./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:58:47,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:58:47,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:58:47,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:58:47,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:58:47,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:58:47,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:58:47,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:58:47,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:58:47,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:58:47,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:58:47,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:58:47,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:58:47,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:58:47,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:58:47,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:58:47,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:58:47,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:58:47,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:58:47,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:58:47,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:58:47,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:58:47,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:58:47,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:58:47,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:58:47,688 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:58:47,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:58:47,691 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:58:47,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:58:47,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:58:47,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:58:47,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:58:47,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:58:47,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:58:47,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:58:47,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:58:47,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:58:47,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:58:47,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:58:47,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:58:47,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:58:47,704 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:58:47,757 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:58:47,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:58:47,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:58:47,758 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:58:47,765 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:58:47,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:58:47,766 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:58:47,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:58:47,767 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:58:47,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:58:47,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:58:47,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:58:47,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:58:47,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:58:47,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:58:47,768 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:58:47,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:58:47,768 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:58:47,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:58:47,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:58:47,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:58:47,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:58:47,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:58:47,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:58:47,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:58:47,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:58:47,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:58:47,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:58:47,771 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:58:47,771 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:58:47,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:58:47,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:58:47,771 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_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 [2021-11-09 08:58:48,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:58:48,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:58:48,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:58:48,077 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:58:48,078 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:58:48,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2021-11-09 08:58:48,158 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/data/d8a99e8ef/57a37b9354b5479989e71c8bb0423aa9/FLAG61a57db88 [2021-11-09 08:58:48,576 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:58:48,577 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2021-11-09 08:58:48,585 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/data/d8a99e8ef/57a37b9354b5479989e71c8bb0423aa9/FLAG61a57db88 [2021-11-09 08:58:48,980 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/data/d8a99e8ef/57a37b9354b5479989e71c8bb0423aa9 [2021-11-09 08:58:48,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:58:48,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:58:48,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:58:48,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:58:49,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:58:49,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:58:48" (1/1) ... [2021-11-09 08:58:49,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41fc1f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:49, skipping insertion in model container [2021-11-09 08:58:49,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:58:48" (1/1) ... [2021-11-09 08:58:49,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:58:49,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:58:49,197 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_87468cd0-5487-4140-9018-47052d375482/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2021-11-09 08:58:49,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:58:49,237 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:58:49,251 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_87468cd0-5487-4140-9018-47052d375482/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2021-11-09 08:58:49,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:58:49,272 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:58:49,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:49 WrapperNode [2021-11-09 08:58:49,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:58:49,273 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:58:49,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:58:49,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:58:49,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:49" (1/1) ... [2021-11-09 08:58:49,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:49" (1/1) ... [2021-11-09 08:58:49,309 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:58:49,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:58:49,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:58:49,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:58:49,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:49" (1/1) ... [2021-11-09 08:58:49,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:49" (1/1) ... [2021-11-09 08:58:49,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:49" (1/1) ... [2021-11-09 08:58:49,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:49" (1/1) ... [2021-11-09 08:58:49,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:49" (1/1) ... [2021-11-09 08:58:49,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:49" (1/1) ... [2021-11-09 08:58:49,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:49" (1/1) ... [2021-11-09 08:58:49,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:58:49,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:58:49,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:58:49,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:58:49,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:49" (1/1) ... [2021-11-09 08:58:49,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:58:49,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:49,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:58:49,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:58:49,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:58:49,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:58:49,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:58:49,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:58:49,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:58:49,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:58:49,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:58:49,598 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:58:49,599 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-09 08:58:49,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:58:49 BoogieIcfgContainer [2021-11-09 08:58:49,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:58:49,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:58:49,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:58:49,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:58:49,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:58:48" (1/3) ... [2021-11-09 08:58:49,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629628c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:58:49, skipping insertion in model container [2021-11-09 08:58:49,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:49" (2/3) ... [2021-11-09 08:58:49,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629628c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:58:49, skipping insertion in model container [2021-11-09 08:58:49,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:58:49" (3/3) ... [2021-11-09 08:58:49,630 INFO L111 eAbstractionObserver]: Analyzing ICFG flag_loopdep_simple.i [2021-11-09 08:58:49,636 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:58:49,641 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:58:49,748 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:58:49,769 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 08:58:49,769 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:58:49,800 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:49,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 08:58:49,805 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:49,806 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:49,807 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:49,813 INFO L85 PathProgramCache]: Analyzing trace with hash -2060710478, now seen corresponding path program 1 times [2021-11-09 08:58:49,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:49,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358762567] [2021-11-09 08:58:49,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:49,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:50,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:50,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:50,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358762567] [2021-11-09 08:58:50,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358762567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:58:50,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:58:50,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:58:50,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019599628] [2021-11-09 08:58:50,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:58:50,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:50,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:58:50,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:50,064 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 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) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:50,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:50,107 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2021-11-09 08:58:50,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:58:50,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-09 08:58:50,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:50,120 INFO L225 Difference]: With dead ends: 38 [2021-11-09 08:58:50,120 INFO L226 Difference]: Without dead ends: 18 [2021-11-09 08:58:50,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:50,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-09 08:58:50,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-11-09 08:58:50,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 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) [2021-11-09 08:58:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-09 08:58:50,160 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2021-11-09 08:58:50,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:50,160 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-09 08:58:50,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:50,161 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-09 08:58:50,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 08:58:50,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:50,163 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:50,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:58:50,164 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:50,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:50,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1264138591, now seen corresponding path program 1 times [2021-11-09 08:58:50,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:50,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268994963] [2021-11-09 08:58:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:50,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:58:50,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:50,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268994963] [2021-11-09 08:58:50,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268994963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:58:50,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:58:50,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:58:50,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173781800] [2021-11-09 08:58:50,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:58:50,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:50,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:58:50,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:50,275 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:50,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:50,312 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-11-09 08:58:50,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:58:50,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-09 08:58:50,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:50,313 INFO L225 Difference]: With dead ends: 35 [2021-11-09 08:58:50,313 INFO L226 Difference]: Without dead ends: 27 [2021-11-09 08:58:50,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:50,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-09 08:58:50,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2021-11-09 08:58:50,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 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) [2021-11-09 08:58:50,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-09 08:58:50,319 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2021-11-09 08:58:50,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:50,319 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-09 08:58:50,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:50,320 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-09 08:58:50,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 08:58:50,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:50,321 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:50,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:58:50,321 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:50,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:50,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1458340319, now seen corresponding path program 1 times [2021-11-09 08:58:50,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:50,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985422435] [2021-11-09 08:58:50,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:50,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:58:50,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:50,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985422435] [2021-11-09 08:58:50,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985422435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:50,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065356724] [2021-11-09 08:58:50,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:50,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:50,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:50,400 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:50,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:58:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:50,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:58:50,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:58:50,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065356724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:58:50,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:58:50,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-09 08:58:50,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309573403] [2021-11-09 08:58:50,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:58:50,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:50,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:58:50,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:58:50,547 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-11-09 08:58:50,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:50,559 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-11-09 08:58:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:58:50,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 15 [2021-11-09 08:58:50,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:50,560 INFO L225 Difference]: With dead ends: 32 [2021-11-09 08:58:50,560 INFO L226 Difference]: Without dead ends: 18 [2021-11-09 08:58:50,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:58:50,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-09 08:58:50,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-09 08:58:50,564 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) [2021-11-09 08:58:50,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-09 08:58:50,565 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 15 [2021-11-09 08:58:50,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:50,565 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-09 08:58:50,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-11-09 08:58:50,566 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-09 08:58:50,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 08:58:50,567 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:50,567 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:50,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:50,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:50,783 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:50,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:50,783 INFO L85 PathProgramCache]: Analyzing trace with hash 2027280351, now seen corresponding path program 1 times [2021-11-09 08:58:50,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:50,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030831162] [2021-11-09 08:58:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:50,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:58:50,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:50,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030831162] [2021-11-09 08:58:50,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030831162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:50,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207894996] [2021-11-09 08:58:50,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:50,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:50,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:50,859 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:50,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:58:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:50,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:58:50,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:58:51,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207894996] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:51,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:51,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-09 08:58:51,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176091148] [2021-11-09 08:58:51,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:58:51,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:51,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:58:51,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:58:51,116 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:51,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:51,206 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-11-09 08:58:51,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:58:51,208 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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 15 [2021-11-09 08:58:51,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:51,210 INFO L225 Difference]: With dead ends: 53 [2021-11-09 08:58:51,210 INFO L226 Difference]: Without dead ends: 40 [2021-11-09 08:58:51,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:58:51,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-09 08:58:51,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-11-09 08:58:51,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:51,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-09 08:58:51,237 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2021-11-09 08:58:51,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:51,238 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-09 08:58:51,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:51,238 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-09 08:58:51,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 08:58:51,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:51,240 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:51,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-09 08:58:51,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:51,459 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:51,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:51,459 INFO L85 PathProgramCache]: Analyzing trace with hash -2139127327, now seen corresponding path program 2 times [2021-11-09 08:58:51,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:51,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770946212] [2021-11-09 08:58:51,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:51,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 08:58:51,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:51,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770946212] [2021-11-09 08:58:51,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770946212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:51,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472604294] [2021-11-09 08:58:51,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:58:51,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:51,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:51,547 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:51,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:58:51,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:58:51,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:51,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:58:51,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 08:58:51,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472604294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:51,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:51,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-09 08:58:51,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447836056] [2021-11-09 08:58:51,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:58:51,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:51,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:58:51,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:58:51,767 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:51,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:51,803 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-11-09 08:58:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:58:51,807 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 20 [2021-11-09 08:58:51,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:51,808 INFO L225 Difference]: With dead ends: 42 [2021-11-09 08:58:51,808 INFO L226 Difference]: Without dead ends: 26 [2021-11-09 08:58:51,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:58:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-09 08:58:51,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-09 08:58:51,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-09 08:58:51,812 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2021-11-09 08:58:51,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:51,813 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-09 08:58:51,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-09 08:58:51,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 08:58:51,814 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:51,814 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:51,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:52,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:52,040 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:52,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:52,040 INFO L85 PathProgramCache]: Analyzing trace with hash -331071005, now seen corresponding path program 3 times [2021-11-09 08:58:52,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:52,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396540894] [2021-11-09 08:58:52,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:52,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 08:58:52,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:52,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396540894] [2021-11-09 08:58:52,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396540894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:52,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851724557] [2021-11-09 08:58:52,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:58:52,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:52,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:52,122 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:52,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:58:52,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:58:52,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:52,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:58:52,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:58:52,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851724557] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:52,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:52,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-11-09 08:58:52,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472104356] [2021-11-09 08:58:52,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:58:52,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:52,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:58:52,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:58:52,298 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:52,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:52,396 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2021-11-09 08:58:52,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:58:52,397 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 22 [2021-11-09 08:58:52,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:52,398 INFO L225 Difference]: With dead ends: 70 [2021-11-09 08:58:52,398 INFO L226 Difference]: Without dead ends: 54 [2021-11-09 08:58:52,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:58:52,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-09 08:58:52,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 30. [2021-11-09 08:58:52,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:52,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-11-09 08:58:52,421 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2021-11-09 08:58:52,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:52,421 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-11-09 08:58:52,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:52,423 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-11-09 08:58:52,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 08:58:52,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:52,425 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:52,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-09 08:58:52,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 08:58:52,626 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:52,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:52,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1534672359, now seen corresponding path program 4 times [2021-11-09 08:58:52,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:52,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566899817] [2021-11-09 08:58:52,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:52,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:58:52,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:52,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566899817] [2021-11-09 08:58:52,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566899817] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:52,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028053451] [2021-11-09 08:58:52,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:58:52,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:52,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:52,723 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:52,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:58:52,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:58:52,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:52,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:58:52,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:52,934 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:58:52,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028053451] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:52,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:52,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-11-09 08:58:52,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826847872] [2021-11-09 08:58:52,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:58:52,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:52,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:58:52,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:58:52,937 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-11-09 08:58:53,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:53,012 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2021-11-09 08:58:53,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:58:53,012 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 27 [2021-11-09 08:58:53,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:53,013 INFO L225 Difference]: With dead ends: 85 [2021-11-09 08:58:53,014 INFO L226 Difference]: Without dead ends: 66 [2021-11-09 08:58:53,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:58:53,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-09 08:58:53,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 35. [2021-11-09 08:58:53,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-11-09 08:58:53,019 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 27 [2021-11-09 08:58:53,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:53,020 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-11-09 08:58:53,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-11-09 08:58:53,020 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-11-09 08:58:53,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 08:58:53,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:53,021 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:53,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:53,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 08:58:53,243 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:53,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:53,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1766720103, now seen corresponding path program 5 times [2021-11-09 08:58:53,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:53,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185599846] [2021-11-09 08:58:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:53,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 08:58:53,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:53,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185599846] [2021-11-09 08:58:53,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185599846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:53,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779766355] [2021-11-09 08:58:53,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:58:53,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:53,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:53,387 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:53,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:58:53,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 08:58:53,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:53,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:58:53,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:58:53,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779766355] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:53,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:53,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-11-09 08:58:53,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731360953] [2021-11-09 08:58:53,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:58:53,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:53,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:58:53,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:58:53,647 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:53,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:53,738 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-11-09 08:58:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:58:53,739 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 32 [2021-11-09 08:58:53,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:53,742 INFO L225 Difference]: With dead ends: 100 [2021-11-09 08:58:53,742 INFO L226 Difference]: Without dead ends: 78 [2021-11-09 08:58:53,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:58:53,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-09 08:58:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 40. [2021-11-09 08:58:53,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-11-09 08:58:53,752 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 32 [2021-11-09 08:58:53,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:53,753 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-11-09 08:58:53,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:53,753 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-11-09 08:58:53,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 08:58:53,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:53,754 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:53,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:53,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:53,976 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:53,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:53,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1089794667, now seen corresponding path program 6 times [2021-11-09 08:58:53,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:53,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010135167] [2021-11-09 08:58:53,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:53,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-09 08:58:54,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:54,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010135167] [2021-11-09 08:58:54,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010135167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:54,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450255197] [2021-11-09 08:58:54,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:58:54,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:54,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:54,157 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:54,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:58:54,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 08:58:54,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:54,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 08:58:54,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-09 08:58:54,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450255197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:54,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:54,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-11-09 08:58:54,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345523777] [2021-11-09 08:58:54,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 08:58:54,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:54,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 08:58:54,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:58:54,618 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:54,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:54,838 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2021-11-09 08:58:54,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 08:58:54,839 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) Word has length 37 [2021-11-09 08:58:54,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:54,840 INFO L225 Difference]: With dead ends: 77 [2021-11-09 08:58:54,840 INFO L226 Difference]: Without dead ends: 52 [2021-11-09 08:58:54,840 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-11-09 08:58:54,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-09 08:58:54,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-11-09 08:58:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:54,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-11-09 08:58:54,846 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 37 [2021-11-09 08:58:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:54,846 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-11-09 08:58:54,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:54,846 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-11-09 08:58:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 08:58:54,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:54,848 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:54,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:55,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:55,048 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:55,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:55,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1351978204, now seen corresponding path program 1 times [2021-11-09 08:58:55,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:55,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155119921] [2021-11-09 08:58:55,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:55,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-09 08:58:55,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:55,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155119921] [2021-11-09 08:58:55,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155119921] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:58:55,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:58:55,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:58:55,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930998107] [2021-11-09 08:58:55,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:58:55,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:55,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:58:55,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:55,146 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:55,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:55,150 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-11-09 08:58:55,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:58:55,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 42 [2021-11-09 08:58:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:55,154 INFO L225 Difference]: With dead ends: 52 [2021-11-09 08:58:55,154 INFO L226 Difference]: Without dead ends: 45 [2021-11-09 08:58:55,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-09 08:58:55,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-09 08:58:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-11-09 08:58:55,159 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2021-11-09 08:58:55,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:55,159 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-11-09 08:58:55,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:55,160 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-11-09 08:58:55,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 08:58:55,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:55,161 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:55,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 08:58:55,161 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:55,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:55,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2040020590, now seen corresponding path program 1 times [2021-11-09 08:58:55,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:55,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887959006] [2021-11-09 08:58:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:55,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-09 08:58:55,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:55,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887959006] [2021-11-09 08:58:55,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887959006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:55,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513437773] [2021-11-09 08:58:55,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:55,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:55,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:55,336 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:55,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:58:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:55,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 08:58:55,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-09 08:58:55,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513437773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:55,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:55,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-09 08:58:55,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584938412] [2021-11-09 08:58:55,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:58:55,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:55,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:58:55,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:58:55,747 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:55,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:55,783 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-11-09 08:58:55,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:58:55,784 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-09 08:58:55,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:55,785 INFO L225 Difference]: With dead ends: 76 [2021-11-09 08:58:55,785 INFO L226 Difference]: Without dead ends: 48 [2021-11-09 08:58:55,785 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:58:55,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-09 08:58:55,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-11-09 08:58:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:55,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-11-09 08:58:55,797 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2021-11-09 08:58:55,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:55,798 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-11-09 08:58:55,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:55,798 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-11-09 08:58:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 08:58:55,800 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:55,801 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:55,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:56,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:56,027 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:56,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:56,027 INFO L85 PathProgramCache]: Analyzing trace with hash 461215856, now seen corresponding path program 2 times [2021-11-09 08:58:56,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:56,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049494193] [2021-11-09 08:58:56,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:56,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:56,166 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-09 08:58:56,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:56,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049494193] [2021-11-09 08:58:56,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049494193] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:56,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896548781] [2021-11-09 08:58:56,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:58:56,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:56,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:56,168 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:56,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:58:56,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:58:56,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:56,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 08:58:56,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-09 08:58:56,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896548781] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:56,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:56,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-09 08:58:56,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308166032] [2021-11-09 08:58:56,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:58:56,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:56,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:58:56,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:58:56,673 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:56,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:56,720 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2021-11-09 08:58:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:58:56,721 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-09 08:58:56,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:56,722 INFO L225 Difference]: With dead ends: 78 [2021-11-09 08:58:56,722 INFO L226 Difference]: Without dead ends: 50 [2021-11-09 08:58:56,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:58:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-09 08:58:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-11-09 08:58:56,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-11-09 08:58:56,728 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2021-11-09 08:58:56,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:56,729 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-11-09 08:58:56,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-11-09 08:58:56,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 08:58:56,730 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:56,731 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:56,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:56,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:56,947 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:56,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:56,947 INFO L85 PathProgramCache]: Analyzing trace with hash -646678030, now seen corresponding path program 3 times [2021-11-09 08:58:56,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:56,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199104315] [2021-11-09 08:58:56,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:56,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-09 08:58:57,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:57,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199104315] [2021-11-09 08:58:57,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199104315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:57,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809542679] [2021-11-09 08:58:57,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:58:57,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:57,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:57,092 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:57,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:58:57,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 08:58:57,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:57,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:58:57,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-09 08:58:57,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809542679] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:57,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:57,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-11-09 08:58:57,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90558991] [2021-11-09 08:58:57,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:58:57,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:57,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:58:57,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:58:57,447 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:57,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:57,540 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2021-11-09 08:58:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:58:57,541 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-09 08:58:57,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:57,542 INFO L225 Difference]: With dead ends: 122 [2021-11-09 08:58:57,542 INFO L226 Difference]: Without dead ends: 94 [2021-11-09 08:58:57,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:58:57,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-09 08:58:57,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2021-11-09 08:58:57,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:57,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-11-09 08:58:57,555 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 48 [2021-11-09 08:58:57,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:57,555 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-11-09 08:58:57,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:57,556 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-11-09 08:58:57,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 08:58:57,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:57,558 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:57,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:57,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 08:58:57,771 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:57,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:57,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1330435568, now seen corresponding path program 4 times [2021-11-09 08:58:57,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:57,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902217337] [2021-11-09 08:58:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:57,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-09 08:58:57,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:57,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902217337] [2021-11-09 08:58:57,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902217337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:57,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510010837] [2021-11-09 08:58:57,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:58:57,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:57,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:57,958 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:57,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:58:58,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:58:58,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:58,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:58:58,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:58,352 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-09 08:58:58,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510010837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:58,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:58,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-11-09 08:58:58,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285742056] [2021-11-09 08:58:58,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:58:58,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:58,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:58:58,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:58:58,355 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:58,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:58,476 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2021-11-09 08:58:58,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 08:58:58,477 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-09 08:58:58,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:58,478 INFO L225 Difference]: With dead ends: 137 [2021-11-09 08:58:58,478 INFO L226 Difference]: Without dead ends: 106 [2021-11-09 08:58:58,479 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:58:58,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-09 08:58:58,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 59. [2021-11-09 08:58:58,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:58,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-11-09 08:58:58,485 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 53 [2021-11-09 08:58:58,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:58,485 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-11-09 08:58:58,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:58,486 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-11-09 08:58:58,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 08:58:58,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:58,487 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:58,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:58,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 08:58:58,703 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:58,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:58,703 INFO L85 PathProgramCache]: Analyzing trace with hash 2088027254, now seen corresponding path program 5 times [2021-11-09 08:58:58,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:58,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896323103] [2021-11-09 08:58:58,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:58,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 08:58:58,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:58,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896323103] [2021-11-09 08:58:58,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896323103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:58,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730029596] [2021-11-09 08:58:58,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:58:58,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:58,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:58,891 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:58,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:58:59,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-09 08:58:59,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:59,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 08:58:59,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-09 08:58:59,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730029596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:59,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:58:59,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-11-09 08:58:59,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809219316] [2021-11-09 08:58:59,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:58:59,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:59,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:58:59,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:58:59,425 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:59,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:59,551 INFO L93 Difference]: Finished difference Result 152 states and 157 transitions. [2021-11-09 08:58:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 08:58:59,552 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 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 58 [2021-11-09 08:58:59,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:59,555 INFO L225 Difference]: With dead ends: 152 [2021-11-09 08:58:59,555 INFO L226 Difference]: Without dead ends: 118 [2021-11-09 08:58:59,558 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:58:59,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-09 08:58:59,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 64. [2021-11-09 08:58:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:59,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-11-09 08:58:59,571 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 58 [2021-11-09 08:58:59,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:59,572 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-11-09 08:58:59,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:58:59,572 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-11-09 08:58:59,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 08:58:59,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:59,581 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:59,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:59,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 08:58:59,807 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:59,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:59,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1964209268, now seen corresponding path program 6 times [2021-11-09 08:58:59,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:59,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485984637] [2021-11-09 08:58:59,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:59,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-09 08:59:00,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:00,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485984637] [2021-11-09 08:59:00,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485984637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:00,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125166227] [2021-11-09 08:59:00,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:59:00,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:00,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:00,040 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:00,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:59:00,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-09 08:59:00,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:00,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 08:59:00,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-09 08:59:00,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125166227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:00,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:00,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-11-09 08:59:00,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911411544] [2021-11-09 08:59:00,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:59:00,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:00,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:59:00,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:59:00,644 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:00,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:00,837 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-11-09 08:59:00,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:59:00,838 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-09 08:59:00,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:00,839 INFO L225 Difference]: With dead ends: 113 [2021-11-09 08:59:00,839 INFO L226 Difference]: Without dead ends: 76 [2021-11-09 08:59:00,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-11-09 08:59:00,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-09 08:59:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2021-11-09 08:59:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-11-09 08:59:00,845 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 63 [2021-11-09 08:59:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:00,845 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-11-09 08:59:00,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-11-09 08:59:00,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-09 08:59:00,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:00,847 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:00,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:01,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 08:59:01,059 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:01,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:01,059 INFO L85 PathProgramCache]: Analyzing trace with hash 601482327, now seen corresponding path program 7 times [2021-11-09 08:59:01,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:01,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192294446] [2021-11-09 08:59:01,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:01,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-09 08:59:01,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:01,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192294446] [2021-11-09 08:59:01,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192294446] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:01,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609198000] [2021-11-09 08:59:01,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:59:01,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:01,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:01,319 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:01,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 08:59:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:01,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 08:59:01,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-09 08:59:02,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609198000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:02,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:02,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-11-09 08:59:02,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732287429] [2021-11-09 08:59:02,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 08:59:02,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:02,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 08:59:02,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:59:02,102 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:02,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:02,165 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2021-11-09 08:59:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 08:59:02,166 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-09 08:59:02,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:02,167 INFO L225 Difference]: With dead ends: 116 [2021-11-09 08:59:02,167 INFO L226 Difference]: Without dead ends: 74 [2021-11-09 08:59:02,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:59:02,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-09 08:59:02,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-11-09 08:59:02,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:02,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-11-09 08:59:02,173 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2021-11-09 08:59:02,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:02,173 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-11-09 08:59:02,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:02,174 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-11-09 08:59:02,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-09 08:59:02,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:02,175 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:02,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:02,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 08:59:02,403 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:02,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:02,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1946476505, now seen corresponding path program 8 times [2021-11-09 08:59:02,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:02,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746346455] [2021-11-09 08:59:02,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:02,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-09 08:59:02,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:02,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746346455] [2021-11-09 08:59:02,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746346455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:02,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976359619] [2021-11-09 08:59:02,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:59:02,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:02,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:02,638 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:02,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 08:59:02,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:59:02,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:02,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 08:59:02,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-09 08:59:03,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976359619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:03,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:03,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-11-09 08:59:03,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886572365] [2021-11-09 08:59:03,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 08:59:03,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:03,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 08:59:03,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2021-11-09 08:59:03,443 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:03,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:03,518 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2021-11-09 08:59:03,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 08:59:03,519 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-09 08:59:03,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:03,520 INFO L225 Difference]: With dead ends: 118 [2021-11-09 08:59:03,520 INFO L226 Difference]: Without dead ends: 76 [2021-11-09 08:59:03,521 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2021-11-09 08:59:03,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-09 08:59:03,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-11-09 08:59:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:03,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-11-09 08:59:03,531 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2021-11-09 08:59:03,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:03,532 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-11-09 08:59:03,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:03,532 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-11-09 08:59:03,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-09 08:59:03,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:03,537 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:03,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:03,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:03,751 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:03,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:03,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1700725467, now seen corresponding path program 9 times [2021-11-09 08:59:03,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:03,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547553802] [2021-11-09 08:59:03,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:03,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-09 08:59:04,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:04,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547553802] [2021-11-09 08:59:04,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547553802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:04,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331390167] [2021-11-09 08:59:04,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:59:04,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:04,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:04,020 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:04,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 08:59:04,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-09 08:59:04,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:04,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:59:04,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-09 08:59:04,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331390167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:04,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:04,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2021-11-09 08:59:04,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897793159] [2021-11-09 08:59:04,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 08:59:04,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:04,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 08:59:04,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:59:04,601 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 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) [2021-11-09 08:59:04,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:04,752 INFO L93 Difference]: Finished difference Result 176 states and 181 transitions. [2021-11-09 08:59:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 08:59:04,753 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 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) Word has length 74 [2021-11-09 08:59:04,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:04,754 INFO L225 Difference]: With dead ends: 176 [2021-11-09 08:59:04,754 INFO L226 Difference]: Without dead ends: 134 [2021-11-09 08:59:04,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:59:04,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-09 08:59:04,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 80. [2021-11-09 08:59:04,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:04,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-11-09 08:59:04,761 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 74 [2021-11-09 08:59:04,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:04,761 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-11-09 08:59:04,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 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) [2021-11-09 08:59:04,762 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-11-09 08:59:04,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 08:59:04,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:04,763 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 9, 9, 9, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:04,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:04,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:04,987 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:04,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:04,987 INFO L85 PathProgramCache]: Analyzing trace with hash 605502177, now seen corresponding path program 10 times [2021-11-09 08:59:04,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:04,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320689887] [2021-11-09 08:59:04,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:04,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:05,293 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-09 08:59:05,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:05,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320689887] [2021-11-09 08:59:05,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320689887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:05,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865102825] [2021-11-09 08:59:05,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:59:05,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:05,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:05,295 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:05,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 08:59:05,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:59:05,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:05,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 08:59:05,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-11-09 08:59:05,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865102825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:05,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:05,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2021-11-09 08:59:05,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260780994] [2021-11-09 08:59:05,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 08:59:05,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:05,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 08:59:05,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:59:05,909 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:06,065 INFO L93 Difference]: Finished difference Result 191 states and 196 transitions. [2021-11-09 08:59:06,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:59:06,066 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-09 08:59:06,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:06,067 INFO L225 Difference]: With dead ends: 191 [2021-11-09 08:59:06,067 INFO L226 Difference]: Without dead ends: 146 [2021-11-09 08:59:06,068 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:59:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-09 08:59:06,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 85. [2021-11-09 08:59:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:06,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2021-11-09 08:59:06,074 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 79 [2021-11-09 08:59:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:06,074 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2021-11-09 08:59:06,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2021-11-09 08:59:06,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-09 08:59:06,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:06,075 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 10, 10, 10, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:06,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:06,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:06,301 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:06,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:06,301 INFO L85 PathProgramCache]: Analyzing trace with hash -956491937, now seen corresponding path program 11 times [2021-11-09 08:59:06,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:06,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475511117] [2021-11-09 08:59:06,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:06,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-11-09 08:59:06,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:06,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475511117] [2021-11-09 08:59:06,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475511117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:06,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421031956] [2021-11-09 08:59:06,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:59:06,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:06,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:06,607 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:06,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 08:59:07,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-09 08:59:07,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:07,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 08:59:07,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-11-09 08:59:07,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421031956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:07,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:07,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 31 [2021-11-09 08:59:07,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287158085] [2021-11-09 08:59:07,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 08:59:07,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:07,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 08:59:07,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:59:07,366 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:07,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:07,532 INFO L93 Difference]: Finished difference Result 206 states and 211 transitions. [2021-11-09 08:59:07,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 08:59:07,532 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-09 08:59:07,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:07,533 INFO L225 Difference]: With dead ends: 206 [2021-11-09 08:59:07,533 INFO L226 Difference]: Without dead ends: 158 [2021-11-09 08:59:07,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:59:07,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-09 08:59:07,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2021-11-09 08:59:07,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:07,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2021-11-09 08:59:07,540 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 84 [2021-11-09 08:59:07,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:07,540 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2021-11-09 08:59:07,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:07,541 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2021-11-09 08:59:07,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-09 08:59:07,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:07,542 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 11, 11, 11, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:07,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:07,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:07,759 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:07,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:07,759 INFO L85 PathProgramCache]: Analyzing trace with hash 251556445, now seen corresponding path program 12 times [2021-11-09 08:59:07,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:07,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760113671] [2021-11-09 08:59:07,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:07,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-09 08:59:08,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:08,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760113671] [2021-11-09 08:59:08,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760113671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:08,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56934369] [2021-11-09 08:59:08,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:59:08,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:08,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:08,131 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:08,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 08:59:08,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-09 08:59:08,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:08,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 08:59:08,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2021-11-09 08:59:09,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56934369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:09,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:09,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2021-11-09 08:59:09,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664155205] [2021-11-09 08:59:09,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 08:59:09,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:09,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 08:59:09,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:59:09,271 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:09,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:09,512 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2021-11-09 08:59:09,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 08:59:09,516 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-09 08:59:09,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:09,517 INFO L225 Difference]: With dead ends: 153 [2021-11-09 08:59:09,517 INFO L226 Difference]: Without dead ends: 102 [2021-11-09 08:59:09,517 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 08:59:09,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-09 08:59:09,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2021-11-09 08:59:09,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:09,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2021-11-09 08:59:09,525 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 89 [2021-11-09 08:59:09,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:09,525 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2021-11-09 08:59:09,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:09,526 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2021-11-09 08:59:09,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-09 08:59:09,527 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:09,527 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 11, 11, 11, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:09,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:09,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 08:59:09,739 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:09,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:09,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1233500582, now seen corresponding path program 13 times [2021-11-09 08:59:09,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:09,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252171529] [2021-11-09 08:59:09,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:09,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-09 08:59:10,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:10,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252171529] [2021-11-09 08:59:10,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252171529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:10,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634473707] [2021-11-09 08:59:10,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:59:10,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:10,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:10,115 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:10,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 08:59:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:10,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 08:59:10,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-09 08:59:11,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634473707] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:11,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:11,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-11-09 08:59:11,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557510615] [2021-11-09 08:59:11,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 08:59:11,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:11,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 08:59:11,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 08:59:11,460 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:11,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:11,525 INFO L93 Difference]: Finished difference Result 156 states and 160 transitions. [2021-11-09 08:59:11,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 08:59:11,541 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-09 08:59:11,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:11,542 INFO L225 Difference]: With dead ends: 156 [2021-11-09 08:59:11,542 INFO L226 Difference]: Without dead ends: 100 [2021-11-09 08:59:11,543 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 08:59:11,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-09 08:59:11,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-11-09 08:59:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:11,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2021-11-09 08:59:11,549 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2021-11-09 08:59:11,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:11,549 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2021-11-09 08:59:11,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:11,549 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2021-11-09 08:59:11,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 08:59:11,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:11,551 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 11, 11, 11, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:11,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:11,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 08:59:11,778 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:11,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:11,778 INFO L85 PathProgramCache]: Analyzing trace with hash -272140632, now seen corresponding path program 14 times [2021-11-09 08:59:11,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:11,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875034615] [2021-11-09 08:59:11,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:11,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:11,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-09 08:59:12,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:12,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875034615] [2021-11-09 08:59:12,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875034615] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:12,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734989336] [2021-11-09 08:59:12,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:59:12,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:12,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:12,165 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:12,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 08:59:12,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:59:12,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:12,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 08:59:12,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-09 08:59:13,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734989336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:13,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:13,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2021-11-09 08:59:13,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262719638] [2021-11-09 08:59:13,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 08:59:13,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:13,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 08:59:13,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 08:59:13,497 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:13,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:13,558 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2021-11-09 08:59:13,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:59:13,567 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-09 08:59:13,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:13,568 INFO L225 Difference]: With dead ends: 158 [2021-11-09 08:59:13,568 INFO L226 Difference]: Without dead ends: 102 [2021-11-09 08:59:13,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 08:59:13,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-09 08:59:13,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-11-09 08:59:13,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:13,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2021-11-09 08:59:13,574 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2021-11-09 08:59:13,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:13,574 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2021-11-09 08:59:13,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:13,575 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2021-11-09 08:59:13,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-09 08:59:13,576 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:13,576 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 11, 11, 11, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:13,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:13,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 08:59:13,791 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:13,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:13,791 INFO L85 PathProgramCache]: Analyzing trace with hash 210631466, now seen corresponding path program 15 times [2021-11-09 08:59:13,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:13,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62890112] [2021-11-09 08:59:13,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:13,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-09 08:59:14,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:14,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62890112] [2021-11-09 08:59:14,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62890112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:14,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686355995] [2021-11-09 08:59:14,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:59:14,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:14,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:14,198 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:14,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 08:59:14,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-09 08:59:14,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:14,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:59:14,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-11-09 08:59:15,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686355995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:15,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:15,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14] total 36 [2021-11-09 08:59:15,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394464895] [2021-11-09 08:59:15,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 08:59:15,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:15,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 08:59:15,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:59:15,087 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:15,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:15,256 INFO L93 Difference]: Finished difference Result 230 states and 235 transitions. [2021-11-09 08:59:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 08:59:15,256 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-09 08:59:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:15,257 INFO L225 Difference]: With dead ends: 230 [2021-11-09 08:59:15,257 INFO L226 Difference]: Without dead ends: 174 [2021-11-09 08:59:15,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:59:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-09 08:59:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 106. [2021-11-09 08:59:15,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 105 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:15,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2021-11-09 08:59:15,276 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 100 [2021-11-09 08:59:15,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:15,276 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2021-11-09 08:59:15,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:15,277 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2021-11-09 08:59:15,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-09 08:59:15,277 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:15,277 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 12, 12, 12, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:15,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-09 08:59:15,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 08:59:15,478 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:15,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:15,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1180537624, now seen corresponding path program 16 times [2021-11-09 08:59:15,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:15,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763816544] [2021-11-09 08:59:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:15,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-11-09 08:59:15,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:15,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763816544] [2021-11-09 08:59:15,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763816544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:15,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182570502] [2021-11-09 08:59:15,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:59:15,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:15,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:15,919 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:15,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 08:59:16,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:59:16,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:16,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:59:16,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2021-11-09 08:59:16,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182570502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:16,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:16,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 38 [2021-11-09 08:59:16,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482851375] [2021-11-09 08:59:16,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 08:59:16,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:16,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 08:59:16,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:59:16,977 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 38 states, 38 states have (on average 2.6842105263157894) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:17,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:17,172 INFO L93 Difference]: Finished difference Result 245 states and 250 transitions. [2021-11-09 08:59:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 08:59:17,172 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6842105263157894) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-09 08:59:17,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:17,173 INFO L225 Difference]: With dead ends: 245 [2021-11-09 08:59:17,173 INFO L226 Difference]: Without dead ends: 186 [2021-11-09 08:59:17,174 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:59:17,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-09 08:59:17,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 111. [2021-11-09 08:59:17,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:17,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-11-09 08:59:17,180 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 105 [2021-11-09 08:59:17,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:17,180 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-11-09 08:59:17,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6842105263157894) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-11-09 08:59:17,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-09 08:59:17,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:17,182 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 13, 13, 13, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:17,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-09 08:59:17,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:17,403 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:17,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:17,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1538188882, now seen corresponding path program 17 times [2021-11-09 08:59:17,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:17,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870156493] [2021-11-09 08:59:17,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:17,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2021-11-09 08:59:17,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:17,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870156493] [2021-11-09 08:59:17,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870156493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:17,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375044989] [2021-11-09 08:59:17,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:59:17,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:17,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:17,879 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:17,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 08:59:19,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-09 08:59:19,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:19,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 08:59:19,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-11-09 08:59:19,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375044989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:19,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:19,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16] total 40 [2021-11-09 08:59:19,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038339814] [2021-11-09 08:59:19,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 08:59:19,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:19,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 08:59:19,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 08:59:19,732 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 40 states, 40 states have (on average 2.675) internal successors, (107), 40 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:19,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:19,922 INFO L93 Difference]: Finished difference Result 260 states and 265 transitions. [2021-11-09 08:59:19,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 08:59:19,922 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.675) internal successors, (107), 40 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-09 08:59:19,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:19,924 INFO L225 Difference]: With dead ends: 260 [2021-11-09 08:59:19,924 INFO L226 Difference]: Without dead ends: 198 [2021-11-09 08:59:19,925 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 08:59:19,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-09 08:59:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 116. [2021-11-09 08:59:19,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2021-11-09 08:59:19,932 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 110 [2021-11-09 08:59:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:19,932 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2021-11-09 08:59:19,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.675) internal successors, (107), 40 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:19,946 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2021-11-09 08:59:19,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-09 08:59:19,946 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:19,947 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 14, 14, 14, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:19,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:20,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:20,169 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:20,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:20,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1240768364, now seen corresponding path program 18 times [2021-11-09 08:59:20,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:20,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482775930] [2021-11-09 08:59:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:20,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2021-11-09 08:59:20,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:20,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482775930] [2021-11-09 08:59:20,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482775930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:20,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347576189] [2021-11-09 08:59:20,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:59:20,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:20,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:20,659 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:20,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 08:59:22,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-11-09 08:59:22,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:22,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 08:59:22,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2021-11-09 08:59:22,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347576189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:22,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:22,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13] total 38 [2021-11-09 08:59:22,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690316907] [2021-11-09 08:59:22,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 08:59:22,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:22,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 08:59:22,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1025, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:59:22,920 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 38 states, 38 states have (on average 2.710526315789474) internal successors, (103), 38 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:23,232 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2021-11-09 08:59:23,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 08:59:23,234 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.710526315789474) internal successors, (103), 38 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-09 08:59:23,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:23,235 INFO L225 Difference]: With dead ends: 193 [2021-11-09 08:59:23,235 INFO L226 Difference]: Without dead ends: 128 [2021-11-09 08:59:23,236 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=396, Invalid=1244, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 08:59:23,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-09 08:59:23,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2021-11-09 08:59:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:23,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2021-11-09 08:59:23,243 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 115 [2021-11-09 08:59:23,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:23,244 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2021-11-09 08:59:23,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.710526315789474) internal successors, (103), 38 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:23,244 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2021-11-09 08:59:23,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-09 08:59:23,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:23,245 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 14, 14, 14, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:23,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-09 08:59:23,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 08:59:23,459 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:23,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:23,459 INFO L85 PathProgramCache]: Analyzing trace with hash 528635727, now seen corresponding path program 19 times [2021-11-09 08:59:23,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:23,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772664159] [2021-11-09 08:59:23,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:23,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-11-09 08:59:23,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:23,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772664159] [2021-11-09 08:59:23,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772664159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:23,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095967132] [2021-11-09 08:59:23,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:59:23,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:23,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:23,951 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:23,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 08:59:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:24,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 08:59:24,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-11-09 08:59:25,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095967132] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:25,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:25,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-11-09 08:59:25,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396383439] [2021-11-09 08:59:25,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-09 08:59:25,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:25,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-09 08:59:25,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 08:59:25,688 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:25,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:25,784 INFO L93 Difference]: Finished difference Result 196 states and 200 transitions. [2021-11-09 08:59:25,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:59:25,785 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-09 08:59:25,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:25,786 INFO L225 Difference]: With dead ends: 196 [2021-11-09 08:59:25,786 INFO L226 Difference]: Without dead ends: 126 [2021-11-09 08:59:25,787 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 08:59:25,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-09 08:59:25,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-11-09 08:59:25,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:25,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2021-11-09 08:59:25,795 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 122 [2021-11-09 08:59:25,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:25,795 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2021-11-09 08:59:25,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:25,796 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2021-11-09 08:59:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-09 08:59:25,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:25,797 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 14, 14, 14, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:25,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:26,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 08:59:26,016 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:26,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:26,016 INFO L85 PathProgramCache]: Analyzing trace with hash -763103791, now seen corresponding path program 20 times [2021-11-09 08:59:26,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:26,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144192357] [2021-11-09 08:59:26,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:26,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-11-09 08:59:26,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:26,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144192357] [2021-11-09 08:59:26,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144192357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:26,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587048751] [2021-11-09 08:59:26,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:59:26,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:26,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:26,535 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:26,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 08:59:27,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:59:27,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:27,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 08:59:27,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-11-09 08:59:28,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587048751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:28,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:28,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2021-11-09 08:59:28,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790248476] [2021-11-09 08:59:28,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-09 08:59:28,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:28,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-09 08:59:28,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 08:59:28,589 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 56 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 56 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:28,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:28,669 INFO L93 Difference]: Finished difference Result 198 states and 202 transitions. [2021-11-09 08:59:28,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:59:28,670 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 56 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-09 08:59:28,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:28,671 INFO L225 Difference]: With dead ends: 198 [2021-11-09 08:59:28,671 INFO L226 Difference]: Without dead ends: 128 [2021-11-09 08:59:28,672 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 08:59:28,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-09 08:59:28,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-11-09 08:59:28,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2021-11-09 08:59:28,679 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 124 [2021-11-09 08:59:28,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:28,680 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2021-11-09 08:59:28,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 56 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:28,680 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2021-11-09 08:59:28,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-09 08:59:28,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:28,681 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 14, 14, 14, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:28,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:28,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:28,887 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:28,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:28,887 INFO L85 PathProgramCache]: Analyzing trace with hash -879232045, now seen corresponding path program 21 times [2021-11-09 08:59:28,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:28,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551555904] [2021-11-09 08:59:28,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:28,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:29,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-11-09 08:59:29,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:29,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551555904] [2021-11-09 08:59:29,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551555904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:29,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35042891] [2021-11-09 08:59:29,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:59:29,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:29,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:29,429 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:29,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 08:59:30,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-09 08:59:30,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:30,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:59:30,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2021-11-09 08:59:30,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35042891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:30,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:30,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17] total 45 [2021-11-09 08:59:30,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048675168] [2021-11-09 08:59:30,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-09 08:59:30,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:30,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-09 08:59:30,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 08:59:30,833 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 45 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:31,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:31,017 INFO L93 Difference]: Finished difference Result 284 states and 289 transitions. [2021-11-09 08:59:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 08:59:31,018 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 45 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-09 08:59:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:31,019 INFO L225 Difference]: With dead ends: 284 [2021-11-09 08:59:31,019 INFO L226 Difference]: Without dead ends: 214 [2021-11-09 08:59:31,020 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 08:59:31,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-09 08:59:31,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 132. [2021-11-09 08:59:31,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2021-11-09 08:59:31,027 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 126 [2021-11-09 08:59:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:31,027 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2021-11-09 08:59:31,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 45 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:31,028 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2021-11-09 08:59:31,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-09 08:59:31,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:31,029 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 15, 15, 15, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:31,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-09 08:59:31,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:31,231 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:31,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:31,231 INFO L85 PathProgramCache]: Analyzing trace with hash -935507031, now seen corresponding path program 22 times [2021-11-09 08:59:31,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:31,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339644947] [2021-11-09 08:59:31,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:31,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2021-11-09 08:59:31,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:31,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339644947] [2021-11-09 08:59:31,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339644947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:31,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544731060] [2021-11-09 08:59:31,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:59:31,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:31,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:31,787 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:31,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 08:59:32,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:59:32,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:32,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 08:59:32,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2021-11-09 08:59:33,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544731060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:33,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:33,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 18] total 47 [2021-11-09 08:59:33,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380461072] [2021-11-09 08:59:33,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-09 08:59:33,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:33,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-09 08:59:33,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 08:59:33,134 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 47 states, 47 states have (on average 2.617021276595745) internal successors, (123), 47 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:33,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:33,364 INFO L93 Difference]: Finished difference Result 299 states and 304 transitions. [2021-11-09 08:59:33,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 08:59:33,364 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.617021276595745) internal successors, (123), 47 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-09 08:59:33,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:33,366 INFO L225 Difference]: With dead ends: 299 [2021-11-09 08:59:33,366 INFO L226 Difference]: Without dead ends: 226 [2021-11-09 08:59:33,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 08:59:33,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-09 08:59:33,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 137. [2021-11-09 08:59:33,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:33,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2021-11-09 08:59:33,378 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 131 [2021-11-09 08:59:33,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:33,378 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2021-11-09 08:59:33,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.617021276595745) internal successors, (123), 47 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:33,379 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2021-11-09 08:59:33,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-09 08:59:33,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:33,380 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 16, 16, 16, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:33,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:33,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-09 08:59:33,598 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:33,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:33,598 INFO L85 PathProgramCache]: Analyzing trace with hash -739810217, now seen corresponding path program 23 times [2021-11-09 08:59:33,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:33,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012403722] [2021-11-09 08:59:33,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:33,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1259 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2021-11-09 08:59:34,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:34,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012403722] [2021-11-09 08:59:34,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012403722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:34,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775270532] [2021-11-09 08:59:34,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:59:34,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:34,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:34,255 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:34,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 08:59:36,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-11-09 08:59:36,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:36,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 08:59:36,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1259 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2021-11-09 08:59:36,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775270532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:36,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:36,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 19] total 49 [2021-11-09 08:59:36,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247486046] [2021-11-09 08:59:36,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 08:59:36,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:36,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 08:59:36,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=1686, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 08:59:36,751 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 49 states, 49 states have (on average 2.6122448979591835) internal successors, (128), 49 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:36,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:36,977 INFO L93 Difference]: Finished difference Result 314 states and 319 transitions. [2021-11-09 08:59:36,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-09 08:59:36,977 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.6122448979591835) internal successors, (128), 49 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-09 08:59:36,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:36,979 INFO L225 Difference]: With dead ends: 314 [2021-11-09 08:59:36,979 INFO L226 Difference]: Without dead ends: 238 [2021-11-09 08:59:36,980 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=1686, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 08:59:36,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-09 08:59:36,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 142. [2021-11-09 08:59:36,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:36,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2021-11-09 08:59:36,989 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 136 [2021-11-09 08:59:36,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:36,990 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2021-11-09 08:59:36,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.6122448979591835) internal successors, (128), 49 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:36,990 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2021-11-09 08:59:36,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-09 08:59:36,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:36,991 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 17, 17, 17, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:37,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:37,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-09 08:59:37,211 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:37,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:37,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1877634853, now seen corresponding path program 24 times [2021-11-09 08:59:37,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:37,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492351109] [2021-11-09 08:59:37,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:37,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2021-11-09 08:59:37,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:37,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492351109] [2021-11-09 08:59:37,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492351109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:37,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97605196] [2021-11-09 08:59:37,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:59:37,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:37,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:37,842 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:37,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 08:59:43,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-11-09 08:59:43,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:43,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 08:59:43,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2021-11-09 08:59:43,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97605196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:43,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:43,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 15] total 46 [2021-11-09 08:59:43,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334060963] [2021-11-09 08:59:43,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 08:59:43,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:43,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 08:59:43,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=564, Invalid=1506, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 08:59:43,974 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:44,311 INFO L93 Difference]: Finished difference Result 233 states and 238 transitions. [2021-11-09 08:59:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 08:59:44,312 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-09 08:59:44,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:44,313 INFO L225 Difference]: With dead ends: 233 [2021-11-09 08:59:44,313 INFO L226 Difference]: Without dead ends: 154 [2021-11-09 08:59:44,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 08:59:44,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-09 08:59:44,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 149. [2021-11-09 08:59:44,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2021-11-09 08:59:44,321 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 141 [2021-11-09 08:59:44,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:44,321 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2021-11-09 08:59:44,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:44,321 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2021-11-09 08:59:44,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-09 08:59:44,322 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:44,322 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 17, 17, 17, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:44,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:44,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 08:59:44,522 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:44,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:44,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1612833570, now seen corresponding path program 25 times [2021-11-09 08:59:44,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:44,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555141879] [2021-11-09 08:59:44,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:44,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-09 08:59:45,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:45,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555141879] [2021-11-09 08:59:45,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555141879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:45,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889200160] [2021-11-09 08:59:45,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:59:45,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:45,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:45,170 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:45,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 08:59:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:46,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 08:59:46,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-09 08:59:47,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889200160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:47,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:47,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-11-09 08:59:47,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500567555] [2021-11-09 08:59:47,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-09 08:59:47,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:47,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-09 08:59:47,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 08:59:47,610 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 66 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 66 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:47,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:47,773 INFO L93 Difference]: Finished difference Result 236 states and 240 transitions. [2021-11-09 08:59:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 08:59:47,774 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 66 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-09 08:59:47,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:47,775 INFO L225 Difference]: With dead ends: 236 [2021-11-09 08:59:47,775 INFO L226 Difference]: Without dead ends: 152 [2021-11-09 08:59:47,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 08:59:47,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-09 08:59:47,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-11-09 08:59:47,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.02) internal successors, (153), 150 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:47,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2021-11-09 08:59:47,803 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 148 [2021-11-09 08:59:47,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:47,803 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2021-11-09 08:59:47,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 66 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:47,804 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2021-11-09 08:59:47,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-09 08:59:47,805 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:47,805 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 17, 17, 17, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:47,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:48,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:48,018 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:48,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:48,018 INFO L85 PathProgramCache]: Analyzing trace with hash -954155808, now seen corresponding path program 26 times [2021-11-09 08:59:48,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:48,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278793047] [2021-11-09 08:59:48,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:48,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-09 08:59:48,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:48,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278793047] [2021-11-09 08:59:48,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278793047] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:48,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781362889] [2021-11-09 08:59:48,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:59:48,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:48,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:48,702 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:48,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 08:59:49,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:59:49,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:49,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 08:59:49,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-09 08:59:51,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781362889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:51,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:51,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2021-11-09 08:59:51,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641448015] [2021-11-09 08:59:51,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-09 08:59:51,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:51,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-09 08:59:51,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 08:59:51,410 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 68 states, 68 states have (on average 2.1470588235294117) internal successors, (146), 68 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:51,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:51,508 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2021-11-09 08:59:51,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 08:59:51,509 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1470588235294117) internal successors, (146), 68 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-09 08:59:51,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:51,510 INFO L225 Difference]: With dead ends: 238 [2021-11-09 08:59:51,510 INFO L226 Difference]: Without dead ends: 154 [2021-11-09 08:59:51,510 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 08:59:51,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-09 08:59:51,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-11-09 08:59:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:51,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2021-11-09 08:59:51,520 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 150 [2021-11-09 08:59:51,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:51,520 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2021-11-09 08:59:51,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1470588235294117) internal successors, (146), 68 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:51,521 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2021-11-09 08:59:51,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-09 08:59:51,522 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:51,522 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 17, 17, 17, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:51,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-09 08:59:51,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 08:59:51,747 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:51,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:51,747 INFO L85 PathProgramCache]: Analyzing trace with hash 674980962, now seen corresponding path program 27 times [2021-11-09 08:59:51,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:51,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202472939] [2021-11-09 08:59:51,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:51,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-09 08:59:52,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:52,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202472939] [2021-11-09 08:59:52,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202472939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:52,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555776103] [2021-11-09 08:59:52,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:59:52,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:52,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:52,451 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:52,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 08:59:53,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-09 08:59:53,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:53,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 08:59:53,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1154 trivial. 0 not checked. [2021-11-09 08:59:54,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555776103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:54,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:54,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 20] total 54 [2021-11-09 08:59:54,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596963366] [2021-11-09 08:59:54,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-09 08:59:54,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:54,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-09 08:59:54,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=819, Invalid=2043, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 08:59:54,460 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand has 54 states, 54 states have (on average 2.574074074074074) internal successors, (139), 54 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:54,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:54,690 INFO L93 Difference]: Finished difference Result 338 states and 343 transitions. [2021-11-09 08:59:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-09 08:59:54,691 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.574074074074074) internal successors, (139), 54 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-09 08:59:54,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:54,692 INFO L225 Difference]: With dead ends: 338 [2021-11-09 08:59:54,692 INFO L226 Difference]: Without dead ends: 254 [2021-11-09 08:59:54,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=819, Invalid=2043, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 08:59:54,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-09 08:59:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 158. [2021-11-09 08:59:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.019108280254777) internal successors, (160), 157 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2021-11-09 08:59:54,710 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 152 [2021-11-09 08:59:54,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:54,710 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2021-11-09 08:59:54,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.574074074074074) internal successors, (139), 54 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:54,711 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2021-11-09 08:59:54,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-09 08:59:54,711 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:54,711 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 18, 18, 18, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:54,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:54,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-09 08:59:54,912 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:54,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:54,912 INFO L85 PathProgramCache]: Analyzing trace with hash -191544288, now seen corresponding path program 28 times [2021-11-09 08:59:54,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:54,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992566546] [2021-11-09 08:59:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:54,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2021-11-09 08:59:55,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:55,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992566546] [2021-11-09 08:59:55,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992566546] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:55,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564960100] [2021-11-09 08:59:55,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:59:55,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:55,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:55,762 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:55,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 08:59:56,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:59:56,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:59:56,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 08:59:56,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 1221 trivial. 0 not checked. [2021-11-09 08:59:57,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564960100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:57,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:59:57,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 21] total 56 [2021-11-09 08:59:57,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979666174] [2021-11-09 08:59:57,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-09 08:59:57,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:59:57,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-09 08:59:57,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=2205, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 08:59:57,549 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand has 56 states, 56 states have (on average 2.5714285714285716) internal successors, (144), 56 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:57,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:59:57,774 INFO L93 Difference]: Finished difference Result 353 states and 358 transitions. [2021-11-09 08:59:57,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-09 08:59:57,775 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.5714285714285716) internal successors, (144), 56 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-11-09 08:59:57,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:59:57,776 INFO L225 Difference]: With dead ends: 353 [2021-11-09 08:59:57,776 INFO L226 Difference]: Without dead ends: 266 [2021-11-09 08:59:57,777 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=875, Invalid=2205, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 08:59:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-09 08:59:57,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 163. [2021-11-09 08:59:57,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:57,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2021-11-09 08:59:57,788 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 157 [2021-11-09 08:59:57,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:59:57,788 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2021-11-09 08:59:57,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.5714285714285716) internal successors, (144), 56 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:59:57,788 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2021-11-09 08:59:57,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-09 08:59:57,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:59:57,790 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 19, 19, 19, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:59:57,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 08:59:58,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 08:59:58,008 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:59:58,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:59:58,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2107746586, now seen corresponding path program 29 times [2021-11-09 08:59:58,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:59:58,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837481833] [2021-11-09 08:59:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:59:58,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:59:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:59:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1822 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2021-11-09 08:59:58,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:59:58,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837481833] [2021-11-09 08:59:58,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837481833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:59:58,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933148285] [2021-11-09 08:59:58,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:59:58,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:59:58,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:59:58,865 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:59:58,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 09:00:01,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-11-09 09:00:01,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:00:01,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:00:01,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:00:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1822 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2021-11-09 09:00:01,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933148285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:01,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:00:01,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 22] total 58 [2021-11-09 09:00:01,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492651096] [2021-11-09 09:00:01,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-09 09:00:01,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:00:01,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-09 09:00:01,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=933, Invalid=2373, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 09:00:01,899 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 58 states, 58 states have (on average 2.5689655172413794) internal successors, (149), 58 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:02,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:00:02,190 INFO L93 Difference]: Finished difference Result 368 states and 373 transitions. [2021-11-09 09:00:02,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-09 09:00:02,190 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.5689655172413794) internal successors, (149), 58 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-11-09 09:00:02,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:00:02,192 INFO L225 Difference]: With dead ends: 368 [2021-11-09 09:00:02,192 INFO L226 Difference]: Without dead ends: 278 [2021-11-09 09:00:02,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=933, Invalid=2373, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 09:00:02,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-09 09:00:02,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 168. [2021-11-09 09:00:02,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0179640718562875) internal successors, (170), 167 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:02,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2021-11-09 09:00:02,206 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 162 [2021-11-09 09:00:02,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:00:02,207 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2021-11-09 09:00:02,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.5689655172413794) internal successors, (149), 58 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:02,207 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2021-11-09 09:00:02,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-09 09:00:02,208 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:00:02,208 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 20, 20, 20, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:00:02,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 09:00:02,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 09:00:02,423 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:00:02,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:00:02,423 INFO L85 PathProgramCache]: Analyzing trace with hash -493191780, now seen corresponding path program 30 times [2021-11-09 09:00:02,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:00:02,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671612930] [2021-11-09 09:00:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:00:02,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:00:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:00:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2021-11-09 09:00:03,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:00:03,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671612930] [2021-11-09 09:00:03,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671612930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:03,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228163732] [2021-11-09 09:00:03,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:00:03,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:03,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:00:03,328 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:00:03,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 09:00:12,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2021-11-09 09:00:12,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:00:12,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 09:00:12,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:00:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 689 refuted. 0 times theorem prover too weak. 1262 trivial. 0 not checked. [2021-11-09 09:00:13,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228163732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:13,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:00:13,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 22] total 59 [2021-11-09 09:00:13,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984931171] [2021-11-09 09:00:13,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-09 09:00:13,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:00:13,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-09 09:00:13,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=794, Invalid=2628, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 09:00:13,710 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 59 states, 59 states have (on average 2.593220338983051) internal successors, (153), 59 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:14,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:00:14,291 INFO L93 Difference]: Finished difference Result 273 states and 278 transitions. [2021-11-09 09:00:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-09 09:00:14,292 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.593220338983051) internal successors, (153), 59 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-11-09 09:00:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:00:14,293 INFO L225 Difference]: With dead ends: 273 [2021-11-09 09:00:14,293 INFO L226 Difference]: Without dead ends: 180 [2021-11-09 09:00:14,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=959, Invalid=3331, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 09:00:14,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-09 09:00:14,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 175. [2021-11-09 09:00:14,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0172413793103448) internal successors, (177), 174 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:14,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2021-11-09 09:00:14,308 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 167 [2021-11-09 09:00:14,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:00:14,309 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2021-11-09 09:00:14,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.593220338983051) internal successors, (153), 59 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:14,309 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2021-11-09 09:00:14,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-09 09:00:14,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:00:14,310 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 20, 20, 20, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:00:14,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 09:00:14,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 09:00:14,531 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:00:14,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:00:14,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1405878855, now seen corresponding path program 31 times [2021-11-09 09:00:14,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:00:14,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199670408] [2021-11-09 09:00:14,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:00:14,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:00:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:00:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2052 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2021-11-09 09:00:15,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:00:15,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199670408] [2021-11-09 09:00:15,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199670408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:15,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35163183] [2021-11-09 09:00:15,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:00:15,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:15,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:00:15,339 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:00:15,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 09:00:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:00:16,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 09:00:16,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:00:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2052 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2021-11-09 09:00:18,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35163183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:18,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:00:18,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2021-11-09 09:00:18,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398109961] [2021-11-09 09:00:18,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-09 09:00:18,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:00:18,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-09 09:00:18,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 09:00:18,543 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand has 78 states, 78 states have (on average 2.128205128205128) internal successors, (166), 78 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:18,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:00:18,700 INFO L93 Difference]: Finished difference Result 276 states and 280 transitions. [2021-11-09 09:00:18,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 09:00:18,701 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.128205128205128) internal successors, (166), 78 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-09 09:00:18,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:00:18,702 INFO L225 Difference]: With dead ends: 276 [2021-11-09 09:00:18,702 INFO L226 Difference]: Without dead ends: 178 [2021-11-09 09:00:18,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 09:00:18,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-09 09:00:18,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-11-09 09:00:18,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0170454545454546) internal successors, (179), 176 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:18,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2021-11-09 09:00:18,712 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 174 [2021-11-09 09:00:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:00:18,712 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2021-11-09 09:00:18,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.128205128205128) internal successors, (166), 78 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:18,713 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2021-11-09 09:00:18,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-09 09:00:18,714 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:00:18,714 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 20, 20, 20, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:00:18,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-09 09:00:18,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:18,931 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:00:18,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:00:18,931 INFO L85 PathProgramCache]: Analyzing trace with hash 698926025, now seen corresponding path program 32 times [2021-11-09 09:00:18,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:00:18,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531473747] [2021-11-09 09:00:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:00:18,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:00:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:00:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2021-11-09 09:00:19,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:00:19,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531473747] [2021-11-09 09:00:19,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531473747] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:19,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80481657] [2021-11-09 09:00:19,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:00:19,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:19,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:00:19,918 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:00:19,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 09:00:21,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:00:21,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:00:21,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-09 09:00:21,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:00:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2021-11-09 09:00:23,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80481657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:23,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:00:23,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2021-11-09 09:00:23,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245019541] [2021-11-09 09:00:23,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-09 09:00:23,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:00:23,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-09 09:00:23,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 09:00:23,327 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand has 80 states, 80 states have (on average 2.125) internal successors, (170), 80 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:23,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:00:23,452 INFO L93 Difference]: Finished difference Result 278 states and 282 transitions. [2021-11-09 09:00:23,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 09:00:23,453 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.125) internal successors, (170), 80 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2021-11-09 09:00:23,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:00:23,455 INFO L225 Difference]: With dead ends: 278 [2021-11-09 09:00:23,456 INFO L226 Difference]: Without dead ends: 180 [2021-11-09 09:00:23,458 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 09:00:23,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-09 09:00:23,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2021-11-09 09:00:23,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0168539325842696) internal successors, (181), 178 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:23,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2021-11-09 09:00:23,470 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 176 [2021-11-09 09:00:23,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:00:23,470 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2021-11-09 09:00:23,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.125) internal successors, (170), 80 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:23,471 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2021-11-09 09:00:23,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-09 09:00:23,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:00:23,472 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 20, 20, 20, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:00:23,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 09:00:23,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-09 09:00:23,672 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:00:23,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:00:23,673 INFO L85 PathProgramCache]: Analyzing trace with hash -77910837, now seen corresponding path program 33 times [2021-11-09 09:00:23,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:00:23,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051239193] [2021-11-09 09:00:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:00:23,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:00:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:00:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2204 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2021-11-09 09:00:24,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:00:24,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051239193] [2021-11-09 09:00:24,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051239193] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:24,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912277620] [2021-11-09 09:00:24,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:00:24,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:24,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:00:24,705 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:00:24,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 09:00:26,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-11-09 09:00:26,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:00:26,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 09:00:26,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:00:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2204 backedges. 77 proven. 590 refuted. 0 times theorem prover too weak. 1537 trivial. 0 not checked. [2021-11-09 09:00:27,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912277620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:27,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:00:27,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 26] total 66 [2021-11-09 09:00:27,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824662476] [2021-11-09 09:00:27,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-09 09:00:27,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:00:27,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-09 09:00:27,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=3048, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 09:00:27,610 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand has 66 states, 66 states have (on average 2.4545454545454546) internal successors, (162), 66 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:28,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:00:28,656 INFO L93 Difference]: Finished difference Result 393 states and 399 transitions. [2021-11-09 09:00:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-09 09:00:28,659 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.4545454545454546) internal successors, (162), 66 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-09 09:00:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:00:28,661 INFO L225 Difference]: With dead ends: 393 [2021-11-09 09:00:28,662 INFO L226 Difference]: Without dead ends: 295 [2021-11-09 09:00:28,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1767, Invalid=5715, Unknown=0, NotChecked=0, Total=7482 [2021-11-09 09:00:28,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-09 09:00:28,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 186. [2021-11-09 09:00:28,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.0162162162162163) internal successors, (188), 185 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2021-11-09 09:00:28,682 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 178 [2021-11-09 09:00:28,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:00:28,682 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2021-11-09 09:00:28,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.4545454545454546) internal successors, (162), 66 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2021-11-09 09:00:28,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-09 09:00:28,684 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:00:28,685 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 21, 21, 21, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:00:28,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 09:00:28,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:28,907 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:00:28,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:00:28,907 INFO L85 PathProgramCache]: Analyzing trace with hash 262194479, now seen corresponding path program 34 times [2021-11-09 09:00:28,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:00:28,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804237777] [2021-11-09 09:00:28,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:00:28,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:00:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:00:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2021-11-09 09:00:30,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:00:30,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804237777] [2021-11-09 09:00:30,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804237777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:30,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707926289] [2021-11-09 09:00:30,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:00:30,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:30,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:00:30,059 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:00:30,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 09:00:31,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:00:31,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:00:31,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 09:00:31,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:00:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 1774 trivial. 0 not checked. [2021-11-09 09:00:32,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707926289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:32,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:00:32,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 24] total 66 [2021-11-09 09:00:32,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200209262] [2021-11-09 09:00:32,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-09 09:00:32,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:00:32,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-09 09:00:32,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1221, Invalid=3069, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 09:00:32,520 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand has 66 states, 66 states have (on average 2.5303030303030303) internal successors, (167), 66 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:32,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:00:32,873 INFO L93 Difference]: Finished difference Result 409 states and 414 transitions. [2021-11-09 09:00:32,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-09 09:00:32,873 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.5303030303030303) internal successors, (167), 66 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-11-09 09:00:32,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:00:32,876 INFO L225 Difference]: With dead ends: 409 [2021-11-09 09:00:32,876 INFO L226 Difference]: Without dead ends: 308 [2021-11-09 09:00:32,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1221, Invalid=3069, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 09:00:32,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-09 09:00:32,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 191. [2021-11-09 09:00:32,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0157894736842106) internal successors, (193), 190 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:32,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2021-11-09 09:00:32,892 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 185 [2021-11-09 09:00:32,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:00:32,892 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2021-11-09 09:00:32,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.5303030303030303) internal successors, (167), 66 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:00:32,893 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2021-11-09 09:00:32,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-09 09:00:32,894 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:00:32,894 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 22, 22, 22, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:00:32,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-09 09:00:33,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:33,115 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:00:33,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:00:33,115 INFO L85 PathProgramCache]: Analyzing trace with hash -2065965231, now seen corresponding path program 35 times [2021-11-09 09:00:33,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:00:33,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41173372] [2021-11-09 09:00:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:00:33,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:00:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:00:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2572 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 808 trivial. 0 not checked. [2021-11-09 09:00:34,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:00:34,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41173372] [2021-11-09 09:00:34,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41173372] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:00:34,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537663661] [2021-11-09 09:00:34,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:00:34,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:00:34,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:00:34,247 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:00:34,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 09:01:33,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-11-09 09:01:33,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:01:33,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:01:33,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:01:34,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2572 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1857 trivial. 0 not checked. [2021-11-09 09:01:34,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537663661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:01:34,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:01:34,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 25] total 68 [2021-11-09 09:01:34,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254954560] [2021-11-09 09:01:34,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-09 09:01:34,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:01:34,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-09 09:01:34,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1289, Invalid=3267, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 09:01:34,700 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand has 68 states, 68 states have (on average 2.5294117647058822) internal successors, (172), 68 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:01:35,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:01:35,136 INFO L93 Difference]: Finished difference Result 424 states and 429 transitions. [2021-11-09 09:01:35,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-09 09:01:35,137 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.5294117647058822) internal successors, (172), 68 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-11-09 09:01:35,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:01:35,139 INFO L225 Difference]: With dead ends: 424 [2021-11-09 09:01:35,139 INFO L226 Difference]: Without dead ends: 320 [2021-11-09 09:01:35,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1289, Invalid=3267, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 09:01:35,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-09 09:01:35,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 196. [2021-11-09 09:01:35,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0153846153846153) internal successors, (198), 195 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:01:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2021-11-09 09:01:35,157 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 190 [2021-11-09 09:01:35,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:01:35,157 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2021-11-09 09:01:35,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.5294117647058822) internal successors, (172), 68 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:01:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2021-11-09 09:01:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-09 09:01:35,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:01:35,160 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 23, 23, 23, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:01:35,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-09 09:01:35,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-09 09:01:35,375 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:01:35,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:01:35,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1135574827, now seen corresponding path program 36 times [2021-11-09 09:01:35,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:01:35,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449072166] [2021-11-09 09:01:35,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:01:35,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:01:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:01:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2724 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 875 trivial. 0 not checked. [2021-11-09 09:01:36,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:01:36,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449072166] [2021-11-09 09:01:36,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449072166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:01:36,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543291641] [2021-11-09 09:01:36,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:01:36,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:01:36,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:01:36,819 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:01:36,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 09:02:06,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2021-11-09 09:02:06,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:02:06,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 09:02:06,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:02:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2724 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 2241 trivial. 0 not checked. [2021-11-09 09:02:07,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543291641] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:02:07,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:02:07,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 19] total 63 [2021-11-09 09:02:07,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918098346] [2021-11-09 09:02:07,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-09 09:02:07,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:02:07,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-09 09:02:07,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=2823, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 09:02:07,632 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 63 states, 63 states have (on average 2.619047619047619) internal successors, (165), 63 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:08,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:02:08,277 INFO L93 Difference]: Finished difference Result 315 states and 320 transitions. [2021-11-09 09:02:08,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-09 09:02:08,277 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.619047619047619) internal successors, (165), 63 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-09 09:02:08,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:02:08,278 INFO L225 Difference]: With dead ends: 315 [2021-11-09 09:02:08,279 INFO L226 Difference]: Without dead ends: 208 [2021-11-09 09:02:08,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1098, Invalid=3192, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 09:02:08,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-09 09:02:08,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 203. [2021-11-09 09:02:08,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.0148514851485149) internal successors, (205), 202 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:08,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2021-11-09 09:02:08,295 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 195 [2021-11-09 09:02:08,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:02:08,296 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2021-11-09 09:02:08,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.619047619047619) internal successors, (165), 63 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:08,296 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2021-11-09 09:02:08,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-09 09:02:08,298 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:02:08,298 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 23, 23, 23, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:02:08,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-09 09:02:08,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-09 09:02:08,511 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:02:08,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:02:08,511 INFO L85 PathProgramCache]: Analyzing trace with hash -90608872, now seen corresponding path program 37 times [2021-11-09 09:02:08,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:02:08,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541180866] [2021-11-09 09:02:08,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:02:08,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:02:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:02:09,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2844 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-11-09 09:02:09,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:02:09,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541180866] [2021-11-09 09:02:09,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541180866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:02:09,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867622544] [2021-11-09 09:02:09,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:02:09,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:02:09,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:02:09,858 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:02:09,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 09:02:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:02:11,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-09 09:02:11,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:02:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2844 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-11-09 09:02:14,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867622544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:02:14,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:02:14,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 92 [2021-11-09 09:02:14,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229563358] [2021-11-09 09:02:14,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-09 09:02:14,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:02:14,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-09 09:02:14,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2021-11-09 09:02:14,376 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand has 92 states, 92 states have (on average 2.108695652173913) internal successors, (194), 92 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:14,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:02:14,532 INFO L93 Difference]: Finished difference Result 318 states and 322 transitions. [2021-11-09 09:02:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 09:02:14,532 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.108695652173913) internal successors, (194), 92 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-11-09 09:02:14,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:02:14,534 INFO L225 Difference]: With dead ends: 318 [2021-11-09 09:02:14,534 INFO L226 Difference]: Without dead ends: 206 [2021-11-09 09:02:14,535 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2021-11-09 09:02:14,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-09 09:02:14,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2021-11-09 09:02:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0147058823529411) internal successors, (207), 204 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:14,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2021-11-09 09:02:14,552 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 202 [2021-11-09 09:02:14,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:02:14,553 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2021-11-09 09:02:14,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.108695652173913) internal successors, (194), 92 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:14,554 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2021-11-09 09:02:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-09 09:02:14,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:02:14,555 INFO L513 BasicCegarLoop]: trace histogram [45, 45, 23, 23, 23, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:02:14,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-09 09:02:14,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:02:14,763 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:02:14,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:02:14,763 INFO L85 PathProgramCache]: Analyzing trace with hash -464734822, now seen corresponding path program 38 times [2021-11-09 09:02:14,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:02:14,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225421983] [2021-11-09 09:02:14,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:02:14,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:02:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:02:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2933 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-11-09 09:02:16,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:02:16,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225421983] [2021-11-09 09:02:16,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225421983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:02:16,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840829831] [2021-11-09 09:02:16,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:02:16,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:02:16,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:02:16,154 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:02:16,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 09:02:17,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:02:17,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:02:17,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 09:02:17,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:02:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2933 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-11-09 09:02:21,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840829831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:02:21,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:02:21,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 94 [2021-11-09 09:02:21,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039759170] [2021-11-09 09:02:21,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-09 09:02:21,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:02:21,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-09 09:02:21,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2021-11-09 09:02:21,159 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand has 94 states, 94 states have (on average 2.106382978723404) internal successors, (198), 94 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:21,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:02:21,347 INFO L93 Difference]: Finished difference Result 320 states and 324 transitions. [2021-11-09 09:02:21,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-09 09:02:21,348 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.106382978723404) internal successors, (198), 94 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-11-09 09:02:21,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:02:21,349 INFO L225 Difference]: With dead ends: 320 [2021-11-09 09:02:21,349 INFO L226 Difference]: Without dead ends: 208 [2021-11-09 09:02:21,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2021-11-09 09:02:21,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-09 09:02:21,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-11-09 09:02:21,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0145631067961165) internal successors, (209), 206 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:21,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2021-11-09 09:02:21,367 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 204 [2021-11-09 09:02:21,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:02:21,367 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2021-11-09 09:02:21,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.106382978723404) internal successors, (198), 94 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:21,368 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2021-11-09 09:02:21,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-09 09:02:21,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:02:21,370 INFO L513 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 23, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:02:21,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-09 09:02:21,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:02:21,599 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:02:21,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:02:21,599 INFO L85 PathProgramCache]: Analyzing trace with hash 777480092, now seen corresponding path program 39 times [2021-11-09 09:02:21,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:02:21,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502075213] [2021-11-09 09:02:21,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:02:21,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:02:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:02:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3024 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-11-09 09:02:23,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:02:23,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502075213] [2021-11-09 09:02:23,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502075213] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:02:23,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295494708] [2021-11-09 09:02:23,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:02:23,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:02:23,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:02:23,107 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:02:23,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 09:02:26,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-09 09:02:26,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:02:26,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 09:02:26,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:02:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3024 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 2242 trivial. 0 not checked. [2021-11-09 09:02:27,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295494708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:02:27,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:02:27,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 26] total 73 [2021-11-09 09:02:27,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102255477] [2021-11-09 09:02:27,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-09 09:02:27,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:02:27,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-09 09:02:27,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1500, Invalid=3756, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 09:02:27,979 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand has 73 states, 73 states have (on average 2.506849315068493) internal successors, (183), 73 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:28,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:02:28,428 INFO L93 Difference]: Finished difference Result 448 states and 453 transitions. [2021-11-09 09:02:28,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-09 09:02:28,429 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.506849315068493) internal successors, (183), 73 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-11-09 09:02:28,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:02:28,431 INFO L225 Difference]: With dead ends: 448 [2021-11-09 09:02:28,431 INFO L226 Difference]: Without dead ends: 336 [2021-11-09 09:02:28,432 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1500, Invalid=3756, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 09:02:28,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-09 09:02:28,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 212. [2021-11-09 09:02:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.014218009478673) internal successors, (214), 211 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2021-11-09 09:02:28,454 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 206 [2021-11-09 09:02:28,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:02:28,455 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2021-11-09 09:02:28,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.506849315068493) internal successors, (183), 73 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:28,455 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2021-11-09 09:02:28,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-09 09:02:28,457 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:02:28,458 INFO L513 BasicCegarLoop]: trace histogram [47, 47, 24, 24, 24, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:02:28,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-09 09:02:28,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:02:28,671 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:02:28,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:02:28,671 INFO L85 PathProgramCache]: Analyzing trace with hash -26444698, now seen corresponding path program 40 times [2021-11-09 09:02:28,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:02:28,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504833308] [2021-11-09 09:02:28,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:02:28,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:02:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:02:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 978 trivial. 0 not checked. [2021-11-09 09:02:30,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:02:30,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504833308] [2021-11-09 09:02:30,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504833308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:02:30,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856740095] [2021-11-09 09:02:30,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:02:30,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:02:30,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:02:30,242 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:02:30,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-09 09:02:32,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:02:32,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:02:32,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 09:02:32,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:02:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 2335 trivial. 0 not checked. [2021-11-09 09:02:33,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856740095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:02:33,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:02:33,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 27] total 75 [2021-11-09 09:02:33,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660328069] [2021-11-09 09:02:33,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-09 09:02:33,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:02:33,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-09 09:02:33,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1575, Invalid=3975, Unknown=0, NotChecked=0, Total=5550 [2021-11-09 09:02:33,657 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand has 75 states, 75 states have (on average 2.506666666666667) internal successors, (188), 75 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:34,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:02:34,149 INFO L93 Difference]: Finished difference Result 463 states and 468 transitions. [2021-11-09 09:02:34,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-09 09:02:34,150 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.506666666666667) internal successors, (188), 75 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2021-11-09 09:02:34,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:02:34,152 INFO L225 Difference]: With dead ends: 463 [2021-11-09 09:02:34,152 INFO L226 Difference]: Without dead ends: 348 [2021-11-09 09:02:34,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1575, Invalid=3975, Unknown=0, NotChecked=0, Total=5550 [2021-11-09 09:02:34,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-09 09:02:34,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 217. [2021-11-09 09:02:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.0138888888888888) internal successors, (219), 216 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2021-11-09 09:02:34,173 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 211 [2021-11-09 09:02:34,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:02:34,174 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2021-11-09 09:02:34,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.506666666666667) internal successors, (188), 75 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:34,174 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2021-11-09 09:02:34,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-09 09:02:34,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:02:34,176 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 25, 25, 25, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:02:34,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-09 09:02:34,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-09 09:02:34,403 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:02:34,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:02:34,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1995828320, now seen corresponding path program 41 times [2021-11-09 09:02:34,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:02:34,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062551279] [2021-11-09 09:02:34,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:02:34,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:02:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:02:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3355 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 1051 trivial. 0 not checked. [2021-11-09 09:02:35,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:02:35,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062551279] [2021-11-09 09:02:35,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062551279] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:02:35,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440337977] [2021-11-09 09:02:35,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:02:35,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:02:35,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:02:35,918 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:02:35,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-09 09:03:08,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-11-09 09:03:08,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:03:08,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 09:03:08,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:03:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3355 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 2430 trivial. 0 not checked. [2021-11-09 09:03:09,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440337977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:03:09,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:03:09,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 28] total 77 [2021-11-09 09:03:09,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366151125] [2021-11-09 09:03:09,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-09 09:03:09,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:03:09,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-09 09:03:09,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1652, Invalid=4200, Unknown=0, NotChecked=0, Total=5852 [2021-11-09 09:03:09,756 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand has 77 states, 77 states have (on average 2.5064935064935066) internal successors, (193), 77 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:10,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:03:10,240 INFO L93 Difference]: Finished difference Result 478 states and 483 transitions. [2021-11-09 09:03:10,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-09 09:03:10,241 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.5064935064935066) internal successors, (193), 77 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2021-11-09 09:03:10,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:03:10,243 INFO L225 Difference]: With dead ends: 478 [2021-11-09 09:03:10,243 INFO L226 Difference]: Without dead ends: 360 [2021-11-09 09:03:10,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1652, Invalid=4200, Unknown=0, NotChecked=0, Total=5852 [2021-11-09 09:03:10,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-09 09:03:10,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 222. [2021-11-09 09:03:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.0135746606334841) internal successors, (224), 221 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:10,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 224 transitions. [2021-11-09 09:03:10,260 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 224 transitions. Word has length 216 [2021-11-09 09:03:10,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:03:10,260 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 224 transitions. [2021-11-09 09:03:10,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.5064935064935066) internal successors, (193), 77 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:10,261 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 224 transitions. [2021-11-09 09:03:10,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-09 09:03:10,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:03:10,262 INFO L513 BasicCegarLoop]: trace histogram [49, 49, 26, 26, 26, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:03:10,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-09 09:03:10,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:03:10,475 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:03:10,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:03:10,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1098077086, now seen corresponding path program 42 times [2021-11-09 09:03:10,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:03:10,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441980648] [2021-11-09 09:03:10,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:03:10,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:03:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:03:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 1127 trivial. 0 not checked. [2021-11-09 09:03:11,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:03:11,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441980648] [2021-11-09 09:03:11,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441980648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:03:11,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141686607] [2021-11-09 09:03:11,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:03:11,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:03:11,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:03:11,775 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:03:11,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-09 09:03:51,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2021-11-09 09:03:51,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:03:51,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 09:03:51,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:03:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 2896 trivial. 0 not checked. [2021-11-09 09:03:52,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141686607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:03:52,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:03:52,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 21] total 71 [2021-11-09 09:03:52,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840550917] [2021-11-09 09:03:52,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-09 09:03:52,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:03:52,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-09 09:03:52,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=3590, Unknown=0, NotChecked=0, Total=4970 [2021-11-09 09:03:52,981 INFO L87 Difference]: Start difference. First operand 222 states and 224 transitions. Second operand has 71 states, 71 states have (on average 2.6056338028169015) internal successors, (185), 71 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:53,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:03:53,576 INFO L93 Difference]: Finished difference Result 355 states and 360 transitions. [2021-11-09 09:03:53,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-09 09:03:53,577 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.6056338028169015) internal successors, (185), 71 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2021-11-09 09:03:53,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:03:53,578 INFO L225 Difference]: With dead ends: 355 [2021-11-09 09:03:53,578 INFO L226 Difference]: Without dead ends: 234 [2021-11-09 09:03:53,579 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1395, Invalid=4007, Unknown=0, NotChecked=0, Total=5402 [2021-11-09 09:03:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-09 09:03:53,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 229. [2021-11-09 09:03:53,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.013157894736842) internal successors, (231), 228 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:53,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2021-11-09 09:03:53,590 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 221 [2021-11-09 09:03:53,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:03:53,590 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2021-11-09 09:03:53,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.6056338028169015) internal successors, (185), 71 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:03:53,591 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2021-11-09 09:03:53,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-09 09:03:53,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:03:53,592 INFO L513 BasicCegarLoop]: trace histogram [50, 50, 26, 26, 26, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:03:53,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-09 09:03:53,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:03:53,793 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:03:53,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:03:53,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1918940735, now seen corresponding path program 43 times [2021-11-09 09:03:53,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:03:53,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460766913] [2021-11-09 09:03:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:03:53,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:03:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:03:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3665 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2021-11-09 09:03:55,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:03:55,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460766913] [2021-11-09 09:03:55,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460766913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:03:55,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39516167] [2021-11-09 09:03:55,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:03:55,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:03:55,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:03:55,411 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:03:55,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-09 09:03:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:03:57,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-09 09:03:57,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:04:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3665 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2021-11-09 09:04:01,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39516167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:04:01,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:04:01,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 104 [2021-11-09 09:04:01,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305461077] [2021-11-09 09:04:01,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-09 09:04:01,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:04:01,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-09 09:04:01,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2021-11-09 09:04:01,261 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand has 104 states, 104 states have (on average 2.0961538461538463) internal successors, (218), 104 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:01,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:04:01,447 INFO L93 Difference]: Finished difference Result 358 states and 362 transitions. [2021-11-09 09:04:01,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-09 09:04:01,447 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0961538461538463) internal successors, (218), 104 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2021-11-09 09:04:01,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:04:01,449 INFO L225 Difference]: With dead ends: 358 [2021-11-09 09:04:01,449 INFO L226 Difference]: Without dead ends: 232 [2021-11-09 09:04:01,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2021-11-09 09:04:01,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-09 09:04:01,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2021-11-09 09:04:01,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.0130434782608695) internal successors, (233), 230 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:01,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2021-11-09 09:04:01,461 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 228 [2021-11-09 09:04:01,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:04:01,461 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2021-11-09 09:04:01,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0961538461538463) internal successors, (218), 104 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:01,462 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2021-11-09 09:04:01,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-09 09:04:01,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:04:01,464 INFO L513 BasicCegarLoop]: trace histogram [51, 51, 26, 26, 26, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:04:01,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-09 09:04:01,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:04:01,677 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:04:01,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:04:01,678 INFO L85 PathProgramCache]: Analyzing trace with hash 2006226371, now seen corresponding path program 44 times [2021-11-09 09:04:01,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:04:01,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576873239] [2021-11-09 09:04:01,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:04:01,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:04:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:04:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3766 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2021-11-09 09:04:03,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:04:03,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576873239] [2021-11-09 09:04:03,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576873239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:04:03,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805625583] [2021-11-09 09:04:03,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:04:03,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:04:03,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:04:03,294 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:04:03,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-09 09:04:05,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:04:05,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:04:05,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 09:04:05,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:04:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3766 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2021-11-09 09:04:08,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805625583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:04:08,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:04:08,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 106 [2021-11-09 09:04:08,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887428525] [2021-11-09 09:04:08,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-09 09:04:08,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:04:08,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-09 09:04:08,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2021-11-09 09:04:08,854 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand has 106 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 106 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:09,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:04:09,032 INFO L93 Difference]: Finished difference Result 360 states and 364 transitions. [2021-11-09 09:04:09,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-09 09:04:09,032 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 106 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2021-11-09 09:04:09,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:04:09,034 INFO L225 Difference]: With dead ends: 360 [2021-11-09 09:04:09,034 INFO L226 Difference]: Without dead ends: 234 [2021-11-09 09:04:09,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2021-11-09 09:04:09,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-09 09:04:09,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2021-11-09 09:04:09,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.0129310344827587) internal successors, (235), 232 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:09,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2021-11-09 09:04:09,047 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 230 [2021-11-09 09:04:09,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:04:09,048 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2021-11-09 09:04:09,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 106 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:09,048 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2021-11-09 09:04:09,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-09 09:04:09,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:04:09,050 INFO L513 BasicCegarLoop]: trace histogram [52, 52, 26, 26, 26, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:04:09,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-11-09 09:04:09,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:04:09,263 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:04:09,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:04:09,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1184437947, now seen corresponding path program 45 times [2021-11-09 09:04:09,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:04:09,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414488070] [2021-11-09 09:04:09,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:04:09,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:04:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:04:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3869 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2021-11-09 09:04:10,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:04:10,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414488070] [2021-11-09 09:04:10,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414488070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:04:10,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888494057] [2021-11-09 09:04:10,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:04:10,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:04:10,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:04:10,824 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:04:10,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-09 09:04:14,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-11-09 09:04:14,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:04:14,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 09:04:14,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:04:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3869 backedges. 103 proven. 1001 refuted. 0 times theorem prover too weak. 2765 trivial. 0 not checked. [2021-11-09 09:04:15,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888494057] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:04:15,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:04:15,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 32] total 85 [2021-11-09 09:04:15,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635079534] [2021-11-09 09:04:15,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-09 09:04:15,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:04:15,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-09 09:04:15,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2058, Invalid=5082, Unknown=0, NotChecked=0, Total=7140 [2021-11-09 09:04:15,803 INFO L87 Difference]: Start difference. First operand 233 states and 235 transitions. Second operand has 85 states, 85 states have (on average 2.4235294117647057) internal successors, (206), 85 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:17,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:04:17,192 INFO L93 Difference]: Finished difference Result 503 states and 509 transitions. [2021-11-09 09:04:17,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-09 09:04:17,192 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.4235294117647057) internal successors, (206), 85 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2021-11-09 09:04:17,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:04:17,194 INFO L225 Difference]: With dead ends: 503 [2021-11-09 09:04:17,195 INFO L226 Difference]: Without dead ends: 377 [2021-11-09 09:04:17,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2895, Invalid=9537, Unknown=0, NotChecked=0, Total=12432 [2021-11-09 09:04:17,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-09 09:04:17,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 240. [2021-11-09 09:04:17,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:17,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2021-11-09 09:04:17,215 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 232 [2021-11-09 09:04:17,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:04:17,216 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2021-11-09 09:04:17,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.4235294117647057) internal successors, (206), 85 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:17,216 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2021-11-09 09:04:17,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-09 09:04:17,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:04:17,218 INFO L513 BasicCegarLoop]: trace histogram [54, 54, 27, 27, 27, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:04:17,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-09 09:04:17,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-09 09:04:17,434 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:04:17,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:04:17,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1143154379, now seen corresponding path program 46 times [2021-11-09 09:04:17,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:04:17,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491756415] [2021-11-09 09:04:17,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:04:17,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:04:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:04:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 1244 trivial. 0 not checked. [2021-11-09 09:04:19,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:04:19,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491756415] [2021-11-09 09:04:19,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491756415] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:04:19,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656305985] [2021-11-09 09:04:19,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:04:19,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:04:19,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:04:19,113 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:04:19,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-09 09:04:21,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:04:21,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:04:21,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 09:04:21,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:04:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2021-11-09 09:04:22,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656305985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:04:22,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:04:22,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 30] total 85 [2021-11-09 09:04:22,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91132865] [2021-11-09 09:04:22,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-09 09:04:22,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:04:22,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-09 09:04:22,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2030, Invalid=5110, Unknown=0, NotChecked=0, Total=7140 [2021-11-09 09:04:22,810 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand has 85 states, 85 states have (on average 2.4823529411764707) internal successors, (211), 85 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:04:23,233 INFO L93 Difference]: Finished difference Result 519 states and 524 transitions. [2021-11-09 09:04:23,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-09 09:04:23,233 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.4823529411764707) internal successors, (211), 85 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2021-11-09 09:04:23,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:04:23,235 INFO L225 Difference]: With dead ends: 519 [2021-11-09 09:04:23,236 INFO L226 Difference]: Without dead ends: 390 [2021-11-09 09:04:23,236 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2030, Invalid=5110, Unknown=0, NotChecked=0, Total=7140 [2021-11-09 09:04:23,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-09 09:04:23,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 245. [2021-11-09 09:04:23,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0122950819672132) internal successors, (247), 244 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2021-11-09 09:04:23,255 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 239 [2021-11-09 09:04:23,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:04:23,255 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2021-11-09 09:04:23,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.4823529411764707) internal successors, (211), 85 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:04:23,256 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2021-11-09 09:04:23,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-09 09:04:23,257 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:04:23,258 INFO L513 BasicCegarLoop]: trace histogram [55, 55, 28, 28, 28, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:04:23,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-09 09:04:23,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:04:23,478 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:04:23,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:04:23,479 INFO L85 PathProgramCache]: Analyzing trace with hash 92151755, now seen corresponding path program 47 times [2021-11-09 09:04:23,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:04:23,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120198549] [2021-11-09 09:04:23,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:04:23,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:04:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:04:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4351 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2021-11-09 09:04:25,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:04:25,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120198549] [2021-11-09 09:04:25,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120198549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:04:25,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735081910] [2021-11-09 09:04:25,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:04:25,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:04:25,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:04:25,164 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:04:25,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-09 09:09:17,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2021-11-09 09:09:17,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:09:17,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 09:09:17,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4351 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 3189 trivial. 0 not checked. [2021-11-09 09:09:19,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735081910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:19,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:19,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 31] total 87 [2021-11-09 09:09:19,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079018291] [2021-11-09 09:09:19,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-09 09:09:19,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:19,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-09 09:09:19,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=5365, Unknown=0, NotChecked=0, Total=7482 [2021-11-09 09:09:19,325 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand has 87 states, 87 states have (on average 2.4827586206896552) internal successors, (216), 87 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:19,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:09:19,842 INFO L93 Difference]: Finished difference Result 534 states and 539 transitions. [2021-11-09 09:09:19,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-09 09:09:19,843 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.4827586206896552) internal successors, (216), 87 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2021-11-09 09:09:19,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:09:19,845 INFO L225 Difference]: With dead ends: 534 [2021-11-09 09:09:19,845 INFO L226 Difference]: Without dead ends: 402 [2021-11-09 09:09:19,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2117, Invalid=5365, Unknown=0, NotChecked=0, Total=7482 [2021-11-09 09:09:19,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-09 09:09:19,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 250. [2021-11-09 09:09:19,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.0120481927710843) internal successors, (252), 249 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:19,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 252 transitions. [2021-11-09 09:09:19,866 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 252 transitions. Word has length 244 [2021-11-09 09:09:19,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:09:19,866 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 252 transitions. [2021-11-09 09:09:19,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.4827586206896552) internal successors, (216), 87 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:19,867 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 252 transitions. [2021-11-09 09:09:19,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-09 09:09:19,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:09:19,868 INFO L513 BasicCegarLoop]: trace histogram [56, 56, 29, 29, 29, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:19,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:20,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:20,069 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:09:20,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:20,070 INFO L85 PathProgramCache]: Analyzing trace with hash 917440945, now seen corresponding path program 48 times [2021-11-09 09:09:20,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:20,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738813114] [2021-11-09 09:09:20,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:20,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4547 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 1411 trivial. 0 not checked. [2021-11-09 09:09:21,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:21,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738813114] [2021-11-09 09:09:21,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738813114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:21,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012502224] [2021-11-09 09:09:21,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:09:21,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:21,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:21,628 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:21,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-09 09:10:37,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 53 check-sat command(s) [2021-11-09 09:10:37,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:10:37,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 09:10:37,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4547 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 3746 trivial. 0 not checked. [2021-11-09 09:10:38,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012502224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:38,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:38,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 23] total 80 [2021-11-09 09:10:38,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385235554] [2021-11-09 09:10:38,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-09 09:10:38,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:38,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-09 09:10:38,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1771, Invalid=4549, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 09:10:38,646 INFO L87 Difference]: Start difference. First operand 250 states and 252 transitions. Second operand has 80 states, 80 states have (on average 2.5875) internal successors, (207), 80 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:10:39,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:10:39,270 INFO L93 Difference]: Finished difference Result 397 states and 402 transitions. [2021-11-09 09:10:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-09 09:10:39,270 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.5875) internal successors, (207), 80 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2021-11-09 09:10:39,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:10:39,271 INFO L225 Difference]: With dead ends: 397 [2021-11-09 09:10:39,271 INFO L226 Difference]: Without dead ends: 262 [2021-11-09 09:10:39,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1786, Invalid=5020, Unknown=0, NotChecked=0, Total=6806 [2021-11-09 09:10:39,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-09 09:10:39,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 257. [2021-11-09 09:10:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.01171875) internal successors, (259), 256 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:10:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 259 transitions. [2021-11-09 09:10:39,285 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 259 transitions. Word has length 249 [2021-11-09 09:10:39,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:10:39,285 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 259 transitions. [2021-11-09 09:10:39,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.5875) internal successors, (207), 80 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:10:39,285 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 259 transitions. [2021-11-09 09:10:39,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-09 09:10:39,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:10:39,287 INFO L513 BasicCegarLoop]: trace histogram [57, 57, 29, 29, 29, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:39,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:39,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-09 09:10:39,495 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:10:39,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:39,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1913777874, now seen corresponding path program 49 times [2021-11-09 09:10:39,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:39,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532239480] [2021-11-09 09:10:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:39,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:39,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:41,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4703 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 1454 trivial. 0 not checked. [2021-11-09 09:10:41,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:41,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532239480] [2021-11-09 09:10:41,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532239480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:41,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623518492] [2021-11-09 09:10:41,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:10:41,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:41,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:41,121 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:41,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-09 09:10:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:43,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-09 09:10:43,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4703 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 1454 trivial. 0 not checked. [2021-11-09 09:10:47,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623518492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:47,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:47,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 118 [2021-11-09 09:10:47,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192198323] [2021-11-09 09:10:47,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2021-11-09 09:10:47,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:47,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-11-09 09:10:47,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2021-11-09 09:10:47,599 INFO L87 Difference]: Start difference. First operand 257 states and 259 transitions. Second operand has 118 states, 118 states have (on average 2.0847457627118646) internal successors, (246), 118 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:10:47,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:10:47,788 INFO L93 Difference]: Finished difference Result 400 states and 404 transitions. [2021-11-09 09:10:47,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-09 09:10:47,788 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0847457627118646) internal successors, (246), 118 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 256 [2021-11-09 09:10:47,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:10:47,789 INFO L225 Difference]: With dead ends: 400 [2021-11-09 09:10:47,789 INFO L226 Difference]: Without dead ends: 260 [2021-11-09 09:10:47,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2021-11-09 09:10:47,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-09 09:10:47,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2021-11-09 09:10:47,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.0116279069767442) internal successors, (261), 258 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:10:47,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 261 transitions. [2021-11-09 09:10:47,810 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 261 transitions. Word has length 256 [2021-11-09 09:10:47,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:10:47,810 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 261 transitions. [2021-11-09 09:10:47,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0847457627118646) internal successors, (246), 118 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:10:47,811 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 261 transitions. [2021-11-09 09:10:47,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-09 09:10:47,812 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:10:47,813 INFO L513 BasicCegarLoop]: trace histogram [58, 58, 29, 29, 29, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:47,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:48,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-09 09:10:48,027 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:10:48,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:48,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1795357740, now seen corresponding path program 50 times [2021-11-09 09:10:48,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:48,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095442968] [2021-11-09 09:10:48,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:48,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 1454 trivial. 0 not checked. [2021-11-09 09:10:49,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:49,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095442968] [2021-11-09 09:10:49,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095442968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:49,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959592780] [2021-11-09 09:10:49,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:10:49,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:49,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:49,706 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:49,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-09 09:10:52,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:10:52,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:10:52,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-09 09:10:52,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 1454 trivial. 0 not checked. [2021-11-09 09:10:56,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959592780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:56,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:56,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 120 [2021-11-09 09:10:56,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775370844] [2021-11-09 09:10:56,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2021-11-09 09:10:56,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:56,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-11-09 09:10:56,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2021-11-09 09:10:56,396 INFO L87 Difference]: Start difference. First operand 259 states and 261 transitions. Second operand has 120 states, 120 states have (on average 2.0833333333333335) internal successors, (250), 120 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:10:56,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:10:56,606 INFO L93 Difference]: Finished difference Result 402 states and 406 transitions. [2021-11-09 09:10:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-09 09:10:56,606 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.0833333333333335) internal successors, (250), 120 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2021-11-09 09:10:56,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:10:56,608 INFO L225 Difference]: With dead ends: 402 [2021-11-09 09:10:56,608 INFO L226 Difference]: Without dead ends: 262 [2021-11-09 09:10:56,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2021-11-09 09:10:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-09 09:10:56,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2021-11-09 09:10:56,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0115384615384615) internal successors, (263), 260 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:10:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 263 transitions. [2021-11-09 09:10:56,628 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 263 transitions. Word has length 258 [2021-11-09 09:10:56,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:10:56,629 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 263 transitions. [2021-11-09 09:10:56,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.0833333333333335) internal successors, (250), 120 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:10:56,629 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 263 transitions. [2021-11-09 09:10:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-09 09:10:56,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:10:56,631 INFO L513 BasicCegarLoop]: trace histogram [59, 59, 29, 29, 29, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:56,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:56,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-09 09:10:56,857 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:10:56,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:56,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1451827114, now seen corresponding path program 51 times [2021-11-09 09:10:56,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:56,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549691849] [2021-11-09 09:10:56,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:56,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4935 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 1454 trivial. 0 not checked. [2021-11-09 09:10:58,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:58,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549691849] [2021-11-09 09:10:58,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549691849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:58,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68674532] [2021-11-09 09:10:58,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:10:58,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:58,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:58,608 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:58,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-09 09:11:06,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-11-09 09:11:06,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:11:06,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 09:11:06,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:11:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4935 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 3688 trivial. 0 not checked. [2021-11-09 09:11:07,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68674532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:07,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:11:07,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 32] total 92 [2021-11-09 09:11:07,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45248253] [2021-11-09 09:11:07,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-09 09:11:07,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:11:07,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-09 09:11:07,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2386, Invalid=5986, Unknown=0, NotChecked=0, Total=8372 [2021-11-09 09:11:07,563 INFO L87 Difference]: Start difference. First operand 261 states and 263 transitions. Second operand has 92 states, 92 states have (on average 2.467391304347826) internal successors, (227), 92 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:11:08,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:11:08,011 INFO L93 Difference]: Finished difference Result 558 states and 563 transitions. [2021-11-09 09:11:08,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-09 09:11:08,011 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.467391304347826) internal successors, (227), 92 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2021-11-09 09:11:08,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:11:08,013 INFO L225 Difference]: With dead ends: 558 [2021-11-09 09:11:08,013 INFO L226 Difference]: Without dead ends: 418 [2021-11-09 09:11:08,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2386, Invalid=5986, Unknown=0, NotChecked=0, Total=8372 [2021-11-09 09:11:08,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-09 09:11:08,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 266. [2021-11-09 09:11:08,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.0113207547169811) internal successors, (268), 265 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:11:08,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 268 transitions. [2021-11-09 09:11:08,028 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 268 transitions. Word has length 260 [2021-11-09 09:11:08,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:11:08,028 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 268 transitions. [2021-11-09 09:11:08,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.467391304347826) internal successors, (227), 92 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:11:08,028 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 268 transitions. [2021-11-09 09:11:08,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-09 09:11:08,030 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:11:08,030 INFO L513 BasicCegarLoop]: trace histogram [60, 60, 30, 30, 30, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:11:08,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-11-09 09:11:08,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-11-09 09:11:08,239 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:11:08,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:11:08,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1606803244, now seen corresponding path program 52 times [2021-11-09 09:11:08,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:11:08,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486077153] [2021-11-09 09:11:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:11:08,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:11:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:11:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5142 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 1542 trivial. 0 not checked. [2021-11-09 09:11:10,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:11:10,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486077153] [2021-11-09 09:11:10,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486077153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:10,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518568701] [2021-11-09 09:11:10,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:11:10,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:10,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:11:10,002 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:11:10,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-09 09:11:12,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:11:12,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:11:12,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 09:11:12,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:11:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5142 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 3807 trivial. 0 not checked. [2021-11-09 09:11:14,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518568701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:14,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:11:14,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 33] total 94 [2021-11-09 09:11:14,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556940102] [2021-11-09 09:11:14,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-09 09:11:14,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:11:14,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-09 09:11:14,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2480, Invalid=6262, Unknown=0, NotChecked=0, Total=8742 [2021-11-09 09:11:14,252 INFO L87 Difference]: Start difference. First operand 266 states and 268 transitions. Second operand has 94 states, 94 states have (on average 2.4680851063829787) internal successors, (232), 94 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:11:14,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:11:14,663 INFO L93 Difference]: Finished difference Result 573 states and 578 transitions. [2021-11-09 09:11:14,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-09 09:11:14,663 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.4680851063829787) internal successors, (232), 94 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2021-11-09 09:11:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:11:14,665 INFO L225 Difference]: With dead ends: 573 [2021-11-09 09:11:14,666 INFO L226 Difference]: Without dead ends: 430 [2021-11-09 09:11:14,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2480, Invalid=6262, Unknown=0, NotChecked=0, Total=8742 [2021-11-09 09:11:14,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-11-09 09:11:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 271. [2021-11-09 09:11:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.011111111111111) internal successors, (273), 270 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:11:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 273 transitions. [2021-11-09 09:11:14,680 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 273 transitions. Word has length 265 [2021-11-09 09:11:14,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:11:14,681 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 273 transitions. [2021-11-09 09:11:14,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.4680851063829787) internal successors, (232), 94 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:11:14,681 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 273 transitions. [2021-11-09 09:11:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-09 09:11:14,683 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:11:14,683 INFO L513 BasicCegarLoop]: trace histogram [61, 61, 31, 31, 31, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:11:14,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-11-09 09:11:14,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:14,890 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:11:14,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:11:14,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1919116762, now seen corresponding path program 53 times [2021-11-09 09:11:14,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:11:14,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606110650] [2021-11-09 09:11:14,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:11:14,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:11:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:11:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5354 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 1633 trivial. 0 not checked. [2021-11-09 09:11:16,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:11:16,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606110650] [2021-11-09 09:11:16,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606110650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:16,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706255002] [2021-11-09 09:11:16,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:11:16,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:16,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:11:16,776 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:11:16,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87468cd0-5487-4140-9018-47052d375482/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process