: Analyzing trace with hash -348686121, now seen corresponding path program 15 times [2021-11-02 23:01:10,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:10,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102466653] [2021-11-02 23:01:10,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:10,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:10,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:10,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102466653] [2021-11-02 23:01:10,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102466653] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:10,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071881037] [2021-11-02 23:01:10,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:01:10,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:10,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:10,860 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:10,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 23:01:11,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 23:01:11,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:11,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:01:11,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:11,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071881037] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:11,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:11,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-02 23:01:11,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151681503] [2021-11-02 23:01:11,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:01:11,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:11,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:01:11,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:01:11,133 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:11,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:11,242 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-11-02 23:01:11,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:01:11,242 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-02 23:01:11,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:11,243 INFO L225 Difference]: With dead ends: 47 [2021-11-02 23:01:11,243 INFO L226 Difference]: Without dead ends: 43 [2021-11-02 23:01:11,243 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:01:11,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-02 23:01:11,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 23. [2021-11-02 23:01:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-02 23:01:11,248 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2021-11-02 23:01:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:11,248 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-02 23:01:11,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-02 23:01:11,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 23:01:11,249 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:11,249 INFO L513 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:11,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:11,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:11,449 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:11,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:11,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1246234646, now seen corresponding path program 7 times [2021-11-02 23:01:11,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:11,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741241591] [2021-11-02 23:01:11,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:11,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:11,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:11,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741241591] [2021-11-02 23:01:11,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741241591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:11,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520736787] [2021-11-02 23:01:11,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:01:11,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:11,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:11,581 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:11,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 23:01:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:11,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:01:11,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:11,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520736787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:11,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:11,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-02 23:01:11,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755629315] [2021-11-02 23:01:11,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:01:11,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:11,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:01:11,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:01:11,837 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:11,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:11,932 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-11-02 23:01:11,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:01:11,933 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-02 23:01:11,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:11,933 INFO L225 Difference]: With dead ends: 55 [2021-11-02 23:01:11,934 INFO L226 Difference]: Without dead ends: 51 [2021-11-02 23:01:11,934 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:01:11,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-02 23:01:11,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 25. [2021-11-02 23:01:11,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-11-02 23:01:11,939 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 15 [2021-11-02 23:01:11,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:11,939 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-11-02 23:01:11,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:11,939 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-11-02 23:01:11,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:01:11,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:11,940 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:11,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:12,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 23:01:12,155 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:12,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:12,156 INFO L85 PathProgramCache]: Analyzing trace with hash -694576239, now seen corresponding path program 16 times [2021-11-02 23:01:12,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:12,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872277684] [2021-11-02 23:01:12,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:12,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:12,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:12,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872277684] [2021-11-02 23:01:12,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872277684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:12,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732088929] [2021-11-02 23:01:12,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:01:12,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:12,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:12,491 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:12,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 23:01:12,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:01:12,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:12,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:01:12,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:12,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732088929] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:12,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:12,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2021-11-02 23:01:12,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548937257] [2021-11-02 23:01:12,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:01:12,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:12,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:01:12,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:01:12,820 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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) [2021-11-02 23:01:12,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:12,982 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-11-02 23:01:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:01:12,983 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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 16 [2021-11-02 23:01:12,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:12,983 INFO L225 Difference]: With dead ends: 33 [2021-11-02 23:01:12,983 INFO L226 Difference]: Without dead ends: 29 [2021-11-02 23:01:12,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:01:12,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-02 23:01:12,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-11-02 23:01:12,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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) [2021-11-02 23:01:12,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-11-02 23:01:12,989 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2021-11-02 23:01:12,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:12,989 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-11-02 23:01:12,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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) [2021-11-02 23:01:12,989 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-11-02 23:01:12,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:01:12,990 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:12,990 INFO L513 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:13,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-02 23:01:13,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 23:01:13,190 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:13,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:13,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1633202190, now seen corresponding path program 17 times [2021-11-02 23:01:13,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:13,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553077818] [2021-11-02 23:01:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:13,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:13,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:13,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553077818] [2021-11-02 23:01:13,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553077818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:13,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433310730] [2021-11-02 23:01:13,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:01:13,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:13,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:13,325 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:13,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 23:01:13,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-02 23:01:13,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:13,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:01:13,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:13,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433310730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:13,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:13,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-02 23:01:13,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551195535] [2021-11-02 23:01:13,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:01:13,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:13,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:01:13,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:01:13,635 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2021-11-02 23:01:13,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:13,810 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-11-02 23:01:13,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:01:13,811 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) Word has length 16 [2021-11-02 23:01:13,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:13,811 INFO L225 Difference]: With dead ends: 46 [2021-11-02 23:01:13,812 INFO L226 Difference]: Without dead ends: 42 [2021-11-02 23:01:13,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:01:13,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-02 23:01:13,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 26. [2021-11-02 23:01:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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) [2021-11-02 23:01:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-11-02 23:01:13,817 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2021-11-02 23:01:13,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:13,817 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-11-02 23:01:13,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2021-11-02 23:01:13,818 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-11-02 23:01:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:01:13,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:13,818 INFO L513 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:13,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:14,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 23:01:14,019 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:14,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:14,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2077297521, now seen corresponding path program 18 times [2021-11-02 23:01:14,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:14,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400767232] [2021-11-02 23:01:14,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:14,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:14,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:14,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400767232] [2021-11-02 23:01:14,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400767232] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:14,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525677764] [2021-11-02 23:01:14,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:01:14,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:14,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:14,167 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:14,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 23:01:14,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-02 23:01:14,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:14,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:01:14,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:14,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525677764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:14,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:14,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-02 23:01:14,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933624029] [2021-11-02 23:01:14,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:01:14,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:14,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:01:14,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:01:14,486 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2021-11-02 23:01:14,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:14,664 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-11-02 23:01:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:01:14,665 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) Word has length 16 [2021-11-02 23:01:14,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:14,666 INFO L225 Difference]: With dead ends: 53 [2021-11-02 23:01:14,666 INFO L226 Difference]: Without dead ends: 49 [2021-11-02 23:01:14,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:01:14,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-02 23:01:14,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 26. [2021-11-02 23:01:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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) [2021-11-02 23:01:14,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-11-02 23:01:14,672 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2021-11-02 23:01:14,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:14,673 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-11-02 23:01:14,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2021-11-02 23:01:14,673 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-11-02 23:01:14,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:01:14,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:14,674 INFO L513 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:14,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:14,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:14,884 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:14,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:14,885 INFO L85 PathProgramCache]: Analyzing trace with hash -19766254, now seen corresponding path program 19 times [2021-11-02 23:01:14,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:14,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145826773] [2021-11-02 23:01:14,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:14,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:15,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:15,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145826773] [2021-11-02 23:01:15,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145826773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:15,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271051820] [2021-11-02 23:01:15,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:01:15,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:15,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:15,022 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:15,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 23:01:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:15,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:01:15,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:15,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271051820] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:15,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:15,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-02 23:01:15,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204702937] [2021-11-02 23:01:15,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:01:15,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:15,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:01:15,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:01:15,340 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2021-11-02 23:01:15,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:15,489 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-11-02 23:01:15,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:01:15,490 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) Word has length 16 [2021-11-02 23:01:15,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:15,491 INFO L225 Difference]: With dead ends: 59 [2021-11-02 23:01:15,491 INFO L226 Difference]: Without dead ends: 55 [2021-11-02 23:01:15,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:01:15,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-02 23:01:15,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 26. [2021-11-02 23:01:15,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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) [2021-11-02 23:01:15,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-11-02 23:01:15,504 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2021-11-02 23:01:15,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:15,505 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-11-02 23:01:15,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2021-11-02 23:01:15,506 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-11-02 23:01:15,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:01:15,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:15,506 INFO L513 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:15,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:15,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:15,731 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:15,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:15,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1575154513, now seen corresponding path program 8 times [2021-11-02 23:01:15,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:15,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110293456] [2021-11-02 23:01:15,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:15,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:15,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:15,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110293456] [2021-11-02 23:01:15,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110293456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:15,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677563302] [2021-11-02 23:01:15,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:01:15,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:15,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:15,890 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:15,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 23:01:16,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:01:16,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:16,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:01:16,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:16,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677563302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:16,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:16,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-02 23:01:16,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34444924] [2021-11-02 23:01:16,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:01:16,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:16,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:01:16,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:01:16,195 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2021-11-02 23:01:16,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:16,297 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2021-11-02 23:01:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:01:16,311 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) Word has length 16 [2021-11-02 23:01:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:16,312 INFO L225 Difference]: With dead ends: 67 [2021-11-02 23:01:16,312 INFO L226 Difference]: Without dead ends: 63 [2021-11-02 23:01:16,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:01:16,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-02 23:01:16,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 28. [2021-11-02 23:01:16,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-11-02 23:01:16,318 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2021-11-02 23:01:16,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:16,319 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-11-02 23:01:16,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2021-11-02 23:01:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-11-02 23:01:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 23:01:16,319 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:16,320 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:16,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:16,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 23:01:16,535 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:16,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:16,536 INFO L85 PathProgramCache]: Analyzing trace with hash -55361545, now seen corresponding path program 20 times [2021-11-02 23:01:16,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:16,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881385713] [2021-11-02 23:01:16,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:16,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:16,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:16,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881385713] [2021-11-02 23:01:16,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881385713] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:16,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536382297] [2021-11-02 23:01:16,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:01:16,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:16,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:16,658 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:16,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 23:01:16,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:01:16,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:16,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:01:16,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:17,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536382297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:17,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:17,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-11-02 23:01:17,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121536782] [2021-11-02 23:01:17,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:01:17,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:17,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:01:17,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:01:17,009 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 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) [2021-11-02 23:01:17,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:17,121 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-11-02 23:01:17,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:01:17,121 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 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 17 [2021-11-02 23:01:17,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:17,121 INFO L225 Difference]: With dead ends: 37 [2021-11-02 23:01:17,121 INFO L226 Difference]: Without dead ends: 26 [2021-11-02 23:01:17,122 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:01:17,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-02 23:01:17,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-02 23:01:17,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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) [2021-11-02 23:01:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-11-02 23:01:17,125 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-11-02 23:01:17,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:17,126 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-11-02 23:01:17,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 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) [2021-11-02 23:01:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-11-02 23:01:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 23:01:17,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:17,126 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:17,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-02 23:01:17,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:17,327 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:17,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:17,327 INFO L85 PathProgramCache]: Analyzing trace with hash 912005046, now seen corresponding path program 21 times [2021-11-02 23:01:17,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:17,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202678637] [2021-11-02 23:01:17,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:17,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:17,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:17,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202678637] [2021-11-02 23:01:17,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202678637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:17,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935117252] [2021-11-02 23:01:17,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:01:17,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:17,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:17,473 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:17,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 23:01:17,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 23:01:17,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:17,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:01:17,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:17,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935117252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:17,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:17,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-02 23:01:17,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540125431] [2021-11-02 23:01:17,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:01:17,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:17,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:01:17,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:01:17,857 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2021-11-02 23:01:18,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:18,003 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-02 23:01:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:01:18,004 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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 17 [2021-11-02 23:01:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:18,004 INFO L225 Difference]: With dead ends: 39 [2021-11-02 23:01:18,004 INFO L226 Difference]: Without dead ends: 35 [2021-11-02 23:01:18,005 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:01:18,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-02 23:01:18,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2021-11-02 23:01:18,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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) [2021-11-02 23:01:18,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-11-02 23:01:18,011 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 17 [2021-11-02 23:01:18,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:18,013 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-11-02 23:01:18,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2021-11-02 23:01:18,013 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-11-02 23:01:18,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 23:01:18,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:18,014 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:18,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:18,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:18,231 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:18,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:18,232 INFO L85 PathProgramCache]: Analyzing trace with hash -26620905, now seen corresponding path program 22 times [2021-11-02 23:01:18,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:18,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325284320] [2021-11-02 23:01:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:18,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:18,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:18,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325284320] [2021-11-02 23:01:18,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325284320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:18,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16745692] [2021-11-02 23:01:18,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:01:18,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:18,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:18,375 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:18,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 23:01:18,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:01:18,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:18,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:01:18,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:18,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16745692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:18,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:18,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-02 23:01:18,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974030714] [2021-11-02 23:01:18,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:01:18,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:18,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:01:18,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:01:18,697 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2021-11-02 23:01:18,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:18,835 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-11-02 23:01:18,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:01:18,836 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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 17 [2021-11-02 23:01:18,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:18,836 INFO L225 Difference]: With dead ends: 47 [2021-11-02 23:01:18,836 INFO L226 Difference]: Without dead ends: 43 [2021-11-02 23:01:18,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:01:18,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-02 23:01:18,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2021-11-02 23:01:18,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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) [2021-11-02 23:01:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-11-02 23:01:18,843 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 17 [2021-11-02 23:01:18,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:18,843 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-11-02 23:01:18,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2021-11-02 23:01:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-11-02 23:01:18,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 23:01:18,845 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:18,845 INFO L513 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:18,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-02 23:01:19,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:19,059 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:19,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:19,060 INFO L85 PathProgramCache]: Analyzing trace with hash -611088490, now seen corresponding path program 23 times [2021-11-02 23:01:19,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:19,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216404138] [2021-11-02 23:01:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:19,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:19,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:19,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216404138] [2021-11-02 23:01:19,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216404138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:19,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394582371] [2021-11-02 23:01:19,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:01:19,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:19,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:19,207 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:19,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 23:01:19,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-02 23:01:19,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:19,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:01:19,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:19,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394582371] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:19,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:19,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-02 23:01:19,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122024980] [2021-11-02 23:01:19,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:01:19,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:19,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:01:19,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:01:19,627 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2021-11-02 23:01:19,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:19,807 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2021-11-02 23:01:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:01:19,808 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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 17 [2021-11-02 23:01:19,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:19,809 INFO L225 Difference]: With dead ends: 54 [2021-11-02 23:01:19,809 INFO L226 Difference]: Without dead ends: 50 [2021-11-02 23:01:19,810 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:01:19,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-02 23:01:19,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 27. [2021-11-02 23:01:19,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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) [2021-11-02 23:01:19,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-11-02 23:01:19,820 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 17 [2021-11-02 23:01:19,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:19,820 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-11-02 23:01:19,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2021-11-02 23:01:19,820 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-11-02 23:01:19,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 23:01:19,821 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:19,821 INFO L513 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:19,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:20,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-02 23:01:20,026 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:20,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:20,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1586815031, now seen corresponding path program 24 times [2021-11-02 23:01:20,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:20,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931082440] [2021-11-02 23:01:20,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:20,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:20,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:20,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931082440] [2021-11-02 23:01:20,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931082440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:20,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488392233] [2021-11-02 23:01:20,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:01:20,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:20,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:20,178 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:20,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 23:01:20,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-02 23:01:20,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:20,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:01:20,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:20,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488392233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:20,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:20,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-02 23:01:20,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59835475] [2021-11-02 23:01:20,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:01:20,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:20,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:01:20,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:01:20,527 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2021-11-02 23:01:20,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:20,685 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-11-02 23:01:20,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:01:20,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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 17 [2021-11-02 23:01:20,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:20,686 INFO L225 Difference]: With dead ends: 60 [2021-11-02 23:01:20,686 INFO L226 Difference]: Without dead ends: 56 [2021-11-02 23:01:20,686 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:01:20,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-02 23:01:20,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 27. [2021-11-02 23:01:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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) [2021-11-02 23:01:20,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-11-02 23:01:20,690 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 17 [2021-11-02 23:01:20,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:20,690 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-11-02 23:01:20,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2021-11-02 23:01:20,690 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-11-02 23:01:20,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 23:01:20,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:20,691 INFO L513 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:20,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-02 23:01:20,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 23:01:20,895 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:20,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:20,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1113231498, now seen corresponding path program 9 times [2021-11-02 23:01:20,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:20,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799838366] [2021-11-02 23:01:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:20,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:21,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:21,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799838366] [2021-11-02 23:01:21,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799838366] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:21,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136117013] [2021-11-02 23:01:21,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:01:21,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:21,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:21,046 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:21,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 23:01:21,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-02 23:01:21,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:21,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:01:21,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:21,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136117013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:21,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:21,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-02 23:01:21,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385375068] [2021-11-02 23:01:21,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:01:21,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:21,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:01:21,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:01:21,507 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2021-11-02 23:01:21,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:21,641 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-11-02 23:01:21,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:01:21,647 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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 17 [2021-11-02 23:01:21,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:21,648 INFO L225 Difference]: With dead ends: 68 [2021-11-02 23:01:21,648 INFO L226 Difference]: Without dead ends: 64 [2021-11-02 23:01:21,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:01:21,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-02 23:01:21,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 29. [2021-11-02 23:01:21,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 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) [2021-11-02 23:01:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-11-02 23:01:21,655 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 17 [2021-11-02 23:01:21,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:21,656 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-11-02 23:01:21,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2021-11-02 23:01:21,656 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-11-02 23:01:21,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:01:21,656 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:21,657 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:21,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:21,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-02 23:01:21,862 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:21,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:21,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1790949262, now seen corresponding path program 25 times [2021-11-02 23:01:21,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:21,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49362281] [2021-11-02 23:01:21,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:21,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:22,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:22,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49362281] [2021-11-02 23:01:22,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49362281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:22,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203746599] [2021-11-02 23:01:22,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:01:22,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:22,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:22,303 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:22,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 23:01:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:22,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:01:22,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:22,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203746599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:22,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:22,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 20 [2021-11-02 23:01:22,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589051899] [2021-11-02 23:01:22,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:01:22,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:22,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:01:22,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:01:22,776 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) [2021-11-02 23:01:22,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:22,925 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2021-11-02 23:01:22,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:01:22,926 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) Word has length 18 [2021-11-02 23:01:22,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:22,926 INFO L225 Difference]: With dead ends: 38 [2021-11-02 23:01:22,927 INFO L226 Difference]: Without dead ends: 34 [2021-11-02 23:01:22,927 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:01:22,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-02 23:01:22,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-11-02 23:01:22,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-11-02 23:01:22,934 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 18 [2021-11-02 23:01:22,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:22,934 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-11-02 23:01:22,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) [2021-11-02 23:01:22,934 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-11-02 23:01:22,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:01:22,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:22,935 INFO L513 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:22,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-02 23:01:23,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:23,153 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:23,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:23,154 INFO L85 PathProgramCache]: Analyzing trace with hash -823582671, now seen corresponding path program 26 times [2021-11-02 23:01:23,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:23,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918278396] [2021-11-02 23:01:23,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:23,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:23,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:23,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918278396] [2021-11-02 23:01:23,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918278396] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:23,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904156491] [2021-11-02 23:01:23,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:01:23,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:23,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:23,320 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:23,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 23:01:23,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:01:23,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:23,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:01:23,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:23,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904156491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:23,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:23,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-02 23:01:23,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101349298] [2021-11-02 23:01:23,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:01:23,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:23,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:01:23,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:01:23,735 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:23,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:23,909 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-11-02 23:01:23,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:01:23,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-02 23:01:23,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:23,910 INFO L225 Difference]: With dead ends: 52 [2021-11-02 23:01:23,910 INFO L226 Difference]: Without dead ends: 48 [2021-11-02 23:01:23,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:01:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-02 23:01:23,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 30. [2021-11-02 23:01:23,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:23,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-11-02 23:01:23,916 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 18 [2021-11-02 23:01:23,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:23,916 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-11-02 23:01:23,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:23,916 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-11-02 23:01:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:01:23,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:23,917 INFO L513 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:23,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:24,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-02 23:01:24,117 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:24,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:24,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1762208622, now seen corresponding path program 27 times [2021-11-02 23:01:24,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:24,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357698312] [2021-11-02 23:01:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:24,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:24,284 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:24,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:24,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357698312] [2021-11-02 23:01:24,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357698312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:24,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215253766] [2021-11-02 23:01:24,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:01:24,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:24,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:24,291 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:24,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 23:01:24,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 23:01:24,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:24,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:01:24,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:24,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215253766] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:24,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:24,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-02 23:01:24,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644043432] [2021-11-02 23:01:24,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:01:24,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:24,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:01:24,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:01:24,804 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:25,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:25,020 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-11-02 23:01:25,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 23:01:25,022 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-02 23:01:25,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:25,023 INFO L225 Difference]: With dead ends: 60 [2021-11-02 23:01:25,023 INFO L226 Difference]: Without dead ends: 56 [2021-11-02 23:01:25,024 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:01:25,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-02 23:01:25,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2021-11-02 23:01:25,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:25,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-11-02 23:01:25,032 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 18 [2021-11-02 23:01:25,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:25,033 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-11-02 23:01:25,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:25,033 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-11-02 23:01:25,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:01:25,033 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:25,034 INFO L513 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:25,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:25,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 23:01:25,255 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:25,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:25,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1948291089, now seen corresponding path program 28 times [2021-11-02 23:01:25,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:25,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809843662] [2021-11-02 23:01:25,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:25,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:25,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:25,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809843662] [2021-11-02 23:01:25,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809843662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:25,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323117957] [2021-11-02 23:01:25,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:01:25,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:25,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:25,427 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:25,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-02 23:01:25,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:01:25,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:25,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:01:25,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:25,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323117957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:25,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:25,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-02 23:01:25,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013878169] [2021-11-02 23:01:25,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:01:25,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:25,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:01:25,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:01:25,825 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:26,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:26,022 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2021-11-02 23:01:26,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 23:01:26,023 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-02 23:01:26,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:26,024 INFO L225 Difference]: With dead ends: 67 [2021-11-02 23:01:26,024 INFO L226 Difference]: Without dead ends: 63 [2021-11-02 23:01:26,024 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:01:26,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-02 23:01:26,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 30. [2021-11-02 23:01:26,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:26,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-11-02 23:01:26,033 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 18 [2021-11-02 23:01:26,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:26,033 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-11-02 23:01:26,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:26,034 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-11-02 23:01:26,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:01:26,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:26,034 INFO L513 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:26,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-02 23:01:26,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 23:01:26,239 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:26,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:26,240 INFO L85 PathProgramCache]: Analyzing trace with hash -148772686, now seen corresponding path program 29 times [2021-11-02 23:01:26,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:26,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023082219] [2021-11-02 23:01:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:26,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:26,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:26,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023082219] [2021-11-02 23:01:26,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023082219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:26,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116844086] [2021-11-02 23:01:26,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:01:26,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:26,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:26,383 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:26,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-02 23:01:26,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 23:01:26,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:26,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:01:26,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:26,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116844086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:26,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:26,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-02 23:01:26,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440865819] [2021-11-02 23:01:26,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:01:26,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:26,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:01:26,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:01:26,815 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:26,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:26,977 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2021-11-02 23:01:26,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:01:26,978 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-02 23:01:26,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:26,979 INFO L225 Difference]: With dead ends: 73 [2021-11-02 23:01:26,979 INFO L226 Difference]: Without dead ends: 69 [2021-11-02 23:01:26,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:01:26,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-02 23:01:26,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 30. [2021-11-02 23:01:26,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:26,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-11-02 23:01:26,988 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 18 [2021-11-02 23:01:26,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:26,988 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-11-02 23:01:26,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:26,989 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-11-02 23:01:26,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:01:26,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:26,989 INFO L513 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:27,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:27,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 23:01:27,203 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:27,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:27,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1446148081, now seen corresponding path program 10 times [2021-11-02 23:01:27,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:27,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703707725] [2021-11-02 23:01:27,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:27,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:27,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:27,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703707725] [2021-11-02 23:01:27,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703707725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:27,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699745150] [2021-11-02 23:01:27,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:01:27,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:27,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:27,367 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:27,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-02 23:01:27,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:01:27,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:27,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:01:27,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:27,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699745150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:27,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:27,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-02 23:01:27,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646588393] [2021-11-02 23:01:27,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:01:27,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:27,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:01:27,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:01:27,873 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:28,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:28,015 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-11-02 23:01:28,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:01:28,016 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-02 23:01:28,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:28,016 INFO L225 Difference]: With dead ends: 81 [2021-11-02 23:01:28,016 INFO L226 Difference]: Without dead ends: 77 [2021-11-02 23:01:28,017 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:01:28,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-02 23:01:28,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 32. [2021-11-02 23:01:28,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 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) [2021-11-02 23:01:28,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-11-02 23:01:28,024 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 18 [2021-11-02 23:01:28,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:28,025 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-11-02 23:01:28,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:28,025 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-11-02 23:01:28,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 23:01:28,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:28,026 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:28,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:28,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:28,239 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:28,239 INFO L85 PathProgramCache]: Analyzing trace with hash 316813110, now seen corresponding path program 30 times [2021-11-02 23:01:28,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:28,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329881800] [2021-11-02 23:01:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:28,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:28,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:28,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329881800] [2021-11-02 23:01:28,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329881800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:28,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800888700] [2021-11-02 23:01:28,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:01:28,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:28,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:28,414 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:28,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-02 23:01:28,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-02 23:01:28,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:28,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 23:01:28,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:28,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800888700] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:28,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:28,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-11-02 23:01:28,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061821374] [2021-11-02 23:01:28,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:01:28,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:28,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:01:28,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:01:28,848 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 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) [2021-11-02 23:01:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:28,980 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-11-02 23:01:28,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:01:28,981 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 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) Word has length 19 [2021-11-02 23:01:28,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:28,981 INFO L225 Difference]: With dead ends: 42 [2021-11-02 23:01:28,981 INFO L226 Difference]: Without dead ends: 30 [2021-11-02 23:01:28,982 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:01:28,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-02 23:01:28,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-02 23:01:28,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:28,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-11-02 23:01:28,989 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 19 [2021-11-02 23:01:28,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:28,989 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-11-02 23:01:28,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 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) [2021-11-02 23:01:28,989 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-11-02 23:01:28,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 23:01:28,990 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:28,990 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:29,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-02 23:01:29,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-02 23:01:29,203 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:29,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:29,204 INFO L85 PathProgramCache]: Analyzing trace with hash 240406359, now seen corresponding path program 31 times [2021-11-02 23:01:29,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:29,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153833311] [2021-11-02 23:01:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:29,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:29,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:29,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153833311] [2021-11-02 23:01:29,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153833311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:29,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989755526] [2021-11-02 23:01:29,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:01:29,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:29,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:29,380 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:29,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-02 23:01:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:29,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 23:01:29,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:29,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989755526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:29,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:29,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-02 23:01:29,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027394909] [2021-11-02 23:01:29,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:01:29,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:29,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:01:29,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:01:29,829 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2021-11-02 23:01:29,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:29,982 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-11-02 23:01:29,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:01:29,991 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) Word has length 19 [2021-11-02 23:01:29,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:29,992 INFO L225 Difference]: With dead ends: 44 [2021-11-02 23:01:29,992 INFO L226 Difference]: Without dead ends: 40 [2021-11-02 23:01:29,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:01:29,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-02 23:01:30,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2021-11-02 23:01:30,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 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) [2021-11-02 23:01:30,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-11-02 23:01:30,002 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 19 [2021-11-02 23:01:30,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:30,003 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-11-02 23:01:30,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2021-11-02 23:01:30,003 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-11-02 23:01:30,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 23:01:30,004 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:30,004 INFO L513 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:30,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:30,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-02 23:01:30,227 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:30,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:30,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1207772950, now seen corresponding path program 32 times [2021-11-02 23:01:30,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:30,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712033537] [2021-11-02 23:01:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:30,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:30,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:30,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712033537] [2021-11-02 23:01:30,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712033537] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:30,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543060318] [2021-11-02 23:01:30,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:01:30,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:30,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:30,407 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:30,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-02 23:01:30,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:01:30,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:30,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 23:01:30,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:30,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543060318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:30,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:30,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-02 23:01:30,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535133262] [2021-11-02 23:01:30,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:01:30,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:30,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:01:30,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:01:30,879 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2021-11-02 23:01:31,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:31,090 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-11-02 23:01:31,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 23:01:31,091 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) Word has length 19 [2021-11-02 23:01:31,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:31,093 INFO L225 Difference]: With dead ends: 53 [2021-11-02 23:01:31,093 INFO L226 Difference]: Without dead ends: 49 [2021-11-02 23:01:31,093 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:01:31,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-02 23:01:31,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2021-11-02 23:01:31,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 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) [2021-11-02 23:01:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-11-02 23:01:31,102 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 19 [2021-11-02 23:01:31,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:31,102 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-11-02 23:01:31,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2021-11-02 23:01:31,103 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-11-02 23:01:31,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 23:01:31,103 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:31,103 INFO L513 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:31,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-02 23:01:31,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:31,323 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:31,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:31,324 INFO L85 PathProgramCache]: Analyzing trace with hash 269146999, now seen corresponding path program 33 times [2021-11-02 23:01:31,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:31,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772565756] [2021-11-02 23:01:31,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:31,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:31,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:31,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772565756] [2021-11-02 23:01:31,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772565756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:31,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536696617] [2021-11-02 23:01:31,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:01:31,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:31,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:31,506 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:31,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-02 23:01:31,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 23:01:31,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:31,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 23:01:31,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:32,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536696617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:32,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:32,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-02 23:01:32,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244735022] [2021-11-02 23:01:32,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:01:32,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:32,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:01:32,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:01:32,052 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2021-11-02 23:01:32,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:32,251 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-11-02 23:01:32,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:01:32,252 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) Word has length 19 [2021-11-02 23:01:32,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:32,252 INFO L225 Difference]: With dead ends: 61 [2021-11-02 23:01:32,253 INFO L226 Difference]: Without dead ends: 57 [2021-11-02 23:01:32,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:01:32,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-02 23:01:32,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 31. [2021-11-02 23:01:32,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 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) [2021-11-02 23:01:32,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-11-02 23:01:32,262 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 19 [2021-11-02 23:01:32,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:32,263 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-11-02 23:01:32,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2021-11-02 23:01:32,263 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-11-02 23:01:32,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 23:01:32,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:32,263 INFO L513 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:32,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:32,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:32,464 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:32,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:32,464 INFO L85 PathProgramCache]: Analyzing trace with hash -315320586, now seen corresponding path program 34 times [2021-11-02 23:01:32,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:32,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009231246] [2021-11-02 23:01:32,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:32,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:32,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:32,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009231246] [2021-11-02 23:01:32,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009231246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:32,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232115236] [2021-11-02 23:01:32,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:01:32,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:32,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:32,665 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:32,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-02 23:01:33,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:01:33,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:33,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 23:01:33,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:33,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232115236] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:33,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:33,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-02 23:01:33,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423702257] [2021-11-02 23:01:33,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:01:33,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:33,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:01:33,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:01:33,234 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2021-11-02 23:01:33,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:33,477 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-11-02 23:01:33,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:01:33,478 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) Word has length 19 [2021-11-02 23:01:33,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:33,478 INFO L225 Difference]: With dead ends: 68 [2021-11-02 23:01:33,479 INFO L226 Difference]: Without dead ends: 64 [2021-11-02 23:01:33,479 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:01:33,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-02 23:01:33,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 31. [2021-11-02 23:01:33,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 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) [2021-11-02 23:01:33,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-11-02 23:01:33,496 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 19 [2021-11-02 23:01:33,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:33,496 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-11-02 23:01:33,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2021-11-02 23:01:33,497 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-11-02 23:01:33,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 23:01:33,497 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:33,497 INFO L513 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:33,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:33,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-02 23:01:33,707 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:33,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:33,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1882582935, now seen corresponding path program 35 times [2021-11-02 23:01:33,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:33,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43433225] [2021-11-02 23:01:33,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:33,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:33,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:33,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43433225] [2021-11-02 23:01:33,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43433225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:33,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788326322] [2021-11-02 23:01:33,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:01:33,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:33,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:33,885 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:33,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-02 23:01:34,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 23:01:34,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:34,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 23:01:34,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:34,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788326322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:34,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:34,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-02 23:01:34,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557642882] [2021-11-02 23:01:34,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:01:34,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:34,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:01:34,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:01:34,720 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2021-11-02 23:01:34,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:34,917 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-11-02 23:01:34,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:01:34,917 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) Word has length 19 [2021-11-02 23:01:34,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:34,917 INFO L225 Difference]: With dead ends: 74 [2021-11-02 23:01:34,918 INFO L226 Difference]: Without dead ends: 70 [2021-11-02 23:01:34,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:01:34,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-02 23:01:34,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 31. [2021-11-02 23:01:34,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 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) [2021-11-02 23:01:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-11-02 23:01:34,928 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 19 [2021-11-02 23:01:34,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:34,928 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-11-02 23:01:34,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2021-11-02 23:01:34,928 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-11-02 23:01:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 23:01:34,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:34,929 INFO L513 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:34,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:35,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-02 23:01:35,135 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:35,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:35,136 INFO L85 PathProgramCache]: Analyzing trace with hash -817463594, now seen corresponding path program 11 times [2021-11-02 23:01:35,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:35,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797490344] [2021-11-02 23:01:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:35,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:35,317 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:35,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:35,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797490344] [2021-11-02 23:01:35,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797490344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:35,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016980744] [2021-11-02 23:01:35,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:01:35,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:35,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:35,319 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:35,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-02 23:01:35,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-02 23:01:35,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:35,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 23:01:35,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:35,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016980744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:35,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:35,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-02 23:01:35,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606028913] [2021-11-02 23:01:35,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:01:35,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:35,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:01:35,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:01:35,915 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2021-11-02 23:01:36,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:36,070 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2021-11-02 23:01:36,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:01:36,070 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) Word has length 19 [2021-11-02 23:01:36,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:36,071 INFO L225 Difference]: With dead ends: 82 [2021-11-02 23:01:36,071 INFO L226 Difference]: Without dead ends: 78 [2021-11-02 23:01:36,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:01:36,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-02 23:01:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 33. [2021-11-02 23:01:36,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 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) [2021-11-02 23:01:36,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-11-02 23:01:36,083 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 19 [2021-11-02 23:01:36,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:36,083 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-11-02 23:01:36,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2021-11-02 23:01:36,084 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-11-02 23:01:36,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:01:36,084 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:36,084 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:36,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:36,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-02 23:01:36,299 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:36,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:36,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1135672079, now seen corresponding path program 36 times [2021-11-02 23:01:36,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:36,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579701230] [2021-11-02 23:01:36,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:36,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:36,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:36,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579701230] [2021-11-02 23:01:36,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579701230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:36,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804282524] [2021-11-02 23:01:36,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:01:36,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:36,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:36,787 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:36,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-02 23:01:37,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-02 23:01:37,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:37,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:01:37,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:37,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804282524] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:37,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:37,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 23 [2021-11-02 23:01:37,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290357932] [2021-11-02 23:01:37,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:01:37,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:37,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:01:37,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:01:37,416 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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) [2021-11-02 23:01:37,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:37,654 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-11-02 23:01:37,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:01:37,655 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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 20 [2021-11-02 23:01:37,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:37,656 INFO L225 Difference]: With dead ends: 43 [2021-11-02 23:01:37,656 INFO L226 Difference]: Without dead ends: 39 [2021-11-02 23:01:37,656 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:01:37,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-02 23:01:37,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-11-02 23:01:37,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2021-11-02 23:01:37,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-11-02 23:01:37,669 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 20 [2021-11-02 23:01:37,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:37,669 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-11-02 23:01:37,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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) [2021-11-02 23:01:37,669 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-11-02 23:01:37,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:01:37,670 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:37,670 INFO L513 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:37,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:37,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-02 23:01:37,883 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:37,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:37,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1212078830, now seen corresponding path program 37 times [2021-11-02 23:01:37,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:37,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006595417] [2021-11-02 23:01:37,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:37,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:38,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:38,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006595417] [2021-11-02 23:01:38,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006595417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:38,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066595657] [2021-11-02 23:01:38,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:01:38,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:38,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:38,068 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:38,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-02 23:01:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:38,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:01:38,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:38,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066595657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:38,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:38,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 23:01:38,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942316986] [2021-11-02 23:01:38,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:01:38,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:38,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:01:38,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:01:38,582 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:38,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:38,842 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2021-11-02 23:01:38,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:01:38,843 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-02 23:01:38,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:38,843 INFO L225 Difference]: With dead ends: 58 [2021-11-02 23:01:38,843 INFO L226 Difference]: Without dead ends: 54 [2021-11-02 23:01:38,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:01:38,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-02 23:01:38,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 34. [2021-11-02 23:01:38,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2021-11-02 23:01:38,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-11-02 23:01:38,853 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 20 [2021-11-02 23:01:38,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:38,853 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-11-02 23:01:38,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:38,853 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-11-02 23:01:38,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:01:38,853 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:38,854 INFO L513 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:38,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-11-02 23:01:39,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:39,067 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:39,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:39,068 INFO L85 PathProgramCache]: Analyzing trace with hash -244712239, now seen corresponding path program 38 times [2021-11-02 23:01:39,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:39,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882981191] [2021-11-02 23:01:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:39,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:39,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:39,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882981191] [2021-11-02 23:01:39,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882981191] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:39,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673331529] [2021-11-02 23:01:39,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:01:39,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:39,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:39,240 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:39,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-02 23:01:39,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:01:39,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:39,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:01:39,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:39,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673331529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:39,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:39,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 23:01:39,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841379876] [2021-11-02 23:01:39,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:01:39,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:39,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:01:39,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:01:39,766 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:40,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:40,080 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2021-11-02 23:01:40,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:01:40,080 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-02 23:01:40,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:40,081 INFO L225 Difference]: With dead ends: 67 [2021-11-02 23:01:40,081 INFO L226 Difference]: Without dead ends: 63 [2021-11-02 23:01:40,081 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:01:40,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-02 23:01:40,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2021-11-02 23:01:40,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2021-11-02 23:01:40,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-11-02 23:01:40,093 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 20 [2021-11-02 23:01:40,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:40,093 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-11-02 23:01:40,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:40,093 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-11-02 23:01:40,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:01:40,094 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:40,094 INFO L513 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:40,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:40,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:40,309 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:40,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1183338190, now seen corresponding path program 39 times [2021-11-02 23:01:40,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:40,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127675868] [2021-11-02 23:01:40,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:40,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:40,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:40,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127675868] [2021-11-02 23:01:40,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127675868] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:40,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614434034] [2021-11-02 23:01:40,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:01:40,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:40,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:40,543 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:40,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-02 23:01:41,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-02 23:01:41,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:41,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:01:41,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:41,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614434034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:41,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:41,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 23:01:41,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492230186] [2021-11-02 23:01:41,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:01:41,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:41,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:01:41,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:01:41,226 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:41,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:41,479 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2021-11-02 23:01:41,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:01:41,479 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-02 23:01:41,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:41,480 INFO L225 Difference]: With dead ends: 75 [2021-11-02 23:01:41,480 INFO L226 Difference]: Without dead ends: 71 [2021-11-02 23:01:41,480 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:01:41,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-02 23:01:41,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 34. [2021-11-02 23:01:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2021-11-02 23:01:41,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-11-02 23:01:41,489 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 20 [2021-11-02 23:01:41,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:41,490 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-11-02 23:01:41,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:41,490 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-11-02 23:01:41,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:01:41,490 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:41,490 INFO L513 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:41,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:41,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:41,691 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:41,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:41,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1767805775, now seen corresponding path program 40 times [2021-11-02 23:01:41,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:41,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133650582] [2021-11-02 23:01:41,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:41,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:41,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:41,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133650582] [2021-11-02 23:01:41,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133650582] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:41,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009651102] [2021-11-02 23:01:41,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:01:41,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:41,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:41,881 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:41,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-02 23:01:42,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:01:42,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:42,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:01:42,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:42,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009651102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:42,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:42,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 23:01:42,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999455572] [2021-11-02 23:01:42,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:01:42,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:42,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:01:42,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:01:42,405 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:42,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:42,664 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2021-11-02 23:01:42,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 23:01:42,664 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-02 23:01:42,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:42,665 INFO L225 Difference]: With dead ends: 82 [2021-11-02 23:01:42,665 INFO L226 Difference]: Without dead ends: 78 [2021-11-02 23:01:42,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:01:42,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-02 23:01:42,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 34. [2021-11-02 23:01:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2021-11-02 23:01:42,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-11-02 23:01:42,683 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 20 [2021-11-02 23:01:42,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:42,683 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-11-02 23:01:42,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:42,684 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-11-02 23:01:42,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:01:42,684 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:42,684 INFO L513 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:42,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-11-02 23:01:42,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:42,887 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:42,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:42,888 INFO L85 PathProgramCache]: Analyzing trace with hash 430097746, now seen corresponding path program 41 times [2021-11-02 23:01:42,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:42,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649719146] [2021-11-02 23:01:42,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:42,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:43,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:43,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649719146] [2021-11-02 23:01:43,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649719146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:43,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923628896] [2021-11-02 23:01:43,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:01:43,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:43,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:43,077 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:43,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-02 23:01:43,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-02 23:01:43,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:43,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:01:43,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:43,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923628896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:43,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:43,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 23:01:43,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230069774] [2021-11-02 23:01:43,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:01:43,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:43,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:01:43,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:01:43,720 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:43,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:43,955 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2021-11-02 23:01:43,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 23:01:43,956 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-02 23:01:43,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:43,956 INFO L225 Difference]: With dead ends: 88 [2021-11-02 23:01:43,956 INFO L226 Difference]: Without dead ends: 84 [2021-11-02 23:01:43,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:01:43,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-02 23:01:43,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 34. [2021-11-02 23:01:43,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2021-11-02 23:01:43,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-11-02 23:01:43,971 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 20 [2021-11-02 23:01:43,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:43,972 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-11-02 23:01:43,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:43,972 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-11-02 23:01:43,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:01:43,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:43,972 INFO L513 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:43,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:44,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:44,178 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:44,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:44,179 INFO L85 PathProgramCache]: Analyzing trace with hash 2025018513, now seen corresponding path program 12 times [2021-11-02 23:01:44,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:44,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768840050] [2021-11-02 23:01:44,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:44,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:44,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:44,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768840050] [2021-11-02 23:01:44,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768840050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:44,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823147225] [2021-11-02 23:01:44,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:01:44,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:44,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:44,379 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:44,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-02 23:01:44,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 23:01:44,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:44,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:01:44,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:45,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823147225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:45,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:45,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 23:01:45,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375218649] [2021-11-02 23:01:45,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:01:45,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:45,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:01:45,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:01:45,072 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:45,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:45,272 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2021-11-02 23:01:45,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:01:45,273 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-02 23:01:45,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:45,273 INFO L225 Difference]: With dead ends: 96 [2021-11-02 23:01:45,273 INFO L226 Difference]: Without dead ends: 92 [2021-11-02 23:01:45,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:01:45,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-02 23:01:45,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 36. [2021-11-02 23:01:45,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:45,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2021-11-02 23:01:45,283 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 20 [2021-11-02 23:01:45,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:45,283 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2021-11-02 23:01:45,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:45,283 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2021-11-02 23:01:45,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 23:01:45,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:45,283 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:45,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:45,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-02 23:01:45,484 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:45,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:45,484 INFO L85 PathProgramCache]: Analyzing trace with hash -844430697, now seen corresponding path program 42 times [2021-11-02 23:01:45,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:45,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142179173] [2021-11-02 23:01:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:45,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:45,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:45,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142179173] [2021-11-02 23:01:45,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142179173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:45,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516315003] [2021-11-02 23:01:45,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:01:45,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:45,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:45,658 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:45,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-02 23:01:46,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-02 23:01:46,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:46,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:01:46,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:46,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516315003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:46,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:46,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 17 [2021-11-02 23:01:46,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379882281] [2021-11-02 23:01:46,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:01:46,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:46,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:01:46,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:01:46,269 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 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) [2021-11-02 23:01:46,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:46,470 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-11-02 23:01:46,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:01:46,470 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 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 [2021-11-02 23:01:46,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:46,471 INFO L225 Difference]: With dead ends: 47 [2021-11-02 23:01:46,471 INFO L226 Difference]: Without dead ends: 34 [2021-11-02 23:01:46,471 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:01:46,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-02 23:01:46,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-02 23:01:46,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2021-11-02 23:01:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-11-02 23:01:46,497 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2021-11-02 23:01:46,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:46,497 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-11-02 23:01:46,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 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) [2021-11-02 23:01:46,497 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-11-02 23:01:46,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 23:01:46,497 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:46,497 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:46,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:46,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-02 23:01:46,698 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:46,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:46,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1081927318, now seen corresponding path program 43 times [2021-11-02 23:01:46,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:46,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530416701] [2021-11-02 23:01:46,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:46,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:46,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:46,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530416701] [2021-11-02 23:01:46,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530416701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:46,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954395073] [2021-11-02 23:01:46,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:01:46,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:46,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:46,907 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:46,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-02 23:01:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:47,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:01:47,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:47,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954395073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:47,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:47,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 23:01:47,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560564770] [2021-11-02 23:01:47,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:01:47,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:47,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:01:47,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:01:47,526 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2021-11-02 23:01:47,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:47,727 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-11-02 23:01:47,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 23:01:47,727 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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 [2021-11-02 23:01:47,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:47,727 INFO L225 Difference]: With dead ends: 49 [2021-11-02 23:01:47,727 INFO L226 Difference]: Without dead ends: 45 [2021-11-02 23:01:47,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:01:47,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-02 23:01:47,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2021-11-02 23:01:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 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) [2021-11-02 23:01:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-11-02 23:01:47,738 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 21 [2021-11-02 23:01:47,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:47,739 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-11-02 23:01:47,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2021-11-02 23:01:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-11-02 23:01:47,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 23:01:47,739 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:47,739 INFO L513 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:47,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-11-02 23:01:47,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:47,940 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:47,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:47,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1005520567, now seen corresponding path program 44 times [2021-11-02 23:01:47,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:47,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773659462] [2021-11-02 23:01:47,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:47,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:48,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:48,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773659462] [2021-11-02 23:01:48,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773659462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:48,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385490591] [2021-11-02 23:01:48,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:01:48,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:48,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:48,171 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:48,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-02 23:01:48,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:01:48,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:48,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:01:48,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:48,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385490591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:48,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:48,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 23:01:48,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818236089] [2021-11-02 23:01:48,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:01:48,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:48,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:01:48,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:01:48,791 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2021-11-02 23:01:49,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:49,108 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2021-11-02 23:01:49,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:01:49,108 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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 [2021-11-02 23:01:49,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:49,108 INFO L225 Difference]: With dead ends: 59 [2021-11-02 23:01:49,108 INFO L226 Difference]: Without dead ends: 55 [2021-11-02 23:01:49,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:01:49,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-02 23:01:49,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2021-11-02 23:01:49,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 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) [2021-11-02 23:01:49,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-11-02 23:01:49,119 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 21 [2021-11-02 23:01:49,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:49,119 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-11-02 23:01:49,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2021-11-02 23:01:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-11-02 23:01:49,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 23:01:49,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:49,120 INFO L513 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:49,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:49,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:49,321 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:49,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:49,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1972887158, now seen corresponding path program 45 times [2021-11-02 23:01:49,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:49,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960624882] [2021-11-02 23:01:49,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:49,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:49,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:49,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960624882] [2021-11-02 23:01:49,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960624882] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:49,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339531216] [2021-11-02 23:01:49,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:01:49,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:49,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:49,573 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:49,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-02 23:01:50,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-02 23:01:50,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:50,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:01:50,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:50,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339531216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:50,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:50,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 23:01:50,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26203975] [2021-11-02 23:01:50,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:01:50,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:50,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:01:50,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:01:50,465 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2021-11-02 23:01:50,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:50,834 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-11-02 23:01:50,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:01:50,834 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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 [2021-11-02 23:01:50,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:50,835 INFO L225 Difference]: With dead ends: 68 [2021-11-02 23:01:50,835 INFO L226 Difference]: Without dead ends: 64 [2021-11-02 23:01:50,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:01:50,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-02 23:01:50,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 35. [2021-11-02 23:01:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 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) [2021-11-02 23:01:50,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-11-02 23:01:50,846 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 21 [2021-11-02 23:01:50,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:50,846 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-11-02 23:01:50,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2021-11-02 23:01:50,846 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-11-02 23:01:50,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 23:01:50,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:50,847 INFO L513 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:50,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-11-02 23:01:51,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-02 23:01:51,052 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:51,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:51,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1034261207, now seen corresponding path program 46 times [2021-11-02 23:01:51,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:51,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626541391] [2021-11-02 23:01:51,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:51,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:51,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:51,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626541391] [2021-11-02 23:01:51,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626541391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:51,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39871458] [2021-11-02 23:01:51,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:01:51,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:51,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:51,239 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:51,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-02 23:01:51,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:01:51,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:51,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:01:51,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:51,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39871458] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:51,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:51,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 23:01:51,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209320736] [2021-11-02 23:01:51,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:01:51,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:51,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:01:51,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:01:51,851 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2021-11-02 23:01:52,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:52,137 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2021-11-02 23:01:52,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:01:52,138 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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 [2021-11-02 23:01:52,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:52,138 INFO L225 Difference]: With dead ends: 76 [2021-11-02 23:01:52,138 INFO L226 Difference]: Without dead ends: 72 [2021-11-02 23:01:52,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:01:52,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-02 23:01:52,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 35. [2021-11-02 23:01:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 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) [2021-11-02 23:01:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-11-02 23:01:52,150 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 21 [2021-11-02 23:01:52,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:52,150 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-11-02 23:01:52,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2021-11-02 23:01:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-11-02 23:01:52,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 23:01:52,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:52,151 INFO L513 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:52,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:52,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-02 23:01:52,352 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:52,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:52,352 INFO L85 PathProgramCache]: Analyzing trace with hash 449793622, now seen corresponding path program 47 times [2021-11-02 23:01:52,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:52,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444894776] [2021-11-02 23:01:52,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:52,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:52,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:52,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444894776] [2021-11-02 23:01:52,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444894776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:52,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438682529] [2021-11-02 23:01:52,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:01:52,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:52,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:52,599 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:52,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-02 23:01:53,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-02 23:01:53,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:53,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:01:53,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:53,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438682529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:53,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:53,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 23:01:53,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366101482] [2021-11-02 23:01:53,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:01:53,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:53,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:01:53,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:01:53,346 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2021-11-02 23:01:53,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:53,595 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2021-11-02 23:01:53,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:01:53,596 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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 [2021-11-02 23:01:53,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:53,596 INFO L225 Difference]: With dead ends: 83 [2021-11-02 23:01:53,596 INFO L226 Difference]: Without dead ends: 79 [2021-11-02 23:01:53,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:01:53,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-02 23:01:53,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 35. [2021-11-02 23:01:53,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 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) [2021-11-02 23:01:53,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-11-02 23:01:53,608 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 21 [2021-11-02 23:01:53,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:53,608 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-11-02 23:01:53,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2021-11-02 23:01:53,608 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-11-02 23:01:53,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 23:01:53,609 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:53,609 INFO L513 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:53,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:53,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:53,809 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:53,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:53,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1647270153, now seen corresponding path program 48 times [2021-11-02 23:01:53,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:53,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413335800] [2021-11-02 23:01:53,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:53,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:53,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:53,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413335800] [2021-11-02 23:01:53,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413335800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:53,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468163526] [2021-11-02 23:01:53,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:01:53,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:53,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:54,001 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:54,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-02 23:01:54,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 23:01:54,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:54,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:01:54,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:54,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468163526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:54,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:54,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 23:01:54,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490668915] [2021-11-02 23:01:54,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:01:54,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:54,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:01:54,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:01:54,814 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2021-11-02 23:01:55,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:55,029 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2021-11-02 23:01:55,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:01:55,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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 [2021-11-02 23:01:55,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:55,035 INFO L225 Difference]: With dead ends: 89 [2021-11-02 23:01:55,035 INFO L226 Difference]: Without dead ends: 85 [2021-11-02 23:01:55,036 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:01:55,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-02 23:01:55,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 35. [2021-11-02 23:01:55,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 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) [2021-11-02 23:01:55,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-11-02 23:01:55,047 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 21 [2021-11-02 23:01:55,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:55,047 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-11-02 23:01:55,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2021-11-02 23:01:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-11-02 23:01:55,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 23:01:55,048 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:55,048 INFO L513 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:55,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:55,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-11-02 23:01:55,251 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:55,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:55,252 INFO L85 PathProgramCache]: Analyzing trace with hash -52349386, now seen corresponding path program 13 times [2021-11-02 23:01:55,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:55,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794210977] [2021-11-02 23:01:55,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:55,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:55,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:55,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794210977] [2021-11-02 23:01:55,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794210977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:55,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343281654] [2021-11-02 23:01:55,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:01:55,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:55,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:55,479 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:55,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-02 23:01:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:56,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:01:56,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:56,136 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:56,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343281654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:56,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:56,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 23:01:56,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080181402] [2021-11-02 23:01:56,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:01:56,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:56,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:01:56,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:01:56,138 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2021-11-02 23:01:56,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:56,356 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2021-11-02 23:01:56,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 23:01:56,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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 [2021-11-02 23:01:56,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:56,361 INFO L225 Difference]: With dead ends: 97 [2021-11-02 23:01:56,361 INFO L226 Difference]: Without dead ends: 93 [2021-11-02 23:01:56,362 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:01:56,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-02 23:01:56,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 37. [2021-11-02 23:01:56,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 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) [2021-11-02 23:01:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-11-02 23:01:56,380 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 21 [2021-11-02 23:01:56,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:56,380 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-11-02 23:01:56,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2021-11-02 23:01:56,380 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-11-02 23:01:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 23:01:56,381 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:56,381 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:56,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-11-02 23:01:56,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:56,583 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:56,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:56,584 INFO L85 PathProgramCache]: Analyzing trace with hash -818326126, now seen corresponding path program 49 times [2021-11-02 23:01:56,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:56,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348113324] [2021-11-02 23:01:56,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:56,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:57,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:57,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348113324] [2021-11-02 23:01:57,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348113324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:57,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817628346] [2021-11-02 23:01:57,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:01:57,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:57,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:57,257 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:57,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-02 23:01:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:57,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:01:57,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:58,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817628346] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:58,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:58,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 26 [2021-11-02 23:01:58,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799392805] [2021-11-02 23:01:58,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:01:58,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:58,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:01:58,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:01:58,109 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 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) [2021-11-02 23:01:58,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:58,393 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2021-11-02 23:01:58,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:01:58,393 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 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 22 [2021-11-02 23:01:58,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:58,394 INFO L225 Difference]: With dead ends: 48 [2021-11-02 23:01:58,394 INFO L226 Difference]: Without dead ends: 44 [2021-11-02 23:01:58,394 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:01:58,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-02 23:01:58,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2021-11-02 23:01:58,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 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) [2021-11-02 23:01:58,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-02 23:01:58,414 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 22 [2021-11-02 23:01:58,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:58,415 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-02 23:01:58,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 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) [2021-11-02 23:01:58,415 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-02 23:01:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 23:01:58,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:58,416 INFO L513 BasicCegarLoop]: trace histogram [8, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:58,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-11-02 23:01:58,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:58,619 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:58,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:58,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1108031889, now seen corresponding path program 50 times [2021-11-02 23:01:58,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:58,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686282518] [2021-11-02 23:01:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:58,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:58,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:58,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686282518] [2021-11-02 23:01:58,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686282518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:58,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553573813] [2021-11-02 23:01:58,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:01:58,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:58,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:58,867 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:58,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-02 23:01:59,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:01:59,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:59,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:01:59,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:59,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553573813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:59,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:59,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 23:01:59,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843699804] [2021-11-02 23:01:59,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:01:59,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:59,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:01:59,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:01:59,618 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2021-11-02 23:01:59,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:59,940 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-11-02 23:01:59,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:01:59,940 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-02 23:01:59,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:59,941 INFO L225 Difference]: With dead ends: 64 [2021-11-02 23:01:59,941 INFO L226 Difference]: Without dead ends: 60 [2021-11-02 23:01:59,941 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:01:59,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-02 23:01:59,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 38. [2021-11-02 23:01:59,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 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) [2021-11-02 23:01:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-02 23:01:59,956 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 22 [2021-11-02 23:01:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:59,956 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-02 23:01:59,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2021-11-02 23:01:59,956 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-02 23:01:59,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 23:01:59,956 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:59,956 INFO L513 BasicCegarLoop]: trace histogram [9, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:59,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:00,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-02 23:02:00,157 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:00,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:00,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1031625138, now seen corresponding path program 51 times [2021-11-02 23:02:00,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:00,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020848580] [2021-11-02 23:02:00,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:00,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:00,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:00,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020848580] [2021-11-02 23:02:00,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020848580] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:00,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119725843] [2021-11-02 23:02:00,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:02:00,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:00,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:00,410 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:00,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-02 23:02:01,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-02 23:02:01,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:01,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:02:01,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:01,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119725843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:01,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:01,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 23:02:01,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398478825] [2021-11-02 23:02:01,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:02:01,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:01,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:02:01,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:02:01,481 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2021-11-02 23:02:01,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:01,901 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2021-11-02 23:02:01,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:02:01,901 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-02 23:02:01,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:01,901 INFO L225 Difference]: With dead ends: 74 [2021-11-02 23:02:01,902 INFO L226 Difference]: Without dead ends: 70 [2021-11-02 23:02:01,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:02:01,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-02 23:02:01,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2021-11-02 23:02:01,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 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) [2021-11-02 23:02:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-02 23:02:01,921 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 22 [2021-11-02 23:02:01,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:01,921 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-02 23:02:01,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2021-11-02 23:02:01,921 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-02 23:02:01,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 23:02:01,922 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:01,922 INFO L513 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:01,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-11-02 23:02:02,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:02,122 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:02,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:02,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1998991729, now seen corresponding path program 52 times [2021-11-02 23:02:02,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:02,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299269787] [2021-11-02 23:02:02,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:02,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:02,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:02,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299269787] [2021-11-02 23:02:02,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299269787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:02,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653899844] [2021-11-02 23:02:02,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:02:02,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:02,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:02,334 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:02,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-02 23:02:02,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:02:02,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:02,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:02:02,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:03,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653899844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:03,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:03,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 23:02:03,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523124064] [2021-11-02 23:02:03,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:02:03,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:03,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:02:03,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:02:03,038 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2021-11-02 23:02:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:03,446 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-11-02 23:02:03,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:02:03,446 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-02 23:02:03,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:03,447 INFO L225 Difference]: With dead ends: 83 [2021-11-02 23:02:03,447 INFO L226 Difference]: Without dead ends: 79 [2021-11-02 23:02:03,447 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:02:03,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-02 23:02:03,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 38. [2021-11-02 23:02:03,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 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) [2021-11-02 23:02:03,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-02 23:02:03,464 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 22 [2021-11-02 23:02:03,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:03,465 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-02 23:02:03,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2021-11-02 23:02:03,465 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-02 23:02:03,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 23:02:03,465 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:03,465 INFO L513 BasicCegarLoop]: trace histogram [11, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:03,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:03,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-02 23:02:03,667 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:03,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:03,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1060365778, now seen corresponding path program 53 times [2021-11-02 23:02:03,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:03,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268367318] [2021-11-02 23:02:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:03,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:03,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:03,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268367318] [2021-11-02 23:02:03,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268367318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:03,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315927825] [2021-11-02 23:02:03,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:02:03,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:03,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:03,861 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:03,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-02 23:02:04,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-02 23:02:04,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:04,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:02:04,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:04,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315927825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:04,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:04,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 23:02:04,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546827400] [2021-11-02 23:02:04,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:02:04,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:04,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:02:04,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:02:04,779 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2021-11-02 23:02:05,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:05,125 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2021-11-02 23:02:05,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:02:05,126 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-02 23:02:05,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:05,127 INFO L225 Difference]: With dead ends: 91 [2021-11-02 23:02:05,127 INFO L226 Difference]: Without dead ends: 87 [2021-11-02 23:02:05,127 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:02:05,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-02 23:02:05,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 38. [2021-11-02 23:02:05,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 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) [2021-11-02 23:02:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-02 23:02:05,143 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 22 [2021-11-02 23:02:05,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:05,144 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-02 23:02:05,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2021-11-02 23:02:05,144 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-02 23:02:05,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 23:02:05,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:05,144 INFO L513 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:05,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:05,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-02 23:02:05,345 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:05,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:05,345 INFO L85 PathProgramCache]: Analyzing trace with hash 475898193, now seen corresponding path program 54 times [2021-11-02 23:02:05,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:05,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652331657] [2021-11-02 23:02:05,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:05,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:05,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:05,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652331657] [2021-11-02 23:02:05,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652331657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:05,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37372345] [2021-11-02 23:02:05,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:02:05,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:05,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:05,566 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:05,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-02 23:02:06,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 23:02:06,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:06,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:02:06,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:06,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37372345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:06,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:06,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 23:02:06,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813649733] [2021-11-02 23:02:06,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:02:06,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:06,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:02:06,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:02:06,366 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2021-11-02 23:02:06,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:06,665 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2021-11-02 23:02:06,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:02:06,665 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-02 23:02:06,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:06,666 INFO L225 Difference]: With dead ends: 98 [2021-11-02 23:02:06,666 INFO L226 Difference]: Without dead ends: 94 [2021-11-02 23:02:06,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:02:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-02 23:02:06,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 38. [2021-11-02 23:02:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 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) [2021-11-02 23:02:06,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-02 23:02:06,688 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 22 [2021-11-02 23:02:06,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:06,688 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-02 23:02:06,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2021-11-02 23:02:06,688 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-02 23:02:06,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 23:02:06,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:06,688 INFO L513 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:06,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:06,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-02 23:02:06,891 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:06,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:06,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1621165582, now seen corresponding path program 55 times [2021-11-02 23:02:06,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:06,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347006277] [2021-11-02 23:02:06,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:06,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:07,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:07,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347006277] [2021-11-02 23:02:07,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347006277] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:07,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055432795] [2021-11-02 23:02:07,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:02:07,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:07,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:07,123 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:07,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-02 23:02:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:07,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:02:07,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:07,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055432795] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:07,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:07,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 23:02:07,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998404521] [2021-11-02 23:02:07,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:02:07,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:07,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:02:07,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:02:07,928 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2021-11-02 23:02:08,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:08,182 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2021-11-02 23:02:08,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 23:02:08,182 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-02 23:02:08,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:08,183 INFO L225 Difference]: With dead ends: 104 [2021-11-02 23:02:08,183 INFO L226 Difference]: Without dead ends: 100 [2021-11-02 23:02:08,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:02:08,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-02 23:02:08,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 38. [2021-11-02 23:02:08,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 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) [2021-11-02 23:02:08,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-02 23:02:08,208 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 22 [2021-11-02 23:02:08,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:08,209 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-02 23:02:08,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2021-11-02 23:02:08,209 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-02 23:02:08,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 23:02:08,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:08,209 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:08,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-11-02 23:02:08,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-02 23:02:08,410 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:08,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:08,410 INFO L85 PathProgramCache]: Analyzing trace with hash -26244815, now seen corresponding path program 14 times [2021-11-02 23:02:08,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:08,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701311] [2021-11-02 23:02:08,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:08,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:08,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:08,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701311] [2021-11-02 23:02:08,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:08,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766102436] [2021-11-02 23:02:08,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:02:08,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:08,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:08,681 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:08,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-02 23:02:09,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:02:09,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:09,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:02:09,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:09,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766102436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:09,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:09,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 23:02:09,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904723163] [2021-11-02 23:02:09,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:02:09,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:09,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:02:09,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:02:09,475 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2021-11-02 23:02:09,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:09,731 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2021-11-02 23:02:09,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:02:09,731 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-02 23:02:09,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:09,732 INFO L225 Difference]: With dead ends: 112 [2021-11-02 23:02:09,732 INFO L226 Difference]: Without dead ends: 108 [2021-11-02 23:02:09,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:02:09,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-02 23:02:09,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 40. [2021-11-02 23:02:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 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) [2021-11-02 23:02:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-11-02 23:02:09,750 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 22 [2021-11-02 23:02:09,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:09,751 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-11-02 23:02:09,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2021-11-02 23:02:09,751 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-11-02 23:02:09,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 23:02:09,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:09,751 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:09,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-11-02 23:02:09,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-11-02 23:02:09,952 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:09,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:09,952 INFO L85 PathProgramCache]: Analyzing trace with hash 403359254, now seen corresponding path program 56 times [2021-11-02 23:02:09,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:09,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179412433] [2021-11-02 23:02:09,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:09,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:09,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:10,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:10,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179412433] [2021-11-02 23:02:10,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179412433] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:10,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515246357] [2021-11-02 23:02:10,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:02:10,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:10,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:10,167 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:10,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-02 23:02:10,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:02:10,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:10,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 23:02:10,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:10,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515246357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:10,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:10,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 19 [2021-11-02 23:02:10,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227381282] [2021-11-02 23:02:10,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:02:10,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:10,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:02:10,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:02:10,970 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2021-11-02 23:02:11,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:11,219 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-11-02 23:02:11,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:02:11,220 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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 [2021-11-02 23:02:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:11,220 INFO L225 Difference]: With dead ends: 52 [2021-11-02 23:02:11,220 INFO L226 Difference]: Without dead ends: 38 [2021-11-02 23:02:11,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:02:11,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-02 23:02:11,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-02 23:02:11,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 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) [2021-11-02 23:02:11,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-02 23:02:11,235 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 23 [2021-11-02 23:02:11,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:11,236 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-02 23:02:11,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2021-11-02 23:02:11,236 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-02 23:02:11,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 23:02:11,236 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:11,237 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:11,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-11-02 23:02:11,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:11,439 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:11,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:11,440 INFO L85 PathProgramCache]: Analyzing trace with hash -9084425, now seen corresponding path program 57 times [2021-11-02 23:02:11,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:11,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52402327] [2021-11-02 23:02:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:11,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:11,691 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:11,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:11,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52402327] [2021-11-02 23:02:11,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52402327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:11,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767214803] [2021-11-02 23:02:11,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:02:11,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:11,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:11,695 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:11,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-02 23:02:12,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 23:02:12,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:12,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 23:02:12,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:12,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767214803] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:12,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:12,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:02:12,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398113699] [2021-11-02 23:02:12,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:02:12,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:12,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:02:12,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:02:12,553 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2021-11-02 23:02:12,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:12,803 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-11-02 23:02:12,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 23:02:12,804 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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 [2021-11-02 23:02:12,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:12,804 INFO L225 Difference]: With dead ends: 54 [2021-11-02 23:02:12,804 INFO L226 Difference]: Without dead ends: 50 [2021-11-02 23:02:12,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:02:12,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-02 23:02:12,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2021-11-02 23:02:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 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) [2021-11-02 23:02:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-11-02 23:02:12,829 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 23 [2021-11-02 23:02:12,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:12,830 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-11-02 23:02:12,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2021-11-02 23:02:12,830 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-11-02 23:02:12,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 23:02:12,830 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:12,830 INFO L513 BasicCegarLoop]: trace histogram [9, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:12,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:13,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:13,035 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:13,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:13,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1917273590, now seen corresponding path program 58 times [2021-11-02 23:02:13,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:13,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106916712] [2021-11-02 23:02:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:13,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:13,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:13,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106916712] [2021-11-02 23:02:13,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106916712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:13,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748487539] [2021-11-02 23:02:13,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:02:13,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:13,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:13,299 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:13,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-02 23:02:14,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:02:14,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:14,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 23:02:14,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:14,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748487539] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:14,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:14,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:02:14,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529483701] [2021-11-02 23:02:14,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:02:14,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:14,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:02:14,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:02:14,328 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2021-11-02 23:02:14,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:14,696 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2021-11-02 23:02:14,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 23:02:14,697 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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 [2021-11-02 23:02:14,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:14,697 INFO L225 Difference]: With dead ends: 65 [2021-11-02 23:02:14,698 INFO L226 Difference]: Without dead ends: 61 [2021-11-02 23:02:14,698 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:02:14,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-02 23:02:14,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2021-11-02 23:02:14,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 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) [2021-11-02 23:02:14,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-11-02 23:02:14,718 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 23 [2021-11-02 23:02:14,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:14,719 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-11-02 23:02:14,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2021-11-02 23:02:14,719 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-11-02 23:02:14,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 23:02:14,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:14,719 INFO L513 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:14,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:14,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:14,920 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:14,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:14,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1840866839, now seen corresponding path program 59 times [2021-11-02 23:02:14,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:14,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499374520] [2021-11-02 23:02:14,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:14,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:15,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:15,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499374520] [2021-11-02 23:02:15,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499374520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:15,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739639690] [2021-11-02 23:02:15,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:02:15,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:15,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:15,154 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:15,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-02 23:02:15,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 23:02:15,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:15,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 23:02:15,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:16,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739639690] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:16,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:16,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:02:16,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461184047] [2021-11-02 23:02:16,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:02:16,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:16,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:02:16,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:02:16,069 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2021-11-02 23:02:16,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:16,456 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2021-11-02 23:02:16,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:02:16,457 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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 [2021-11-02 23:02:16,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:16,457 INFO L225 Difference]: With dead ends: 75 [2021-11-02 23:02:16,457 INFO L226 Difference]: Without dead ends: 71 [2021-11-02 23:02:16,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 23:02:16,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-02 23:02:16,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 39. [2021-11-02 23:02:16,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 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) [2021-11-02 23:02:16,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-11-02 23:02:16,480 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 23 [2021-11-02 23:02:16,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:16,481 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-11-02 23:02:16,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2021-11-02 23:02:16,481 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-11-02 23:02:16,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 23:02:16,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:16,481 INFO L513 BasicCegarLoop]: trace histogram [11, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:16,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-11-02 23:02:16,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:16,682 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:16,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:16,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1486733866, now seen corresponding path program 60 times [2021-11-02 23:02:16,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:16,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360780196] [2021-11-02 23:02:16,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:16,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:16,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:16,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360780196] [2021-11-02 23:02:16,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360780196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:16,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730324581] [2021-11-02 23:02:16,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:02:16,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:16,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:16,901 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:16,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-02 23:02:17,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 23:02:17,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:17,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 23:02:17,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:17,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730324581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:17,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:17,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:02:17,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637323225] [2021-11-02 23:02:17,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:02:17,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:17,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:02:17,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:02:17,809 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2021-11-02 23:02:18,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:18,268 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2021-11-02 23:02:18,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:02:18,268 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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 [2021-11-02 23:02:18,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:18,269 INFO L225 Difference]: With dead ends: 84 [2021-11-02 23:02:18,269 INFO L226 Difference]: Without dead ends: 80 [2021-11-02 23:02:18,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:02:18,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-02 23:02:18,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 39. [2021-11-02 23:02:18,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 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) [2021-11-02 23:02:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-11-02 23:02:18,289 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 23 [2021-11-02 23:02:18,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:18,289 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-11-02 23:02:18,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2021-11-02 23:02:18,290 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-11-02 23:02:18,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 23:02:18,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:18,290 INFO L513 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:18,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-11-02 23:02:18,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:18,490 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:18,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:18,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1869607479, now seen corresponding path program 61 times [2021-11-02 23:02:18,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:18,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889066294] [2021-11-02 23:02:18,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:18,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:18,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:18,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889066294] [2021-11-02 23:02:18,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889066294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:18,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191962505] [2021-11-02 23:02:18,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:02:18,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:18,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:18,751 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:18,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-02 23:02:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:19,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 23:02:19,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:19,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191962505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:19,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:19,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:02:19,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158433666] [2021-11-02 23:02:19,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:02:19,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:19,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:02:19,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:02:19,773 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2021-11-02 23:02:20,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:20,140 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2021-11-02 23:02:20,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 23:02:20,141 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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 [2021-11-02 23:02:20,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:20,141 INFO L225 Difference]: With dead ends: 92 [2021-11-02 23:02:20,142 INFO L226 Difference]: Without dead ends: 88 [2021-11-02 23:02:20,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:02:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-02 23:02:20,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 39. [2021-11-02 23:02:20,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 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) [2021-11-02 23:02:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-11-02 23:02:20,162 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 23 [2021-11-02 23:02:20,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:20,162 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-11-02 23:02:20,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2021-11-02 23:02:20,163 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-11-02 23:02:20,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 23:02:20,163 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:20,163 INFO L513 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:20,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-11-02 23:02:20,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-11-02 23:02:20,364 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:20,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:20,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1285139894, now seen corresponding path program 62 times [2021-11-02 23:02:20,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:20,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267311061] [2021-11-02 23:02:20,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:20,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:20,607 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:20,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:20,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267311061] [2021-11-02 23:02:20,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267311061] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:20,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128332243] [2021-11-02 23:02:20,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:02:20,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:20,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:20,609 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:20,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-02 23:02:21,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:02:21,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:21,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 23:02:21,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:21,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128332243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:21,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:21,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:02:21,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257146923] [2021-11-02 23:02:21,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:02:21,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:21,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:02:21,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:02:21,453 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2021-11-02 23:02:21,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:21,791 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2021-11-02 23:02:21,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:02:21,793 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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 [2021-11-02 23:02:21,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:21,793 INFO L225 Difference]: With dead ends: 99 [2021-11-02 23:02:21,793 INFO L226 Difference]: Without dead ends: 95 [2021-11-02 23:02:21,793 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:02:21,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-02 23:02:21,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 39. [2021-11-02 23:02:21,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 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) [2021-11-02 23:02:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-11-02 23:02:21,814 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 23 [2021-11-02 23:02:21,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:21,814 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-11-02 23:02:21,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2021-11-02 23:02:21,815 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-11-02 23:02:21,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 23:02:21,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:21,815 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:21,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:22,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-11-02 23:02:22,015 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:22,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:22,016 INFO L85 PathProgramCache]: Analyzing trace with hash -811923881, now seen corresponding path program 63 times [2021-11-02 23:02:22,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:22,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9961778] [2021-11-02 23:02:22,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:22,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:22,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:22,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9961778] [2021-11-02 23:02:22,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9961778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:22,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501277387] [2021-11-02 23:02:22,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:02:22,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:22,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:22,282 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:22,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-02 23:02:23,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-02 23:02:23,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:23,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 23:02:23,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:23,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501277387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:23,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:23,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:02:23,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129818216] [2021-11-02 23:02:23,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:02:23,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:23,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:02:23,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:02:23,313 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2021-11-02 23:02:23,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:23,625 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2021-11-02 23:02:23,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:02:23,626 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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 [2021-11-02 23:02:23,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:23,626 INFO L225 Difference]: With dead ends: 105 [2021-11-02 23:02:23,626 INFO L226 Difference]: Without dead ends: 101 [2021-11-02 23:02:23,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:02:23,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-02 23:02:23,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 39. [2021-11-02 23:02:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 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) [2021-11-02 23:02:23,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-11-02 23:02:23,655 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 23 [2021-11-02 23:02:23,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:23,655 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-11-02 23:02:23,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2021-11-02 23:02:23,655 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-11-02 23:02:23,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 23:02:23,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:23,656 INFO L513 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:23,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-11-02 23:02:23,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:23,856 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:23,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:23,856 INFO L85 PathProgramCache]: Analyzing trace with hash 782996886, now seen corresponding path program 15 times [2021-11-02 23:02:23,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:23,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061745010] [2021-11-02 23:02:23,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:23,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:24,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:24,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061745010] [2021-11-02 23:02:24,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061745010] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:24,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949524391] [2021-11-02 23:02:24,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:02:24,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:24,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:24,121 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:24,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-02 23:02:25,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-02 23:02:25,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:25,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 23:02:25,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:25,268 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:25,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949524391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:25,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:25,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:02:25,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188451010] [2021-11-02 23:02:25,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:02:25,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:25,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:02:25,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:02:25,270 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2021-11-02 23:02:25,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:25,538 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2021-11-02 23:02:25,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 23:02:25,539 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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 [2021-11-02 23:02:25,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:25,540 INFO L225 Difference]: With dead ends: 113 [2021-11-02 23:02:25,540 INFO L226 Difference]: Without dead ends: 109 [2021-11-02 23:02:25,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:02:25,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-02 23:02:25,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 41. [2021-11-02 23:02:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:25,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2021-11-02 23:02:25,562 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 23 [2021-11-02 23:02:25,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:25,562 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2021-11-02 23:02:25,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2021-11-02 23:02:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2021-11-02 23:02:25,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:02:25,562 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:25,562 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:25,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-11-02 23:02:25,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-02 23:02:25,763 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:25,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:25,763 INFO L85 PathProgramCache]: Analyzing trace with hash -279951791, now seen corresponding path program 64 times [2021-11-02 23:02:25,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:25,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569127575] [2021-11-02 23:02:25,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:25,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:26,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:26,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569127575] [2021-11-02 23:02:26,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569127575] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:26,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387369500] [2021-11-02 23:02:26,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:02:26,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:26,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:26,662 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:26,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-02 23:02:27,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:02:27,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:27,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:02:27,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:27,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387369500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:27,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:27,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 29 [2021-11-02 23:02:27,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074555554] [2021-11-02 23:02:27,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:02:27,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:27,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:02:27,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:02:27,998 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 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) [2021-11-02 23:02:28,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:28,366 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-11-02 23:02:28,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:02:28,367 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 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) Word has length 24 [2021-11-02 23:02:28,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:28,367 INFO L225 Difference]: With dead ends: 53 [2021-11-02 23:02:28,367 INFO L226 Difference]: Without dead ends: 49 [2021-11-02 23:02:28,367 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:02:28,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-02 23:02:28,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2021-11-02 23:02:28,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 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) [2021-11-02 23:02:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-02 23:02:28,398 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 24 [2021-11-02 23:02:28,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:28,399 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-02 23:02:28,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 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) [2021-11-02 23:02:28,399 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-02 23:02:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:02:28,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:28,400 INFO L513 BasicCegarLoop]: trace histogram [9, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:28,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-11-02 23:02:28,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:28,600 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:28,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:28,601 INFO L85 PathProgramCache]: Analyzing trace with hash -692395470, now seen corresponding path program 65 times [2021-11-02 23:02:28,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:28,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580976001] [2021-11-02 23:02:28,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:28,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:28,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:28,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580976001] [2021-11-02 23:02:28,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580976001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:28,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541257322] [2021-11-02 23:02:28,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:02:28,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:28,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:28,925 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:28,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-02 23:02:30,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 23:02:30,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:30,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:02:30,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:30,379 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:30,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541257322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:30,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:30,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:02:30,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674741286] [2021-11-02 23:02:30,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:02:30,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:30,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:02:30,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:02:30,381 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:02:30,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:30,891 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-11-02 23:02:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:02:30,892 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 23:02:30,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:30,892 INFO L225 Difference]: With dead ends: 70 [2021-11-02 23:02:30,892 INFO L226 Difference]: Without dead ends: 66 [2021-11-02 23:02:30,893 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:02:30,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-02 23:02:30,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 42. [2021-11-02 23:02:30,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 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) [2021-11-02 23:02:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-02 23:02:30,929 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 24 [2021-11-02 23:02:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:30,929 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-02 23:02:30,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:02:30,930 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-02 23:02:30,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:02:30,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:30,930 INFO L513 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:30,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-11-02 23:02:31,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:31,139 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:31,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:31,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1233962545, now seen corresponding path program 66 times [2021-11-02 23:02:31,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:31,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600413441] [2021-11-02 23:02:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:31,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:31,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:31,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600413441] [2021-11-02 23:02:31,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600413441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:31,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524823764] [2021-11-02 23:02:31,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:02:31,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:31,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:31,459 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:31,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-02 23:02:32,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-02 23:02:32,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:32,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:02:32,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:32,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524823764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:32,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:32,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:02:32,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358192906] [2021-11-02 23:02:32,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:02:32,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:32,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:02:32,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:02:32,461 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:02:32,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:32,966 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2021-11-02 23:02:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:02:32,966 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 23:02:32,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:32,967 INFO L225 Difference]: With dead ends: 81 [2021-11-02 23:02:32,967 INFO L226 Difference]: Without dead ends: 77 [2021-11-02 23:02:32,967 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=1346, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 23:02:32,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-02 23:02:32,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 42. [2021-11-02 23:02:32,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 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) [2021-11-02 23:02:32,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-02 23:02:32,999 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 24 [2021-11-02 23:02:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:32,999 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-02 23:02:32,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:02:32,999 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-02 23:02:32,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:02:32,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:33,000 INFO L513 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:33,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-11-02 23:02:33,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:33,212 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:33,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:33,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1157555794, now seen corresponding path program 67 times [2021-11-02 23:02:33,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:33,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417133395] [2021-11-02 23:02:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:33,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:33,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:33,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417133395] [2021-11-02 23:02:33,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417133395] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:33,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971151690] [2021-11-02 23:02:33,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:02:33,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:33,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:33,475 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:33,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-02 23:02:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:34,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:02:34,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:34,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971151690] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:34,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:34,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:02:34,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541830946] [2021-11-02 23:02:34,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:02:34,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:34,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:02:34,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:02:34,397 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:02:34,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:34,993 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2021-11-02 23:02:34,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:02:34,993 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 23:02:34,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:34,994 INFO L225 Difference]: With dead ends: 91 [2021-11-02 23:02:34,994 INFO L226 Difference]: Without dead ends: 87 [2021-11-02 23:02:34,994 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 23:02:34,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-02 23:02:35,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 42. [2021-11-02 23:02:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 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) [2021-11-02 23:02:35,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-02 23:02:35,022 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 24 [2021-11-02 23:02:35,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:35,022 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-02 23:02:35,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:02:35,022 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-02 23:02:35,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:02:35,022 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:35,022 INFO L513 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:35,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-11-02 23:02:35,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-11-02 23:02:35,227 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:35,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:35,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2124922385, now seen corresponding path program 68 times [2021-11-02 23:02:35,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:35,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15815727] [2021-11-02 23:02:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:35,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:35,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:35,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15815727] [2021-11-02 23:02:35,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15815727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:35,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272644837] [2021-11-02 23:02:35,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:02:35,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:35,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:35,463 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:35,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-02 23:02:36,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:02:36,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:36,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:02:36,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:36,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272644837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:36,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:36,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:02:36,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499401574] [2021-11-02 23:02:36,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:02:36,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:36,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:02:36,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:02:36,399 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:02:36,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:36,922 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2021-11-02 23:02:36,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:02:36,923 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 23:02:36,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:36,923 INFO L225 Difference]: With dead ends: 100 [2021-11-02 23:02:36,923 INFO L226 Difference]: Without dead ends: 96 [2021-11-02 23:02:36,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:02:36,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-02 23:02:36,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 42. [2021-11-02 23:02:36,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 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) [2021-11-02 23:02:36,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-02 23:02:36,952 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 24 [2021-11-02 23:02:36,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:36,952 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-02 23:02:36,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:02:36,953 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-02 23:02:36,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:02:36,953 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:36,953 INFO L513 BasicCegarLoop]: trace histogram [13, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:36,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-11-02 23:02:37,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-11-02 23:02:37,167 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:37,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:37,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1186296434, now seen corresponding path program 69 times [2021-11-02 23:02:37,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:37,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519608131] [2021-11-02 23:02:37,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:37,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:37,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:37,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519608131] [2021-11-02 23:02:37,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519608131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:37,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082915360] [2021-11-02 23:02:37,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:02:37,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:37,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:37,451 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:37,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-02 23:02:38,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-02 23:02:38,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:38,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:02:38,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:38,639 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:38,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082915360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:38,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:38,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:02:38,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178739901] [2021-11-02 23:02:38,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:02:38,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:38,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:02:38,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:02:38,641 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:02:39,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:39,089 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2021-11-02 23:02:39,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:02:39,090 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 23:02:39,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:39,091 INFO L225 Difference]: With dead ends: 108 [2021-11-02 23:02:39,091 INFO L226 Difference]: Without dead ends: 104 [2021-11-02 23:02:39,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:02:39,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-02 23:02:39,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 42. [2021-11-02 23:02:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 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) [2021-11-02 23:02:39,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-02 23:02:39,136 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 24 [2021-11-02 23:02:39,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:39,136 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-02 23:02:39,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:02:39,137 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-02 23:02:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:02:39,137 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:39,137 INFO L513 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:39,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:39,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:39,345 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:39,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:39,346 INFO L85 PathProgramCache]: Analyzing trace with hash 601828849, now seen corresponding path program 70 times [2021-11-02 23:02:39,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:39,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935847611] [2021-11-02 23:02:39,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:39,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:39,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:39,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935847611] [2021-11-02 23:02:39,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935847611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:39,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993387958] [2021-11-02 23:02:39,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:02:39,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:39,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:39,639 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:39,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-02 23:02:40,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:02:40,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:40,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:02:40,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:40,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993387958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:40,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:40,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:02:40,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640933422] [2021-11-02 23:02:40,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:02:40,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:40,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:02:40,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:02:40,841 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:02:41,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:41,245 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2021-11-02 23:02:41,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:02:41,246 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 23:02:41,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:41,247 INFO L225 Difference]: With dead ends: 115 [2021-11-02 23:02:41,247 INFO L226 Difference]: Without dead ends: 111 [2021-11-02 23:02:41,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:02:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-02 23:02:41,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 42. [2021-11-02 23:02:41,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 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) [2021-11-02 23:02:41,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-02 23:02:41,276 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 24 [2021-11-02 23:02:41,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:41,276 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-02 23:02:41,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:02:41,276 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-02 23:02:41,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:02:41,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:41,276 INFO L513 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:41,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:41,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-11-02 23:02:41,477 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:41,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:41,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1495234926, now seen corresponding path program 71 times [2021-11-02 23:02:41,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:41,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894930003] [2021-11-02 23:02:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:41,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:41,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:41,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894930003] [2021-11-02 23:02:41,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894930003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:41,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069290302] [2021-11-02 23:02:41,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:02:41,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:41,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:41,752 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:41,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-02 23:02:42,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-02 23:02:42,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:42,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:02:42,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:42,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069290302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:42,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:42,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:02:42,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576179812] [2021-11-02 23:02:42,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:02:42,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:42,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:02:42,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:02:42,903 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:02:43,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:43,323 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-11-02 23:02:43,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:02:43,324 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 23:02:43,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:43,325 INFO L225 Difference]: With dead ends: 121 [2021-11-02 23:02:43,325 INFO L226 Difference]: Without dead ends: 117 [2021-11-02 23:02:43,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:02:43,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-02 23:02:43,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 42. [2021-11-02 23:02:43,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 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) [2021-11-02 23:02:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-02 23:02:43,370 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 24 [2021-11-02 23:02:43,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:43,370 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-02 23:02:43,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:02:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-02 23:02:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:02:43,371 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:43,371 INFO L513 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:43,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:43,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:43,579 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:43,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:43,579 INFO L85 PathProgramCache]: Analyzing trace with hash 99685841, now seen corresponding path program 16 times [2021-11-02 23:02:43,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:43,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897287527] [2021-11-02 23:02:43,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:43,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:43,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:43,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897287527] [2021-11-02 23:02:43,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897287527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:43,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800634165] [2021-11-02 23:02:43,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:02:43,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:43,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:43,883 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:43,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-11-02 23:02:44,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:02:44,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:44,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:02:44,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:44,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800634165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:44,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:44,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:02:44,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587318669] [2021-11-02 23:02:45,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:02:45,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:45,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:02:45,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:02:45,000 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:02:45,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:45,476 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2021-11-02 23:02:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:02:45,476 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 23:02:45,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:45,477 INFO L225 Difference]: With dead ends: 129 [2021-11-02 23:02:45,478 INFO L226 Difference]: Without dead ends: 125 [2021-11-02 23:02:45,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:02:45,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-02 23:02:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 44. [2021-11-02 23:02:45,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 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) [2021-11-02 23:02:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2021-11-02 23:02:45,540 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 24 [2021-11-02 23:02:45,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:45,541 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2021-11-02 23:02:45,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2021-11-02 23:02:45,541 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2021-11-02 23:02:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 23:02:45,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:45,542 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:45,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:45,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:45,755 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:45,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:45,755 INFO L85 PathProgramCache]: Analyzing trace with hash -86905545, now seen corresponding path program 72 times [2021-11-02 23:02:45,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:45,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46558018] [2021-11-02 23:02:45,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:45,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:45,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:45,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46558018] [2021-11-02 23:02:45,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46558018] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:45,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933554265] [2021-11-02 23:02:45,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:02:45,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:45,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:45,979 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:45,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-02 23:02:46,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-02 23:02:46,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:46,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 23:02:46,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:47,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933554265] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:47,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:47,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 21 [2021-11-02 23:02:47,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335190452] [2021-11-02 23:02:47,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:02:47,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:47,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:02:47,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:02:47,025 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:47,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:47,312 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-11-02 23:02:47,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:02:47,312 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-02 23:02:47,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:47,313 INFO L225 Difference]: With dead ends: 57 [2021-11-02 23:02:47,313 INFO L226 Difference]: Without dead ends: 42 [2021-11-02 23:02:47,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:02:47,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-02 23:02:47,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-02 23:02:47,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 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) [2021-11-02 23:02:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-02 23:02:47,339 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 25 [2021-11-02 23:02:47,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:47,339 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-02 23:02:47,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-02 23:02:47,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 23:02:47,339 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:47,339 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:47,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:47,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:47,540 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:47,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:47,540 INFO L85 PathProgramCache]: Analyzing trace with hash 12242294, now seen corresponding path program 73 times [2021-11-02 23:02:47,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:47,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042820750] [2021-11-02 23:02:47,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:47,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:47,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:47,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042820750] [2021-11-02 23:02:47,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042820750] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:47,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221066641] [2021-11-02 23:02:47,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:02:47,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:47,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:47,794 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:47,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-11-02 23:02:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:48,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 23:02:48,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:48,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221066641] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:48,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:48,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:02:48,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112929174] [2021-11-02 23:02:48,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:02:48,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:48,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:02:48,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:02:48,806 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:49,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:49,117 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-11-02 23:02:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:02:49,118 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-02 23:02:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:49,118 INFO L225 Difference]: With dead ends: 59 [2021-11-02 23:02:49,118 INFO L226 Difference]: Without dead ends: 55 [2021-11-02 23:02:49,119 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:02:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-02 23:02:49,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-11-02 23:02:49,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:49,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-11-02 23:02:49,149 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 25 [2021-11-02 23:02:49,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:49,149 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-11-02 23:02:49,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:49,149 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-11-02 23:02:49,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 23:02:49,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:49,150 INFO L513 BasicCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:49,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:49,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:49,351 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:49,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:49,352 INFO L85 PathProgramCache]: Analyzing trace with hash -400201385, now seen corresponding path program 74 times [2021-11-02 23:02:49,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:49,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492422257] [2021-11-02 23:02:49,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:49,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:49,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:49,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492422257] [2021-11-02 23:02:49,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492422257] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:49,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177301098] [2021-11-02 23:02:49,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:02:49,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:49,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:49,632 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:49,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-11-02 23:02:50,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:02:50,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:50,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 23:02:50,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:50,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177301098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:50,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:50,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:02:50,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338441677] [2021-11-02 23:02:50,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:02:50,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:50,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:02:50,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:02:50,653 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:51,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:51,077 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2021-11-02 23:02:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:02:51,077 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-02 23:02:51,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:51,078 INFO L225 Difference]: With dead ends: 71 [2021-11-02 23:02:51,078 INFO L226 Difference]: Without dead ends: 67 [2021-11-02 23:02:51,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:02:51,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-02 23:02:51,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2021-11-02 23:02:51,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:51,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-11-02 23:02:51,110 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 25 [2021-11-02 23:02:51,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:51,110 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-11-02 23:02:51,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:51,110 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-11-02 23:02:51,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 23:02:51,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:51,111 INFO L513 BasicCegarLoop]: trace histogram [11, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:51,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-11-02 23:02:51,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:51,311 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:51,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:51,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1526156630, now seen corresponding path program 75 times [2021-11-02 23:02:51,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:51,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604435048] [2021-11-02 23:02:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:51,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:51,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:51,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604435048] [2021-11-02 23:02:51,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604435048] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:51,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104083295] [2021-11-02 23:02:51,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:02:51,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:51,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:51,627 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:51,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-02 23:02:52,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-02 23:02:52,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:52,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 23:02:52,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:53,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104083295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:53,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:53,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:02:53,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096460331] [2021-11-02 23:02:53,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:02:53,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:53,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:02:53,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:02:53,109 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:53,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:53,669 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2021-11-02 23:02:53,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:02:53,684 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-02 23:02:53,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:53,684 INFO L225 Difference]: With dead ends: 82 [2021-11-02 23:02:53,684 INFO L226 Difference]: Without dead ends: 78 [2021-11-02 23:02:53,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=1422, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:02:53,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-02 23:02:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 43. [2021-11-02 23:02:53,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-11-02 23:02:53,746 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 25 [2021-11-02 23:02:53,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:53,746 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-11-02 23:02:53,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:53,747 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-11-02 23:02:53,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 23:02:53,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:53,747 INFO L513 BasicCegarLoop]: trace histogram [12, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:53,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:53,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:53,956 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:53,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:53,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1449749879, now seen corresponding path program 76 times [2021-11-02 23:02:53,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:53,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098398674] [2021-11-02 23:02:53,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:53,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:54,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:54,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098398674] [2021-11-02 23:02:54,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098398674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:54,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252313052] [2021-11-02 23:02:54,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:02:54,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:54,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:54,206 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:54,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-11-02 23:02:55,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:02:55,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:55,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 23:02:55,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:55,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252313052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:55,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:55,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:02:55,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129854126] [2021-11-02 23:02:55,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:02:55,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:55,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:02:55,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:02:55,273 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:55,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:55,889 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2021-11-02 23:02:55,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 23:02:55,889 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-02 23:02:55,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:55,890 INFO L225 Difference]: With dead ends: 92 [2021-11-02 23:02:55,890 INFO L226 Difference]: Without dead ends: 88 [2021-11-02 23:02:55,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:02:55,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-02 23:02:55,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 43. [2021-11-02 23:02:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-11-02 23:02:55,939 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 25 [2021-11-02 23:02:55,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:55,939 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-11-02 23:02:55,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:55,939 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-11-02 23:02:55,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 23:02:55,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:55,940 INFO L513 BasicCegarLoop]: trace histogram [13, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:55,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-11-02 23:02:56,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:56,155 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:56,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:56,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1877850826, now seen corresponding path program 77 times [2021-11-02 23:02:56,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:56,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564900611] [2021-11-02 23:02:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:56,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:56,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:56,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564900611] [2021-11-02 23:02:56,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564900611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:56,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394063950] [2021-11-02 23:02:56,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:02:56,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:56,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:56,455 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:56,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-02 23:02:57,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-02 23:02:57,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:57,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 23:02:57,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:57,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394063950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:57,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:57,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:02:57,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031617722] [2021-11-02 23:02:57,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:02:57,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:57,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:02:57,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:02:57,676 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:58,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:58,252 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2021-11-02 23:02:58,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:02:58,252 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-02 23:02:58,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:58,253 INFO L225 Difference]: With dead ends: 101 [2021-11-02 23:02:58,253 INFO L226 Difference]: Without dead ends: 97 [2021-11-02 23:02:58,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:02:58,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-02 23:02:58,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 43. [2021-11-02 23:02:58,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-11-02 23:02:58,290 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 25 [2021-11-02 23:02:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:58,290 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-11-02 23:02:58,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:58,290 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-11-02 23:02:58,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 23:02:58,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:58,291 INFO L513 BasicCegarLoop]: trace histogram [14, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:58,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-11-02 23:02:58,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:58,491 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:58,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:58,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1478490519, now seen corresponding path program 78 times [2021-11-02 23:02:58,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:58,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744292024] [2021-11-02 23:02:58,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:58,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:58,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:58,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744292024] [2021-11-02 23:02:58,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744292024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:58,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270284664] [2021-11-02 23:02:58,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:02:58,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:58,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:58,782 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:58,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-02 23:03:00,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-02 23:03:00,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:00,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 23:03:00,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:00,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270284664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:00,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:00,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:03:00,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455327654] [2021-11-02 23:03:00,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:03:00,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:00,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:03:00,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:03:00,295 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:00,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:00,756 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-11-02 23:03:00,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:03:00,758 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-02 23:03:00,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:00,759 INFO L225 Difference]: With dead ends: 109 [2021-11-02 23:03:00,759 INFO L226 Difference]: Without dead ends: 105 [2021-11-02 23:03:00,760 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:03:00,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-02 23:03:00,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 43. [2021-11-02 23:03:00,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:00,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-11-02 23:03:00,809 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 25 [2021-11-02 23:03:00,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:00,810 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-11-02 23:03:00,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:00,810 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-11-02 23:03:00,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 23:03:00,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:00,810 INFO L513 BasicCegarLoop]: trace histogram [15, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:00,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:01,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:01,011 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:01,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:01,011 INFO L85 PathProgramCache]: Analyzing trace with hash 894022934, now seen corresponding path program 79 times [2021-11-02 23:03:01,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:01,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221497588] [2021-11-02 23:03:01,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:01,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:01,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:01,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221497588] [2021-11-02 23:03:01,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221497588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:01,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171058724] [2021-11-02 23:03:01,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:03:01,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:01,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:01,265 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:01,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-11-02 23:03:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:02,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 23:03:02,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:02,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171058724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:02,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:02,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:03:02,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790275787] [2021-11-02 23:03:02,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:03:02,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:02,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:03:02,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:03:02,381 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:02,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:02,963 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2021-11-02 23:03:02,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:03:02,963 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-02 23:03:02,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:02,964 INFO L225 Difference]: With dead ends: 116 [2021-11-02 23:03:02,964 INFO L226 Difference]: Without dead ends: 112 [2021-11-02 23:03:02,965 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:03:02,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-02 23:03:03,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 43. [2021-11-02 23:03:03,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:03,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-11-02 23:03:03,005 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 25 [2021-11-02 23:03:03,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:03,006 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-11-02 23:03:03,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:03,006 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-11-02 23:03:03,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 23:03:03,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:03,007 INFO L513 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:03,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:03,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:03,223 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:03,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:03,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1203040841, now seen corresponding path program 80 times [2021-11-02 23:03:03,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:03,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417372787] [2021-11-02 23:03:03,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:03,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:03,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:03,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417372787] [2021-11-02 23:03:03,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417372787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:03,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790557483] [2021-11-02 23:03:03,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:03:03,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:03,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:03,477 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:03,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-11-02 23:03:04,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:03:04,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:04,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 23:03:04,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:04,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790557483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:04,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:04,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:03:04,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179413099] [2021-11-02 23:03:04,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:03:04,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:04,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:03:04,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:03:04,605 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:05,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:05,000 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2021-11-02 23:03:05,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:03:05,000 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-02 23:03:05,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:05,001 INFO L225 Difference]: With dead ends: 122 [2021-11-02 23:03:05,001 INFO L226 Difference]: Without dead ends: 118 [2021-11-02 23:03:05,001 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:03:05,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-02 23:03:05,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 43. [2021-11-02 23:03:05,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:05,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-11-02 23:03:05,035 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 25 [2021-11-02 23:03:05,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:05,035 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-11-02 23:03:05,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-11-02 23:03:05,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 23:03:05,036 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:05,036 INFO L513 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:05,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:05,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:05,236 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:05,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:05,237 INFO L85 PathProgramCache]: Analyzing trace with hash 391879926, now seen corresponding path program 17 times [2021-11-02 23:03:05,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:05,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408935818] [2021-11-02 23:03:05,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:05,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:05,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:05,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408935818] [2021-11-02 23:03:05,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408935818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:05,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607981330] [2021-11-02 23:03:05,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:03:05,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:05,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:05,537 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:05,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-11-02 23:03:07,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-02 23:03:07,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:07,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 23:03:07,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:07,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607981330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:07,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:07,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:03:07,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450088997] [2021-11-02 23:03:07,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:03:07,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:07,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:03:07,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:03:07,320 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:07,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:07,730 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2021-11-02 23:03:07,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:03:07,730 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-02 23:03:07,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:07,731 INFO L225 Difference]: With dead ends: 130 [2021-11-02 23:03:07,731 INFO L226 Difference]: Without dead ends: 126 [2021-11-02 23:03:07,731 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:03:07,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-02 23:03:07,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 45. [2021-11-02 23:03:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.25) internal successors, (55), 44 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) [2021-11-02 23:03:07,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2021-11-02 23:03:07,795 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 25 [2021-11-02 23:03:07,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:07,795 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2021-11-02 23:03:07,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2021-11-02 23:03:07,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:03:07,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:07,796 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:07,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-11-02 23:03:07,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:07,997 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:07,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:07,997 INFO L85 PathProgramCache]: Analyzing trace with hash 381176498, now seen corresponding path program 81 times [2021-11-02 23:03:07,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:07,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924186868] [2021-11-02 23:03:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:07,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:08,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:08,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924186868] [2021-11-02 23:03:08,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924186868] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:08,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245412974] [2021-11-02 23:03:08,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:03:08,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:08,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:08,683 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:08,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-11-02 23:03:09,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-02 23:03:09,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:09,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:03:09,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:10,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245412974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:10,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:10,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 32 [2021-11-02 23:03:10,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975080539] [2021-11-02 23:03:10,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 23:03:10,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:10,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 23:03:10,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:03:10,145 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 32 states, 32 states have (on average 1.53125) internal successors, (49), 32 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) [2021-11-02 23:03:10,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:10,537 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-11-02 23:03:10,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:03:10,537 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 32 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 26 [2021-11-02 23:03:10,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:10,538 INFO L225 Difference]: With dead ends: 58 [2021-11-02 23:03:10,538 INFO L226 Difference]: Without dead ends: 54 [2021-11-02 23:03:10,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:03:10,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-02 23:03:10,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2021-11-02 23:03:10,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 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) [2021-11-02 23:03:10,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-11-02 23:03:10,589 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 26 [2021-11-02 23:03:10,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:10,589 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-11-02 23:03:10,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 32 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) [2021-11-02 23:03:10,590 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-11-02 23:03:10,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:03:10,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:10,590 INFO L513 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:10,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:10,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-11-02 23:03:10,803 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:10,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:10,804 INFO L85 PathProgramCache]: Analyzing trace with hash 480324337, now seen corresponding path program 82 times [2021-11-02 23:03:10,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:10,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316235686] [2021-11-02 23:03:10,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:10,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:11,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:11,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316235686] [2021-11-02 23:03:11,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316235686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:11,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843271387] [2021-11-02 23:03:11,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:03:11,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:11,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:11,071 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:11,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-11-02 23:03:12,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:03:12,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:12,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:03:12,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:12,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843271387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:12,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:12,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 23:03:12,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144459901] [2021-11-02 23:03:12,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:03:12,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:12,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:03:12,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:03:12,218 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-02 23:03:12,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:12,799 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-11-02 23:03:12,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:03:12,799 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) Word has length 26 [2021-11-02 23:03:12,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:12,799 INFO L225 Difference]: With dead ends: 76 [2021-11-02 23:03:12,799 INFO L226 Difference]: Without dead ends: 72 [2021-11-02 23:03:12,800 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:03:12,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-02 23:03:12,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2021-11-02 23:03:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 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) [2021-11-02 23:03:12,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-11-02 23:03:12,854 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 26 [2021-11-02 23:03:12,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:12,854 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-11-02 23:03:12,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-02 23:03:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-11-02 23:03:12,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:03:12,855 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:12,855 INFO L513 BasicCegarLoop]: trace histogram [11, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:12,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:13,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-11-02 23:03:13,055 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:13,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:13,056 INFO L85 PathProgramCache]: Analyzing trace with hash 67880658, now seen corresponding path program 83 times [2021-11-02 23:03:13,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:13,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555606689] [2021-11-02 23:03:13,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:13,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:13,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:13,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555606689] [2021-11-02 23:03:13,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555606689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:13,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126108419] [2021-11-02 23:03:13,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:03:13,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:13,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:13,320 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:13,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-11-02 23:03:14,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-02 23:03:14,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:14,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:03:14,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:15,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126108419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:15,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:15,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 23:03:15,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487420849] [2021-11-02 23:03:15,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:03:15,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:15,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:03:15,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:03:15,097 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-02 23:03:15,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:15,808 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2021-11-02 23:03:15,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 23:03:15,808 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) Word has length 26 [2021-11-02 23:03:15,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:15,809 INFO L225 Difference]: With dead ends: 88 [2021-11-02 23:03:15,809 INFO L226 Difference]: Without dead ends: 84 [2021-11-02 23:03:15,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=1736, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:03:15,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-02 23:03:15,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 46. [2021-11-02 23:03:15,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 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) [2021-11-02 23:03:15,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-11-02 23:03:15,859 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 26 [2021-11-02 23:03:15,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:15,860 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-11-02 23:03:15,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-02 23:03:15,860 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-11-02 23:03:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:03:15,860 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:15,861 INFO L513 BasicCegarLoop]: trace histogram [12, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:15,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:16,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-11-02 23:03:16,070 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:16,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:16,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1994238673, now seen corresponding path program 84 times [2021-11-02 23:03:16,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:16,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432879769] [2021-11-02 23:03:16,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:16,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:16,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:16,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432879769] [2021-11-02 23:03:16,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432879769] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:16,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490600113] [2021-11-02 23:03:16,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:03:16,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:16,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:16,415 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:16,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-11-02 23:03:17,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 23:03:17,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:17,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:03:17,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:17,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490600113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:17,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:17,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 23:03:17,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459175603] [2021-11-02 23:03:17,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:03:17,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:17,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:03:17,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:03:17,868 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-02 23:03:18,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:18,711 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2021-11-02 23:03:18,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 23:03:18,712 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) Word has length 26 [2021-11-02 23:03:18,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:18,712 INFO L225 Difference]: With dead ends: 99 [2021-11-02 23:03:18,712 INFO L226 Difference]: Without dead ends: 95 [2021-11-02 23:03:18,713 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=1820, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:03:18,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-02 23:03:18,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 46. [2021-11-02 23:03:18,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 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) [2021-11-02 23:03:18,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-11-02 23:03:18,766 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 26 [2021-11-02 23:03:18,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:18,766 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-11-02 23:03:18,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-02 23:03:18,766 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-11-02 23:03:18,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:03:18,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:18,767 INFO L513 BasicCegarLoop]: trace histogram [13, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:18,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-11-02 23:03:18,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-11-02 23:03:18,967 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:18,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:18,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1917831922, now seen corresponding path program 85 times [2021-11-02 23:03:18,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:18,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284640949] [2021-11-02 23:03:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:18,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:19,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:19,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284640949] [2021-11-02 23:03:19,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284640949] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:19,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833715490] [2021-11-02 23:03:19,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:03:19,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:19,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:19,260 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:19,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-11-02 23:03:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:20,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:03:20,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:20,500 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:20,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833715490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:20,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:20,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 23:03:20,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956714057] [2021-11-02 23:03:20,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:03:20,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:20,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:03:20,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:03:20,502 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-02 23:03:21,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:21,284 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2021-11-02 23:03:21,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 23:03:21,285 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) Word has length 26 [2021-11-02 23:03:21,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:21,285 INFO L225 Difference]: With dead ends: 109 [2021-11-02 23:03:21,285 INFO L226 Difference]: Without dead ends: 105 [2021-11-02 23:03:21,285 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 23:03:21,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-02 23:03:21,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 46. [2021-11-02 23:03:21,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 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) [2021-11-02 23:03:21,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-11-02 23:03:21,339 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 26 [2021-11-02 23:03:21,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:21,339 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-11-02 23:03:21,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-02 23:03:21,339 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-11-02 23:03:21,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:03:21,339 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:21,339 INFO L513 BasicCegarLoop]: trace histogram [14, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:21,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:21,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-11-02 23:03:21,540 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:21,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:21,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1409768783, now seen corresponding path program 86 times [2021-11-02 23:03:21,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:21,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703524943] [2021-11-02 23:03:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:21,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:21,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:21,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703524943] [2021-11-02 23:03:21,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703524943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:21,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100564036] [2021-11-02 23:03:21,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:03:21,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:21,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:21,835 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:21,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-11-02 23:03:22,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:03:22,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:22,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:03:22,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:23,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100564036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:23,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:23,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 23:03:23,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762197974] [2021-11-02 23:03:23,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:03:23,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:23,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:03:23,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:03:23,049 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-02 23:03:23,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:23,732 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2021-11-02 23:03:23,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:03:23,733 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) Word has length 26 [2021-11-02 23:03:23,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:23,733 INFO L225 Difference]: With dead ends: 118 [2021-11-02 23:03:23,733 INFO L226 Difference]: Without dead ends: 114 [2021-11-02 23:03:23,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=1283, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:03:23,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-02 23:03:23,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 46. [2021-11-02 23:03:23,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 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) [2021-11-02 23:03:23,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-11-02 23:03:23,796 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 26 [2021-11-02 23:03:23,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:23,796 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-11-02 23:03:23,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-02 23:03:23,796 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-11-02 23:03:23,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:03:23,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:23,796 INFO L513 BasicCegarLoop]: trace histogram [15, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:23,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:24,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:24,003 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:24,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:24,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1946572562, now seen corresponding path program 87 times [2021-11-02 23:03:24,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:24,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027194910] [2021-11-02 23:03:24,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:24,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:24,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:24,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027194910] [2021-11-02 23:03:24,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027194910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:24,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541303194] [2021-11-02 23:03:24,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:03:24,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:24,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:24,286 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:24,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-11-02 23:03:25,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-02 23:03:25,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:25,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:03:25,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:26,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541303194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:26,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:26,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 23:03:26,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641627058] [2021-11-02 23:03:26,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:03:26,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:26,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:03:26,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:03:26,046 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-02 23:03:26,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:26,725 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2021-11-02 23:03:26,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:03:26,726 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) Word has length 26 [2021-11-02 23:03:26,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:26,726 INFO L225 Difference]: With dead ends: 126 [2021-11-02 23:03:26,726 INFO L226 Difference]: Without dead ends: 122 [2021-11-02 23:03:26,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:03:26,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-02 23:03:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 46. [2021-11-02 23:03:26,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 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) [2021-11-02 23:03:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-11-02 23:03:26,782 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 26 [2021-11-02 23:03:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:26,782 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-11-02 23:03:26,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-02 23:03:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-11-02 23:03:26,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:03:26,783 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:26,783 INFO L513 BasicCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:26,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:26,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:26,983 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:26,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:26,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1362104977, now seen corresponding path program 88 times [2021-11-02 23:03:26,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:26,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830110999] [2021-11-02 23:03:26,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:26,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:27,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:27,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830110999] [2021-11-02 23:03:27,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830110999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:27,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265023889] [2021-11-02 23:03:27,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:03:27,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:27,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:27,287 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:27,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-11-02 23:03:28,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:03:28,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:28,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:03:28,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:28,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265023889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:28,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:28,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 23:03:28,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795913930] [2021-11-02 23:03:28,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:03:28,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:28,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:03:28,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:03:28,527 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-02 23:03:29,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:29,104 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2021-11-02 23:03:29,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 23:03:29,104 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) Word has length 26 [2021-11-02 23:03:29,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:29,105 INFO L225 Difference]: With dead ends: 133 [2021-11-02 23:03:29,105 INFO L226 Difference]: Without dead ends: 129 [2021-11-02 23:03:29,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:03:29,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-02 23:03:29,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 46. [2021-11-02 23:03:29,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 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) [2021-11-02 23:03:29,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-11-02 23:03:29,192 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 26 [2021-11-02 23:03:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:29,193 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-11-02 23:03:29,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-02 23:03:29,193 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-11-02 23:03:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:03:29,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:29,194 INFO L513 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:29,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:29,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-11-02 23:03:29,419 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:29,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:29,420 INFO L85 PathProgramCache]: Analyzing trace with hash -734958798, now seen corresponding path program 89 times [2021-11-02 23:03:29,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:29,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397777508] [2021-11-02 23:03:29,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:29,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:29,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:29,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397777508] [2021-11-02 23:03:29,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397777508] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:29,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565229041] [2021-11-02 23:03:29,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:03:29,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:29,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:29,731 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:29,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-11-02 23:03:31,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-02 23:03:31,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:31,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:03:31,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:31,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565229041] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:31,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:31,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 23:03:31,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640688873] [2021-11-02 23:03:31,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:03:31,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:31,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:03:31,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:03:31,531 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-02 23:03:32,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:32,141 INFO L93 Difference]: Finished difference Result 139 states and 149 transitions. [2021-11-02 23:03:32,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:03:32,142 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) Word has length 26 [2021-11-02 23:03:32,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:32,143 INFO L225 Difference]: With dead ends: 139 [2021-11-02 23:03:32,143 INFO L226 Difference]: Without dead ends: 135 [2021-11-02 23:03:32,143 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:03:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-02 23:03:32,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 46. [2021-11-02 23:03:32,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 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) [2021-11-02 23:03:32,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-11-02 23:03:32,222 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 26 [2021-11-02 23:03:32,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:32,222 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-11-02 23:03:32,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-02 23:03:32,222 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-11-02 23:03:32,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:03:32,223 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:32,223 INFO L513 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:32,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:32,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-11-02 23:03:32,432 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:32,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:32,433 INFO L85 PathProgramCache]: Analyzing trace with hash 859961969, now seen corresponding path program 18 times [2021-11-02 23:03:32,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:32,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702147545] [2021-11-02 23:03:32,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:32,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:32,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:32,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702147545] [2021-11-02 23:03:32,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702147545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:32,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955716283] [2021-11-02 23:03:32,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:03:32,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:32,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:32,717 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:32,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-11-02 23:03:34,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-02 23:03:34,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:34,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:03:34,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:34,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955716283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:34,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:34,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 23:03:34,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987849730] [2021-11-02 23:03:34,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:03:34,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:34,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:03:34,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:03:34,224 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-02 23:03:34,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:34,756 INFO L93 Difference]: Finished difference Result 147 states and 158 transitions. [2021-11-02 23:03:34,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:03:34,757 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) Word has length 26 [2021-11-02 23:03:34,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:34,757 INFO L225 Difference]: With dead ends: 147 [2021-11-02 23:03:34,757 INFO L226 Difference]: Without dead ends: 143 [2021-11-02 23:03:34,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:03:34,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-02 23:03:34,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 48. [2021-11-02 23:03:34,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 47 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:34,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2021-11-02 23:03:34,832 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 26 [2021-11-02 23:03:34,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:34,832 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2021-11-02 23:03:34,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-02 23:03:34,833 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2021-11-02 23:03:34,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 23:03:34,833 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:34,833 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:34,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:35,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:35,033 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:35,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:35,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1066765066, now seen corresponding path program 90 times [2021-11-02 23:03:35,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:35,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341563038] [2021-11-02 23:03:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:35,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:35,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:35,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341563038] [2021-11-02 23:03:35,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341563038] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:35,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923960237] [2021-11-02 23:03:35,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:03:35,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:35,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:35,352 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:35,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-11-02 23:03:36,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-02 23:03:36,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:36,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:03:36,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:36,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923960237] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:36,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:36,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 23 [2021-11-02 23:03:36,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575742656] [2021-11-02 23:03:36,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:03:36,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:36,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:03:36,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:03:36,751 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 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) [2021-11-02 23:03:37,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:37,185 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2021-11-02 23:03:37,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:03:37,186 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 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 27 [2021-11-02 23:03:37,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:37,186 INFO L225 Difference]: With dead ends: 62 [2021-11-02 23:03:37,186 INFO L226 Difference]: Without dead ends: 46 [2021-11-02 23:03:37,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=973, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:03:37,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-02 23:03:37,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-02 23:03:37,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 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) [2021-11-02 23:03:37,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-11-02 23:03:37,244 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 27 [2021-11-02 23:03:37,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:37,245 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-11-02 23:03:37,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 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) [2021-11-02 23:03:37,245 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-11-02 23:03:37,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 23:03:37,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:37,245 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:37,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:37,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:37,446 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:37,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:37,446 INFO L85 PathProgramCache]: Analyzing trace with hash 2006817943, now seen corresponding path program 91 times [2021-11-02 23:03:37,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:37,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64478611] [2021-11-02 23:03:37,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:37,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:37,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:37,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64478611] [2021-11-02 23:03:37,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64478611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:37,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903447811] [2021-11-02 23:03:37,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:03:37,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:37,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:37,756 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:37,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-11-02 23:03:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:38,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:03:38,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:39,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903447811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:39,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:39,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:03:39,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091604313] [2021-11-02 23:03:39,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:03:39,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:39,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:03:39,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:03:39,085 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:03:39,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:39,530 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-11-02 23:03:39,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:03:39,530 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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 27 [2021-11-02 23:03:39,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:39,530 INFO L225 Difference]: With dead ends: 64 [2021-11-02 23:03:39,530 INFO L226 Difference]: Without dead ends: 60 [2021-11-02 23:03:39,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:03:39,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-02 23:03:39,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2021-11-02 23:03:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 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) [2021-11-02 23:03:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2021-11-02 23:03:39,583 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 27 [2021-11-02 23:03:39,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:39,583 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2021-11-02 23:03:39,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:03:39,583 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2021-11-02 23:03:39,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 23:03:39,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:39,584 INFO L513 BasicCegarLoop]: trace histogram [11, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:39,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:39,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-11-02 23:03:39,784 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:39,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:39,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2105965782, now seen corresponding path program 92 times [2021-11-02 23:03:39,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:39,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119828874] [2021-11-02 23:03:39,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:39,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:40,098 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:40,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:40,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119828874] [2021-11-02 23:03:40,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119828874] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:40,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335697095] [2021-11-02 23:03:40,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:03:40,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:40,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:40,099 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:40,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-11-02 23:03:41,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:03:41,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:41,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:03:41,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:41,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335697095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:41,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:41,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:03:41,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065045133] [2021-11-02 23:03:41,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:03:41,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:41,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:03:41,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:03:41,462 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:03:42,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:42,169 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2021-11-02 23:03:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:03:42,170 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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 27 [2021-11-02 23:03:42,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:42,170 INFO L225 Difference]: With dead ends: 77 [2021-11-02 23:03:42,170 INFO L226 Difference]: Without dead ends: 73 [2021-11-02 23:03:42,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 23:03:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-02 23:03:42,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 47. [2021-11-02 23:03:42,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 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) [2021-11-02 23:03:42,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2021-11-02 23:03:42,249 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 27 [2021-11-02 23:03:42,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:42,249 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2021-11-02 23:03:42,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:03:42,249 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2021-11-02 23:03:42,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 23:03:42,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:42,250 INFO L513 BasicCegarLoop]: trace histogram [12, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:42,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:42,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-11-02 23:03:42,463 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:42,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:42,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1693522103, now seen corresponding path program 93 times [2021-11-02 23:03:42,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:42,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196377118] [2021-11-02 23:03:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:42,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:42,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:42,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196377118] [2021-11-02 23:03:42,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196377118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:42,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204909992] [2021-11-02 23:03:42,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:03:42,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:42,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:42,761 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:42,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-11-02 23:03:44,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-02 23:03:44,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:44,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:03:44,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:44,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204909992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:44,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:44,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:03:44,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390253664] [2021-11-02 23:03:44,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:03:44,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:44,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:03:44,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:03:44,554 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:03:45,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:45,328 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2021-11-02 23:03:45,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 23:03:45,329 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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 27 [2021-11-02 23:03:45,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:45,329 INFO L225 Difference]: With dead ends: 89 [2021-11-02 23:03:45,329 INFO L226 Difference]: Without dead ends: 85 [2021-11-02 23:03:45,329 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=1822, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:03:45,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-02 23:03:45,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 47. [2021-11-02 23:03:45,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 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) [2021-11-02 23:03:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2021-11-02 23:03:45,394 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 27 [2021-11-02 23:03:45,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:45,395 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2021-11-02 23:03:45,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:03:45,395 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2021-11-02 23:03:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 23:03:45,395 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:45,395 INFO L513 BasicCegarLoop]: trace histogram [13, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:45,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-11-02 23:03:45,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:45,596 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:45,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:45,596 INFO L85 PathProgramCache]: Analyzing trace with hash -675087178, now seen corresponding path program 94 times [2021-11-02 23:03:45,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:45,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412834012] [2021-11-02 23:03:45,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:45,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:45,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:45,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412834012] [2021-11-02 23:03:45,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412834012] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:45,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811277400] [2021-11-02 23:03:45,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:03:45,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:45,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:45,898 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:45,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-11-02 23:03:47,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:03:47,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:47,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:03:47,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:47,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811277400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:47,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:47,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:03:47,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908148100] [2021-11-02 23:03:47,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:03:47,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:47,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:03:47,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:03:47,252 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:03:48,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:48,074 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2021-11-02 23:03:48,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 23:03:48,074 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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 27 [2021-11-02 23:03:48,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:48,074 INFO L225 Difference]: With dead ends: 100 [2021-11-02 23:03:48,074 INFO L226 Difference]: Without dead ends: 96 [2021-11-02 23:03:48,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=1908, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:03:48,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-02 23:03:48,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 47. [2021-11-02 23:03:48,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 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) [2021-11-02 23:03:48,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2021-11-02 23:03:48,133 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 27 [2021-11-02 23:03:48,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:48,133 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2021-11-02 23:03:48,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:03:48,133 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2021-11-02 23:03:48,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 23:03:48,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:48,133 INFO L513 BasicCegarLoop]: trace histogram [14, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:48,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-11-02 23:03:48,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-11-02 23:03:48,334 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:48,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:48,334 INFO L85 PathProgramCache]: Analyzing trace with hash -751493929, now seen corresponding path program 95 times [2021-11-02 23:03:48,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:48,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208226969] [2021-11-02 23:03:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:48,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:48,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:48,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208226969] [2021-11-02 23:03:48,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208226969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:48,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449291238] [2021-11-02 23:03:48,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:03:48,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:48,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:48,622 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:48,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-11-02 23:03:50,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-02 23:03:50,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:50,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:03:50,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:50,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449291238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:50,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:50,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:03:50,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803139096] [2021-11-02 23:03:50,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:03:50,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:50,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:03:50,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:03:50,651 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:03:51,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:51,437 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2021-11-02 23:03:51,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 23:03:51,437 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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 27 [2021-11-02 23:03:51,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:51,437 INFO L225 Difference]: With dead ends: 110 [2021-11-02 23:03:51,437 INFO L226 Difference]: Without dead ends: 106 [2021-11-02 23:03:51,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=1741, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:03:51,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-02 23:03:51,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 47. [2021-11-02 23:03:51,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 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) [2021-11-02 23:03:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2021-11-02 23:03:51,504 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 27 [2021-11-02 23:03:51,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:51,504 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2021-11-02 23:03:51,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:03:51,505 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2021-11-02 23:03:51,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 23:03:51,505 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:51,505 INFO L513 BasicCegarLoop]: trace histogram [15, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:51,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-11-02 23:03:51,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-11-02 23:03:51,705 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:51,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:51,706 INFO L85 PathProgramCache]: Analyzing trace with hash 215872662, now seen corresponding path program 96 times [2021-11-02 23:03:51,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:51,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806402119] [2021-11-02 23:03:51,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:51,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:52,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:52,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806402119] [2021-11-02 23:03:52,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806402119] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:52,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988346198] [2021-11-02 23:03:52,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:03:52,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:52,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:52,028 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:52,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-11-02 23:03:53,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-02 23:03:53,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:53,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:03:53,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:53,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988346198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:53,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:53,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:03:53,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907490406] [2021-11-02 23:03:53,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:03:53,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:53,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:03:53,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:03:53,616 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:03:54,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:54,381 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2021-11-02 23:03:54,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 23:03:54,381 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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 27 [2021-11-02 23:03:54,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:54,381 INFO L225 Difference]: With dead ends: 119 [2021-11-02 23:03:54,382 INFO L226 Difference]: Without dead ends: 115 [2021-11-02 23:03:54,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 23:03:54,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-02 23:03:54,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 47. [2021-11-02 23:03:54,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 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) [2021-11-02 23:03:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2021-11-02 23:03:54,441 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 27 [2021-11-02 23:03:54,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:54,441 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2021-11-02 23:03:54,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:03:54,441 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2021-11-02 23:03:54,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 23:03:54,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:54,442 INFO L513 BasicCegarLoop]: trace histogram [16, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:54,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-11-02 23:03:54,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-11-02 23:03:54,642 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:54,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:54,642 INFO L85 PathProgramCache]: Analyzing trace with hash -722753289, now seen corresponding path program 97 times [2021-11-02 23:03:54,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:54,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892778412] [2021-11-02 23:03:54,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:54,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:54,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:54,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892778412] [2021-11-02 23:03:54,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892778412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:54,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124717010] [2021-11-02 23:03:54,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:03:54,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:54,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:54,934 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:54,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-11-02 23:03:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:56,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:03:56,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:56,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124717010] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:56,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:56,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:03:56,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695990981] [2021-11-02 23:03:56,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:03:56,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:56,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:03:56,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:03:56,353 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:03:57,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:57,015 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2021-11-02 23:03:57,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:03:57,016 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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 27 [2021-11-02 23:03:57,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:57,016 INFO L225 Difference]: With dead ends: 127 [2021-11-02 23:03:57,016 INFO L226 Difference]: Without dead ends: 123 [2021-11-02 23:03:57,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=1023, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:03:57,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-02 23:03:57,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 47. [2021-11-02 23:03:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 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) [2021-11-02 23:03:57,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2021-11-02 23:03:57,080 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 27 [2021-11-02 23:03:57,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:57,081 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2021-11-02 23:03:57,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:03:57,081 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2021-11-02 23:03:57,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 23:03:57,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:57,081 INFO L513 BasicCegarLoop]: trace histogram [17, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:57,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:57,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-11-02 23:03:57,287 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:57,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:57,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1307220874, now seen corresponding path program 98 times [2021-11-02 23:03:57,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:57,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398766229] [2021-11-02 23:03:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:57,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:57,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:57,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398766229] [2021-11-02 23:03:57,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398766229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:57,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112229545] [2021-11-02 23:03:57,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:03:57,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:57,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:57,577 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:57,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-11-02 23:03:58,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:03:58,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:58,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:03:58,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:58,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112229545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:58,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:58,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:03:58,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306597003] [2021-11-02 23:03:58,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:03:58,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:58,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:03:58,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=504, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:03:58,991 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:03:59,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:59,596 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2021-11-02 23:03:59,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:03:59,597 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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 27 [2021-11-02 23:03:59,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:59,597 INFO L225 Difference]: With dead ends: 134 [2021-11-02 23:03:59,597 INFO L226 Difference]: Without dead ends: 130 [2021-11-02 23:03:59,598 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:03:59,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-02 23:03:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 47. [2021-11-02 23:03:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 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) [2021-11-02 23:03:59,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2021-11-02 23:03:59,656 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 27 [2021-11-02 23:03:59,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:59,656 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2021-11-02 23:03:59,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:03:59,656 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2021-11-02 23:03:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 23:03:59,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:59,657 INFO L513 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:59,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-11-02 23:03:59,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:59,857 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:59,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:59,858 INFO L85 PathProgramCache]: Analyzing trace with hash 890682647, now seen corresponding path program 99 times [2021-11-02 23:03:59,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:59,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489834256] [2021-11-02 23:03:59,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:59,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:00,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:00,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489834256] [2021-11-02 23:04:00,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489834256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:00,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291448055] [2021-11-02 23:04:00,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:04:00,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:00,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:00,170 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:00,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-11-02 23:04:01,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-02 23:04:01,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:01,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:04:01,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:02,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291448055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:02,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:02,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:04:02,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149519219] [2021-11-02 23:04:02,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:04:02,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:02,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:04:02,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:04:02,124 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:04:02,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:02,769 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2021-11-02 23:04:02,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:04:02,769 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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 27 [2021-11-02 23:04:02,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:02,770 INFO L225 Difference]: With dead ends: 140 [2021-11-02 23:04:02,770 INFO L226 Difference]: Without dead ends: 136 [2021-11-02 23:04:02,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:04:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-02 23:04:02,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 47. [2021-11-02 23:04:02,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 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) [2021-11-02 23:04:02,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2021-11-02 23:04:02,829 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 27 [2021-11-02 23:04:02,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:02,829 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2021-11-02 23:04:02,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:04:02,830 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2021-11-02 23:04:02,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 23:04:02,830 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:02,830 INFO L513 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:02,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-11-02 23:04:03,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-11-02 23:04:03,031 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:03,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:03,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1809363882, now seen corresponding path program 19 times [2021-11-02 23:04:03,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:03,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551527350] [2021-11-02 23:04:03,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:03,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:03,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:03,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551527350] [2021-11-02 23:04:03,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551527350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:03,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947481708] [2021-11-02 23:04:03,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:04:03,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:03,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:03,389 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:03,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-11-02 23:04:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:04,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:04:04,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:04,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947481708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:04,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:04,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:04:04,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436728941] [2021-11-02 23:04:04,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:04:04,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:04,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:04:04,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:04:04,849 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:04:05,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:05,416 INFO L93 Difference]: Finished difference Result 148 states and 159 transitions. [2021-11-02 23:04:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:04:05,417 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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 27 [2021-11-02 23:04:05,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:05,417 INFO L225 Difference]: With dead ends: 148 [2021-11-02 23:04:05,417 INFO L226 Difference]: Without dead ends: 144 [2021-11-02 23:04:05,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:04:05,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-02 23:04:05,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 49. [2021-11-02 23:04:05,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:05,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2021-11-02 23:04:05,474 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 27 [2021-11-02 23:04:05,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:05,474 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2021-11-02 23:04:05,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-11-02 23:04:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2021-11-02 23:04:05,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 23:04:05,474 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:05,474 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:05,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-11-02 23:04:05,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:05,675 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:05,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:05,675 INFO L85 PathProgramCache]: Analyzing trace with hash 2083479473, now seen corresponding path program 100 times [2021-11-02 23:04:05,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:05,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427308548] [2021-11-02 23:04:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:05,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:07,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:07,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427308548] [2021-11-02 23:04:07,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427308548] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:07,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006144669] [2021-11-02 23:04:07,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:04:07,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:07,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:07,990 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:07,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-11-02 23:04:09,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:04:09,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:09,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:04:09,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:11,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006144669] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:11,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:11,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14] total 35 [2021-11-02 23:04:11,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317779958] [2021-11-02 23:04:11,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-02 23:04:11,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:11,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-02 23:04:11,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1093, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 23:04:11,473 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:12,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:12,201 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2021-11-02 23:04:12,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:04:12,201 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 23:04:12,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:12,202 INFO L225 Difference]: With dead ends: 63 [2021-11-02 23:04:12,202 INFO L226 Difference]: Without dead ends: 59 [2021-11-02 23:04:12,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:04:12,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-02 23:04:12,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2021-11-02 23:04:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 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) [2021-11-02 23:04:12,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2021-11-02 23:04:12,269 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 28 [2021-11-02 23:04:12,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:12,269 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2021-11-02 23:04:12,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:12,269 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2021-11-02 23:04:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 23:04:12,269 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:12,270 INFO L513 BasicCegarLoop]: trace histogram [11, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:12,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-11-02 23:04:12,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:12,470 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:12,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:12,470 INFO L85 PathProgramCache]: Analyzing trace with hash 862095186, now seen corresponding path program 101 times [2021-11-02 23:04:12,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:12,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825445004] [2021-11-02 23:04:12,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:12,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:12,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:12,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825445004] [2021-11-02 23:04:12,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825445004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:12,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247059914] [2021-11-02 23:04:12,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:04:12,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:12,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:12,788 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:12,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-11-02 23:04:14,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-02 23:04:14,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:14,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:04:14,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:14,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247059914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:14,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:14,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 23:04:14,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100794329] [2021-11-02 23:04:14,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:04:14,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:14,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:04:14,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:04:14,673 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:15,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:15,356 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2021-11-02 23:04:15,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 23:04:15,356 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 23:04:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:15,356 INFO L225 Difference]: With dead ends: 82 [2021-11-02 23:04:15,356 INFO L226 Difference]: Without dead ends: 78 [2021-11-02 23:04:15,357 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=1740, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:04:15,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-02 23:04:15,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2021-11-02 23:04:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 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) [2021-11-02 23:04:15,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2021-11-02 23:04:15,427 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 28 [2021-11-02 23:04:15,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:15,428 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2021-11-02 23:04:15,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:15,428 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2021-11-02 23:04:15,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 23:04:15,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:15,428 INFO L513 BasicCegarLoop]: trace histogram [12, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:15,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:15,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:15,629 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:15,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:15,629 INFO L85 PathProgramCache]: Analyzing trace with hash 961243025, now seen corresponding path program 102 times [2021-11-02 23:04:15,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:15,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357442892] [2021-11-02 23:04:15,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:15,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:15,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:15,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357442892] [2021-11-02 23:04:15,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357442892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:15,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394281035] [2021-11-02 23:04:15,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:04:15,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:15,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:15,940 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:15,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-11-02 23:04:17,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 23:04:17,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:17,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:04:17,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:17,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394281035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:17,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:17,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 23:04:17,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563118512] [2021-11-02 23:04:17,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:04:17,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:17,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:04:17,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:04:17,620 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:18,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:18,526 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-11-02 23:04:18,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 23:04:18,527 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 23:04:18,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:18,527 INFO L225 Difference]: With dead ends: 95 [2021-11-02 23:04:18,527 INFO L226 Difference]: Without dead ends: 91 [2021-11-02 23:04:18,528 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=2176, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:04:18,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-02 23:04:18,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 50. [2021-11-02 23:04:18,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 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) [2021-11-02 23:04:18,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2021-11-02 23:04:18,605 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 28 [2021-11-02 23:04:18,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:18,605 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2021-11-02 23:04:18,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:18,605 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2021-11-02 23:04:18,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 23:04:18,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:18,606 INFO L513 BasicCegarLoop]: trace histogram [13, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:18,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:18,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-11-02 23:04:18,806 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:18,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:18,807 INFO L85 PathProgramCache]: Analyzing trace with hash 548799346, now seen corresponding path program 103 times [2021-11-02 23:04:18,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:18,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878749103] [2021-11-02 23:04:18,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:18,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:19,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:19,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878749103] [2021-11-02 23:04:19,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878749103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:19,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396116012] [2021-11-02 23:04:19,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:04:19,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:19,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:19,155 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:19,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-11-02 23:04:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:20,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:04:20,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:20,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396116012] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:20,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:20,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 23:04:20,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748517702] [2021-11-02 23:04:20,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:04:20,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:20,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:04:20,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:04:20,660 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:21,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:21,682 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2021-11-02 23:04:21,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 23:04:21,690 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 23:04:21,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:21,690 INFO L225 Difference]: With dead ends: 107 [2021-11-02 23:04:21,690 INFO L226 Difference]: Without dead ends: 103 [2021-11-02 23:04:21,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=2365, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 23:04:21,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-02 23:04:21,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 50. [2021-11-02 23:04:21,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 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) [2021-11-02 23:04:21,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2021-11-02 23:04:21,766 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 28 [2021-11-02 23:04:21,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:21,766 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2021-11-02 23:04:21,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:21,766 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2021-11-02 23:04:21,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 23:04:21,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:21,767 INFO L513 BasicCegarLoop]: trace histogram [14, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:21,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:21,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-11-02 23:04:21,967 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:21,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:21,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1819809935, now seen corresponding path program 104 times [2021-11-02 23:04:21,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:21,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140306253] [2021-11-02 23:04:21,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:21,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:22,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:22,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140306253] [2021-11-02 23:04:22,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140306253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:22,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857863069] [2021-11-02 23:04:22,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:04:22,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:22,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:22,293 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:22,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-11-02 23:04:23,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:04:23,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:23,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:04:23,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:23,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857863069] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:23,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:23,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 23:04:23,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909009846] [2021-11-02 23:04:23,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:04:23,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:23,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:04:23,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:04:23,826 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:24,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:24,856 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2021-11-02 23:04:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 23:04:24,857 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 23:04:24,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:24,857 INFO L225 Difference]: With dead ends: 118 [2021-11-02 23:04:24,857 INFO L226 Difference]: Without dead ends: 114 [2021-11-02 23:04:24,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=2271, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 23:04:24,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-02 23:04:24,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 50. [2021-11-02 23:04:24,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 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) [2021-11-02 23:04:24,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2021-11-02 23:04:24,929 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 28 [2021-11-02 23:04:24,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:24,929 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2021-11-02 23:04:24,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:24,929 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2021-11-02 23:04:24,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 23:04:24,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:24,930 INFO L513 BasicCegarLoop]: trace histogram [15, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:24,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-11-02 23:04:25,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-11-02 23:04:25,130 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:25,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1896216686, now seen corresponding path program 105 times [2021-11-02 23:04:25,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:25,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949320733] [2021-11-02 23:04:25,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:25,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:25,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:25,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949320733] [2021-11-02 23:04:25,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949320733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:25,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460206224] [2021-11-02 23:04:25,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:04:25,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:25,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:25,451 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:25,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-11-02 23:04:27,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-02 23:04:27,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:27,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 23:04:27,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:27,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460206224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:27,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:27,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 23:04:27,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676212920] [2021-11-02 23:04:27,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:04:27,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:27,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:04:27,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:04:27,593 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:28,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:28,717 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2021-11-02 23:04:28,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 23:04:28,717 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 23:04:28,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:28,718 INFO L225 Difference]: With dead ends: 128 [2021-11-02 23:04:28,718 INFO L226 Difference]: Without dead ends: 124 [2021-11-02 23:04:28,718 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=1912, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:04:28,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-02 23:04:28,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 50. [2021-11-02 23:04:28,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 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) [2021-11-02 23:04:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2021-11-02 23:04:28,797 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 28 [2021-11-02 23:04:28,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:28,797 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2021-11-02 23:04:28,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:28,797 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2021-11-02 23:04:28,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 23:04:28,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:28,797 INFO L513 BasicCegarLoop]: trace histogram [16, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:28,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-11-02 23:04:28,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-11-02 23:04:28,998 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:28,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:28,998 INFO L85 PathProgramCache]: Analyzing trace with hash -928850095, now seen corresponding path program 106 times [2021-11-02 23:04:28,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:28,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232850354] [2021-11-02 23:04:28,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:28,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:29,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:29,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232850354] [2021-11-02 23:04:29,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232850354] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:29,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200056356] [2021-11-02 23:04:29,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:04:29,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:29,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:29,315 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:29,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-11-02 23:04:30,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:04:30,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:30,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:04:30,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:30,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200056356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:30,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:30,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 23:04:30,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176205058] [2021-11-02 23:04:30,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:04:30,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:30,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:04:30,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=548, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:04:30,877 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:31,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:31,811 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2021-11-02 23:04:31,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 23:04:31,811 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 23:04:31,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:31,811 INFO L225 Difference]: With dead ends: 137 [2021-11-02 23:04:31,811 INFO L226 Difference]: Without dead ends: 133 [2021-11-02 23:04:31,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=1433, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:04:31,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-02 23:04:31,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 50. [2021-11-02 23:04:31,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 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) [2021-11-02 23:04:31,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2021-11-02 23:04:31,891 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 28 [2021-11-02 23:04:31,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:31,891 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2021-11-02 23:04:31,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:31,892 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2021-11-02 23:04:31,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 23:04:31,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:31,892 INFO L513 BasicCegarLoop]: trace histogram [17, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:31,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-11-02 23:04:32,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:32,095 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:32,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:32,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1867476046, now seen corresponding path program 107 times [2021-11-02 23:04:32,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:32,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405274853] [2021-11-02 23:04:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:32,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:32,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:32,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405274853] [2021-11-02 23:04:32,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405274853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:32,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120629232] [2021-11-02 23:04:32,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:04:32,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:32,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:32,410 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:32,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-11-02 23:04:34,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-02 23:04:34,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:34,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:04:34,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:34,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120629232] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:34,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:34,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 23:04:34,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536458571] [2021-11-02 23:04:34,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:04:34,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:34,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:04:34,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:04:34,424 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:35,272 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2021-11-02 23:04:35,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:04:35,273 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 23:04:35,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:35,273 INFO L225 Difference]: With dead ends: 145 [2021-11-02 23:04:35,274 INFO L226 Difference]: Without dead ends: 141 [2021-11-02 23:04:35,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 23:04:35,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-02 23:04:35,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 50. [2021-11-02 23:04:35,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 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) [2021-11-02 23:04:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2021-11-02 23:04:35,356 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 28 [2021-11-02 23:04:35,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:35,356 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2021-11-02 23:04:35,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2021-11-02 23:04:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 23:04:35,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:35,357 INFO L513 BasicCegarLoop]: trace histogram [18, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:35,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-11-02 23:04:35,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:35,561 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:35,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:35,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1843023665, now seen corresponding path program 108 times [2021-11-02 23:04:35,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:35,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104124244] [2021-11-02 23:04:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:35,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:35,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:35,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104124244] [2021-11-02 23:04:35,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104124244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:35,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588560785] [2021-11-02 23:04:35,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:04:35,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:35,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:35,910 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:35,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-11-02 23:04:38,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-02 23:04:38,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:38,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:04:38,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:38,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588560785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:38,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:38,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 23:04:38,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809645450] [2021-11-02 23:04:38,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:04:38,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:38,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:04:38,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:04:38,607 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:39,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:39,606 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2021-11-02 23:04:39,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:04:39,606 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 23:04:39,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:39,607 INFO L225 Difference]: With dead ends: 152 [2021-11-02 23:04:39,607 INFO L226 Difference]: Without dead ends: 148 [2021-11-02 23:04:39,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:04:39,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-02 23:04:39,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 50. [2021-11-02 23:04:39,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 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) [2021-11-02 23:04:39,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2021-11-02 23:04:39,716 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 28 [2021-11-02 23:04:39,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:39,716 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2021-11-02 23:04:39,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:39,716 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2021-11-02 23:04:39,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 23:04:39,717 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:39,717 INFO L513 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:39,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-11-02 23:04:39,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:39,919 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:39,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:39,920 INFO L85 PathProgramCache]: Analyzing trace with hash -254040110, now seen corresponding path program 109 times [2021-11-02 23:04:39,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:39,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070433439] [2021-11-02 23:04:39,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:39,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:40,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:40,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070433439] [2021-11-02 23:04:40,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070433439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:40,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340267390] [2021-11-02 23:04:40,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:04:40,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:40,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:40,243 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:40,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-11-02 23:04:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:41,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:04:41,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:41,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340267390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:41,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:41,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 23:04:41,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240202142] [2021-11-02 23:04:41,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:04:41,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:41,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:04:41,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:04:41,880 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:42,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:42,675 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2021-11-02 23:04:42,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 23:04:42,676 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 23:04:42,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:42,676 INFO L225 Difference]: With dead ends: 158 [2021-11-02 23:04:42,676 INFO L226 Difference]: Without dead ends: 154 [2021-11-02 23:04:42,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:04:42,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-02 23:04:42,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 50. [2021-11-02 23:04:42,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 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) [2021-11-02 23:04:42,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2021-11-02 23:04:42,758 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 28 [2021-11-02 23:04:42,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:42,759 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2021-11-02 23:04:42,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:42,759 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2021-11-02 23:04:42,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 23:04:42,759 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:42,759 INFO L513 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:42,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-11-02 23:04:42,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-11-02 23:04:42,960 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:42,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:42,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1340880657, now seen corresponding path program 20 times [2021-11-02 23:04:42,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:42,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281738195] [2021-11-02 23:04:42,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:42,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:43,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:43,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281738195] [2021-11-02 23:04:43,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281738195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:43,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792533631] [2021-11-02 23:04:43,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:04:43,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:43,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:43,374 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:43,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-11-02 23:04:44,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:04:44,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:44,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:04:44,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:44,995 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:44,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792533631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:44,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:44,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 23:04:44,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591471666] [2021-11-02 23:04:44,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:04:44,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:44,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:04:44,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:04:44,996 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:45,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:45,784 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2021-11-02 23:04:45,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:04:45,785 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 23:04:45,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:45,785 INFO L225 Difference]: With dead ends: 166 [2021-11-02 23:04:45,785 INFO L226 Difference]: Without dead ends: 162 [2021-11-02 23:04:45,785 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:04:45,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-02 23:04:45,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 52. [2021-11-02 23:04:45,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:45,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2021-11-02 23:04:45,868 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 28 [2021-11-02 23:04:45,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:45,869 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2021-11-02 23:04:45,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:45,869 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2021-11-02 23:04:45,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:04:45,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:45,870 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:45,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:46,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:46,083 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:46,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:46,084 INFO L85 PathProgramCache]: Analyzing trace with hash 165019607, now seen corresponding path program 110 times [2021-11-02 23:04:46,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:46,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997496921] [2021-11-02 23:04:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:46,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:46,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:46,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997496921] [2021-11-02 23:04:46,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997496921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:46,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941885332] [2021-11-02 23:04:46,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:04:46,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:46,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:46,392 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:46,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-11-02 23:04:47,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:04:47,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:47,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:04:47,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:48,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941885332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:48,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:48,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 25 [2021-11-02 23:04:48,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925069227] [2021-11-02 23:04:48,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:04:48,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:48,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:04:48,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:04:48,113 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 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) [2021-11-02 23:04:48,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:48,631 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2021-11-02 23:04:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:04:48,631 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 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 29 [2021-11-02 23:04:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:48,632 INFO L225 Difference]: With dead ends: 67 [2021-11-02 23:04:48,632 INFO L226 Difference]: Without dead ends: 50 [2021-11-02 23:04:48,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:04:48,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-02 23:04:48,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-02 23:04:48,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 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) [2021-11-02 23:04:48,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2021-11-02 23:04:48,730 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 29 [2021-11-02 23:04:48,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:48,730 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2021-11-02 23:04:48,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 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) [2021-11-02 23:04:48,730 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2021-11-02 23:04:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:04:48,730 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:48,730 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:48,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-11-02 23:04:48,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:48,931 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:48,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:48,931 INFO L85 PathProgramCache]: Analyzing trace with hash 956812374, now seen corresponding path program 111 times [2021-11-02 23:04:48,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:48,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250678967] [2021-11-02 23:04:48,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:48,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:49,265 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:49,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:49,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250678967] [2021-11-02 23:04:49,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250678967] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:49,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880700286] [2021-11-02 23:04:49,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:04:49,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:49,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:49,266 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:49,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-11-02 23:04:51,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-02 23:04:51,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:51,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:04:51,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:51,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880700286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:51,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:51,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-02 23:04:51,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371563558] [2021-11-02 23:04:51,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:04:51,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:51,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:04:51,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:04:51,547 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:04:52,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:52,040 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2021-11-02 23:04:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 23:04:52,040 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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 29 [2021-11-02 23:04:52,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:52,040 INFO L225 Difference]: With dead ends: 69 [2021-11-02 23:04:52,040 INFO L226 Difference]: Without dead ends: 65 [2021-11-02 23:04:52,041 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:04:52,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-02 23:04:52,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2021-11-02 23:04:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:52,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2021-11-02 23:04:52,136 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 29 [2021-11-02 23:04:52,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:52,136 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2021-11-02 23:04:52,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:04:52,136 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2021-11-02 23:04:52,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:04:52,137 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:52,137 INFO L513 BasicCegarLoop]: trace histogram [12, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:52,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-11-02 23:04:52,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-11-02 23:04:52,337 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:52,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:52,338 INFO L85 PathProgramCache]: Analyzing trace with hash -264571913, now seen corresponding path program 112 times [2021-11-02 23:04:52,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:52,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253248248] [2021-11-02 23:04:52,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:52,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:52,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:52,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253248248] [2021-11-02 23:04:52,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253248248] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:52,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234774992] [2021-11-02 23:04:52,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:04:52,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:52,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:52,680 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:52,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-11-02 23:04:54,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:04:54,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:54,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:04:54,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:54,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234774992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:54,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:54,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-02 23:04:54,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994509651] [2021-11-02 23:04:54,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:04:54,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:54,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:04:54,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:04:54,375 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:04:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:55,140 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2021-11-02 23:04:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 23:04:55,140 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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 29 [2021-11-02 23:04:55,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:55,140 INFO L225 Difference]: With dead ends: 83 [2021-11-02 23:04:55,140 INFO L226 Difference]: Without dead ends: 79 [2021-11-02 23:04:55,141 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=1826, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:04:55,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-02 23:04:55,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 51. [2021-11-02 23:04:55,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:55,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2021-11-02 23:04:55,233 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 29 [2021-11-02 23:04:55,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:55,233 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2021-11-02 23:04:55,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:04:55,233 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2021-11-02 23:04:55,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:04:55,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:55,233 INFO L513 BasicCegarLoop]: trace histogram [13, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:55,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:55,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-11-02 23:04:55,434 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:55,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:55,434 INFO L85 PathProgramCache]: Analyzing trace with hash -165424074, now seen corresponding path program 113 times [2021-11-02 23:04:55,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:55,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263897543] [2021-11-02 23:04:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:55,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:55,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:55,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263897543] [2021-11-02 23:04:55,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263897543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:55,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17312612] [2021-11-02 23:04:55,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:04:55,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:55,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:55,778 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:55,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-11-02 23:04:59,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-02 23:04:59,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:59,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:04:59,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:59,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17312612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:59,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:59,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-02 23:04:59,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134548325] [2021-11-02 23:04:59,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:04:59,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:59,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:04:59,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:04:59,209 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:05:00,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:00,193 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2021-11-02 23:05:00,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 23:05:00,193 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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 29 [2021-11-02 23:05:00,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:00,193 INFO L225 Difference]: With dead ends: 96 [2021-11-02 23:05:00,193 INFO L226 Difference]: Without dead ends: 92 [2021-11-02 23:05:00,194 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 23:05:00,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-02 23:05:00,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 51. [2021-11-02 23:05:00,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:00,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2021-11-02 23:05:00,291 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 29 [2021-11-02 23:05:00,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:00,291 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2021-11-02 23:05:00,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:05:00,291 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2021-11-02 23:05:00,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:05:00,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:00,291 INFO L513 BasicCegarLoop]: trace histogram [14, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:00,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-11-02 23:05:00,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:00,492 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:00,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:00,492 INFO L85 PathProgramCache]: Analyzing trace with hash -577867753, now seen corresponding path program 114 times [2021-11-02 23:05:00,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:00,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291127088] [2021-11-02 23:05:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:00,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:00,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:00,850 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:00,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:00,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291127088] [2021-11-02 23:05:00,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291127088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:00,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553608850] [2021-11-02 23:05:00,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:05:00,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:00,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:00,852 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:00,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-11-02 23:05:02,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-02 23:05:02,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:02,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:05:02,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:02,799 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:02,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553608850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:02,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:02,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-02 23:05:02,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118110147] [2021-11-02 23:05:02,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:05:02,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:02,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:05:02,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:05:02,801 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:05:03,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:03,932 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2021-11-02 23:05:03,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-02 23:05:03,933 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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 29 [2021-11-02 23:05:03,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:03,933 INFO L225 Difference]: With dead ends: 108 [2021-11-02 23:05:03,933 INFO L226 Difference]: Without dead ends: 104 [2021-11-02 23:05:03,934 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=187, Invalid=2465, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 23:05:03,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-02 23:05:04,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 51. [2021-11-02 23:05:04,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:04,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2021-11-02 23:05:04,035 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 29 [2021-11-02 23:05:04,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:04,035 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2021-11-02 23:05:04,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:05:04,035 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2021-11-02 23:05:04,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:05:04,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:04,036 INFO L513 BasicCegarLoop]: trace histogram [15, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:04,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-11-02 23:05:04,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-11-02 23:05:04,236 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:04,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:04,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1348490262, now seen corresponding path program 115 times [2021-11-02 23:05:04,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:04,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892184422] [2021-11-02 23:05:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:04,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:04,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:04,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892184422] [2021-11-02 23:05:04,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892184422] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:04,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428665739] [2021-11-02 23:05:04,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:05:04,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:04,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:04,577 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:04,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-11-02 23:05:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:06,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:05:06,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:06,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428665739] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:06,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:06,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-02 23:05:06,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182022359] [2021-11-02 23:05:06,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:05:06,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:06,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:05:06,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:05:06,299 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:05:07,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:07,523 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2021-11-02 23:05:07,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-02 23:05:07,524 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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 29 [2021-11-02 23:05:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:07,524 INFO L225 Difference]: With dead ends: 119 [2021-11-02 23:05:07,524 INFO L226 Difference]: Without dead ends: 115 [2021-11-02 23:05:07,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=2369, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 23:05:07,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-02 23:05:07,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 51. [2021-11-02 23:05:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:07,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2021-11-02 23:05:07,655 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 29 [2021-11-02 23:05:07,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:07,655 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2021-11-02 23:05:07,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:05:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2021-11-02 23:05:07,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:05:07,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:07,656 INFO L513 BasicCegarLoop]: trace histogram [16, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:07,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-11-02 23:05:07,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-11-02 23:05:07,856 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:07,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:07,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1272083511, now seen corresponding path program 116 times [2021-11-02 23:05:07,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:07,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747589408] [2021-11-02 23:05:07,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:07,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:08,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:08,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747589408] [2021-11-02 23:05:08,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747589408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:08,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111729281] [2021-11-02 23:05:08,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:05:08,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:08,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:08,216 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:08,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-11-02 23:05:09,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:05:09,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:09,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:05:09,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:09,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111729281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:09,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:09,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-02 23:05:09,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205484384] [2021-11-02 23:05:09,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:05:09,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:09,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:05:09,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=595, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:05:09,961 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:05:11,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:11,153 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2021-11-02 23:05:11,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 23:05:11,153 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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 29 [2021-11-02 23:05:11,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:11,154 INFO L225 Difference]: With dead ends: 129 [2021-11-02 23:05:11,154 INFO L226 Difference]: Without dead ends: 125 [2021-11-02 23:05:11,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=2002, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 23:05:11,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-02 23:05:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 51. [2021-11-02 23:05:11,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2021-11-02 23:05:11,261 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 29 [2021-11-02 23:05:11,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:11,261 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2021-11-02 23:05:11,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:05:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2021-11-02 23:05:11,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:05:11,261 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:11,261 INFO L513 BasicCegarLoop]: trace histogram [17, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:11,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-11-02 23:05:11,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:11,462 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:11,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:11,462 INFO L85 PathProgramCache]: Analyzing trace with hash -2055517194, now seen corresponding path program 117 times [2021-11-02 23:05:11,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:11,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975475033] [2021-11-02 23:05:11,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:11,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:11,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:11,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975475033] [2021-11-02 23:05:11,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975475033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:11,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871240189] [2021-11-02 23:05:11,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:05:11,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:11,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:11,813 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:11,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-11-02 23:05:13,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-02 23:05:13,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:13,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:05:13,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:13,932 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:13,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871240189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:13,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:13,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-02 23:05:13,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882097942] [2021-11-02 23:05:13,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:05:13,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:13,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:05:13,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:05:13,934 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:05:14,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:14,961 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2021-11-02 23:05:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 23:05:14,962 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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 29 [2021-11-02 23:05:14,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:14,962 INFO L225 Difference]: With dead ends: 138 [2021-11-02 23:05:14,962 INFO L226 Difference]: Without dead ends: 134 [2021-11-02 23:05:14,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=1511, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 23:05:14,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-02 23:05:15,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 51. [2021-11-02 23:05:15,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:15,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2021-11-02 23:05:15,070 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 29 [2021-11-02 23:05:15,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:15,070 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2021-11-02 23:05:15,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:05:15,070 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2021-11-02 23:05:15,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:05:15,070 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:15,070 INFO L513 BasicCegarLoop]: trace histogram [18, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:15,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-11-02 23:05:15,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-11-02 23:05:15,271 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:15,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:15,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1300824151, now seen corresponding path program 118 times [2021-11-02 23:05:15,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:15,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675569636] [2021-11-02 23:05:15,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:15,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:15,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:15,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675569636] [2021-11-02 23:05:15,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675569636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:15,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550741308] [2021-11-02 23:05:15,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:05:15,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:15,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:15,611 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:15,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-11-02 23:05:17,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:05:17,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:17,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:05:17,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:17,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550741308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:17,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:17,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-02 23:05:17,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888799800] [2021-11-02 23:05:17,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:05:17,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:17,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:05:17,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:05:17,408 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:05:18,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:18,390 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2021-11-02 23:05:18,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:05:18,390 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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 29 [2021-11-02 23:05:18,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:18,391 INFO L225 Difference]: With dead ends: 146 [2021-11-02 23:05:18,391 INFO L226 Difference]: Without dead ends: 142 [2021-11-02 23:05:18,391 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:05:18,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-02 23:05:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 51. [2021-11-02 23:05:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2021-11-02 23:05:18,487 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 29 [2021-11-02 23:05:18,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:18,487 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2021-11-02 23:05:18,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:05:18,487 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2021-11-02 23:05:18,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:05:18,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:18,487 INFO L513 BasicCegarLoop]: trace histogram [19, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:18,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:18,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-11-02 23:05:18,688 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:18,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:18,688 INFO L85 PathProgramCache]: Analyzing trace with hash 716356566, now seen corresponding path program 119 times [2021-11-02 23:05:18,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:18,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288670131] [2021-11-02 23:05:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:18,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:19,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:19,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288670131] [2021-11-02 23:05:19,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288670131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:19,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896609011] [2021-11-02 23:05:19,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:05:19,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:19,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:19,072 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:19,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-11-02 23:05:21,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-02 23:05:21,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:21,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:05:21,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:21,565 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:21,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896609011] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:21,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:21,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-02 23:05:21,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360381041] [2021-11-02 23:05:21,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:05:21,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:21,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:05:21,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=598, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:05:21,566 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:05:22,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:22,498 INFO L93 Difference]: Finished difference Result 153 states and 164 transitions. [2021-11-02 23:05:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:05:22,499 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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 29 [2021-11-02 23:05:22,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:22,499 INFO L225 Difference]: With dead ends: 153 [2021-11-02 23:05:22,499 INFO L226 Difference]: Without dead ends: 149 [2021-11-02 23:05:22,500 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:05:22,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-02 23:05:22,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 51. [2021-11-02 23:05:22,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:22,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2021-11-02 23:05:22,599 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 29 [2021-11-02 23:05:22,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:22,599 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2021-11-02 23:05:22,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:05:22,599 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2021-11-02 23:05:22,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:05:22,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:22,599 INFO L513 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:22,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-11-02 23:05:22,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:22,800 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:22,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:22,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1380707209, now seen corresponding path program 120 times [2021-11-02 23:05:22,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:22,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576225581] [2021-11-02 23:05:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:22,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:23,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:23,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576225581] [2021-11-02 23:05:23,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576225581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:23,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507315163] [2021-11-02 23:05:23,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:05:23,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:23,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:23,133 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:23,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-11-02 23:05:25,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-02 23:05:25,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:25,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:05:25,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:25,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507315163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:25,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:25,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-02 23:05:25,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821703883] [2021-11-02 23:05:25,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:05:25,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:25,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:05:25,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:05:25,295 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:05:26,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:26,212 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2021-11-02 23:05:26,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:05:26,213 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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 29 [2021-11-02 23:05:26,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:26,213 INFO L225 Difference]: With dead ends: 159 [2021-11-02 23:05:26,213 INFO L226 Difference]: Without dead ends: 155 [2021-11-02 23:05:26,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:05:26,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-02 23:05:26,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 51. [2021-11-02 23:05:26,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:26,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2021-11-02 23:05:26,312 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 29 [2021-11-02 23:05:26,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:26,312 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2021-11-02 23:05:26,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:05:26,312 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2021-11-02 23:05:26,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:05:26,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:26,313 INFO L513 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:26,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-11-02 23:05:26,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:26,515 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:26,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:26,516 INFO L85 PathProgramCache]: Analyzing trace with hash 214213558, now seen corresponding path program 21 times [2021-11-02 23:05:26,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:26,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158649428] [2021-11-02 23:05:26,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:26,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:26,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:26,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158649428] [2021-11-02 23:05:26,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158649428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:26,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900574961] [2021-11-02 23:05:26,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:05:26,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:26,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:26,869 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:26,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-11-02 23:05:29,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-02 23:05:29,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:29,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:05:29,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:29,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900574961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:29,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:29,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-02 23:05:29,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046336148] [2021-11-02 23:05:29,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:05:29,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:29,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:05:29,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:05:29,802 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:05:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:30,635 INFO L93 Difference]: Finished difference Result 167 states and 179 transitions. [2021-11-02 23:05:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 23:05:30,635 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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 29 [2021-11-02 23:05:30,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:30,636 INFO L225 Difference]: With dead ends: 167 [2021-11-02 23:05:30,636 INFO L226 Difference]: Without dead ends: 163 [2021-11-02 23:05:30,636 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=647, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:05:30,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-02 23:05:30,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 53. [2021-11-02 23:05:30,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.25) internal successors, (65), 52 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) [2021-11-02 23:05:30,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2021-11-02 23:05:30,754 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 29 [2021-11-02 23:05:30,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:30,754 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2021-11-02 23:05:30,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-02 23:05:30,755 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2021-11-02 23:05:30,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:05:30,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:30,755 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:30,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:30,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:30,967 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:30,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:30,967 INFO L85 PathProgramCache]: Analyzing trace with hash -401922094, now seen corresponding path program 121 times [2021-11-02 23:05:30,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:30,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171192388] [2021-11-02 23:05:30,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:30,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:31,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:31,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171192388] [2021-11-02 23:05:31,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171192388] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:31,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875612666] [2021-11-02 23:05:31,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:05:31,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:31,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:31,834 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:31,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-11-02 23:05:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:33,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:05:33,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:33,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875612666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:33,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:33,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15] total 38 [2021-11-02 23:05:33,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335931468] [2021-11-02 23:05:33,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-02 23:05:33,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:33,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-02 23:05:33,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:05:33,932 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 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) [2021-11-02 23:05:34,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:34,598 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2021-11-02 23:05:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:05:34,598 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 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 30 [2021-11-02 23:05:34,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:34,598 INFO L225 Difference]: With dead ends: 68 [2021-11-02 23:05:34,599 INFO L226 Difference]: Without dead ends: 64 [2021-11-02 23:05:34,599 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 23:05:34,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-02 23:05:34,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2021-11-02 23:05:34,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:34,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2021-11-02 23:05:34,725 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 30 [2021-11-02 23:05:34,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:34,725 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2021-11-02 23:05:34,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 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) [2021-11-02 23:05:34,726 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2021-11-02 23:05:34,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:05:34,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:34,726 INFO L513 BasicCegarLoop]: trace histogram [12, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:34,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-11-02 23:05:34,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:34,926 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:34,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:34,927 INFO L85 PathProgramCache]: Analyzing trace with hash 389870673, now seen corresponding path program 122 times [2021-11-02 23:05:34,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:34,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459338275] [2021-11-02 23:05:34,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:34,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:35,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:35,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459338275] [2021-11-02 23:05:35,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459338275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:35,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704451220] [2021-11-02 23:05:35,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:05:35,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:35,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:35,288 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:35,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-11-02 23:05:36,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:05:36,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:36,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:05:36,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:37,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704451220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:37,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:37,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-02 23:05:37,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219260234] [2021-11-02 23:05:37,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:05:37,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:37,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:05:37,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:05:37,162 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:05:38,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:38,162 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2021-11-02 23:05:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 23:05:38,162 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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 30 [2021-11-02 23:05:38,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:38,163 INFO L225 Difference]: With dead ends: 88 [2021-11-02 23:05:38,163 INFO L226 Difference]: Without dead ends: 84 [2021-11-02 23:05:38,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=2089, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 23:05:38,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-02 23:05:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2021-11-02 23:05:38,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:38,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2021-11-02 23:05:38,296 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 30 [2021-11-02 23:05:38,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:38,296 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2021-11-02 23:05:38,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:05:38,297 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2021-11-02 23:05:38,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:05:38,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:38,297 INFO L513 BasicCegarLoop]: trace histogram [13, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:38,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2021-11-02 23:05:38,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-11-02 23:05:38,511 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:38,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:38,512 INFO L85 PathProgramCache]: Analyzing trace with hash -831513614, now seen corresponding path program 123 times [2021-11-02 23:05:38,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:38,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077745492] [2021-11-02 23:05:38,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:38,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:38,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:38,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077745492] [2021-11-02 23:05:38,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077745492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:38,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434966366] [2021-11-02 23:05:38,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:05:38,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:38,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:38,867 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:38,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-11-02 23:05:40,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-02 23:05:40,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:40,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-02 23:05:40,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:41,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434966366] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:41,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:41,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-02 23:05:41,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551186497] [2021-11-02 23:05:41,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:05:41,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:41,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:05:41,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:05:41,192 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:05:42,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:42,327 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2021-11-02 23:05:42,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-02 23:05:42,327 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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 30 [2021-11-02 23:05:42,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:42,328 INFO L225 Difference]: With dead ends: 102 [2021-11-02 23:05:42,328 INFO L226 Difference]: Without dead ends: 98 [2021-11-02 23:05:42,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=2666, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:05:42,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-02 23:05:42,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 54. [2021-11-02 23:05:42,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:42,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2021-11-02 23:05:42,494 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 30 [2021-11-02 23:05:42,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:42,494 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2021-11-02 23:05:42,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:05:42,495 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2021-11-02 23:05:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:05:42,495 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:42,495 INFO L513 BasicCegarLoop]: trace histogram [14, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:42,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:42,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-11-02 23:05:42,696 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:42,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:42,696 INFO L85 PathProgramCache]: Analyzing trace with hash -732365775, now seen corresponding path program 124 times [2021-11-02 23:05:42,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:42,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126907716] [2021-11-02 23:05:42,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:42,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:43,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:43,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126907716] [2021-11-02 23:05:43,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126907716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:43,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732645728] [2021-11-02 23:05:43,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:05:43,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:43,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:43,086 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:43,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-11-02 23:05:44,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:05:44,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:44,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:05:44,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:44,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732645728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:44,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:44,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-02 23:05:44,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803174739] [2021-11-02 23:05:44,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:05:44,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:44,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:05:44,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:05:44,988 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:05:46,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:46,316 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2021-11-02 23:05:46,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-02 23:05:46,317 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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 30 [2021-11-02 23:05:46,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:46,317 INFO L225 Difference]: With dead ends: 115 [2021-11-02 23:05:46,317 INFO L226 Difference]: Without dead ends: 111 [2021-11-02 23:05:46,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=2982, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 23:05:46,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-02 23:05:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 54. [2021-11-02 23:05:46,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:46,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2021-11-02 23:05:46,452 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 30 [2021-11-02 23:05:46,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:46,453 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2021-11-02 23:05:46,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:05:46,453 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2021-11-02 23:05:46,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:05:46,454 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:46,454 INFO L513 BasicCegarLoop]: trace histogram [15, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:46,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:46,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-11-02 23:05:46,672 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:46,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:46,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1144809454, now seen corresponding path program 125 times [2021-11-02 23:05:46,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:46,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428115697] [2021-11-02 23:05:46,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:46,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:47,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:47,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428115697] [2021-11-02 23:05:47,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428115697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:47,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521741520] [2021-11-02 23:05:47,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:05:47,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:47,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:47,155 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:47,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-11-02 23:05:50,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-02 23:05:50,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:50,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:05:50,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:50,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521741520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:50,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:50,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-02 23:05:50,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415574915] [2021-11-02 23:05:50,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:05:50,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:50,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:05:50,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=643, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:05:50,592 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:05:52,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:52,089 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2021-11-02 23:05:52,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-02 23:05:52,090 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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 30 [2021-11-02 23:05:52,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:52,090 INFO L225 Difference]: With dead ends: 127 [2021-11-02 23:05:52,090 INFO L226 Difference]: Without dead ends: 123 [2021-11-02 23:05:52,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=2983, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 23:05:52,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-02 23:05:52,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 54. [2021-11-02 23:05:52,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:52,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2021-11-02 23:05:52,236 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 30 [2021-11-02 23:05:52,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:52,237 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2021-11-02 23:05:52,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:05:52,237 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2021-11-02 23:05:52,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:05:52,237 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:52,237 INFO L513 BasicCegarLoop]: trace histogram [16, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:52,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2021-11-02 23:05:52,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-11-02 23:05:52,438 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:52,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:52,438 INFO L85 PathProgramCache]: Analyzing trace with hash 781548561, now seen corresponding path program 126 times [2021-11-02 23:05:52,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:52,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775304462] [2021-11-02 23:05:52,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:52,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:52,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:52,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775304462] [2021-11-02 23:05:52,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775304462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:52,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357971538] [2021-11-02 23:05:52,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:05:52,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:52,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:52,846 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:52,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-11-02 23:05:55,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-02 23:05:55,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:55,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:05:55,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:55,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357971538] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:55,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:55,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-02 23:05:55,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811930142] [2021-11-02 23:05:55,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:05:55,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:55,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:05:55,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:05:55,584 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:05:57,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:57,061 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2021-11-02 23:05:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-02 23:05:57,062 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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 30 [2021-11-02 23:05:57,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:57,062 INFO L225 Difference]: With dead ends: 138 [2021-11-02 23:05:57,062 INFO L226 Difference]: Without dead ends: 134 [2021-11-02 23:05:57,063 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=2669, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:05:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-02 23:05:57,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 54. [2021-11-02 23:05:57,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:57,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2021-11-02 23:05:57,189 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 30 [2021-11-02 23:05:57,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:57,189 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2021-11-02 23:05:57,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:05:57,189 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2021-11-02 23:05:57,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:05:57,189 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:57,189 INFO L513 BasicCegarLoop]: trace histogram [17, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:57,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2021-11-02 23:05:57,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-11-02 23:05:57,390 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:57,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:57,390 INFO L85 PathProgramCache]: Analyzing trace with hash 705141810, now seen corresponding path program 127 times [2021-11-02 23:05:57,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:57,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061774719] [2021-11-02 23:05:57,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:57,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:57,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:57,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061774719] [2021-11-02 23:05:57,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061774719] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:57,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759347062] [2021-11-02 23:05:57,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:05:57,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:57,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:57,748 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:57,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-11-02 23:05:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:59,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:05:59,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:59,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759347062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:59,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:59,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-02 23:05:59,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061970332] [2021-11-02 23:05:59,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:05:59,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:59,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:05:59,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=645, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:05:59,687 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:06:01,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:01,100 INFO L93 Difference]: Finished difference Result 148 states and 160 transitions. [2021-11-02 23:06:01,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-02 23:06:01,101 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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 30 [2021-11-02 23:06:01,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:01,101 INFO L225 Difference]: With dead ends: 148 [2021-11-02 23:06:01,101 INFO L226 Difference]: Without dead ends: 144 [2021-11-02 23:06:01,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=2094, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 23:06:01,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-02 23:06:01,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 54. [2021-11-02 23:06:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:01,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2021-11-02 23:06:01,289 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 30 [2021-11-02 23:06:01,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:01,289 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2021-11-02 23:06:01,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:06:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2021-11-02 23:06:01,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:06:01,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:01,290 INFO L513 BasicCegarLoop]: trace histogram [18, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:01,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:01,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:01,493 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:01,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:01,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1672508401, now seen corresponding path program 128 times [2021-11-02 23:06:01,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:01,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442702119] [2021-11-02 23:06:01,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:01,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:01,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:01,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442702119] [2021-11-02 23:06:01,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442702119] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:01,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412089282] [2021-11-02 23:06:01,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:06:01,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:01,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:01,867 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:01,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-11-02 23:06:03,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:06:03,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:03,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:06:03,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:03,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412089282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:03,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:03,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-02 23:06:03,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665013129] [2021-11-02 23:06:03,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:06:03,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:03,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:06:03,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=646, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:06:03,897 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:06:05,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:05,298 INFO L93 Difference]: Finished difference Result 157 states and 169 transitions. [2021-11-02 23:06:05,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 23:06:05,298 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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 30 [2021-11-02 23:06:05,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:05,298 INFO L225 Difference]: With dead ends: 157 [2021-11-02 23:06:05,298 INFO L226 Difference]: Without dead ends: 153 [2021-11-02 23:06:05,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=1591, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 23:06:05,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-02 23:06:05,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 54. [2021-11-02 23:06:05,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:05,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2021-11-02 23:06:05,428 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 30 [2021-11-02 23:06:05,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:05,428 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2021-11-02 23:06:05,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:06:05,428 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2021-11-02 23:06:05,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:06:05,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:05,429 INFO L513 BasicCegarLoop]: trace histogram [19, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:05,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2021-11-02 23:06:05,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:05,629 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:05,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:05,629 INFO L85 PathProgramCache]: Analyzing trace with hash 733882450, now seen corresponding path program 129 times [2021-11-02 23:06:05,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:05,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383732704] [2021-11-02 23:06:05,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:05,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:05,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:05,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383732704] [2021-11-02 23:06:05,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383732704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:05,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717678313] [2021-11-02 23:06:05,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:06:05,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:05,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:05,990 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:05,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-11-02 23:06:09,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-02 23:06:09,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:09,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-02 23:06:09,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:09,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717678313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:09,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:09,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 33 [2021-11-02 23:06:09,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526900656] [2021-11-02 23:06:09,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 23:06:09,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:09,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 23:06:09,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=983, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:06:09,997 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 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) [2021-11-02 23:06:11,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:11,502 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2021-11-02 23:06:11,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 23:06:11,503 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 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 30 [2021-11-02 23:06:11,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:11,503 INFO L225 Difference]: With dead ends: 165 [2021-11-02 23:06:11,503 INFO L226 Difference]: Without dead ends: 161 [2021-11-02 23:06:11,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=1679, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 23:06:11,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-02 23:06:11,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 54. [2021-11-02 23:06:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:11,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2021-11-02 23:06:11,628 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 30 [2021-11-02 23:06:11,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:11,628 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2021-11-02 23:06:11,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 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) [2021-11-02 23:06:11,628 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2021-11-02 23:06:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:06:11,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:11,629 INFO L513 BasicCegarLoop]: trace histogram [20, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:11,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:11,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:11,829 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:11,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:11,829 INFO L85 PathProgramCache]: Analyzing trace with hash 149414865, now seen corresponding path program 130 times [2021-11-02 23:06:11,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:11,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203516485] [2021-11-02 23:06:11,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:11,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:12,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:12,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203516485] [2021-11-02 23:06:12,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203516485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:12,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389387378] [2021-11-02 23:06:12,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:06:12,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:12,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:12,193 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:12,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-11-02 23:06:14,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:06:14,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:14,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:06:14,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:14,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389387378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:14,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:14,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-02 23:06:14,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107981693] [2021-11-02 23:06:14,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:06:14,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:14,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:06:14,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=648, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:06:14,234 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:06:15,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:15,444 INFO L93 Difference]: Finished difference Result 172 states and 184 transitions. [2021-11-02 23:06:15,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:06:15,444 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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 30 [2021-11-02 23:06:15,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:15,445 INFO L225 Difference]: With dead ends: 172 [2021-11-02 23:06:15,445 INFO L226 Difference]: Without dead ends: 168 [2021-11-02 23:06:15,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:06:15,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-02 23:06:15,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 54. [2021-11-02 23:06:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:15,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2021-11-02 23:06:15,571 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 30 [2021-11-02 23:06:15,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:15,572 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2021-11-02 23:06:15,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:06:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2021-11-02 23:06:15,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:06:15,572 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:15,572 INFO L513 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:15,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2021-11-02 23:06:15,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:15,773 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:15,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:15,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1947648910, now seen corresponding path program 131 times [2021-11-02 23:06:15,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:15,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409400328] [2021-11-02 23:06:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:15,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:16,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:16,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409400328] [2021-11-02 23:06:16,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409400328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:16,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51969405] [2021-11-02 23:06:16,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:06:16,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:16,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:16,163 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:16,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-11-02 23:06:18,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-02 23:06:18,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:18,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:06:18,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:18,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51969405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:18,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:18,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-02 23:06:18,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2396077] [2021-11-02 23:06:18,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:06:18,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:18,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:06:18,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:06:18,666 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:06:19,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:19,988 INFO L93 Difference]: Finished difference Result 178 states and 190 transitions. [2021-11-02 23:06:19,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:06:19,989 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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 30 [2021-11-02 23:06:19,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:19,989 INFO L225 Difference]: With dead ends: 178 [2021-11-02 23:06:19,989 INFO L226 Difference]: Without dead ends: 174 [2021-11-02 23:06:19,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:06:19,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-02 23:06:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 54. [2021-11-02 23:06:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2021-11-02 23:06:20,132 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 30 [2021-11-02 23:06:20,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:20,132 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2021-11-02 23:06:20,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:06:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2021-11-02 23:06:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:06:20,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:20,133 INFO L513 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:20,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:20,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:20,334 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:20,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:20,334 INFO L85 PathProgramCache]: Analyzing trace with hash -352728143, now seen corresponding path program 22 times [2021-11-02 23:06:20,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:20,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812207528] [2021-11-02 23:06:20,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:20,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:20,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:20,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812207528] [2021-11-02 23:06:20,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812207528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:20,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011056364] [2021-11-02 23:06:20,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:06:20,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:20,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:20,727 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:20,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-11-02 23:06:22,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:06:22,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:22,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:06:22,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:22,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011056364] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:22,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:22,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-02 23:06:22,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097217279] [2021-11-02 23:06:22,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:06:22,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:22,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:06:22,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:06:22,776 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:06:23,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:23,964 INFO L93 Difference]: Finished difference Result 186 states and 199 transitions. [2021-11-02 23:06:23,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:06:23,965 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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 30 [2021-11-02 23:06:23,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:23,965 INFO L225 Difference]: With dead ends: 186 [2021-11-02 23:06:23,965 INFO L226 Difference]: Without dead ends: 182 [2021-11-02 23:06:23,966 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:06:23,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-02 23:06:24,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 56. [2021-11-02 23:06:24,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 55 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) [2021-11-02 23:06:24,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2021-11-02 23:06:24,097 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 30 [2021-11-02 23:06:24,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:24,097 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2021-11-02 23:06:24,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-02 23:06:24,097 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2021-11-02 23:06:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:06:24,098 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:24,098 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:24,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2021-11-02 23:06:24,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:24,303 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:24,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:24,304 INFO L85 PathProgramCache]: Analyzing trace with hash 426982358, now seen corresponding path program 132 times [2021-11-02 23:06:24,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:24,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837393266] [2021-11-02 23:06:24,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:24,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:24,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:24,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837393266] [2021-11-02 23:06:24,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837393266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:24,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953395326] [2021-11-02 23:06:24,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:06:24,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:24,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:24,664 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:24,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-11-02 23:06:26,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 23:06:26,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:26,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 23:06:26,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:27,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953395326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:27,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:27,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 27 [2021-11-02 23:06:27,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524694430] [2021-11-02 23:06:27,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:06:27,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:27,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:06:27,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:06:27,035 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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) [2021-11-02 23:06:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:27,787 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2021-11-02 23:06:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:06:27,788 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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) Word has length 31 [2021-11-02 23:06:27,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:27,788 INFO L225 Difference]: With dead ends: 72 [2021-11-02 23:06:27,788 INFO L226 Difference]: Without dead ends: 54 [2021-11-02 23:06:27,788 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 23:06:27,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-02 23:06:27,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-02 23:06:27,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:27,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2021-11-02 23:06:27,909 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 31 [2021-11-02 23:06:27,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:27,909 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2021-11-02 23:06:27,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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) [2021-11-02 23:06:27,909 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2021-11-02 23:06:27,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:06:27,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:27,910 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:27,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:28,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-11-02 23:06:28,110 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:28,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:28,110 INFO L85 PathProgramCache]: Analyzing trace with hash -797245641, now seen corresponding path program 133 times [2021-11-02 23:06:28,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:28,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412339404] [2021-11-02 23:06:28,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:28,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:28,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:28,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412339404] [2021-11-02 23:06:28,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412339404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:28,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810346304] [2021-11-02 23:06:28,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:06:28,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:28,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:28,495 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:28,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-11-02 23:06:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:30,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 23:06:30,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:30,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810346304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:30,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:30,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-02 23:06:30,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378049863] [2021-11-02 23:06:30,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:06:30,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:30,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:06:30,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:06:30,616 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:06:31,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:31,366 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2021-11-02 23:06:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:06:31,367 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) Word has length 31 [2021-11-02 23:06:31,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:31,367 INFO L225 Difference]: With dead ends: 74 [2021-11-02 23:06:31,367 INFO L226 Difference]: Without dead ends: 70 [2021-11-02 23:06:31,367 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=1435, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:06:31,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-02 23:06:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 55. [2021-11-02 23:06:31,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 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) [2021-11-02 23:06:31,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-11-02 23:06:31,507 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 31 [2021-11-02 23:06:31,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:31,507 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-11-02 23:06:31,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:06:31,507 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-11-02 23:06:31,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:06:31,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:31,507 INFO L513 BasicCegarLoop]: trace histogram [13, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:31,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2021-11-02 23:06:31,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-11-02 23:06:31,708 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:31,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:31,708 INFO L85 PathProgramCache]: Analyzing trace with hash -5452874, now seen corresponding path program 134 times [2021-11-02 23:06:31,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:31,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242390710] [2021-11-02 23:06:31,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:31,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:32,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:32,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242390710] [2021-11-02 23:06:32,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242390710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:32,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990093559] [2021-11-02 23:06:32,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:06:32,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:32,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:32,190 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:32,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-11-02 23:06:34,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:06:34,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:34,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 23:06:34,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:34,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990093559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:34,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:34,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-02 23:06:34,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221202989] [2021-11-02 23:06:34,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:06:34,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:34,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:06:34,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:06:34,320 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:06:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:35,318 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2021-11-02 23:06:35,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 23:06:35,318 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) Word has length 31 [2021-11-02 23:06:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:35,319 INFO L225 Difference]: With dead ends: 89 [2021-11-02 23:06:35,319 INFO L226 Difference]: Without dead ends: 85 [2021-11-02 23:06:35,319 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=2183, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:06:35,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-02 23:06:35,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 55. [2021-11-02 23:06:35,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 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) [2021-11-02 23:06:35,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-11-02 23:06:35,470 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 31 [2021-11-02 23:06:35,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:35,470 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-11-02 23:06:35,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:06:35,470 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-11-02 23:06:35,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:06:35,470 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:35,470 INFO L513 BasicCegarLoop]: trace histogram [14, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:35,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2021-11-02 23:06:35,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:35,671 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:35,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:35,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1226837161, now seen corresponding path program 135 times [2021-11-02 23:06:35,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:35,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137489149] [2021-11-02 23:06:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:35,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:36,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:36,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137489149] [2021-11-02 23:06:36,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137489149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:36,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737009047] [2021-11-02 23:06:36,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:06:36,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:36,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:36,054 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:36,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-11-02 23:06:38,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-02 23:06:38,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:38,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-02 23:06:38,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:38,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737009047] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:38,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:38,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-02 23:06:38,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639928526] [2021-11-02 23:06:38,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:06:38,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:38,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:06:38,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:06:38,984 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:06:40,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:40,267 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2021-11-02 23:06:40,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 23:06:40,268 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) Word has length 31 [2021-11-02 23:06:40,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:40,268 INFO L225 Difference]: With dead ends: 103 [2021-11-02 23:06:40,268 INFO L226 Difference]: Without dead ends: 99 [2021-11-02 23:06:40,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=2772, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 23:06:40,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-02 23:06:40,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 55. [2021-11-02 23:06:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 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) [2021-11-02 23:06:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-11-02 23:06:40,450 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 31 [2021-11-02 23:06:40,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:40,451 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-11-02 23:06:40,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:06:40,451 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-11-02 23:06:40,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:06:40,451 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:40,451 INFO L513 BasicCegarLoop]: trace histogram [15, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:40,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:40,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-11-02 23:06:40,652 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:40,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:40,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1127689322, now seen corresponding path program 136 times [2021-11-02 23:06:40,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:40,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249888083] [2021-11-02 23:06:40,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:40,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:41,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:41,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249888083] [2021-11-02 23:06:41,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249888083] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:41,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854656765] [2021-11-02 23:06:41,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:06:41,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:41,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:41,041 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:41,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-11-02 23:06:43,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:06:43,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:43,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 23:06:43,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:43,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854656765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:43,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:43,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-02 23:06:43,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718332746] [2021-11-02 23:06:43,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:06:43,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:43,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:06:43,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=694, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:06:43,213 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:06:44,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:44,734 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2021-11-02 23:06:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-02 23:06:44,735 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) Word has length 31 [2021-11-02 23:06:44,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:44,735 INFO L225 Difference]: With dead ends: 116 [2021-11-02 23:06:44,735 INFO L226 Difference]: Without dead ends: 112 [2021-11-02 23:06:44,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=212, Invalid=3094, Unknown=0, NotChecked=0, Total=3306 [2021-11-02 23:06:44,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-02 23:06:44,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 55. [2021-11-02 23:06:44,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 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) [2021-11-02 23:06:44,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-11-02 23:06:44,899 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 31 [2021-11-02 23:06:44,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:44,899 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-11-02 23:06:44,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:06:44,899 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-11-02 23:06:44,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:06:44,899 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:44,899 INFO L513 BasicCegarLoop]: trace histogram [16, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:44,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2021-11-02 23:06:45,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,159 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:45,100 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:45,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:45,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1540133001, now seen corresponding path program 137 times [2021-11-02 23:06:45,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:45,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705109560] [2021-11-02 23:06:45,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:45,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:45,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:45,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705109560] [2021-11-02 23:06:45,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705109560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:45,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031908901] [2021-11-02 23:06:45,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:06:45,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:45,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:45,528 INFO L229 MonitoredProcess]: Starting monitored process 160 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:45,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-11-02 23:06:48,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-02 23:06:48,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:48,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 23:06:48,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:48,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031908901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:48,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:48,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-02 23:06:48,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829051733] [2021-11-02 23:06:48,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:06:48,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:48,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:06:48,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=695, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:06:48,877 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:06:50,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:50,554 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2021-11-02 23:06:50,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-02 23:06:50,554 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) Word has length 31 [2021-11-02 23:06:50,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:50,555 INFO L225 Difference]: With dead ends: 128 [2021-11-02 23:06:50,555 INFO L226 Difference]: Without dead ends: 124 [2021-11-02 23:06:50,555 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=211, Invalid=3095, Unknown=0, NotChecked=0, Total=3306 [2021-11-02 23:06:50,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-02 23:06:50,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 55. [2021-11-02 23:06:50,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 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) [2021-11-02 23:06:50,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-11-02 23:06:50,725 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 31 [2021-11-02 23:06:50,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:50,726 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-11-02 23:06:50,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:06:50,726 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-11-02 23:06:50,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:06:50,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:50,726 INFO L513 BasicCegarLoop]: trace histogram [17, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:50,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2021-11-02 23:06:50,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-11-02 23:06:50,927 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:50,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:50,927 INFO L85 PathProgramCache]: Analyzing trace with hash 386225014, now seen corresponding path program 138 times [2021-11-02 23:06:50,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:50,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278187089] [2021-11-02 23:06:50,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:50,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:51,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:51,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278187089] [2021-11-02 23:06:51,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278187089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:51,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374374873] [2021-11-02 23:06:51,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:06:51,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:51,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:51,318 INFO L229 MonitoredProcess]: Starting monitored process 161 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:51,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-11-02 23:06:54,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-02 23:06:54,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:54,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 23:06:54,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:54,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374374873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:54,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:54,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-02 23:06:54,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372982649] [2021-11-02 23:06:54,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:06:54,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:54,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:06:54,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:06:54,623 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:06:56,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:56,288 INFO L93 Difference]: Finished difference Result 139 states and 151 transitions. [2021-11-02 23:06:56,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-02 23:06:56,289 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) Word has length 31 [2021-11-02 23:06:56,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:56,289 INFO L225 Difference]: With dead ends: 139 [2021-11-02 23:06:56,289 INFO L226 Difference]: Without dead ends: 135 [2021-11-02 23:06:56,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=2775, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 23:06:56,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-02 23:06:56,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 55. [2021-11-02 23:06:56,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 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) [2021-11-02 23:06:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-11-02 23:06:56,435 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 31 [2021-11-02 23:06:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:56,435 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-11-02 23:06:56,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:06:56,435 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-11-02 23:06:56,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:06:56,435 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:56,435 INFO L513 BasicCegarLoop]: trace histogram [18, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:56,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:56,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-11-02 23:06:56,636 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:56,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:56,636 INFO L85 PathProgramCache]: Analyzing trace with hash 309818263, now seen corresponding path program 139 times [2021-11-02 23:06:56,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:56,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495601925] [2021-11-02 23:06:56,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:56,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:57,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:57,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495601925] [2021-11-02 23:06:57,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495601925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:57,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696234207] [2021-11-02 23:06:57,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:06:57,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:57,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:57,073 INFO L229 MonitoredProcess]: Starting monitored process 162 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:57,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-11-02 23:06:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:59,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 23:06:59,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:59,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696234207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:59,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:59,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-02 23:06:59,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480131821] [2021-11-02 23:06:59,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:06:59,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:59,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:06:59,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=697, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:06:59,283 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:07:00,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:00,771 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2021-11-02 23:07:00,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 23:07:00,772 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) Word has length 31 [2021-11-02 23:07:00,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:00,772 INFO L225 Difference]: With dead ends: 149 [2021-11-02 23:07:00,772 INFO L226 Difference]: Without dead ends: 145 [2021-11-02 23:07:00,773 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=2188, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:07:00,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-02 23:07:00,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 55. [2021-11-02 23:07:00,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 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) [2021-11-02 23:07:00,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-11-02 23:07:00,927 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 31 [2021-11-02 23:07:00,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:00,927 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-11-02 23:07:00,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:07:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-11-02 23:07:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:07:00,927 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:00,928 INFO L513 BasicCegarLoop]: trace histogram [19, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:00,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:01,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:01,128 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:01,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:01,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1277184854, now seen corresponding path program 140 times [2021-11-02 23:07:01,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:01,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956542825] [2021-11-02 23:07:01,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:01,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:01,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:01,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956542825] [2021-11-02 23:07:01,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956542825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:01,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264097876] [2021-11-02 23:07:01,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:07:01,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:01,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:01,523 INFO L229 MonitoredProcess]: Starting monitored process 163 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:01,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-11-02 23:07:03,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:07:03,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:03,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 23:07:03,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:03,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264097876] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:03,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:03,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-02 23:07:03,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323440506] [2021-11-02 23:07:03,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:07:03,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:03,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:07:03,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:07:03,737 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:07:05,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:05,252 INFO L93 Difference]: Finished difference Result 158 states and 170 transitions. [2021-11-02 23:07:05,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 23:07:05,252 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) Word has length 31 [2021-11-02 23:07:05,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:05,252 INFO L225 Difference]: With dead ends: 158 [2021-11-02 23:07:05,252 INFO L226 Difference]: Without dead ends: 154 [2021-11-02 23:07:05,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=1673, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 23:07:05,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-02 23:07:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 55. [2021-11-02 23:07:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 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) [2021-11-02 23:07:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-11-02 23:07:05,420 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 31 [2021-11-02 23:07:05,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:05,421 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-11-02 23:07:05,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:07:05,421 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-11-02 23:07:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:07:05,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:05,421 INFO L513 BasicCegarLoop]: trace histogram [20, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:05,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:05,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:05,622 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:05,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:05,622 INFO L85 PathProgramCache]: Analyzing trace with hash 338558903, now seen corresponding path program 141 times [2021-11-02 23:07:05,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:05,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999429727] [2021-11-02 23:07:05,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:05,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:06,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:06,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999429727] [2021-11-02 23:07:06,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999429727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:06,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352506627] [2021-11-02 23:07:06,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:07:06,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:06,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:06,007 INFO L229 MonitoredProcess]: Starting monitored process 164 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:06,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-11-02 23:07:08,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-02 23:07:08,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:08,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-02 23:07:08,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:08,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352506627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:08,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:08,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-02 23:07:08,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452253763] [2021-11-02 23:07:08,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:07:08,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:08,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:07:08,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:07:08,718 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:07:10,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:10,186 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2021-11-02 23:07:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 23:07:10,186 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) Word has length 31 [2021-11-02 23:07:10,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:10,187 INFO L225 Difference]: With dead ends: 166 [2021-11-02 23:07:10,187 INFO L226 Difference]: Without dead ends: 162 [2021-11-02 23:07:10,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:07:10,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-02 23:07:10,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 55. [2021-11-02 23:07:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 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) [2021-11-02 23:07:10,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-11-02 23:07:10,339 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 31 [2021-11-02 23:07:10,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:10,339 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-11-02 23:07:10,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:07:10,339 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-11-02 23:07:10,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:07:10,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:10,340 INFO L513 BasicCegarLoop]: trace histogram [21, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:10,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:10,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,164 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:10,540 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:10,540 INFO L85 PathProgramCache]: Analyzing trace with hash -245908682, now seen corresponding path program 142 times [2021-11-02 23:07:10,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:10,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134628544] [2021-11-02 23:07:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:10,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:10,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:10,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134628544] [2021-11-02 23:07:10,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134628544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:10,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563911708] [2021-11-02 23:07:10,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:07:10,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:10,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:10,926 INFO L229 MonitoredProcess]: Starting monitored process 165 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:10,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-11-02 23:07:13,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:07:13,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:13,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 23:07:13,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:13,166 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:13,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563911708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:13,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:13,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-02 23:07:13,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330993239] [2021-11-02 23:07:13,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:07:13,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:13,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:07:13,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=700, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:07:13,167 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:07:14,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:14,474 INFO L93 Difference]: Finished difference Result 173 states and 185 transitions. [2021-11-02 23:07:14,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:07:14,474 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) Word has length 31 [2021-11-02 23:07:14,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:14,474 INFO L225 Difference]: With dead ends: 173 [2021-11-02 23:07:14,475 INFO L226 Difference]: Without dead ends: 169 [2021-11-02 23:07:14,475 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=1036, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:07:14,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-02 23:07:14,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 55. [2021-11-02 23:07:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 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) [2021-11-02 23:07:14,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-11-02 23:07:14,628 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 31 [2021-11-02 23:07:14,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:14,628 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-11-02 23:07:14,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:07:14,628 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-11-02 23:07:14,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:07:14,629 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:14,629 INFO L513 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:14,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2021-11-02 23:07:14,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,165 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:14,829 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:14,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1951994839, now seen corresponding path program 143 times [2021-11-02 23:07:14,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:14,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426304479] [2021-11-02 23:07:14,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:14,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:15,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:15,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426304479] [2021-11-02 23:07:15,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426304479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:15,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359328977] [2021-11-02 23:07:15,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:07:15,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:15,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:15,223 INFO L229 MonitoredProcess]: Starting monitored process 166 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:15,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-11-02 23:07:19,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-02 23:07:19,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:19,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 23:07:19,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:19,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359328977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:19,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:19,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-02 23:07:19,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519499707] [2021-11-02 23:07:19,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:07:19,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:19,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:07:19,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:07:19,506 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:07:20,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:20,931 INFO L93 Difference]: Finished difference Result 179 states and 191 transitions. [2021-11-02 23:07:20,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:07:20,932 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) Word has length 31 [2021-11-02 23:07:20,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:20,932 INFO L225 Difference]: With dead ends: 179 [2021-11-02 23:07:20,932 INFO L226 Difference]: Without dead ends: 175 [2021-11-02 23:07:20,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:07:20,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-02 23:07:21,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 55. [2021-11-02 23:07:21,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 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) [2021-11-02 23:07:21,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-11-02 23:07:21,100 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 31 [2021-11-02 23:07:21,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:21,100 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-11-02 23:07:21,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:07:21,101 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-11-02 23:07:21,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:07:21,101 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:21,101 INFO L513 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:21,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:21,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,166 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:21,302 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:21,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:21,302 INFO L85 PathProgramCache]: Analyzing trace with hash -748051690, now seen corresponding path program 23 times [2021-11-02 23:07:21,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:21,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295631485] [2021-11-02 23:07:21,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:21,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:21,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:21,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295631485] [2021-11-02 23:07:21,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295631485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:21,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971241329] [2021-11-02 23:07:21,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:07:21,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:21,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:21,697 INFO L229 MonitoredProcess]: Starting monitored process 167 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:21,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-11-02 23:07:24,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-02 23:07:24,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:24,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 23:07:24,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:24,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971241329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:24,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:24,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-02 23:07:24,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607358195] [2021-11-02 23:07:24,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:07:24,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:24,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:07:24,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:07:24,945 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:07:26,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:26,198 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2021-11-02 23:07:26,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:07:26,199 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) Word has length 31 [2021-11-02 23:07:26,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:26,199 INFO L225 Difference]: With dead ends: 187 [2021-11-02 23:07:26,200 INFO L226 Difference]: Without dead ends: 183 [2021-11-02 23:07:26,200 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:07:26,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-02 23:07:26,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 57. [2021-11-02 23:07:26,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.25) internal successors, (70), 56 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) [2021-11-02 23:07:26,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2021-11-02 23:07:26,384 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 31 [2021-11-02 23:07:26,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:26,384 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2021-11-02 23:07:26,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-11-02 23:07:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2021-11-02 23:07:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:07:26,384 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:26,384 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:26,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:26,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-11-02 23:07:26,585 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:26,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:26,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1056854289, now seen corresponding path program 144 times [2021-11-02 23:07:26,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:26,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298803766] [2021-11-02 23:07:26,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:26,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:30,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:30,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298803766] [2021-11-02 23:07:30,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298803766] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:30,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518509778] [2021-11-02 23:07:30,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:07:30,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:30,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:30,107 INFO L229 MonitoredProcess]: Starting monitored process 168 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:30,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-11-02 23:07:32,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 23:07:32,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:32,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 23:07:32,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:33,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518509778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:33,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:33,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 16] total 41 [2021-11-02 23:07:33,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98512596] [2021-11-02 23:07:33,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-02 23:07:33,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:33,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-02 23:07:33,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1524, Unknown=1, NotChecked=0, Total=1640 [2021-11-02 23:07:33,791 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 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) [2021-11-02 23:07:34,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:34,805 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2021-11-02 23:07:34,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:07:34,806 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 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 32 [2021-11-02 23:07:34,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:34,806 INFO L225 Difference]: With dead ends: 73 [2021-11-02 23:07:34,806 INFO L226 Difference]: Without dead ends: 69 [2021-11-02 23:07:34,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=121, Invalid=1600, Unknown=1, NotChecked=0, Total=1722 [2021-11-02 23:07:34,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-02 23:07:34,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-11-02 23:07:34,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:35,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2021-11-02 23:07:35,000 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2021-11-02 23:07:35,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:35,000 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2021-11-02 23:07:35,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 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) [2021-11-02 23:07:35,000 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2021-11-02 23:07:35,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:07:35,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:35,001 INFO L513 BasicCegarLoop]: trace histogram [13, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:35,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2021-11-02 23:07:35,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-11-02 23:07:35,215 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:35,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:35,215 INFO L85 PathProgramCache]: Analyzing trace with hash -167373710, now seen corresponding path program 145 times [2021-11-02 23:07:35,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:35,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817624039] [2021-11-02 23:07:35,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:35,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:35,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:35,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817624039] [2021-11-02 23:07:35,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817624039] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:35,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083365019] [2021-11-02 23:07:35,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:07:35,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:35,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:35,631 INFO L229 MonitoredProcess]: Starting monitored process 169 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:35,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-11-02 23:07:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:37,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 23:07:37,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:38,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083365019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:38,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:38,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-02 23:07:38,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374989423] [2021-11-02 23:07:38,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:07:38,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:38,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:07:38,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:07:38,001 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:39,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:39,201 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2021-11-02 23:07:39,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 23:07:39,201 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:07:39,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:39,201 INFO L225 Difference]: With dead ends: 94 [2021-11-02 23:07:39,202 INFO L226 Difference]: Without dead ends: 90 [2021-11-02 23:07:39,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=182, Invalid=2470, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 23:07:39,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-02 23:07:39,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2021-11-02 23:07:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:39,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2021-11-02 23:07:39,428 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2021-11-02 23:07:39,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:39,429 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2021-11-02 23:07:39,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:39,429 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2021-11-02 23:07:39,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:07:39,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:39,429 INFO L513 BasicCegarLoop]: trace histogram [14, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:39,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2021-11-02 23:07:39,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-11-02 23:07:39,630 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:39,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:39,630 INFO L85 PathProgramCache]: Analyzing trace with hash 624419057, now seen corresponding path program 146 times [2021-11-02 23:07:39,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:39,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567701326] [2021-11-02 23:07:39,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:39,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:40,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:40,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567701326] [2021-11-02 23:07:40,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567701326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:40,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465692544] [2021-11-02 23:07:40,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:07:40,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:40,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:40,079 INFO L229 MonitoredProcess]: Starting monitored process 170 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:40,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-11-02 23:07:42,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:07:42,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:42,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 23:07:42,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:42,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465692544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:42,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:42,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-02 23:07:42,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591493993] [2021-11-02 23:07:42,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:07:42,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:42,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:07:42,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:07:42,438 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:44,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:44,125 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2021-11-02 23:07:44,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-02 23:07:44,125 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:07:44,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:44,126 INFO L225 Difference]: With dead ends: 109 [2021-11-02 23:07:44,126 INFO L226 Difference]: Without dead ends: 105 [2021-11-02 23:07:44,126 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=216, Invalid=3206, Unknown=0, NotChecked=0, Total=3422 [2021-11-02 23:07:44,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-02 23:07:44,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 58. [2021-11-02 23:07:44,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2021-11-02 23:07:44,307 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2021-11-02 23:07:44,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:44,307 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2021-11-02 23:07:44,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:44,307 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2021-11-02 23:07:44,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:07:44,307 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:44,307 INFO L513 BasicCegarLoop]: trace histogram [15, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:44,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2021-11-02 23:07:44,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:44,508 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:44,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:44,508 INFO L85 PathProgramCache]: Analyzing trace with hash -596965230, now seen corresponding path program 147 times [2021-11-02 23:07:44,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:44,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934703349] [2021-11-02 23:07:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:44,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:44,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:44,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934703349] [2021-11-02 23:07:44,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934703349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:44,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052778233] [2021-11-02 23:07:44,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:07:44,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:44,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:44,956 INFO L229 MonitoredProcess]: Starting monitored process 171 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:44,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-11-02 23:07:47,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-02 23:07:47,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:47,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 23:07:47,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:47,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052778233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:47,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:47,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-02 23:07:47,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007392544] [2021-11-02 23:07:47,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:07:47,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:47,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:07:47,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=747, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:07:47,902 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:49,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:49,756 INFO L93 Difference]: Finished difference Result 123 states and 136 transitions. [2021-11-02 23:07:49,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-02 23:07:49,756 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:07:49,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:49,757 INFO L225 Difference]: With dead ends: 123 [2021-11-02 23:07:49,757 INFO L226 Difference]: Without dead ends: 119 [2021-11-02 23:07:49,757 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=235, Invalid=3671, Unknown=0, NotChecked=0, Total=3906 [2021-11-02 23:07:49,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-02 23:07:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 58. [2021-11-02 23:07:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:49,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2021-11-02 23:07:49,977 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2021-11-02 23:07:49,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:49,977 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2021-11-02 23:07:49,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:49,978 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2021-11-02 23:07:49,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:07:49,978 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:49,978 INFO L513 BasicCegarLoop]: trace histogram [16, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:49,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2021-11-02 23:07:50,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,171 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:50,178 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:50,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:50,179 INFO L85 PathProgramCache]: Analyzing trace with hash -497817391, now seen corresponding path program 148 times [2021-11-02 23:07:50,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:50,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098054983] [2021-11-02 23:07:50,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:50,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:50,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:50,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098054983] [2021-11-02 23:07:50,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098054983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:50,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669568296] [2021-11-02 23:07:50,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:07:50,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:50,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:50,597 INFO L229 MonitoredProcess]: Starting monitored process 172 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:50,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-11-02 23:07:52,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:07:52,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:52,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 23:07:52,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:52,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669568296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:52,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:52,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-02 23:07:52,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80250806] [2021-11-02 23:07:52,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:07:52,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:52,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:07:52,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=748, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:07:52,963 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:55,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:55,012 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2021-11-02 23:07:55,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-02 23:07:55,013 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:07:55,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:55,013 INFO L225 Difference]: With dead ends: 136 [2021-11-02 23:07:55,013 INFO L226 Difference]: Without dead ends: 132 [2021-11-02 23:07:55,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=239, Invalid=3793, Unknown=0, NotChecked=0, Total=4032 [2021-11-02 23:07:55,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-02 23:07:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 58. [2021-11-02 23:07:55,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2021-11-02 23:07:55,202 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2021-11-02 23:07:55,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:55,202 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2021-11-02 23:07:55,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:55,202 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2021-11-02 23:07:55,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:07:55,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:55,202 INFO L513 BasicCegarLoop]: trace histogram [17, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:55,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2021-11-02 23:07:55,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,172 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:55,403 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:55,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:55,403 INFO L85 PathProgramCache]: Analyzing trace with hash -910261070, now seen corresponding path program 149 times [2021-11-02 23:07:55,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:55,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940288097] [2021-11-02 23:07:55,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:55,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:55,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:55,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940288097] [2021-11-02 23:07:55,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940288097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:55,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846461726] [2021-11-02 23:07:55,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:07:55,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:55,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:55,841 INFO L229 MonitoredProcess]: Starting monitored process 173 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:55,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-11-02 23:08:02,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-02 23:08:02,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:02,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 23:08:02,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:02,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846461726] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:02,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:02,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-02 23:08:02,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305634128] [2021-11-02 23:08:02,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:08:02,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:02,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:08:02,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=749, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:08:02,769 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:04,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:04,855 INFO L93 Difference]: Finished difference Result 148 states and 161 transitions. [2021-11-02 23:08:04,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-02 23:08:04,856 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:08:04,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:04,856 INFO L225 Difference]: With dead ends: 148 [2021-11-02 23:08:04,856 INFO L226 Difference]: Without dead ends: 144 [2021-11-02 23:08:04,857 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=228, Invalid=3554, Unknown=0, NotChecked=0, Total=3782 [2021-11-02 23:08:04,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-02 23:08:05,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 58. [2021-11-02 23:08:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:05,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2021-11-02 23:08:05,047 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2021-11-02 23:08:05,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:05,047 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2021-11-02 23:08:05,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:05,047 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2021-11-02 23:08:05,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:08:05,047 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:05,047 INFO L513 BasicCegarLoop]: trace histogram [18, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:05,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2021-11-02 23:08:05,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:05,251 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:05,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:05,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1016096945, now seen corresponding path program 150 times [2021-11-02 23:08:05,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:05,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630974443] [2021-11-02 23:08:05,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:05,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:05,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:05,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630974443] [2021-11-02 23:08:05,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630974443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:05,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17730572] [2021-11-02 23:08:05,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:08:05,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:05,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:05,666 INFO L229 MonitoredProcess]: Starting monitored process 174 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:05,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-11-02 23:08:08,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-02 23:08:08,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:08,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 23:08:08,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:08,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17730572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:08,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:08,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-02 23:08:08,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761301972] [2021-11-02 23:08:08,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:08:08,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:08,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:08:08,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=750, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:08:08,858 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:10,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:10,942 INFO L93 Difference]: Finished difference Result 159 states and 172 transitions. [2021-11-02 23:08:10,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-02 23:08:10,943 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:08:10,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:10,943 INFO L225 Difference]: With dead ends: 159 [2021-11-02 23:08:10,943 INFO L226 Difference]: Without dead ends: 155 [2021-11-02 23:08:10,944 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=202, Invalid=2990, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 23:08:10,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-02 23:08:11,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 58. [2021-11-02 23:08:11,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:11,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2021-11-02 23:08:11,149 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2021-11-02 23:08:11,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:11,150 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2021-11-02 23:08:11,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:11,150 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2021-11-02 23:08:11,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:08:11,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:11,150 INFO L513 BasicCegarLoop]: trace histogram [19, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:11,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2021-11-02 23:08:11,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:11,351 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:11,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:11,351 INFO L85 PathProgramCache]: Analyzing trace with hash 939690194, now seen corresponding path program 151 times [2021-11-02 23:08:11,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:11,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350315663] [2021-11-02 23:08:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:11,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:11,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:11,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350315663] [2021-11-02 23:08:11,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350315663] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:11,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096335821] [2021-11-02 23:08:11,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:08:11,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:11,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:11,814 INFO L229 MonitoredProcess]: Starting monitored process 175 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:11,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-11-02 23:08:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:14,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 23:08:14,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:14,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096335821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:14,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:14,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-02 23:08:14,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303315081] [2021-11-02 23:08:14,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:08:14,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:14,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:08:14,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=751, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:08:14,282 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:16,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:16,253 INFO L93 Difference]: Finished difference Result 169 states and 182 transitions. [2021-11-02 23:08:16,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-02 23:08:16,253 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:08:16,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:16,254 INFO L225 Difference]: With dead ends: 169 [2021-11-02 23:08:16,254 INFO L226 Difference]: Without dead ends: 165 [2021-11-02 23:08:16,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 23:08:16,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-02 23:08:16,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 58. [2021-11-02 23:08:16,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:16,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2021-11-02 23:08:16,453 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2021-11-02 23:08:16,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:16,453 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2021-11-02 23:08:16,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:16,453 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2021-11-02 23:08:16,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:08:16,453 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:16,453 INFO L513 BasicCegarLoop]: trace histogram [20, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:16,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:16,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,175 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:16,654 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:16,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:16,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1907056785, now seen corresponding path program 152 times [2021-11-02 23:08:16,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:16,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749745747] [2021-11-02 23:08:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:16,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:17,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:17,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749745747] [2021-11-02 23:08:17,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749745747] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:17,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594157168] [2021-11-02 23:08:17,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:08:17,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:17,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:17,193 INFO L229 MonitoredProcess]: Starting monitored process 176 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:17,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-11-02 23:08:19,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:08:19,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:19,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 23:08:19,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:19,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594157168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:19,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:19,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-02 23:08:19,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640358647] [2021-11-02 23:08:19,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:08:19,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:19,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:08:19,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=752, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:08:19,650 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:21,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:21,414 INFO L93 Difference]: Finished difference Result 178 states and 191 transitions. [2021-11-02 23:08:21,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 23:08:21,414 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:08:21,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:21,415 INFO L225 Difference]: With dead ends: 178 [2021-11-02 23:08:21,415 INFO L226 Difference]: Without dead ends: 174 [2021-11-02 23:08:21,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=1757, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:08:21,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-02 23:08:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 58. [2021-11-02 23:08:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:21,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2021-11-02 23:08:21,607 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2021-11-02 23:08:21,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:21,608 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2021-11-02 23:08:21,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:21,608 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2021-11-02 23:08:21,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:08:21,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:21,609 INFO L513 BasicCegarLoop]: trace histogram [21, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:21,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:21,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,176 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:21,825 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:21,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:21,826 INFO L85 PathProgramCache]: Analyzing trace with hash 968430834, now seen corresponding path program 153 times [2021-11-02 23:08:21,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:21,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799290498] [2021-11-02 23:08:21,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:21,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:22,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:22,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799290498] [2021-11-02 23:08:22,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799290498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:22,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756028597] [2021-11-02 23:08:22,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:08:22,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:22,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:22,270 INFO L229 MonitoredProcess]: Starting monitored process 177 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:22,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2021-11-02 23:08:25,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-02 23:08:25,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:25,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 23:08:25,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:25,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756028597] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:25,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:25,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-02 23:08:25,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001395751] [2021-11-02 23:08:25,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:08:25,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:25,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:08:25,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:08:25,643 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:27,458 INFO L93 Difference]: Finished difference Result 186 states and 199 transitions. [2021-11-02 23:08:27,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 23:08:27,459 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:08:27,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:27,459 INFO L225 Difference]: With dead ends: 186 [2021-11-02 23:08:27,459 INFO L226 Difference]: Without dead ends: 182 [2021-11-02 23:08:27,459 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 23:08:27,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-02 23:08:27,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 58. [2021-11-02 23:08:27,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2021-11-02 23:08:27,682 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2021-11-02 23:08:27,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:27,682 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2021-11-02 23:08:27,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:27,682 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2021-11-02 23:08:27,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:08:27,682 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:27,683 INFO L513 BasicCegarLoop]: trace histogram [22, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:27,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:27,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-11-02 23:08:27,887 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:27,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:27,888 INFO L85 PathProgramCache]: Analyzing trace with hash 383963249, now seen corresponding path program 154 times [2021-11-02 23:08:27,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:27,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250561056] [2021-11-02 23:08:27,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:27,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:28,339 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:28,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:28,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250561056] [2021-11-02 23:08:28,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250561056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:28,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346801947] [2021-11-02 23:08:28,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:08:28,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:28,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:28,340 INFO L229 MonitoredProcess]: Starting monitored process 178 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:28,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2021-11-02 23:08:30,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:08:30,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:30,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 23:08:30,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:30,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346801947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:30,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:30,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-02 23:08:30,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472857302] [2021-11-02 23:08:30,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:08:30,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:30,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:08:30,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=754, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:08:30,989 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:32,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:32,717 INFO L93 Difference]: Finished difference Result 193 states and 206 transitions. [2021-11-02 23:08:32,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:08:32,718 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:08:32,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:32,718 INFO L225 Difference]: With dead ends: 193 [2021-11-02 23:08:32,718 INFO L226 Difference]: Without dead ends: 189 [2021-11-02 23:08:32,718 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=1102, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 23:08:32,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-02 23:08:32,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 58. [2021-11-02 23:08:32,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2021-11-02 23:08:32,907 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2021-11-02 23:08:32,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:32,907 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2021-11-02 23:08:32,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:32,907 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2021-11-02 23:08:32,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:08:32,907 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:32,907 INFO L513 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:32,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2021-11-02 23:08:33,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-11-02 23:08:33,108 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:33,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:33,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1713100526, now seen corresponding path program 155 times [2021-11-02 23:08:33,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:33,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433939403] [2021-11-02 23:08:33,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:33,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:33,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:33,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433939403] [2021-11-02 23:08:33,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433939403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:33,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928722382] [2021-11-02 23:08:33,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:08:33,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:33,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:33,595 INFO L229 MonitoredProcess]: Starting monitored process 179 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:33,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2021-11-02 23:08:36,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-02 23:08:36,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:36,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 23:08:36,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:37,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928722382] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:37,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:37,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-02 23:08:37,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786303446] [2021-11-02 23:08:37,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:08:37,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:37,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:08:37,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:08:37,033 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:38,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:38,779 INFO L93 Difference]: Finished difference Result 199 states and 212 transitions. [2021-11-02 23:08:38,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:08:38,779 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:08:38,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:38,779 INFO L225 Difference]: With dead ends: 199 [2021-11-02 23:08:38,779 INFO L226 Difference]: Without dead ends: 195 [2021-11-02 23:08:38,780 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=920, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:08:38,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-02 23:08:39,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 58. [2021-11-02 23:08:39,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:39,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2021-11-02 23:08:39,050 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2021-11-02 23:08:39,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:39,050 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2021-11-02 23:08:39,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:39,050 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2021-11-02 23:08:39,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:08:39,050 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:39,050 INFO L513 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:39,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2021-11-02 23:08:39,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,179 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:39,251 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:39,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:39,251 INFO L85 PathProgramCache]: Analyzing trace with hash -118179759, now seen corresponding path program 24 times [2021-11-02 23:08:39,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:39,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898977227] [2021-11-02 23:08:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:39,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:39,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:39,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898977227] [2021-11-02 23:08:39,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898977227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:39,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539908514] [2021-11-02 23:08:39,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:08:39,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:39,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:39,728 INFO L229 MonitoredProcess]: Starting monitored process 180 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:39,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2021-11-02 23:08:42,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-02 23:08:42,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:42,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 23:08:42,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:43,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539908514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:43,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:43,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-02 23:08:43,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093810450] [2021-11-02 23:08:43,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:08:43,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:43,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:08:43,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:08:43,063 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:44,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:44,983 INFO L93 Difference]: Finished difference Result 207 states and 221 transitions. [2021-11-02 23:08:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:08:44,983 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:08:44,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:44,984 INFO L225 Difference]: With dead ends: 207 [2021-11-02 23:08:44,984 INFO L226 Difference]: Without dead ends: 203 [2021-11-02 23:08:44,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=809, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:08:44,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-02 23:08:45,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 60. [2021-11-02 23:08:45,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 59 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:45,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-11-02 23:08:45,185 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 32 [2021-11-02 23:08:45,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:45,185 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-11-02 23:08:45,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:45,185 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-11-02 23:08:45,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:08:45,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:45,185 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:45,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:45,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:45,386 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:45,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:45,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1595590025, now seen corresponding path program 156 times [2021-11-02 23:08:45,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:45,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409284246] [2021-11-02 23:08:45,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:45,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:45,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:45,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409284246] [2021-11-02 23:08:45,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409284246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:45,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025596015] [2021-11-02 23:08:45,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:08:45,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:45,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:45,812 INFO L229 MonitoredProcess]: Starting monitored process 181 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:45,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2021-11-02 23:08:48,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-02 23:08:48,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:48,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 23:08:48,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:48,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025596015] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:48,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:48,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 29 [2021-11-02 23:08:48,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516913050] [2021-11-02 23:08:48,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:08:48,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:48,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:08:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:08:48,576 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 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) [2021-11-02 23:08:49,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:49,555 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2021-11-02 23:08:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:08:49,555 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 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 33 [2021-11-02 23:08:49,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:49,556 INFO L225 Difference]: With dead ends: 77 [2021-11-02 23:08:49,556 INFO L226 Difference]: Without dead ends: 58 [2021-11-02 23:08:49,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 23:08:49,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-02 23:08:49,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-02 23:08:49,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:49,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2021-11-02 23:08:49,832 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 33 [2021-11-02 23:08:49,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:49,833 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2021-11-02 23:08:49,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 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) [2021-11-02 23:08:49,833 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2021-11-02 23:08:49,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:08:49,833 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:49,833 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:49,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:50,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:50,034 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:50,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:50,034 INFO L85 PathProgramCache]: Analyzing trace with hash -891952330, now seen corresponding path program 157 times [2021-11-02 23:08:50,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:50,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472467914] [2021-11-02 23:08:50,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:50,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:50,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:50,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472467914] [2021-11-02 23:08:50,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472467914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:50,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159208658] [2021-11-02 23:08:50,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:08:50,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:50,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:50,475 INFO L229 MonitoredProcess]: Starting monitored process 182 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:50,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2021-11-02 23:08:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:52,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 23:08:52,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:53,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159208658] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:53,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:53,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-02 23:08:53,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50708437] [2021-11-02 23:08:53,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:08:53,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:53,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:08:53,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:08:53,098 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:08:53,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:53,951 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2021-11-02 23:08:53,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:08:53,951 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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 33 [2021-11-02 23:08:53,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:53,952 INFO L225 Difference]: With dead ends: 79 [2021-11-02 23:08:53,952 INFO L226 Difference]: Without dead ends: 75 [2021-11-02 23:08:53,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=1671, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 23:08:53,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-02 23:08:54,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2021-11-02 23:08:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 58 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) [2021-11-02 23:08:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-11-02 23:08:54,186 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 33 [2021-11-02 23:08:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:54,186 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-11-02 23:08:54,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:08:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-11-02 23:08:54,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:08:54,186 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:54,186 INFO L513 BasicCegarLoop]: trace histogram [14, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:54,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2021-11-02 23:08:54,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,182 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:54,387 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:54,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:54,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2116180329, now seen corresponding path program 158 times [2021-11-02 23:08:54,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:54,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607970070] [2021-11-02 23:08:54,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:54,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:54,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:54,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607970070] [2021-11-02 23:08:54,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607970070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:54,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359556763] [2021-11-02 23:08:54,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:08:54,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:54,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:54,825 INFO L229 MonitoredProcess]: Starting monitored process 183 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:54,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2021-11-02 23:08:57,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:08:57,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:57,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 23:08:57,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:57,435 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:57,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359556763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:57,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:57,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-02 23:08:57,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75280943] [2021-11-02 23:08:57,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:08:57,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:57,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:08:57,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=801, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:08:57,437 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:08:58,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:58,756 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2021-11-02 23:08:58,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 23:08:58,757 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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 33 [2021-11-02 23:08:58,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:58,757 INFO L225 Difference]: With dead ends: 95 [2021-11-02 23:08:58,757 INFO L226 Difference]: Without dead ends: 91 [2021-11-02 23:08:58,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=2572, Unknown=0, NotChecked=0, Total=2756 [2021-11-02 23:08:58,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-02 23:08:59,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 59. [2021-11-02 23:08:59,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 58 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) [2021-11-02 23:08:59,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-11-02 23:08:59,005 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 33 [2021-11-02 23:08:59,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:59,005 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-11-02 23:08:59,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:08:59,005 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-11-02 23:08:59,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:08:59,006 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:59,006 INFO L513 BasicCegarLoop]: trace histogram [15, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:59,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:59,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-11-02 23:08:59,206 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:59,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:59,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1324387562, now seen corresponding path program 159 times [2021-11-02 23:08:59,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:59,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517983246] [2021-11-02 23:08:59,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:59,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:59,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:59,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517983246] [2021-11-02 23:08:59,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517983246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:59,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983385885] [2021-11-02 23:08:59,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:08:59,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:59,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:59,655 INFO L229 MonitoredProcess]: Starting monitored process 184 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:59,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2021-11-02 23:09:02,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-02 23:09:02,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:02,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 23:09:02,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:03,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983385885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:03,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:03,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-02 23:09:03,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104648539] [2021-11-02 23:09:03,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:09:03,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:03,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:09:03,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:09:03,014 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:09:04,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:04,786 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2021-11-02 23:09:04,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-02 23:09:04,787 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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 33 [2021-11-02 23:09:04,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:04,787 INFO L225 Difference]: With dead ends: 110 [2021-11-02 23:09:04,787 INFO L226 Difference]: Without dead ends: 106 [2021-11-02 23:09:04,788 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=3322, Unknown=0, NotChecked=0, Total=3540 [2021-11-02 23:09:04,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-02 23:09:05,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 59. [2021-11-02 23:09:05,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 58 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) [2021-11-02 23:09:05,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-11-02 23:09:05,030 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 33 [2021-11-02 23:09:05,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:05,030 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-11-02 23:09:05,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:09:05,031 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-11-02 23:09:05,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:09:05,031 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:05,031 INFO L513 BasicCegarLoop]: trace histogram [16, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:05,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:05,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,184 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:05,233 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:05,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:05,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1749195447, now seen corresponding path program 160 times [2021-11-02 23:09:05,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:05,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625645376] [2021-11-02 23:09:05,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:05,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:05,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:05,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625645376] [2021-11-02 23:09:05,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625645376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:05,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69939163] [2021-11-02 23:09:05,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:09:05,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:05,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:05,721 INFO L229 MonitoredProcess]: Starting monitored process 185 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:05,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2021-11-02 23:09:08,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:09:08,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:08,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 23:09:08,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:08,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69939163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:08,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:08,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-02 23:09:08,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896629576] [2021-11-02 23:09:08,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:09:08,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:08,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:09:08,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:09:08,343 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:09:10,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:10,390 INFO L93 Difference]: Finished difference Result 124 states and 137 transitions. [2021-11-02 23:09:10,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-02 23:09:10,391 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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 33 [2021-11-02 23:09:10,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:10,391 INFO L225 Difference]: With dead ends: 124 [2021-11-02 23:09:10,391 INFO L226 Difference]: Without dead ends: 120 [2021-11-02 23:09:10,392 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=3795, Unknown=0, NotChecked=0, Total=4032 [2021-11-02 23:09:10,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-02 23:09:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 59. [2021-11-02 23:09:10,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 58 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) [2021-11-02 23:09:10,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-11-02 23:09:10,619 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 33 [2021-11-02 23:09:10,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:10,619 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-11-02 23:09:10,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:09:10,619 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-11-02 23:09:10,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:09:10,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:10,620 INFO L513 BasicCegarLoop]: trace histogram [17, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:10,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2021-11-02 23:09:10,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,185 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:10,820 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:10,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:10,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1848343286, now seen corresponding path program 161 times [2021-11-02 23:09:10,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:10,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459877359] [2021-11-02 23:09:10,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:10,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:11,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:11,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459877359] [2021-11-02 23:09:11,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459877359] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:11,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72535269] [2021-11-02 23:09:11,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:09:11,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:11,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:11,257 INFO L229 MonitoredProcess]: Starting monitored process 186 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:11,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2021-11-02 23:09:14,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-02 23:09:14,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:14,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 23:09:14,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:14,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72535269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:14,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:14,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-02 23:09:14,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423353896] [2021-11-02 23:09:14,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:09:14,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:14,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:09:14,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=804, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:09:14,393 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:09:16,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:16,475 INFO L93 Difference]: Finished difference Result 137 states and 150 transitions. [2021-11-02 23:09:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-02 23:09:16,475 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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 33 [2021-11-02 23:09:16,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:16,475 INFO L225 Difference]: With dead ends: 137 [2021-11-02 23:09:16,475 INFO L226 Difference]: Without dead ends: 133 [2021-11-02 23:09:16,476 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=241, Invalid=3919, Unknown=0, NotChecked=0, Total=4160 [2021-11-02 23:09:16,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-02 23:09:16,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 59. [2021-11-02 23:09:16,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 58 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) [2021-11-02 23:09:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-11-02 23:09:16,695 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 33 [2021-11-02 23:09:16,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:16,695 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-11-02 23:09:16,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:09:16,695 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-11-02 23:09:16,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:09:16,696 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:16,696 INFO L513 BasicCegarLoop]: trace histogram [18, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:16,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:16,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,186 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:16,910 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:16,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:16,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1435899607, now seen corresponding path program 162 times [2021-11-02 23:09:16,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:16,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022320388] [2021-11-02 23:09:16,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:16,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:17,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:17,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022320388] [2021-11-02 23:09:17,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022320388] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:17,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624467865] [2021-11-02 23:09:17,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:09:17,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:17,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:17,348 INFO L229 MonitoredProcess]: Starting monitored process 187 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:17,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-11-02 23:09:20,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-02 23:09:20,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:20,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 23:09:20,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:20,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624467865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:20,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:20,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-02 23:09:20,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593097038] [2021-11-02 23:09:20,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:09:20,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:20,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:09:20,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=805, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:09:20,636 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:09:22,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:22,804 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2021-11-02 23:09:22,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-02 23:09:22,805 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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 33 [2021-11-02 23:09:22,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:22,805 INFO L225 Difference]: With dead ends: 149 [2021-11-02 23:09:22,805 INFO L226 Difference]: Without dead ends: 145 [2021-11-02 23:09:22,806 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=230, Invalid=3676, Unknown=0, NotChecked=0, Total=3906 [2021-11-02 23:09:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-02 23:09:23,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 59. [2021-11-02 23:09:23,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 58 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) [2021-11-02 23:09:23,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-11-02 23:09:23,047 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 33 [2021-11-02 23:09:23,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:23,047 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-11-02 23:09:23,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:09:23,048 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-11-02 23:09:23,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:09:23,048 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:23,048 INFO L513 BasicCegarLoop]: trace histogram [19, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:23,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2021-11-02 23:09:23,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,187 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:23,262 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:23,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:23,263 INFO L85 PathProgramCache]: Analyzing trace with hash -932709674, now seen corresponding path program 163 times [2021-11-02 23:09:23,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:23,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699673435] [2021-11-02 23:09:23,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:23,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:23,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:23,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699673435] [2021-11-02 23:09:23,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699673435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:23,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439730133] [2021-11-02 23:09:23,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:09:23,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:23,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:23,719 INFO L229 MonitoredProcess]: Starting monitored process 188 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:23,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2021-11-02 23:09:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:26,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 23:09:26,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:26,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439730133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:26,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:26,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-02 23:09:26,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745921042] [2021-11-02 23:09:26,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:09:26,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:26,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:09:26,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:09:26,401 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:09:28,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:28,492 INFO L93 Difference]: Finished difference Result 160 states and 173 transitions. [2021-11-02 23:09:28,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-02 23:09:28,492 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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 33 [2021-11-02 23:09:28,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:28,493 INFO L225 Difference]: With dead ends: 160 [2021-11-02 23:09:28,493 INFO L226 Difference]: Without dead ends: 156 [2021-11-02 23:09:28,493 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=3102, Unknown=0, NotChecked=0, Total=3306 [2021-11-02 23:09:28,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-02 23:09:28,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 59. [2021-11-02 23:09:28,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 58 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) [2021-11-02 23:09:28,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-11-02 23:09:28,706 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 33 [2021-11-02 23:09:28,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:28,707 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-11-02 23:09:28,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:09:28,707 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-11-02 23:09:28,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:09:28,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:28,707 INFO L513 BasicCegarLoop]: trace histogram [20, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:28,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:28,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,188 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:28,908 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:28,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:28,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1009116425, now seen corresponding path program 164 times [2021-11-02 23:09:28,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:28,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998686176] [2021-11-02 23:09:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:28,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:29,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:29,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998686176] [2021-11-02 23:09:29,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998686176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:29,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717012129] [2021-11-02 23:09:29,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:09:29,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:29,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:29,336 INFO L229 MonitoredProcess]: Starting monitored process 189 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:29,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2021-11-02 23:09:31,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:09:31,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:31,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 23:09:31,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:32,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717012129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:32,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:32,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-02 23:09:32,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301031118] [2021-11-02 23:09:32,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:09:32,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:32,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:09:32,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=807, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:09:32,044 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:09:34,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:34,145 INFO L93 Difference]: Finished difference Result 170 states and 183 transitions. [2021-11-02 23:09:34,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 23:09:34,145 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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 33 [2021-11-02 23:09:34,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:34,145 INFO L225 Difference]: With dead ends: 170 [2021-11-02 23:09:34,146 INFO L226 Difference]: Without dead ends: 166 [2021-11-02 23:09:34,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=2382, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 23:09:34,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-02 23:09:34,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 59. [2021-11-02 23:09:34,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 58 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) [2021-11-02 23:09:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-11-02 23:09:34,368 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 33 [2021-11-02 23:09:34,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:34,369 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-11-02 23:09:34,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:09:34,369 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-11-02 23:09:34,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:09:34,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:34,369 INFO L513 BasicCegarLoop]: trace histogram [21, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:34,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2021-11-02 23:09:34,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-11-02 23:09:34,570 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:34,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:34,570 INFO L85 PathProgramCache]: Analyzing trace with hash -41749834, now seen corresponding path program 165 times [2021-11-02 23:09:34,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:34,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224317300] [2021-11-02 23:09:34,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:34,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:35,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:35,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224317300] [2021-11-02 23:09:35,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224317300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:35,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919982246] [2021-11-02 23:09:35,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:09:35,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:35,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:35,011 INFO L229 MonitoredProcess]: Starting monitored process 190 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:35,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-11-02 23:09:39,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-02 23:09:39,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:39,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 23:09:39,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:39,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919982246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:39,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:39,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-02 23:09:39,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442034447] [2021-11-02 23:09:39,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:09:39,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:39,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:09:39,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=808, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:09:39,274 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:09:41,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:41,565 INFO L93 Difference]: Finished difference Result 179 states and 192 transitions. [2021-11-02 23:09:41,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 23:09:41,566 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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 33 [2021-11-02 23:09:41,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:41,566 INFO L225 Difference]: With dead ends: 179 [2021-11-02 23:09:41,566 INFO L226 Difference]: Without dead ends: 175 [2021-11-02 23:09:41,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=1843, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:09:41,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-02 23:09:41,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 59. [2021-11-02 23:09:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 58 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) [2021-11-02 23:09:41,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-11-02 23:09:41,794 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 33 [2021-11-02 23:09:41,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:41,794 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-11-02 23:09:41,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:09:41,794 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-11-02 23:09:41,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:09:41,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:41,794 INFO L513 BasicCegarLoop]: trace histogram [22, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:41,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2021-11-02 23:09:41,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,190 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:41,999 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:42,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:42,000 INFO L85 PathProgramCache]: Analyzing trace with hash -980375785, now seen corresponding path program 166 times [2021-11-02 23:09:42,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:42,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311236601] [2021-11-02 23:09:42,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:42,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:42,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:42,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311236601] [2021-11-02 23:09:42,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311236601] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:42,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308300883] [2021-11-02 23:09:42,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:09:42,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:42,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:42,497 INFO L229 MonitoredProcess]: Starting monitored process 191 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:42,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2021-11-02 23:09:45,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:09:45,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:45,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 23:09:45,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:45,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308300883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:45,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:45,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-02 23:09:45,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031679296] [2021-11-02 23:09:45,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:09:45,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:45,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:09:45,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=809, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:09:45,254 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:09:47,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:47,159 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2021-11-02 23:09:47,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 23:09:47,159 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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 33 [2021-11-02 23:09:47,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:47,160 INFO L225 Difference]: With dead ends: 187 [2021-11-02 23:09:47,160 INFO L226 Difference]: Without dead ends: 183 [2021-11-02 23:09:47,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=1449, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:09:47,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-02 23:09:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 59. [2021-11-02 23:09:47,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 58 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) [2021-11-02 23:09:47,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-11-02 23:09:47,399 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 33 [2021-11-02 23:09:47,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:47,400 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-11-02 23:09:47,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:09:47,400 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-11-02 23:09:47,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:09:47,400 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:47,401 INFO L513 BasicCegarLoop]: trace histogram [23, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:47,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2021-11-02 23:09:47,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,191 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:47,607 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:47,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:47,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1564843370, now seen corresponding path program 167 times [2021-11-02 23:09:47,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:47,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204586892] [2021-11-02 23:09:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:47,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:48,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:48,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204586892] [2021-11-02 23:09:48,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204586892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:48,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851711195] [2021-11-02 23:09:48,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:09:48,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:48,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:48,061 INFO L229 MonitoredProcess]: Starting monitored process 192 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:48,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2021-11-02 23:09:51,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-02 23:09:51,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:51,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 23:09:51,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:51,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851711195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:51,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:51,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-02 23:09:51,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264371368] [2021-11-02 23:09:51,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:09:51,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:51,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:09:51,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=810, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:09:51,575 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:09:53,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:53,802 INFO L93 Difference]: Finished difference Result 194 states and 207 transitions. [2021-11-02 23:09:53,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:09:53,802 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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 33 [2021-11-02 23:09:53,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:53,803 INFO L225 Difference]: With dead ends: 194 [2021-11-02 23:09:53,803 INFO L226 Difference]: Without dead ends: 190 [2021-11-02 23:09:53,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:09:53,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-02 23:09:54,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 59. [2021-11-02 23:09:54,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 58 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) [2021-11-02 23:09:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-11-02 23:09:54,026 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 33 [2021-11-02 23:09:54,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:54,026 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-11-02 23:09:54,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:09:54,026 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-11-02 23:09:54,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:09:54,027 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:54,027 INFO L513 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:54,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2021-11-02 23:09:54,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-11-02 23:09:54,227 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:54,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:54,227 INFO L85 PathProgramCache]: Analyzing trace with hash 633060151, now seen corresponding path program 168 times [2021-11-02 23:09:54,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:54,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043990829] [2021-11-02 23:09:54,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:54,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:54,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:54,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043990829] [2021-11-02 23:09:54,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043990829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:54,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274216854] [2021-11-02 23:09:54,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:09:54,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:54,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:54,664 INFO L229 MonitoredProcess]: Starting monitored process 193 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:54,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-11-02 23:09:58,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-02 23:09:58,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:58,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 23:09:58,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:58,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274216854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:58,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:58,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-02 23:09:58,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135089591] [2021-11-02 23:09:58,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:09:58,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:58,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:09:58,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:09:58,329 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:10:00,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:00,252 INFO L93 Difference]: Finished difference Result 200 states and 213 transitions. [2021-11-02 23:10:00,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:10:00,252 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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 33 [2021-11-02 23:10:00,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:00,253 INFO L225 Difference]: With dead ends: 200 [2021-11-02 23:10:00,253 INFO L226 Difference]: Without dead ends: 196 [2021-11-02 23:10:00,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=982, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:10:00,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-02 23:10:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 59. [2021-11-02 23:10:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 58 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) [2021-11-02 23:10:00,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-11-02 23:10:00,517 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 33 [2021-11-02 23:10:00,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:00,517 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-11-02 23:10:00,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:10:00,518 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-11-02 23:10:00,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:10:00,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:00,518 INFO L513 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:00,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:00,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,193 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:00,718 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:00,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:00,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2066986378, now seen corresponding path program 25 times [2021-11-02 23:10:00,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:00,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435544456] [2021-11-02 23:10:00,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:00,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:01,157 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:01,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:01,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435544456] [2021-11-02 23:10:01,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435544456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:01,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648359568] [2021-11-02 23:10:01,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:10:01,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:01,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:01,158 INFO L229 MonitoredProcess]: Starting monitored process 194 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:01,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2021-11-02 23:10:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:03,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 23:10:03,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:03,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648359568] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:03,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:03,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-02 23:10:03,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891165734] [2021-11-02 23:10:03,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:10:03,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:03,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:10:03,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:10:03,962 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:10:05,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:05,842 INFO L93 Difference]: Finished difference Result 208 states and 222 transitions. [2021-11-02 23:10:05,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:10:05,842 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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 33 [2021-11-02 23:10:05,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:05,843 INFO L225 Difference]: With dead ends: 208 [2021-11-02 23:10:05,843 INFO L226 Difference]: Without dead ends: 204 [2021-11-02 23:10:05,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=867, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:10:05,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-02 23:10:06,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 61. [2021-11-02 23:10:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.25) internal successors, (75), 60 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:06,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2021-11-02 23:10:06,072 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 33 [2021-11-02 23:10:06,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:06,072 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2021-11-02 23:10:06,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:10:06,072 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2021-11-02 23:10:06,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 23:10:06,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:06,072 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:06,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2021-11-02 23:10:06,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,194 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:06,273 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:06,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:06,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1879053070, now seen corresponding path program 169 times [2021-11-02 23:10:06,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:06,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123663613] [2021-11-02 23:10:06,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:06,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:07,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:07,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123663613] [2021-11-02 23:10:07,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123663613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:07,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168985175] [2021-11-02 23:10:07,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:10:07,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:07,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:07,444 INFO L229 MonitoredProcess]: Starting monitored process 195 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:07,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2021-11-02 23:10:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:10,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 23:10:10,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:10,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168985175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:10,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:10,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 17] total 44 [2021-11-02 23:10:10,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399971425] [2021-11-02 23:10:10,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-02 23:10:10,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:10,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-02 23:10:10,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1768, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:10:10,589 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 44 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 44 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) [2021-11-02 23:10:11,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:11,638 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2021-11-02 23:10:11,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:10:11,639 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 44 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-02 23:10:11,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:11,639 INFO L225 Difference]: With dead ends: 78 [2021-11-02 23:10:11,639 INFO L226 Difference]: Without dead ends: 74 [2021-11-02 23:10:11,639 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:10:11,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-02 23:10:11,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2021-11-02 23:10:11,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 61 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:11,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2021-11-02 23:10:11,895 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 34 [2021-11-02 23:10:11,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:11,895 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2021-11-02 23:10:11,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 44 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) [2021-11-02 23:10:11,895 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2021-11-02 23:10:11,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 23:10:11,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:11,895 INFO L513 BasicCegarLoop]: trace histogram [14, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:11,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:12,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,195 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:12,103 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:12,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:12,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1175415375, now seen corresponding path program 170 times [2021-11-02 23:10:12,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:12,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8227829] [2021-11-02 23:10:12,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:12,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:12,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:12,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8227829] [2021-11-02 23:10:12,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8227829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:12,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039098333] [2021-11-02 23:10:12,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:10:12,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:12,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:12,604 INFO L229 MonitoredProcess]: Starting monitored process 196 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:12,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2021-11-02 23:10:15,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:10:15,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:15,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 23:10:15,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:15,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039098333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:15,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:15,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-02 23:10:15,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963982511] [2021-11-02 23:10:15,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:10:15,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:15,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:10:15,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:10:15,498 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:17,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:17,047 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2021-11-02 23:10:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 23:10:17,048 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-02 23:10:17,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:17,048 INFO L225 Difference]: With dead ends: 100 [2021-11-02 23:10:17,048 INFO L226 Difference]: Without dead ends: 96 [2021-11-02 23:10:17,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=2883, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:10:17,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-02 23:10:17,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 62. [2021-11-02 23:10:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 61 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:17,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2021-11-02 23:10:17,332 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 34 [2021-11-02 23:10:17,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:17,332 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2021-11-02 23:10:17,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:17,332 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2021-11-02 23:10:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 23:10:17,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:17,333 INFO L513 BasicCegarLoop]: trace histogram [15, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:17,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2021-11-02 23:10:17,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,196 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:17,533 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:17,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:17,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1895323922, now seen corresponding path program 171 times [2021-11-02 23:10:17,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:17,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723036741] [2021-11-02 23:10:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:17,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:17,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:17,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723036741] [2021-11-02 23:10:17,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723036741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:17,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653771296] [2021-11-02 23:10:17,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:10:17,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:17,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:17,994 INFO L229 MonitoredProcess]: Starting monitored process 197 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:17,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2021-11-02 23:10:21,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-02 23:10:21,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:21,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 23:10:21,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:21,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653771296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:21,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:21,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-02 23:10:21,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315473983] [2021-11-02 23:10:21,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:10:21,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:21,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:10:21,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:10:21,982 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:23,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:23,928 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2021-11-02 23:10:23,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-02 23:10:23,928 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-02 23:10:23,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:23,928 INFO L225 Difference]: With dead ends: 116 [2021-11-02 23:10:23,928 INFO L226 Difference]: Without dead ends: 112 [2021-11-02 23:10:23,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=236, Invalid=3796, Unknown=0, NotChecked=0, Total=4032 [2021-11-02 23:10:23,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-02 23:10:24,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 62. [2021-11-02 23:10:24,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 61 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2021-11-02 23:10:24,205 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 34 [2021-11-02 23:10:24,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:24,205 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2021-11-02 23:10:24,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:24,205 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2021-11-02 23:10:24,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 23:10:24,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:24,205 INFO L513 BasicCegarLoop]: trace histogram [16, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:24,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:24,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,197 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:24,406 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:24,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:24,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1607850607, now seen corresponding path program 172 times [2021-11-02 23:10:24,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:24,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165191110] [2021-11-02 23:10:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:24,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:24,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:24,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165191110] [2021-11-02 23:10:24,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165191110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:24,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865791412] [2021-11-02 23:10:24,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:10:24,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:24,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:24,877 INFO L229 MonitoredProcess]: Starting monitored process 198 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:24,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2021-11-02 23:10:27,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:10:27,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:27,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 23:10:27,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:27,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865791412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:27,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:27,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-02 23:10:27,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072925081] [2021-11-02 23:10:27,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:10:27,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:27,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:10:27,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:10:27,754 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:30,072 INFO L93 Difference]: Finished difference Result 131 states and 145 transitions. [2021-11-02 23:10:30,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-02 23:10:30,073 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-02 23:10:30,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:30,073 INFO L225 Difference]: With dead ends: 131 [2021-11-02 23:10:30,073 INFO L226 Difference]: Without dead ends: 127 [2021-11-02 23:10:30,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=260, Invalid=4432, Unknown=0, NotChecked=0, Total=4692 [2021-11-02 23:10:30,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-02 23:10:30,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 62. [2021-11-02 23:10:30,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 61 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:30,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2021-11-02 23:10:30,351 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 34 [2021-11-02 23:10:30,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:30,351 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2021-11-02 23:10:30,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:30,351 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2021-11-02 23:10:30,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 23:10:30,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:30,351 INFO L513 BasicCegarLoop]: trace histogram [17, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:30,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:30,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,198 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:30,552 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:30,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:30,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1465732402, now seen corresponding path program 173 times [2021-11-02 23:10:30,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:30,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269356803] [2021-11-02 23:10:30,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:30,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:31,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:31,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269356803] [2021-11-02 23:10:31,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269356803] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:31,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106111071] [2021-11-02 23:10:31,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:10:31,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:31,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:31,068 INFO L229 MonitoredProcess]: Starting monitored process 199 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:31,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2021-11-02 23:10:35,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-02 23:10:35,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:35,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 23:10:35,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:35,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106111071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:35,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:35,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-02 23:10:35,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895226132] [2021-11-02 23:10:35,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:10:35,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:35,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:10:35,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:10:35,808 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:38,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:38,369 INFO L93 Difference]: Finished difference Result 145 states and 159 transitions. [2021-11-02 23:10:38,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-02 23:10:38,369 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-02 23:10:38,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:38,369 INFO L225 Difference]: With dead ends: 145 [2021-11-02 23:10:38,370 INFO L226 Difference]: Without dead ends: 141 [2021-11-02 23:10:38,370 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=269, Invalid=4701, Unknown=0, NotChecked=0, Total=4970 [2021-11-02 23:10:38,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-02 23:10:38,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 62. [2021-11-02 23:10:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 61 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:38,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2021-11-02 23:10:38,663 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 34 [2021-11-02 23:10:38,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:38,663 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2021-11-02 23:10:38,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:38,663 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2021-11-02 23:10:38,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 23:10:38,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:38,663 INFO L513 BasicCegarLoop]: trace histogram [18, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:38,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2021-11-02 23:10:38,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-11-02 23:10:38,864 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:38,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:38,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1564880241, now seen corresponding path program 174 times [2021-11-02 23:10:38,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:38,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791767487] [2021-11-02 23:10:38,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:38,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:39,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:39,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791767487] [2021-11-02 23:10:39,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791767487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:39,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929768550] [2021-11-02 23:10:39,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:10:39,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:39,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:39,347 INFO L229 MonitoredProcess]: Starting monitored process 200 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:39,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-11-02 23:10:42,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-02 23:10:42,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:42,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 23:10:42,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:42,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929768550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:42,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:42,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-02 23:10:42,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430871087] [2021-11-02 23:10:42,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:10:42,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:42,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:10:42,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=862, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:10:42,951 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:45,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:45,764 INFO L93 Difference]: Finished difference Result 158 states and 172 transitions. [2021-11-02 23:10:45,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-02 23:10:45,765 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-02 23:10:45,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:45,765 INFO L225 Difference]: With dead ends: 158 [2021-11-02 23:10:45,765 INFO L226 Difference]: Without dead ends: 154 [2021-11-02 23:10:45,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=263, Invalid=4567, Unknown=0, NotChecked=0, Total=4830 [2021-11-02 23:10:45,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-02 23:10:46,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 62. [2021-11-02 23:10:46,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 61 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:46,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2021-11-02 23:10:46,061 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 34 [2021-11-02 23:10:46,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:46,061 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2021-11-02 23:10:46,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:46,061 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2021-11-02 23:10:46,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 23:10:46,061 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:46,061 INFO L513 BasicCegarLoop]: trace histogram [19, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:46,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:46,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-11-02 23:10:46,262 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:46,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:46,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1152436562, now seen corresponding path program 175 times [2021-11-02 23:10:46,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:46,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242182540] [2021-11-02 23:10:46,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:46,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:46,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:46,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242182540] [2021-11-02 23:10:46,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242182540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:46,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637514019] [2021-11-02 23:10:46,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:10:46,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:46,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:46,730 INFO L229 MonitoredProcess]: Starting monitored process 201 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:46,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2021-11-02 23:10:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:49,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 23:10:49,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:49,660 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:49,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637514019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:49,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:49,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-02 23:10:49,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394047531] [2021-11-02 23:10:49,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:10:49,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:49,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:10:49,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:10:49,661 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:52,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:52,484 INFO L93 Difference]: Finished difference Result 170 states and 184 transitions. [2021-11-02 23:10:52,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-02 23:10:52,484 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-02 23:10:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:52,485 INFO L225 Difference]: With dead ends: 170 [2021-11-02 23:10:52,485 INFO L226 Difference]: Without dead ends: 166 [2021-11-02 23:10:52,485 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=242, Invalid=4048, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 23:10:52,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-02 23:10:52,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 62. [2021-11-02 23:10:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 61 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:52,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2021-11-02 23:10:52,778 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 34 [2021-11-02 23:10:52,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:52,779 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2021-11-02 23:10:52,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:52,779 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2021-11-02 23:10:52,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 23:10:52,779 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:52,779 INFO L513 BasicCegarLoop]: trace histogram [20, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:52,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2021-11-02 23:10:52,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-11-02 23:10:52,980 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:52,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:52,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1216172719, now seen corresponding path program 176 times [2021-11-02 23:10:52,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:52,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955688123] [2021-11-02 23:10:52,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:52,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:53,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:53,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955688123] [2021-11-02 23:10:53,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955688123] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:53,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959123184] [2021-11-02 23:10:53,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:10:53,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:53,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:53,486 INFO L229 MonitoredProcess]: Starting monitored process 202 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:53,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2021-11-02 23:10:56,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:10:56,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:56,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 23:10:56,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:56,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959123184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:56,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:56,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-02 23:10:56,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458041575] [2021-11-02 23:10:56,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:10:56,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:56,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:10:56,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=864, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:10:56,473 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:59,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:59,337 INFO L93 Difference]: Finished difference Result 181 states and 195 transitions. [2021-11-02 23:10:59,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-02 23:10:59,337 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-02 23:10:59,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:59,337 INFO L225 Difference]: With dead ends: 181 [2021-11-02 23:10:59,337 INFO L226 Difference]: Without dead ends: 177 [2021-11-02 23:10:59,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=3216, Unknown=0, NotChecked=0, Total=3422 [2021-11-02 23:10:59,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-02 23:10:59,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 62. [2021-11-02 23:10:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 61 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:59,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2021-11-02 23:10:59,630 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 34 [2021-11-02 23:10:59,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:59,630 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2021-11-02 23:10:59,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:59,630 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2021-11-02 23:10:59,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 23:10:59,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:59,631 INFO L513 BasicCegarLoop]: trace histogram [21, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:59,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2021-11-02 23:10:59,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-11-02 23:10:59,831 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:59,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:59,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1292579470, now seen corresponding path program 177 times [2021-11-02 23:10:59,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:59,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767849332] [2021-11-02 23:10:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:59,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:00,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:00,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767849332] [2021-11-02 23:11:00,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767849332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:00,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977024604] [2021-11-02 23:11:00,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:11:00,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:00,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:00,300 INFO L229 MonitoredProcess]: Starting monitored process 203 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:00,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-11-02 23:11:03,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-02 23:11:03,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:03,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 23:11:03,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:04,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977024604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:04,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:04,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-02 23:11:04,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010283011] [2021-11-02 23:11:04,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:11:04,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:04,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:11:04,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=865, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:11:04,090 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:06,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:06,661 INFO L93 Difference]: Finished difference Result 191 states and 205 transitions. [2021-11-02 23:11:06,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-02 23:11:06,661 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-02 23:11:06,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:06,662 INFO L225 Difference]: With dead ends: 191 [2021-11-02 23:11:06,662 INFO L226 Difference]: Without dead ends: 187 [2021-11-02 23:11:06,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=2482, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 23:11:06,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-02 23:11:06,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 62. [2021-11-02 23:11:06,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 61 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:06,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2021-11-02 23:11:06,964 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 34 [2021-11-02 23:11:06,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:06,964 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2021-11-02 23:11:06,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:06,964 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2021-11-02 23:11:06,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 23:11:06,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:06,965 INFO L513 BasicCegarLoop]: trace histogram [22, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:06,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:07,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,203 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:07,165 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:07,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:07,165 INFO L85 PathProgramCache]: Analyzing trace with hash -325212879, now seen corresponding path program 178 times [2021-11-02 23:11:07,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:07,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289656885] [2021-11-02 23:11:07,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:07,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:07,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:07,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289656885] [2021-11-02 23:11:07,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289656885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:07,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829506775] [2021-11-02 23:11:07,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:11:07,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:07,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:07,668 INFO L229 MonitoredProcess]: Starting monitored process 204 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:07,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2021-11-02 23:11:10,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:11:10,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:10,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 23:11:10,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:10,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829506775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:10,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:10,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-02 23:11:10,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782689433] [2021-11-02 23:11:10,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:11:10,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:10,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:11:10,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=866, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:11:10,680 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:13,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:13,475 INFO L93 Difference]: Finished difference Result 200 states and 214 transitions. [2021-11-02 23:11:13,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 23:11:13,476 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-02 23:11:13,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:13,476 INFO L225 Difference]: With dead ends: 200 [2021-11-02 23:11:13,476 INFO L226 Difference]: Without dead ends: 196 [2021-11-02 23:11:13,476 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=1931, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:11:13,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-02 23:11:13,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 62. [2021-11-02 23:11:13,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 61 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:13,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2021-11-02 23:11:13,768 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 34 [2021-11-02 23:11:13,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:13,768 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2021-11-02 23:11:13,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:13,769 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2021-11-02 23:11:13,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 23:11:13,769 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:13,769 INFO L513 BasicCegarLoop]: trace histogram [23, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:13,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2021-11-02 23:11:13,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,204 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:13,969 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:13,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:13,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1263838830, now seen corresponding path program 179 times [2021-11-02 23:11:13,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:13,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677546436] [2021-11-02 23:11:13,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:13,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:14,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:14,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677546436] [2021-11-02 23:11:14,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677546436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:14,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337401565] [2021-11-02 23:11:14,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:11:14,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:14,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:14,442 INFO L229 MonitoredProcess]: Starting monitored process 205 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:14,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2021-11-02 23:11:18,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-02 23:11:18,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:18,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 23:11:18,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:18,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337401565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:18,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:18,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-02 23:11:18,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814645578] [2021-11-02 23:11:18,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:11:18,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:18,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:11:18,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=867, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:11:18,349 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:20,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:20,950 INFO L93 Difference]: Finished difference Result 208 states and 222 transitions. [2021-11-02 23:11:20,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 23:11:20,950 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-02 23:11:20,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:20,951 INFO L225 Difference]: With dead ends: 208 [2021-11-02 23:11:20,951 INFO L226 Difference]: Without dead ends: 204 [2021-11-02 23:11:20,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 23:11:20,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-02 23:11:21,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 62. [2021-11-02 23:11:21,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 61 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:21,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2021-11-02 23:11:21,248 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 34 [2021-11-02 23:11:21,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:21,248 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2021-11-02 23:11:21,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:21,248 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2021-11-02 23:11:21,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 23:11:21,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:21,248 INFO L513 BasicCegarLoop]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:21,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2021-11-02 23:11:21,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-11-02 23:11:21,449 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:21,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:21,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1848306415, now seen corresponding path program 180 times [2021-11-02 23:11:21,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:21,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930390115] [2021-11-02 23:11:21,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:21,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 303 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:21,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:21,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930390115] [2021-11-02 23:11:21,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930390115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:21,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483912830] [2021-11-02 23:11:21,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:11:21,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:21,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:21,918 INFO L229 MonitoredProcess]: Starting monitored process 206 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:21,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2021-11-02 23:11:25,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-02 23:11:25,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:25,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 23:11:25,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 303 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:25,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483912830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:25,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:25,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-02 23:11:25,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281710004] [2021-11-02 23:11:25,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:11:25,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:25,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:11:25,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=868, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:11:25,948 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:28,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:28,502 INFO L93 Difference]: Finished difference Result 215 states and 229 transitions. [2021-11-02 23:11:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 23:11:28,502 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-02 23:11:28,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:28,503 INFO L225 Difference]: With dead ends: 215 [2021-11-02 23:11:28,503 INFO L226 Difference]: Without dead ends: 211 [2021-11-02 23:11:28,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=1240, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:11:28,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-02 23:11:28,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 62. [2021-11-02 23:11:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 61 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:28,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2021-11-02 23:11:28,793 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 34 [2021-11-02 23:11:28,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:28,794 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2021-11-02 23:11:28,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:28,794 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2021-11-02 23:11:28,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 23:11:28,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:28,794 INFO L513 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:28,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2021-11-02 23:11:28,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-11-02 23:11:28,995 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:28,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:28,995 INFO L85 PathProgramCache]: Analyzing trace with hash 349597106, now seen corresponding path program 181 times [2021-11-02 23:11:28,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:28,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165426] [2021-11-02 23:11:28,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:28,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:29,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:29,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165426] [2021-11-02 23:11:29,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165426] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:29,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986009198] [2021-11-02 23:11:29,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:11:29,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:29,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:29,459 INFO L229 MonitoredProcess]: Starting monitored process 207 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:29,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2021-11-02 23:11:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:32,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 23:11:32,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:32,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986009198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:32,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:32,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-02 23:11:32,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209719124] [2021-11-02 23:11:32,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:11:32,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:32,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:11:32,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:11:32,527 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:35,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:35,063 INFO L93 Difference]: Finished difference Result 221 states and 235 transitions. [2021-11-02 23:11:35,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:11:35,063 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-02 23:11:35,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:35,064 INFO L225 Difference]: With dead ends: 221 [2021-11-02 23:11:35,064 INFO L226 Difference]: Without dead ends: 217 [2021-11-02 23:11:35,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=1046, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:11:35,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-02 23:11:35,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 62. [2021-11-02 23:11:35,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 61 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:35,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2021-11-02 23:11:35,357 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 34 [2021-11-02 23:11:35,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:35,357 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2021-11-02 23:11:35,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:35,357 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2021-11-02 23:11:35,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 23:11:35,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:35,357 INFO L513 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:35,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2021-11-02 23:11:35,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,207 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:35,558 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:35,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:35,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1944517873, now seen corresponding path program 26 times [2021-11-02 23:11:35,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:35,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221431852] [2021-11-02 23:11:35,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:35,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:36,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:36,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221431852] [2021-11-02 23:11:36,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221431852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:36,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717587006] [2021-11-02 23:11:36,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:11:36,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:36,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:36,162 INFO L229 MonitoredProcess]: Starting monitored process 208 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:36,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2021-11-02 23:11:39,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:11:39,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:39,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 23:11:39,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:39,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717587006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:39,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:39,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-02 23:11:39,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294701347] [2021-11-02 23:11:39,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:11:39,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:39,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:11:39,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:11:39,277 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:41,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:41,817 INFO L93 Difference]: Finished difference Result 229 states and 244 transitions. [2021-11-02 23:11:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:11:41,817 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-02 23:11:41,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:41,817 INFO L225 Difference]: With dead ends: 229 [2021-11-02 23:11:41,817 INFO L226 Difference]: Without dead ends: 225 [2021-11-02 23:11:41,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=927, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:11:41,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-02 23:11:42,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 64. [2021-11-02 23:11:42,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.253968253968254) internal successors, (79), 63 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) [2021-11-02 23:11:42,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2021-11-02 23:11:42,121 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 34 [2021-11-02 23:11:42,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:42,121 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2021-11-02 23:11:42,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:42,121 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2021-11-02 23:11:42,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 23:11:42,121 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:42,121 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:42,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2021-11-02 23:11:42,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,208 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:42,322 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:42,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:42,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1880562358, now seen corresponding path program 182 times [2021-11-02 23:11:42,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:42,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674846220] [2021-11-02 23:11:42,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:42,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:42,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:42,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674846220] [2021-11-02 23:11:42,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674846220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:42,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118110064] [2021-11-02 23:11:42,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:11:42,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:42,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:42,793 INFO L229 MonitoredProcess]: Starting monitored process 209 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:42,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2021-11-02 23:11:45,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:11:45,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:45,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 23:11:45,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:45,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118110064] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:45,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:45,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-11-02 23:11:45,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602472309] [2021-11-02 23:11:45,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:11:45,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:45,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:11:45,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:11:45,917 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:11:47,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:47,028 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2021-11-02 23:11:47,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:11:47,028 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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 [2021-11-02 23:11:47,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:47,029 INFO L225 Difference]: With dead ends: 82 [2021-11-02 23:11:47,029 INFO L226 Difference]: Without dead ends: 62 [2021-11-02 23:11:47,029 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=1779, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:11:47,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-02 23:11:47,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-02 23:11:47,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 61 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:47,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2021-11-02 23:11:47,306 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 35 [2021-11-02 23:11:47,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:47,306 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2021-11-02 23:11:47,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 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) [2021-11-02 23:11:47,306 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2021-11-02 23:11:47,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 23:11:47,306 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:47,306 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:47,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2021-11-02 23:11:47,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,209 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:47,507 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:47,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2076472873, now seen corresponding path program 183 times [2021-11-02 23:11:47,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:47,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927985500] [2021-11-02 23:11:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:47,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:48,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:48,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927985500] [2021-11-02 23:11:48,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927985500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:48,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963688688] [2021-11-02 23:11:48,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:11:48,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:48,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:48,004 INFO L229 MonitoredProcess]: Starting monitored process 210 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:48,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2021-11-02 23:11:52,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-02 23:11:52,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:52,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-02 23:11:52,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:52,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963688688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:52,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:52,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-02 23:11:52,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262660926] [2021-11-02 23:11:52,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 23:11:52,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:52,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 23:11:52,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:11:52,287 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 32 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:53,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:53,398 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2021-11-02 23:11:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:11:53,398 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-02 23:11:53,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:53,399 INFO L225 Difference]: With dead ends: 84 [2021-11-02 23:11:53,399 INFO L226 Difference]: Without dead ends: 80 [2021-11-02 23:11:53,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=1925, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:11:53,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-02 23:11:53,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2021-11-02 23:11:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 62 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-11-02 23:11:53,712 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 35 [2021-11-02 23:11:53,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:53,712 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-11-02 23:11:53,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:53,713 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-11-02 23:11:53,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 23:11:53,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:53,713 INFO L513 BasicCegarLoop]: trace histogram [15, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:53,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2021-11-02 23:11:53,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-11-02 23:11:53,914 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:53,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:53,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1372835178, now seen corresponding path program 184 times [2021-11-02 23:11:53,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:53,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355648481] [2021-11-02 23:11:53,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:53,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:54,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:54,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355648481] [2021-11-02 23:11:54,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355648481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:54,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753535030] [2021-11-02 23:11:54,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:11:54,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:54,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:54,423 INFO L229 MonitoredProcess]: Starting monitored process 211 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:54,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2021-11-02 23:11:57,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:11:57,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:57,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-02 23:11:57,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:57,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753535030] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:57,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:57,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-02 23:11:57,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570396201] [2021-11-02 23:11:57,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 23:11:57,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:57,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 23:11:57,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:11:57,685 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 32 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:59,550 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2021-11-02 23:11:59,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-02 23:11:59,550 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-02 23:11:59,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:59,551 INFO L225 Difference]: With dead ends: 101 [2021-11-02 23:11:59,551 INFO L226 Difference]: Without dead ends: 97 [2021-11-02 23:11:59,551 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=199, Invalid=2993, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 23:11:59,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-02 23:11:59,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 63. [2021-11-02 23:11:59,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 62 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:59,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-11-02 23:11:59,932 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 35 [2021-11-02 23:11:59,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:59,932 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-11-02 23:11:59,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:59,932 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-11-02 23:11:59,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 23:11:59,932 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:59,933 INFO L513 BasicCegarLoop]: trace histogram [16, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:59,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2021-11-02 23:12:00,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,211 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:00,133 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:00,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:00,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1697904119, now seen corresponding path program 185 times [2021-11-02 23:12:00,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:00,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168261041] [2021-11-02 23:12:00,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:00,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:00,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:00,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168261041] [2021-11-02 23:12:00,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168261041] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:00,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160325584] [2021-11-02 23:12:00,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:12:00,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:00,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:00,677 INFO L229 MonitoredProcess]: Starting monitored process 212 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:00,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2021-11-02 23:12:10,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-02 23:12:10,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:10,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-02 23:12:10,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:10,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160325584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:10,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:10,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-02 23:12:10,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862972872] [2021-11-02 23:12:10,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 23:12:10,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:10,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 23:12:10,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=919, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:12:10,375 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 32 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:12,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:12,717 INFO L93 Difference]: Finished difference Result 117 states and 131 transitions. [2021-11-02 23:12:12,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-02 23:12:12,717 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-02 23:12:12,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:12,717 INFO L225 Difference]: With dead ends: 117 [2021-11-02 23:12:12,717 INFO L226 Difference]: Without dead ends: 113 [2021-11-02 23:12:12,718 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=238, Invalid=3922, Unknown=0, NotChecked=0, Total=4160 [2021-11-02 23:12:12,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-02 23:12:13,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 63. [2021-11-02 23:12:13,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 62 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-11-02 23:12:13,111 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 35 [2021-11-02 23:12:13,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:13,112 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-11-02 23:12:13,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:13,112 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-11-02 23:12:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 23:12:13,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:13,112 INFO L513 BasicCegarLoop]: trace histogram [17, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:13,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:13,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-11-02 23:12:13,313 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:13,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:13,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1805270410, now seen corresponding path program 186 times [2021-11-02 23:12:13,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:13,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269528128] [2021-11-02 23:12:13,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:13,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:13,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:13,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269528128] [2021-11-02 23:12:13,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269528128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:13,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548457319] [2021-11-02 23:12:13,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:12:13,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:13,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:13,884 INFO L229 MonitoredProcess]: Starting monitored process 213 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:13,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2021-11-02 23:12:17,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-02 23:12:17,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:17,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-02 23:12:17,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:17,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548457319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:17,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:17,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-02 23:12:17,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332785318] [2021-11-02 23:12:17,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 23:12:17,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:17,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 23:12:17,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=920, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:12:17,535 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 32 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:20,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:20,468 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2021-11-02 23:12:20,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-02 23:12:20,468 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-02 23:12:20,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:20,469 INFO L225 Difference]: With dead ends: 132 [2021-11-02 23:12:20,469 INFO L226 Difference]: Without dead ends: 128 [2021-11-02 23:12:20,469 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=262, Invalid=4568, Unknown=0, NotChecked=0, Total=4830 [2021-11-02 23:12:20,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-02 23:12:20,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 63. [2021-11-02 23:12:20,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 62 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:20,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-11-02 23:12:20,861 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 35 [2021-11-02 23:12:20,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:20,862 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-11-02 23:12:20,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:20,862 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-11-02 23:12:20,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 23:12:20,862 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:20,862 INFO L513 BasicCegarLoop]: trace histogram [18, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:20,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:21,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-11-02 23:12:21,079 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:21,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:21,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1268312599, now seen corresponding path program 187 times [2021-11-02 23:12:21,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:21,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243070544] [2021-11-02 23:12:21,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:21,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:21,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:21,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243070544] [2021-11-02 23:12:21,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243070544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:21,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610034661] [2021-11-02 23:12:21,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:12:21,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:21,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:21,604 INFO L229 MonitoredProcess]: Starting monitored process 214 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:21,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2021-11-02 23:12:24,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:24,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-02 23:12:24,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:24,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610034661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:24,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:24,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-02 23:12:24,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402378668] [2021-11-02 23:12:24,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 23:12:24,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:24,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 23:12:24,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=921, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:12:24,988 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 32 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:28,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:28,359 INFO L93 Difference]: Finished difference Result 146 states and 160 transitions. [2021-11-02 23:12:28,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-02 23:12:28,360 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-02 23:12:28,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:28,360 INFO L225 Difference]: With dead ends: 146 [2021-11-02 23:12:28,360 INFO L226 Difference]: Without dead ends: 142 [2021-11-02 23:12:28,361 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=271, Invalid=4841, Unknown=0, NotChecked=0, Total=5112 [2021-11-02 23:12:28,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-02 23:12:28,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 63. [2021-11-02 23:12:28,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 62 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:28,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-11-02 23:12:28,760 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 35 [2021-11-02 23:12:28,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:28,760 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-11-02 23:12:28,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-11-02 23:12:28,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 23:12:28,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:28,761 INFO L513 BasicCegarLoop]: trace histogram [19, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:28,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:28,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-11-02 23:12:28,961 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:28,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:28,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1367460438, now seen corresponding path program 188 times [2021-11-02 23:12:28,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:28,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362938278] [2021-11-02 23:12:28,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:28,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:29,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:29,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362938278] [2021-11-02 23:12:29,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362938278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:29,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398535839] [2021-11-02 23:12:29,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:12:29,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:29,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:29,489 INFO L229 MonitoredProcess]: Starting monitored process 215 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:29,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2021-11-02 23:12:32,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:12:32,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:32,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-02 23:12:32,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:32,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398535839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:32,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:32,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-02 23:12:32,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647338236] [2021-11-02 23:12:32,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 23:12:32,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:32,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 23:12:32,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=922, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:12:32,912 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 32 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:36,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:36,403 INFO L93 Difference]: Finished difference Result 159 states and 173 transitions. [2021-11-02 23:12:36,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-02 23:12:36,404 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-02 23:12:36,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:36,404 INFO L225 Difference]: With dead ends: 159 [2021-11-02 23:12:36,404 INFO L226 Difference]: Without dead ends: 155 [2021-11-02 23:12:36,405 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=265, Invalid=4705, Unknown=0, NotChecked=0, Total=4970 [2021-11-02 23:12:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-02 23:12:36,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 63. [2021-11-02 23:12:36,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 62 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-11-02 23:12:36,807 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 35 [2021-11-02 23:12:36,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:36,807 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-11-02 23:12:36,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-11-02 23:12:36,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 23:12:36,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:36,807 INFO L513 BasicCegarLoop]: trace histogram [20, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:36,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:37,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-11-02 23:12:37,008 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:37,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:37,008 INFO L85 PathProgramCache]: Analyzing trace with hash 955016759, now seen corresponding path program 189 times [2021-11-02 23:12:37,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:37,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115269276] [2021-11-02 23:12:37,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:37,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:37,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:37,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115269276] [2021-11-02 23:12:37,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115269276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:37,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743006305] [2021-11-02 23:12:37,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:12:37,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:37,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:37,564 INFO L229 MonitoredProcess]: Starting monitored process 216 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:37,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a3cb7bc-7c95-424d-9946-8ea5d94b232e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process