./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/EvenOdd01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/EvenOdd01-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:45:31,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:45:31,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:45:31,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:45:31,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:45:31,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:45:31,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:45:31,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:45:31,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:45:31,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:45:31,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:45:31,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:45:31,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:45:31,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:45:31,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:45:31,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:45:31,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:45:31,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:45:31,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:45:31,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:45:31,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:45:31,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:45:31,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:45:31,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:45:31,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:45:31,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:45:31,360 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:45:31,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:45:31,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:45:31,365 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:45:31,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:45:31,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:45:31,369 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:45:31,370 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:45:31,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:45:31,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:45:31,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:45:31,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:45:31,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:45:31,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:45:31,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:45:31,377 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-11-07 07:45:31,422 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:45:31,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:45:31,425 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:45:31,425 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:45:31,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:45:31,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:45:31,434 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:45:31,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:45:31,434 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:45:31,434 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 07:45:31,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:45:31,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:45:31,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:45:31,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:45:31,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:45:31,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:45:31,437 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-07 07:45:31,437 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:45:31,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:45:31,438 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:45:31,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:45:31,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:45:31,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:45:31,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:45:31,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:45:31,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:45:31,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:45:31,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:45:31,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:45:31,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:45:31,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:45:31,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:45:31,441 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_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc [2021-11-07 07:45:31,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:45:31,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:45:31,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:45:31,766 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:45:31,766 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:45:31,768 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/recursive/EvenOdd01-1.c [2021-11-07 07:45:31,849 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/data/35320c44e/553d7f09fa2c4111830dfae51a57572f/FLAG52a2ad837 [2021-11-07 07:45:32,360 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:45:32,361 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/sv-benchmarks/c/recursive/EvenOdd01-1.c [2021-11-07 07:45:32,372 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/data/35320c44e/553d7f09fa2c4111830dfae51a57572f/FLAG52a2ad837 [2021-11-07 07:45:32,724 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/data/35320c44e/553d7f09fa2c4111830dfae51a57572f [2021-11-07 07:45:32,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:45:32,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:45:32,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:45:32,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:45:32,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:45:32,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:45:32" (1/1) ... [2021-11-07 07:45:32,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52b1536a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:32, skipping insertion in model container [2021-11-07 07:45:32,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:45:32" (1/1) ... [2021-11-07 07:45:32,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:45:32,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:45:32,903 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_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/sv-benchmarks/c/recursive/EvenOdd01-1.c[975,988] [2021-11-07 07:45:32,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:45:32,924 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:45:32,946 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_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/sv-benchmarks/c/recursive/EvenOdd01-1.c[975,988] [2021-11-07 07:45:32,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:45:32,962 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:45:32,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:32 WrapperNode [2021-11-07 07:45:32,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:45:32,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:45:32,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:45:32,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:45:32,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:32" (1/1) ... [2021-11-07 07:45:32,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:32" (1/1) ... [2021-11-07 07:45:32,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:45:32,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:45:32,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:45:32,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:45:33,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:32" (1/1) ... [2021-11-07 07:45:33,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:32" (1/1) ... [2021-11-07 07:45:33,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:32" (1/1) ... [2021-11-07 07:45:33,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:32" (1/1) ... [2021-11-07 07:45:33,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:32" (1/1) ... [2021-11-07 07:45:33,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:32" (1/1) ... [2021-11-07 07:45:33,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:32" (1/1) ... [2021-11-07 07:45:33,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:45:33,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:45:33,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:45:33,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:45:33,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:32" (1/1) ... [2021-11-07 07:45:33,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:45:33,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:33,060 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:45:33,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:45:33,119 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2021-11-07 07:45:33,120 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2021-11-07 07:45:33,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:45:33,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:45:33,120 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2021-11-07 07:45:33,120 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2021-11-07 07:45:33,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:45:33,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:45:33,387 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:45:33,387 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 07:45:33,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:45:33 BoogieIcfgContainer [2021-11-07 07:45:33,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:45:33,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:45:33,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:45:33,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:45:33,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:45:32" (1/3) ... [2021-11-07 07:45:33,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af3e39e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:45:33, skipping insertion in model container [2021-11-07 07:45:33,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:32" (2/3) ... [2021-11-07 07:45:33,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af3e39e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:45:33, skipping insertion in model container [2021-11-07 07:45:33,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:45:33" (3/3) ... [2021-11-07 07:45:33,427 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2021-11-07 07:45:33,434 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:45:33,435 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-07 07:45:33,486 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:45:33,493 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=FINITE_AUTOMATA, 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 [2021-11-07 07:45:33,493 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-07 07:45:33,512 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:45:33,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 07:45:33,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:33,517 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:33,518 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:33,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:33,524 INFO L85 PathProgramCache]: Analyzing trace with hash -592993799, now seen corresponding path program 1 times [2021-11-07 07:45:33,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:33,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585820472] [2021-11-07 07:45:33,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:33,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:33,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:33,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585820472] [2021-11-07 07:45:33,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585820472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:45:33,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:45:33,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:45:33,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724844131] [2021-11-07 07:45:33,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:45:33,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:33,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:45:33,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:45:33,886 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:34,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:34,007 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-11-07 07:45:34,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:45:34,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 07:45:34,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:34,019 INFO L225 Difference]: With dead ends: 48 [2021-11-07 07:45:34,019 INFO L226 Difference]: Without dead ends: 27 [2021-11-07 07:45:34,024 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:45:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-07 07:45:34,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-11-07 07:45:34,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-11-07 07:45:34,068 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 8 [2021-11-07 07:45:34,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:34,070 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-11-07 07:45:34,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:34,070 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-11-07 07:45:34,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 07:45:34,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:34,072 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:34,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:45:34,074 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:34,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:34,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1202938527, now seen corresponding path program 1 times [2021-11-07 07:45:34,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:34,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715168858] [2021-11-07 07:45:34,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:34,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:34,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:34,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715168858] [2021-11-07 07:45:34,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715168858] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:45:34,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:45:34,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:45:34,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019512607] [2021-11-07 07:45:34,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:45:34,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:34,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:45:34,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:45:34,195 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:34,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:34,239 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-11-07 07:45:34,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:45:34,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-07 07:45:34,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:34,241 INFO L225 Difference]: With dead ends: 27 [2021-11-07 07:45:34,262 INFO L226 Difference]: Without dead ends: 26 [2021-11-07 07:45:34,263 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:45:34,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-07 07:45:34,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-07 07:45:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:34,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-11-07 07:45:34,269 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 9 [2021-11-07 07:45:34,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:34,270 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-11-07 07:45:34,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:34,270 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-11-07 07:45:34,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 07:45:34,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:34,271 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:34,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:45:34,272 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:34,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:34,273 INFO L85 PathProgramCache]: Analyzing trace with hash 708932889, now seen corresponding path program 1 times [2021-11-07 07:45:34,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:34,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787020054] [2021-11-07 07:45:34,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:34,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:34,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:34,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787020054] [2021-11-07 07:45:34,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787020054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:45:34,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:45:34,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 07:45:34,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531037284] [2021-11-07 07:45:34,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:45:34,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:34,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:45:34,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:45:34,349 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:34,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:34,405 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-11-07 07:45:34,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:45:34,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 07:45:34,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:34,407 INFO L225 Difference]: With dead ends: 25 [2021-11-07 07:45:34,407 INFO L226 Difference]: Without dead ends: 23 [2021-11-07 07:45:34,408 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:45:34,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-07 07:45:34,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-07 07:45:34,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-11-07 07:45:34,413 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 14 [2021-11-07 07:45:34,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:34,413 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-11-07 07:45:34,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:34,414 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-11-07 07:45:34,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 07:45:34,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:34,415 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:34,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:45:34,416 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:34,417 INFO L85 PathProgramCache]: Analyzing trace with hash 502083121, now seen corresponding path program 1 times [2021-11-07 07:45:34,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:34,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652536975] [2021-11-07 07:45:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:34,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:34,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:34,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652536975] [2021-11-07 07:45:34,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652536975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:45:34,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:45:34,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 07:45:34,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111513801] [2021-11-07 07:45:34,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:45:34,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:34,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:45:34,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:45:34,517 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:34,621 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-11-07 07:45:34,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:45:34,622 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 07:45:34,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:34,623 INFO L225 Difference]: With dead ends: 31 [2021-11-07 07:45:34,625 INFO L226 Difference]: Without dead ends: 30 [2021-11-07 07:45:34,625 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:45:34,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-07 07:45:34,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-11-07 07:45:34,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:34,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-11-07 07:45:34,638 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 15 [2021-11-07 07:45:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:34,639 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-11-07 07:45:34,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:34,640 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-11-07 07:45:34,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 07:45:34,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:34,644 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:34,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:45:34,645 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:34,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:34,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1165045203, now seen corresponding path program 1 times [2021-11-07 07:45:34,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:34,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18500675] [2021-11-07 07:45:34,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:34,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:34,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:34,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18500675] [2021-11-07 07:45:34,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18500675] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:34,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343263475] [2021-11-07 07:45:34,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:34,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:34,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:34,789 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:34,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:45:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:34,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:45:34,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:34,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343263475] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:34,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:34,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-11-07 07:45:34,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48034749] [2021-11-07 07:45:34,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:45:34,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:34,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:45:34,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:45:34,967 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:35,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:35,044 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-11-07 07:45:35,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:45:35,045 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-07 07:45:35,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:35,046 INFO L225 Difference]: With dead ends: 37 [2021-11-07 07:45:35,046 INFO L226 Difference]: Without dead ends: 36 [2021-11-07 07:45:35,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:45:35,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-07 07:45:35,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-11-07 07:45:35,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:35,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-11-07 07:45:35,057 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 21 [2021-11-07 07:45:35,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:35,058 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-11-07 07:45:35,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:35,059 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-11-07 07:45:35,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 07:45:35,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:35,060 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:35,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:35,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:35,283 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:35,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1340875043, now seen corresponding path program 1 times [2021-11-07 07:45:35,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:35,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719768923] [2021-11-07 07:45:35,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:35,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:35,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:35,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719768923] [2021-11-07 07:45:35,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719768923] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:35,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206635171] [2021-11-07 07:45:35,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:35,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:35,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:35,410 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:35,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:45:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:35,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 07:45:35,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:35,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206635171] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:35,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:35,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-11-07 07:45:35,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623721715] [2021-11-07 07:45:35,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 07:45:35,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:35,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 07:45:35,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:45:35,580 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:35,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:35,699 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-11-07 07:45:35,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:45:35,700 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 07:45:35,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:35,701 INFO L225 Difference]: With dead ends: 43 [2021-11-07 07:45:35,701 INFO L226 Difference]: Without dead ends: 42 [2021-11-07 07:45:35,701 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:45:35,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-07 07:45:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-11-07 07:45:35,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:35,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-11-07 07:45:35,708 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 27 [2021-11-07 07:45:35,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:35,708 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-11-07 07:45:35,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:35,709 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-11-07 07:45:35,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 07:45:35,710 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:35,710 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-07 07:45:35,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:35,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:35,937 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:35,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:35,937 INFO L85 PathProgramCache]: Analyzing trace with hash 647406405, now seen corresponding path program 2 times [2021-11-07 07:45:35,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:35,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125209884] [2021-11-07 07:45:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:35,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:36,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:36,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125209884] [2021-11-07 07:45:36,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125209884] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:36,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664563093] [2021-11-07 07:45:36,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:45:36,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:36,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:36,166 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:36,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:45:36,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:45:36,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:36,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:45:36,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:36,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664563093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:36,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:36,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-11-07 07:45:36,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010963440] [2021-11-07 07:45:36,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:45:36,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:36,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:45:36,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:45:36,448 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:36,625 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-11-07 07:45:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:45:36,626 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-07 07:45:36,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:36,629 INFO L225 Difference]: With dead ends: 49 [2021-11-07 07:45:36,629 INFO L226 Difference]: Without dead ends: 48 [2021-11-07 07:45:36,629 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:45:36,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-07 07:45:36,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-11-07 07:45:36,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 7 states have call successors, (7), 7 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-11-07 07:45:36,638 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 33 [2021-11-07 07:45:36,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:36,639 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-11-07 07:45:36,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:36,639 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-11-07 07:45:36,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 07:45:36,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:36,641 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2021-11-07 07:45:36,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-07 07:45:36,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-07 07:45:36,862 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:36,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:36,863 INFO L85 PathProgramCache]: Analyzing trace with hash -924042987, now seen corresponding path program 2 times [2021-11-07 07:45:36,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:36,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003034609] [2021-11-07 07:45:36,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:36,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:37,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:37,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003034609] [2021-11-07 07:45:37,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003034609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:37,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992310731] [2021-11-07 07:45:37,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:45:37,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:37,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:37,074 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:37,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:45:37,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:45:37,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:37,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 07:45:37,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:37,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992310731] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:37,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:37,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-11-07 07:45:37,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170606566] [2021-11-07 07:45:37,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:45:37,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:37,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:45:37,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:45:37,327 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 15 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:37,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:37,482 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2021-11-07 07:45:37,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 07:45:37,483 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-07 07:45:37,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:37,485 INFO L225 Difference]: With dead ends: 55 [2021-11-07 07:45:37,485 INFO L226 Difference]: Without dead ends: 54 [2021-11-07 07:45:37,485 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:45:37,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-07 07:45:37,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-11-07 07:45:37,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:37,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-11-07 07:45:37,493 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 39 [2021-11-07 07:45:37,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:37,493 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-11-07 07:45:37,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:37,494 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-11-07 07:45:37,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 07:45:37,495 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:37,496 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-07 07:45:37,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:37,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-07 07:45:37,710 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:37,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:37,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1869775433, now seen corresponding path program 3 times [2021-11-07 07:45:37,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:37,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255470131] [2021-11-07 07:45:37,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:37,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:37,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:37,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255470131] [2021-11-07 07:45:37,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255470131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:37,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622308900] [2021-11-07 07:45:37,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:45:37,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:37,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:37,919 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:37,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:45:38,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 07:45:38,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:38,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:45:38,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:38,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622308900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:38,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:38,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-11-07 07:45:38,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738404143] [2021-11-07 07:45:38,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:45:38,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:38,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:45:38,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:45:38,235 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 17 states, 15 states have (on average 2.533333333333333) internal successors, (38), 10 states have internal predecessors, (38), 7 states have call successors, (7), 7 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:38,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:38,430 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2021-11-07 07:45:38,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 07:45:38,431 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.533333333333333) internal successors, (38), 10 states have internal predecessors, (38), 7 states have call successors, (7), 7 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 07:45:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:38,435 INFO L225 Difference]: With dead ends: 61 [2021-11-07 07:45:38,435 INFO L226 Difference]: Without dead ends: 60 [2021-11-07 07:45:38,436 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:45:38,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-07 07:45:38,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-11-07 07:45:38,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 49 states have internal predecessors, (50), 9 states have call successors, (9), 9 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-11-07 07:45:38,450 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 45 [2021-11-07 07:45:38,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:38,452 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-11-07 07:45:38,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.533333333333333) internal successors, (38), 10 states have internal predecessors, (38), 7 states have call successors, (7), 7 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-11-07 07:45:38,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 07:45:38,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:38,462 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2021-11-07 07:45:38,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:38,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:38,690 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:38,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:38,690 INFO L85 PathProgramCache]: Analyzing trace with hash -10619385, now seen corresponding path program 3 times [2021-11-07 07:45:38,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:38,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958650905] [2021-11-07 07:45:38,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:38,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:38,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:38,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958650905] [2021-11-07 07:45:38,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958650905] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:38,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836360035] [2021-11-07 07:45:38,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:45:38,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:38,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:38,890 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:38,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:45:39,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 07:45:39,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:39,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 07:45:39,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:39,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836360035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:39,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:39,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-11-07 07:45:39,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279021356] [2021-11-07 07:45:39,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:45:39,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:39,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:45:39,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:45:39,184 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 19 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 11 states have internal predecessors, (43), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:39,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:39,397 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-11-07 07:45:39,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 07:45:39,398 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 11 states have internal predecessors, (43), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 07:45:39,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:39,399 INFO L225 Difference]: With dead ends: 67 [2021-11-07 07:45:39,399 INFO L226 Difference]: Without dead ends: 66 [2021-11-07 07:45:39,400 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-11-07 07:45:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-07 07:45:39,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-11-07 07:45:39,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:39,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-11-07 07:45:39,407 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 51 [2021-11-07 07:45:39,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:39,408 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-11-07 07:45:39,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 11 states have internal predecessors, (43), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:39,408 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-11-07 07:45:39,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 07:45:39,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:39,409 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-07 07:45:39,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-07 07:45:39,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 07:45:39,610 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:39,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:39,611 INFO L85 PathProgramCache]: Analyzing trace with hash -2090451671, now seen corresponding path program 4 times [2021-11-07 07:45:39,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:39,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685867531] [2021-11-07 07:45:39,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:39,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:39,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:39,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685867531] [2021-11-07 07:45:39,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685867531] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:39,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563570848] [2021-11-07 07:45:39,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:45:39,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:39,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:39,832 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:39,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:45:39,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:45:39,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:39,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:45:39,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:40,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563570848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:40,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:40,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-11-07 07:45:40,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815445270] [2021-11-07 07:45:40,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:45:40,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:40,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:45:40,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:45:40,153 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 12 states have internal predecessors, (48), 9 states have call successors, (9), 9 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:40,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:40,361 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2021-11-07 07:45:40,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 07:45:40,362 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 12 states have internal predecessors, (48), 9 states have call successors, (9), 9 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 07:45:40,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:40,363 INFO L225 Difference]: With dead ends: 73 [2021-11-07 07:45:40,363 INFO L226 Difference]: Without dead ends: 72 [2021-11-07 07:45:40,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:45:40,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-07 07:45:40,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-11-07 07:45:40,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 59 states have internal predecessors, (60), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-11-07 07:45:40,371 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 57 [2021-11-07 07:45:40,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:40,371 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-11-07 07:45:40,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 12 states have internal predecessors, (48), 9 states have call successors, (9), 9 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:40,372 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-11-07 07:45:40,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 07:45:40,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:40,373 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2021-11-07 07:45:40,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:40,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 07:45:40,598 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:40,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:40,598 INFO L85 PathProgramCache]: Analyzing trace with hash -990783495, now seen corresponding path program 4 times [2021-11-07 07:45:40,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:40,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958030081] [2021-11-07 07:45:40,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:40,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:40,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:40,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958030081] [2021-11-07 07:45:40,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958030081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:40,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719218034] [2021-11-07 07:45:40,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:45:40,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:40,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:40,834 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:40,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:45:41,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:45:41,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:41,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:45:41,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:41,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719218034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:41,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:41,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-11-07 07:45:41,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226208556] [2021-11-07 07:45:41,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:45:41,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:41,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:45:41,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:45:41,272 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 13 states have internal predecessors, (53), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:41,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:41,563 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2021-11-07 07:45:41,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 07:45:41,564 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 13 states have internal predecessors, (53), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 07:45:41,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:41,565 INFO L225 Difference]: With dead ends: 79 [2021-11-07 07:45:41,565 INFO L226 Difference]: Without dead ends: 78 [2021-11-07 07:45:41,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:45:41,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-07 07:45:41,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-11-07 07:45:41,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 64 states have internal predecessors, (65), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:41,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-11-07 07:45:41,576 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 63 [2021-11-07 07:45:41,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:41,576 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-11-07 07:45:41,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 13 states have internal predecessors, (53), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:41,577 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-11-07 07:45:41,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 07:45:41,578 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:41,578 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2021-11-07 07:45:41,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:41,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 07:45:41,794 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:41,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:41,795 INFO L85 PathProgramCache]: Analyzing trace with hash -361668197, now seen corresponding path program 5 times [2021-11-07 07:45:41,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:41,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499143860] [2021-11-07 07:45:41,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:41,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:42,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:42,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499143860] [2021-11-07 07:45:42,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499143860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:42,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162519291] [2021-11-07 07:45:42,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:45:42,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:42,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:42,112 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:42,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:45:42,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-07 07:45:42,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:42,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 07:45:42,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:42,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162519291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:42,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:42,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-11-07 07:45:42,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799063503] [2021-11-07 07:45:42,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 07:45:42,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:42,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 07:45:42,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-07 07:45:42,485 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:42,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:42,754 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2021-11-07 07:45:42,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:45:42,754 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 07:45:42,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:42,755 INFO L225 Difference]: With dead ends: 85 [2021-11-07 07:45:42,755 INFO L226 Difference]: Without dead ends: 84 [2021-11-07 07:45:42,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 07:45:42,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-07 07:45:42,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-11-07 07:45:42,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 69 states have internal predecessors, (70), 13 states have call successors, (13), 13 states have call predecessors, (13), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:42,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-11-07 07:45:42,763 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 69 [2021-11-07 07:45:42,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:42,763 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-11-07 07:45:42,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:42,764 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-11-07 07:45:42,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 07:45:42,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:42,765 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2021-11-07 07:45:42,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:42,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 07:45:42,990 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:42,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1721261803, now seen corresponding path program 5 times [2021-11-07 07:45:42,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:42,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925395724] [2021-11-07 07:45:42,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:42,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:43,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:43,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925395724] [2021-11-07 07:45:43,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925395724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:43,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676504434] [2021-11-07 07:45:43,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:45:43,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:43,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:43,323 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:43,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 07:45:43,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-07 07:45:43,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:43,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 07:45:43,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:43,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676504434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:43,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:43,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-11-07 07:45:43,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924815409] [2021-11-07 07:45:43,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 07:45:43,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:43,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 07:45:43,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-11-07 07:45:43,792 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 27 states, 25 states have (on average 2.52) internal successors, (63), 15 states have internal predecessors, (63), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:44,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:44,093 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2021-11-07 07:45:44,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 07:45:44,094 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.52) internal successors, (63), 15 states have internal predecessors, (63), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 07:45:44,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:44,095 INFO L225 Difference]: With dead ends: 91 [2021-11-07 07:45:44,095 INFO L226 Difference]: Without dead ends: 90 [2021-11-07 07:45:44,096 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=249, Invalid=1233, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 07:45:44,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-07 07:45:44,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-11-07 07:45:44,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 74 states have internal predecessors, (75), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:44,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-11-07 07:45:44,110 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 75 [2021-11-07 07:45:44,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:44,111 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-11-07 07:45:44,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.52) internal successors, (63), 15 states have internal predecessors, (63), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:44,112 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-11-07 07:45:44,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 07:45:44,114 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:44,114 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2021-11-07 07:45:44,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:44,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 07:45:44,315 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:44,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:44,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1136694515, now seen corresponding path program 6 times [2021-11-07 07:45:44,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:44,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760462510] [2021-11-07 07:45:44,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:44,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:44,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:44,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760462510] [2021-11-07 07:45:44,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760462510] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:44,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004054672] [2021-11-07 07:45:44,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:45:44,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:44,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:44,666 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:44,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 07:45:44,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-07 07:45:44,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:44,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 07:45:44,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:45,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004054672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:45,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:45,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-11-07 07:45:45,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737406565] [2021-11-07 07:45:45,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 07:45:45,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:45,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 07:45:45,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-11-07 07:45:45,196 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 29 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 16 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:45,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:45,521 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2021-11-07 07:45:45,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 07:45:45,522 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 16 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 07:45:45,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:45,522 INFO L225 Difference]: With dead ends: 97 [2021-11-07 07:45:45,522 INFO L226 Difference]: Without dead ends: 96 [2021-11-07 07:45:45,523 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:45:45,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-07 07:45:45,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-11-07 07:45:45,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 79 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:45,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-11-07 07:45:45,529 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 81 [2021-11-07 07:45:45,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:45,530 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-11-07 07:45:45,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 16 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:45,530 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-11-07 07:45:45,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 07:45:45,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:45,531 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2021-11-07 07:45:45,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:45,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 07:45:45,746 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:45,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:45,746 INFO L85 PathProgramCache]: Analyzing trace with hash -863892771, now seen corresponding path program 6 times [2021-11-07 07:45:45,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:45,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661208302] [2021-11-07 07:45:45,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:45,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:46,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:46,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661208302] [2021-11-07 07:45:46,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661208302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:46,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602056095] [2021-11-07 07:45:46,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:45:46,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:46,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:46,140 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:46,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 07:45:46,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-07 07:45:46,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:46,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 07:45:46,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:46,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602056095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:46,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:46,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-11-07 07:45:46,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405066339] [2021-11-07 07:45:46,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 07:45:46,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:46,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 07:45:46,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-11-07 07:45:46,653 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 31 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 17 states have internal predecessors, (73), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:47,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:47,027 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2021-11-07 07:45:47,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 07:45:47,028 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 17 states have internal predecessors, (73), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-07 07:45:47,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:47,031 INFO L225 Difference]: With dead ends: 103 [2021-11-07 07:45:47,031 INFO L226 Difference]: Without dead ends: 102 [2021-11-07 07:45:47,032 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=1655, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 07:45:47,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-07 07:45:47,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-11-07 07:45:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 84 states have internal predecessors, (85), 16 states have call successors, (16), 16 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-11-07 07:45:47,049 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 87 [2021-11-07 07:45:47,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:47,050 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-11-07 07:45:47,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 17 states have internal predecessors, (73), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:47,050 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-11-07 07:45:47,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 07:45:47,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:47,052 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-07 07:45:47,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:47,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 07:45:47,269 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:47,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:47,270 INFO L85 PathProgramCache]: Analyzing trace with hash 446749055, now seen corresponding path program 7 times [2021-11-07 07:45:47,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:47,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337932434] [2021-11-07 07:45:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:47,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:47,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:47,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337932434] [2021-11-07 07:45:47,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337932434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:47,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904901906] [2021-11-07 07:45:47,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:45:47,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:47,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:47,665 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:47,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 07:45:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:47,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 07:45:47,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:48,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904901906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:48,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:48,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-11-07 07:45:48,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286880767] [2021-11-07 07:45:48,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-07 07:45:48,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:48,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-07 07:45:48,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:45:48,180 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 33 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 18 states have internal predecessors, (78), 15 states have call successors, (15), 15 states have call predecessors, (15), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:48,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:48,595 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2021-11-07 07:45:48,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 07:45:48,596 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 18 states have internal predecessors, (78), 15 states have call successors, (15), 15 states have call predecessors, (15), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-07 07:45:48,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:48,597 INFO L225 Difference]: With dead ends: 109 [2021-11-07 07:45:48,597 INFO L226 Difference]: Without dead ends: 108 [2021-11-07 07:45:48,598 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=368, Invalid=1888, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 07:45:48,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-07 07:45:48,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-11-07 07:45:48,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 89 states have internal predecessors, (90), 17 states have call successors, (17), 17 states have call predecessors, (17), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:48,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-11-07 07:45:48,605 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 93 [2021-11-07 07:45:48,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:48,605 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-11-07 07:45:48,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 18 states have internal predecessors, (78), 15 states have call successors, (15), 15 states have call predecessors, (15), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:48,606 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-11-07 07:45:48,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 07:45:48,607 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:48,607 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2021-11-07 07:45:48,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:48,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 07:45:48,808 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:48,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:48,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1709220913, now seen corresponding path program 7 times [2021-11-07 07:45:48,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:48,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777878873] [2021-11-07 07:45:48,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:48,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:49,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:49,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777878873] [2021-11-07 07:45:49,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777878873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:49,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338433956] [2021-11-07 07:45:49,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:45:49,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:49,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:49,324 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:49,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 07:45:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:49,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 07:45:49,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:50,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338433956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:50,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:50,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-11-07 07:45:50,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368303293] [2021-11-07 07:45:50,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 07:45:50,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:50,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 07:45:50,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 07:45:50,026 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 35 states, 33 states have (on average 2.515151515151515) internal successors, (83), 19 states have internal predecessors, (83), 16 states have call successors, (16), 16 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:50,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:50,507 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2021-11-07 07:45:50,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 07:45:50,508 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.515151515151515) internal successors, (83), 19 states have internal predecessors, (83), 16 states have call successors, (16), 16 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-07 07:45:50,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:50,509 INFO L225 Difference]: With dead ends: 115 [2021-11-07 07:45:50,509 INFO L226 Difference]: Without dead ends: 114 [2021-11-07 07:45:50,510 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=411, Invalid=2139, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 07:45:50,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-07 07:45:50,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-11-07 07:45:50,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 93 states have (on average 1.021505376344086) internal successors, (95), 94 states have internal predecessors, (95), 18 states have call successors, (18), 18 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:50,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-11-07 07:45:50,517 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 99 [2021-11-07 07:45:50,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:50,517 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-11-07 07:45:50,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.515151515151515) internal successors, (83), 19 states have internal predecessors, (83), 16 states have call successors, (16), 16 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:50,518 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-11-07 07:45:50,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 07:45:50,521 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:50,521 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2021-11-07 07:45:50,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:50,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 07:45:50,744 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:50,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:50,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1923493105, now seen corresponding path program 8 times [2021-11-07 07:45:50,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:50,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727816991] [2021-11-07 07:45:50,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:50,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:51,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:51,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727816991] [2021-11-07 07:45:51,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727816991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:51,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359914859] [2021-11-07 07:45:51,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:45:51,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:51,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:51,282 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:51,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 07:45:51,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:45:51,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:51,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 07:45:51,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:52,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359914859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:52,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:52,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-11-07 07:45:52,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995496763] [2021-11-07 07:45:52,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-07 07:45:52,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:52,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-07 07:45:52,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 07:45:52,100 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 37 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 20 states have internal predecessors, (88), 17 states have call successors, (17), 17 states have call predecessors, (17), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:52,578 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2021-11-07 07:45:52,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-07 07:45:52,579 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 20 states have internal predecessors, (88), 17 states have call successors, (17), 17 states have call predecessors, (17), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-07 07:45:52,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:52,584 INFO L225 Difference]: With dead ends: 121 [2021-11-07 07:45:52,584 INFO L226 Difference]: Without dead ends: 120 [2021-11-07 07:45:52,585 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=2403, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 07:45:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-07 07:45:52,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-11-07 07:45:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 99 states have internal predecessors, (100), 19 states have call successors, (19), 19 states have call predecessors, (19), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:52,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-11-07 07:45:52,608 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 105 [2021-11-07 07:45:52,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:52,611 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-11-07 07:45:52,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 20 states have internal predecessors, (88), 17 states have call successors, (17), 17 states have call predecessors, (17), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:52,611 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-11-07 07:45:52,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 07:45:52,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:52,613 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2021-11-07 07:45:52,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:52,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:52,818 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:52,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:52,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1310773697, now seen corresponding path program 8 times [2021-11-07 07:45:52,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:52,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246102359] [2021-11-07 07:45:52,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:52,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 424 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:53,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:53,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246102359] [2021-11-07 07:45:53,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246102359] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:53,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104283619] [2021-11-07 07:45:53,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:45:53,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:53,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:53,362 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:53,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 07:45:53,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:45:53,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:53,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 07:45:53,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 424 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:54,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104283619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:54,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:54,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-11-07 07:45:54,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773167357] [2021-11-07 07:45:54,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 07:45:54,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:54,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 07:45:54,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1263, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 07:45:54,206 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 39 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 21 states have internal predecessors, (93), 18 states have call successors, (18), 18 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:54,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:54,705 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2021-11-07 07:45:54,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 07:45:54,706 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 21 states have internal predecessors, (93), 18 states have call successors, (18), 18 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-07 07:45:54,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:54,707 INFO L225 Difference]: With dead ends: 127 [2021-11-07 07:45:54,707 INFO L226 Difference]: Without dead ends: 126 [2021-11-07 07:45:54,709 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=507, Invalid=2685, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 07:45:54,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-07 07:45:54,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-11-07 07:45:54,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 104 states have internal predecessors, (105), 20 states have call successors, (20), 20 states have call predecessors, (20), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2021-11-07 07:45:54,717 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 111 [2021-11-07 07:45:54,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:54,717 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2021-11-07 07:45:54,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 21 states have internal predecessors, (93), 18 states have call successors, (18), 18 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:54,718 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2021-11-07 07:45:54,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 07:45:54,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:54,720 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1] [2021-11-07 07:45:54,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:54,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:54,934 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:54,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:54,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1667242653, now seen corresponding path program 9 times [2021-11-07 07:45:54,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:54,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817139941] [2021-11-07 07:45:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:54,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:55,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:55,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817139941] [2021-11-07 07:45:55,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817139941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:55,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637500575] [2021-11-07 07:45:55,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:45:55,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:55,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:55,559 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:55,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 07:45:56,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-07 07:45:56,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:56,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 07:45:56,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:56,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637500575] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:56,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:56,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2021-11-07 07:45:56,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438716147] [2021-11-07 07:45:56,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-07 07:45:56,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:56,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-07 07:45:56,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 07:45:56,409 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 41 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 22 states have internal predecessors, (98), 19 states have call successors, (19), 19 states have call predecessors, (19), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:56,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:56,970 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2021-11-07 07:45:56,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 07:45:56,971 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 22 states have internal predecessors, (98), 19 states have call successors, (19), 19 states have call predecessors, (19), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-07 07:45:56,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:56,972 INFO L225 Difference]: With dead ends: 133 [2021-11-07 07:45:56,972 INFO L226 Difference]: Without dead ends: 132 [2021-11-07 07:45:56,973 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=2980, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 07:45:56,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-07 07:45:56,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-11-07 07:45:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 109 states have internal predecessors, (110), 21 states have call successors, (21), 21 states have call predecessors, (21), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:56,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2021-11-07 07:45:56,982 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 117 [2021-11-07 07:45:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:56,983 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2021-11-07 07:45:56,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 22 states have internal predecessors, (98), 19 states have call successors, (19), 19 states have call predecessors, (19), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:56,983 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2021-11-07 07:45:56,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-07 07:45:56,985 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:56,985 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2021-11-07 07:45:57,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:57,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:57,210 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:57,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:57,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1651961011, now seen corresponding path program 9 times [2021-11-07 07:45:57,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:57,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974613776] [2021-11-07 07:45:57,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:57,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 531 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:57,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:57,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974613776] [2021-11-07 07:45:57,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974613776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:57,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480629678] [2021-11-07 07:45:57,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:45:57,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:57,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:57,813 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:57,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 07:45:58,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-07 07:45:58,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:58,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-07 07:45:58,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 531 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:58,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480629678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:58,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:58,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2021-11-07 07:45:58,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381698996] [2021-11-07 07:45:58,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 07:45:58,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:58,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 07:45:58,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 07:45:58,699 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 43 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 23 states have internal predecessors, (103), 20 states have call successors, (20), 20 states have call predecessors, (20), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:59,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:59,320 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2021-11-07 07:45:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 07:45:59,320 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 23 states have internal predecessors, (103), 20 states have call successors, (20), 20 states have call predecessors, (20), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-07 07:45:59,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:59,322 INFO L225 Difference]: With dead ends: 139 [2021-11-07 07:45:59,322 INFO L226 Difference]: Without dead ends: 138 [2021-11-07 07:45:59,324 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=613, Invalid=3293, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 07:45:59,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-07 07:45:59,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-11-07 07:45:59,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 114 states have internal predecessors, (115), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2021-11-07 07:45:59,333 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 123 [2021-11-07 07:45:59,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:59,333 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2021-11-07 07:45:59,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 23 states have internal predecessors, (103), 20 states have call successors, (20), 20 states have call predecessors, (20), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:59,334 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2021-11-07 07:45:59,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-07 07:45:59,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:59,335 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-07 07:45:59,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:59,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:59,562 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:45:59,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:59,562 INFO L85 PathProgramCache]: Analyzing trace with hash -65109291, now seen corresponding path program 10 times [2021-11-07 07:45:59,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:59,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414138599] [2021-11-07 07:45:59,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:59,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:00,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:00,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414138599] [2021-11-07 07:46:00,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414138599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:00,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668912603] [2021-11-07 07:46:00,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:46:00,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:00,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:00,194 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:00,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 07:46:00,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:46:00,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:00,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 07:46:00,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:01,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668912603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:01,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:01,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2021-11-07 07:46:01,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706607688] [2021-11-07 07:46:01,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-07 07:46:01,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:01,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-07 07:46:01,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1693, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 07:46:01,068 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand has 45 states, 43 states have (on average 2.511627906976744) internal successors, (108), 24 states have internal predecessors, (108), 21 states have call successors, (21), 21 states have call predecessors, (21), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:01,746 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2021-11-07 07:46:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-07 07:46:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.511627906976744) internal successors, (108), 24 states have internal predecessors, (108), 21 states have call successors, (21), 21 states have call predecessors, (21), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-11-07 07:46:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:01,749 INFO L225 Difference]: With dead ends: 145 [2021-11-07 07:46:01,749 INFO L226 Difference]: Without dead ends: 144 [2021-11-07 07:46:01,751 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=671, Invalid=3619, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 07:46:01,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-07 07:46:01,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2021-11-07 07:46:01,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 119 states have internal predecessors, (120), 23 states have call successors, (23), 23 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:01,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2021-11-07 07:46:01,762 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 129 [2021-11-07 07:46:01,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:01,763 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2021-11-07 07:46:01,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.511627906976744) internal successors, (108), 24 states have internal predecessors, (108), 21 states have call successors, (21), 21 states have call predecessors, (21), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:01,763 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2021-11-07 07:46:01,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-07 07:46:01,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:01,765 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2021-11-07 07:46:01,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 07:46:01,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 07:46:01,974 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:46:01,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:01,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1817324709, now seen corresponding path program 10 times [2021-11-07 07:46:01,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:01,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343713183] [2021-11-07 07:46:01,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:01,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:02,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:02,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343713183] [2021-11-07 07:46:02,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343713183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:02,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455812330] [2021-11-07 07:46:02,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:46:02,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:02,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:03,003 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:03,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 07:46:03,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:46:03,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:03,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 07:46:03,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:04,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455812330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:04,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:04,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2021-11-07 07:46:04,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803135328] [2021-11-07 07:46:04,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-07 07:46:04,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:04,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-07 07:46:04,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1851, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 07:46:04,112 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand has 47 states, 45 states have (on average 2.511111111111111) internal successors, (113), 25 states have internal predecessors, (113), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:04,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:04,874 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2021-11-07 07:46:04,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 07:46:04,875 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 2.511111111111111) internal successors, (113), 25 states have internal predecessors, (113), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-11-07 07:46:04,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:04,877 INFO L225 Difference]: With dead ends: 151 [2021-11-07 07:46:04,877 INFO L226 Difference]: Without dead ends: 150 [2021-11-07 07:46:04,879 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=729, Invalid=3963, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 07:46:04,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-07 07:46:04,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-11-07 07:46:04,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 123 states have (on average 1.016260162601626) internal successors, (125), 124 states have internal predecessors, (125), 24 states have call successors, (24), 24 states have call predecessors, (24), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:04,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2021-11-07 07:46:04,891 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 135 [2021-11-07 07:46:04,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:04,892 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2021-11-07 07:46:04,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 2.511111111111111) internal successors, (113), 25 states have internal predecessors, (113), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:04,893 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2021-11-07 07:46:04,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-07 07:46:04,894 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:04,895 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2021-11-07 07:46:04,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-07 07:46:05,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:05,117 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:46:05,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:05,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1611496121, now seen corresponding path program 11 times [2021-11-07 07:46:05,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:05,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328416859] [2021-11-07 07:46:05,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:05,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:06,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:06,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328416859] [2021-11-07 07:46:06,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328416859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:06,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031333665] [2021-11-07 07:46:06,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:46:06,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:06,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:06,032 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:06,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 07:46:06,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-07 07:46:06,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:06,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 07:46:06,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:07,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031333665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:07,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:07,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2021-11-07 07:46:07,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979445011] [2021-11-07 07:46:07,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 07:46:07,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:07,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 07:46:07,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=2015, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 07:46:07,068 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand has 49 states, 47 states have (on average 2.5106382978723403) internal successors, (118), 26 states have internal predecessors, (118), 23 states have call successors, (23), 23 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:07,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:07,681 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2021-11-07 07:46:07,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-07 07:46:07,681 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.5106382978723403) internal successors, (118), 26 states have internal predecessors, (118), 23 states have call successors, (23), 23 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-07 07:46:07,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:07,683 INFO L225 Difference]: With dead ends: 157 [2021-11-07 07:46:07,683 INFO L226 Difference]: Without dead ends: 156 [2021-11-07 07:46:07,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=792, Invalid=4320, Unknown=0, NotChecked=0, Total=5112 [2021-11-07 07:46:07,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-07 07:46:07,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-11-07 07:46:07,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 128 states have (on average 1.015625) internal successors, (130), 129 states have internal predecessors, (130), 25 states have call successors, (25), 25 states have call predecessors, (25), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:07,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2021-11-07 07:46:07,695 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 141 [2021-11-07 07:46:07,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:07,695 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2021-11-07 07:46:07,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.5106382978723403) internal successors, (118), 26 states have internal predecessors, (118), 23 states have call successors, (23), 23 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:07,696 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2021-11-07 07:46:07,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-07 07:46:07,697 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:07,698 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2021-11-07 07:46:07,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 07:46:07,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:07,918 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:46:07,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:07,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1008931223, now seen corresponding path program 11 times [2021-11-07 07:46:07,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:07,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982020823] [2021-11-07 07:46:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:07,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 0 proven. 781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:08,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:08,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982020823] [2021-11-07 07:46:08,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982020823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:08,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720893720] [2021-11-07 07:46:08,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:46:08,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:08,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:08,682 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:08,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 07:46:09,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-07 07:46:09,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:09,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-07 07:46:09,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:09,660 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 0 proven. 781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:09,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720893720] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:09,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:09,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2021-11-07 07:46:09,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785680047] [2021-11-07 07:46:09,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-07 07:46:09,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:09,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-07 07:46:09,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=2187, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 07:46:09,663 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand has 51 states, 49 states have (on average 2.510204081632653) internal successors, (123), 27 states have internal predecessors, (123), 24 states have call successors, (24), 24 states have call predecessors, (24), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:10,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:10,374 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2021-11-07 07:46:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 07:46:10,375 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 2.510204081632653) internal successors, (123), 27 states have internal predecessors, (123), 24 states have call successors, (24), 24 states have call predecessors, (24), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-07 07:46:10,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:10,376 INFO L225 Difference]: With dead ends: 163 [2021-11-07 07:46:10,376 INFO L226 Difference]: Without dead ends: 162 [2021-11-07 07:46:10,376 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=855, Invalid=4695, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 07:46:10,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-07 07:46:10,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2021-11-07 07:46:10,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 134 states have internal predecessors, (135), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2021-11-07 07:46:10,385 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 147 [2021-11-07 07:46:10,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:10,385 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2021-11-07 07:46:10,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 2.510204081632653) internal successors, (123), 27 states have internal predecessors, (123), 24 states have call successors, (24), 24 states have call predecessors, (24), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2021-11-07 07:46:10,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-07 07:46:10,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:10,388 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2021-11-07 07:46:10,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 07:46:10,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-07 07:46:10,604 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:46:10,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:10,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1647078585, now seen corresponding path program 12 times [2021-11-07 07:46:10,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:10,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789108618] [2021-11-07 07:46:10,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:10,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:11,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:11,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789108618] [2021-11-07 07:46:11,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789108618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:11,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503574253] [2021-11-07 07:46:11,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:46:11,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:11,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:11,428 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:11,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 07:46:12,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-07 07:46:12,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:12,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-07 07:46:12,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:12,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503574253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:12,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:12,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2021-11-07 07:46:12,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587361215] [2021-11-07 07:46:12,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-07 07:46:12,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:12,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-07 07:46:12,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=2365, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 07:46:12,547 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand has 53 states, 51 states have (on average 2.5098039215686274) internal successors, (128), 28 states have internal predecessors, (128), 25 states have call successors, (25), 25 states have call predecessors, (25), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:13,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:13,427 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2021-11-07 07:46:13,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-07 07:46:13,427 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 2.5098039215686274) internal successors, (128), 28 states have internal predecessors, (128), 25 states have call successors, (25), 25 states have call predecessors, (25), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-11-07 07:46:13,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:13,429 INFO L225 Difference]: With dead ends: 169 [2021-11-07 07:46:13,429 INFO L226 Difference]: Without dead ends: 168 [2021-11-07 07:46:13,430 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=923, Invalid=5083, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 07:46:13,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-07 07:46:13,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2021-11-07 07:46:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 139 states have internal predecessors, (140), 27 states have call successors, (27), 27 states have call predecessors, (27), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2021-11-07 07:46:13,443 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 153 [2021-11-07 07:46:13,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:13,444 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2021-11-07 07:46:13,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 2.5098039215686274) internal successors, (128), 28 states have internal predecessors, (128), 25 states have call successors, (25), 25 states have call predecessors, (25), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:13,444 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2021-11-07 07:46:13,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-07 07:46:13,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:13,447 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2021-11-07 07:46:13,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-07 07:46:13,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 07:46:13,662 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:46:13,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:13,662 INFO L85 PathProgramCache]: Analyzing trace with hash -40232055, now seen corresponding path program 12 times [2021-11-07 07:46:13,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:13,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293743890] [2021-11-07 07:46:13,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:13,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:14,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:14,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293743890] [2021-11-07 07:46:14,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293743890] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:14,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326417052] [2021-11-07 07:46:14,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:46:14,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:14,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:14,493 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:14,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 07:46:15,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-07 07:46:15,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:15,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-07 07:46:15,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:15,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326417052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:15,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:15,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2021-11-07 07:46:15,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006929526] [2021-11-07 07:46:15,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-07 07:46:15,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:15,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-07 07:46:15,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=2551, Unknown=0, NotChecked=0, Total=2970 [2021-11-07 07:46:15,630 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand has 55 states, 53 states have (on average 2.509433962264151) internal successors, (133), 29 states have internal predecessors, (133), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:16,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:16,325 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2021-11-07 07:46:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-07 07:46:16,325 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 2.509433962264151) internal successors, (133), 29 states have internal predecessors, (133), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-11-07 07:46:16,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:16,327 INFO L225 Difference]: With dead ends: 175 [2021-11-07 07:46:16,327 INFO L226 Difference]: Without dead ends: 174 [2021-11-07 07:46:16,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=991, Invalid=5489, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 07:46:16,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-07 07:46:16,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2021-11-07 07:46:16,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 143 states have (on average 1.013986013986014) internal successors, (145), 144 states have internal predecessors, (145), 28 states have call successors, (28), 28 states have call predecessors, (28), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:16,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2021-11-07 07:46:16,338 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 159 [2021-11-07 07:46:16,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:16,338 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2021-11-07 07:46:16,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 2.509433962264151) internal successors, (133), 29 states have internal predecessors, (133), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:16,339 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2021-11-07 07:46:16,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-07 07:46:16,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:16,340 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1] [2021-11-07 07:46:16,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-07 07:46:16,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 07:46:16,562 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:46:16,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:16,562 INFO L85 PathProgramCache]: Analyzing trace with hash 136100139, now seen corresponding path program 13 times [2021-11-07 07:46:16,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:16,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93022706] [2021-11-07 07:46:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:16,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:17,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:17,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93022706] [2021-11-07 07:46:17,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93022706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:17,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636051036] [2021-11-07 07:46:17,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:46:17,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:17,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:17,561 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:17,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 07:46:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:18,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-07 07:46:18,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:18,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636051036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:18,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:18,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2021-11-07 07:46:18,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888125312] [2021-11-07 07:46:18,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-07 07:46:18,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:18,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-07 07:46:18,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=2743, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 07:46:18,774 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand has 57 states, 55 states have (on average 2.5090909090909093) internal successors, (138), 30 states have internal predecessors, (138), 27 states have call successors, (27), 27 states have call predecessors, (27), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:19,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:19,604 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2021-11-07 07:46:19,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-07 07:46:19,604 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 2.5090909090909093) internal successors, (138), 30 states have internal predecessors, (138), 27 states have call successors, (27), 27 states have call predecessors, (27), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-11-07 07:46:19,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:19,606 INFO L225 Difference]: With dead ends: 181 [2021-11-07 07:46:19,606 INFO L226 Difference]: Without dead ends: 180 [2021-11-07 07:46:19,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1064, Invalid=5908, Unknown=0, NotChecked=0, Total=6972 [2021-11-07 07:46:19,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-07 07:46:19,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2021-11-07 07:46:19,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 149 states have internal predecessors, (150), 29 states have call successors, (29), 29 states have call predecessors, (29), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:19,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2021-11-07 07:46:19,623 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 165 [2021-11-07 07:46:19,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:19,623 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2021-11-07 07:46:19,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 2.5090909090909093) internal successors, (138), 30 states have internal predecessors, (138), 27 states have call successors, (27), 27 states have call predecessors, (27), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:19,624 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2021-11-07 07:46:19,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-07 07:46:19,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:19,625 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2021-11-07 07:46:19,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 07:46:19,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 07:46:19,846 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:46:19,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:19,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1470614139, now seen corresponding path program 13 times [2021-11-07 07:46:19,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:19,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398614855] [2021-11-07 07:46:19,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:19,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 0 proven. 1079 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:20,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:20,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398614855] [2021-11-07 07:46:20,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398614855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:20,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093227427] [2021-11-07 07:46:20,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:46:20,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:20,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:20,931 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:20,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 07:46:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:21,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-07 07:46:21,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 0 proven. 1079 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:22,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093227427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:22,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:22,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2021-11-07 07:46:22,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57155521] [2021-11-07 07:46:22,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-07 07:46:22,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:22,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-07 07:46:22,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=2943, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 07:46:22,266 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand has 59 states, 57 states have (on average 2.508771929824561) internal successors, (143), 31 states have internal predecessors, (143), 28 states have call successors, (28), 28 states have call predecessors, (28), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:23,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:23,098 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2021-11-07 07:46:23,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-07 07:46:23,099 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 57 states have (on average 2.508771929824561) internal successors, (143), 31 states have internal predecessors, (143), 28 states have call successors, (28), 28 states have call predecessors, (28), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2021-11-07 07:46:23,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:23,101 INFO L225 Difference]: With dead ends: 187 [2021-11-07 07:46:23,101 INFO L226 Difference]: Without dead ends: 186 [2021-11-07 07:46:23,103 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1137, Invalid=6345, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 07:46:23,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-07 07:46:23,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-11-07 07:46:23,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 154 states have internal predecessors, (155), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2021-11-07 07:46:23,117 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 171 [2021-11-07 07:46:23,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:23,118 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2021-11-07 07:46:23,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 57 states have (on average 2.508771929824561) internal successors, (143), 31 states have internal predecessors, (143), 28 states have call successors, (28), 28 states have call predecessors, (28), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:23,119 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2021-11-07 07:46:23,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-07 07:46:23,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:23,120 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2021-11-07 07:46:23,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 07:46:23,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:23,334 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:46:23,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:23,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1649666717, now seen corresponding path program 14 times [2021-11-07 07:46:23,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:23,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820506660] [2021-11-07 07:46:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:23,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:24,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:24,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820506660] [2021-11-07 07:46:24,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820506660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:24,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568762906] [2021-11-07 07:46:24,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:46:24,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:24,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:24,449 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:24,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 07:46:25,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:46:25,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:25,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-07 07:46:25,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:25,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568762906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:25,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:25,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2021-11-07 07:46:25,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786733947] [2021-11-07 07:46:25,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-07 07:46:25,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:25,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-07 07:46:25,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=3149, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 07:46:25,774 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand has 61 states, 59 states have (on average 2.5084745762711864) internal successors, (148), 32 states have internal predecessors, (148), 29 states have call successors, (29), 29 states have call predecessors, (29), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:26,656 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2021-11-07 07:46:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-07 07:46:26,657 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 59 states have (on average 2.5084745762711864) internal successors, (148), 32 states have internal predecessors, (148), 29 states have call successors, (29), 29 states have call predecessors, (29), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-11-07 07:46:26,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:26,658 INFO L225 Difference]: With dead ends: 193 [2021-11-07 07:46:26,658 INFO L226 Difference]: Without dead ends: 192 [2021-11-07 07:46:26,660 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1215, Invalid=6795, Unknown=0, NotChecked=0, Total=8010 [2021-11-07 07:46:26,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-07 07:46:26,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2021-11-07 07:46:26,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 159 states have internal predecessors, (160), 31 states have call successors, (31), 31 states have call predecessors, (31), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2021-11-07 07:46:26,673 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 177 [2021-11-07 07:46:26,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:26,673 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2021-11-07 07:46:26,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 59 states have (on average 2.5084745762711864) internal successors, (148), 32 states have internal predecessors, (148), 29 states have call successors, (29), 29 states have call predecessors, (29), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:26,674 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2021-11-07 07:46:26,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-07 07:46:26,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:26,675 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2021-11-07 07:46:26,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-07 07:46:26,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:26,890 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:46:26,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:26,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1937990035, now seen corresponding path program 14 times [2021-11-07 07:46:26,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:26,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923294509] [2021-11-07 07:46:26,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:26,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 0 proven. 1246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:28,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:28,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923294509] [2021-11-07 07:46:28,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923294509] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:28,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987413490] [2021-11-07 07:46:28,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:46:28,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:28,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:28,003 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:28,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 07:46:28,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:46:28,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:28,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-07 07:46:28,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 0 proven. 1246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:29,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987413490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:29,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:29,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2021-11-07 07:46:29,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846760051] [2021-11-07 07:46:29,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-07 07:46:29,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:29,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-07 07:46:29,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=3363, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 07:46:29,418 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand has 63 states, 61 states have (on average 2.5081967213114753) internal successors, (153), 33 states have internal predecessors, (153), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:30,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:30,344 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2021-11-07 07:46:30,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-07 07:46:30,346 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 61 states have (on average 2.5081967213114753) internal successors, (153), 33 states have internal predecessors, (153), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2021-11-07 07:46:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:30,348 INFO L225 Difference]: With dead ends: 199 [2021-11-07 07:46:30,348 INFO L226 Difference]: Without dead ends: 198 [2021-11-07 07:46:30,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1293, Invalid=7263, Unknown=0, NotChecked=0, Total=8556 [2021-11-07 07:46:30,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-07 07:46:30,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2021-11-07 07:46:30,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 164 states have internal predecessors, (165), 32 states have call successors, (32), 32 states have call predecessors, (32), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:30,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2021-11-07 07:46:30,363 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 183 [2021-11-07 07:46:30,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:30,363 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2021-11-07 07:46:30,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 61 states have (on average 2.5081967213114753) internal successors, (153), 33 states have internal predecessors, (153), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:30,364 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2021-11-07 07:46:30,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-07 07:46:30,365 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:30,365 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2021-11-07 07:46:30,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 07:46:30,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-07 07:46:30,582 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:46:30,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:30,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1822589199, now seen corresponding path program 15 times [2021-11-07 07:46:30,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:30,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837125277] [2021-11-07 07:46:30,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:30,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:31,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:31,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837125277] [2021-11-07 07:46:31,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837125277] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:31,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172639906] [2021-11-07 07:46:31,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:46:31,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:31,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:31,747 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:31,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 07:46:32,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-07 07:46:32,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:32,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-07 07:46:32,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:33,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172639906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:33,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:33,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2021-11-07 07:46:33,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369538096] [2021-11-07 07:46:33,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-07 07:46:33,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:33,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-07 07:46:33,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=3583, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 07:46:33,395 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand has 65 states, 63 states have (on average 2.507936507936508) internal successors, (158), 34 states have internal predecessors, (158), 31 states have call successors, (31), 31 states have call predecessors, (31), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:34,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:34,588 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2021-11-07 07:46:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-07 07:46:34,589 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 63 states have (on average 2.507936507936508) internal successors, (158), 34 states have internal predecessors, (158), 31 states have call successors, (31), 31 states have call predecessors, (31), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-11-07 07:46:34,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:34,590 INFO L225 Difference]: With dead ends: 205 [2021-11-07 07:46:34,590 INFO L226 Difference]: Without dead ends: 204 [2021-11-07 07:46:34,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1726 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1376, Invalid=7744, Unknown=0, NotChecked=0, Total=9120 [2021-11-07 07:46:34,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-07 07:46:34,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2021-11-07 07:46:34,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 169 states have internal predecessors, (170), 33 states have call successors, (33), 33 states have call predecessors, (33), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:34,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2021-11-07 07:46:34,609 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 189 [2021-11-07 07:46:34,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:34,610 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2021-11-07 07:46:34,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 63 states have (on average 2.507936507936508) internal successors, (158), 34 states have internal predecessors, (158), 31 states have call successors, (31), 31 states have call predecessors, (31), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:34,610 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2021-11-07 07:46:34,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-07 07:46:34,612 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:34,612 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1] [2021-11-07 07:46:34,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-07 07:46:34,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:34,826 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:46:34,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:34,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1719068833, now seen corresponding path program 15 times [2021-11-07 07:46:34,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:34,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273045323] [2021-11-07 07:46:34,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:34,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 1425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:36,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:36,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273045323] [2021-11-07 07:46:36,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273045323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:36,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249120595] [2021-11-07 07:46:36,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:46:36,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:36,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:36,392 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:36,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 07:46:37,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-07 07:46:37,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:37,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-07 07:46:37,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 1425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:38,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249120595] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:38,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:38,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2021-11-07 07:46:38,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168090840] [2021-11-07 07:46:38,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-07 07:46:38,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:38,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-07 07:46:38,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=3811, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 07:46:38,013 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand has 67 states, 65 states have (on average 2.5076923076923077) internal successors, (163), 35 states have internal predecessors, (163), 32 states have call successors, (32), 32 states have call predecessors, (32), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:39,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:39,374 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2021-11-07 07:46:39,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-07 07:46:39,375 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 65 states have (on average 2.5076923076923077) internal successors, (163), 35 states have internal predecessors, (163), 32 states have call successors, (32), 32 states have call predecessors, (32), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-07 07:46:39,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:39,376 INFO L225 Difference]: With dead ends: 211 [2021-11-07 07:46:39,376 INFO L226 Difference]: Without dead ends: 210 [2021-11-07 07:46:39,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1459, Invalid=8243, Unknown=0, NotChecked=0, Total=9702 [2021-11-07 07:46:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-07 07:46:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2021-11-07 07:46:39,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 173 states have (on average 1.0115606936416186) internal successors, (175), 174 states have internal predecessors, (175), 34 states have call successors, (34), 34 states have call predecessors, (34), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:39,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2021-11-07 07:46:39,391 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 195 [2021-11-07 07:46:39,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:39,392 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2021-11-07 07:46:39,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 65 states have (on average 2.5076923076923077) internal successors, (163), 35 states have internal predecessors, (163), 32 states have call successors, (32), 32 states have call predecessors, (32), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:39,392 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2021-11-07 07:46:39,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-07 07:46:39,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:39,394 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2021-11-07 07:46:39,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 07:46:39,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-07 07:46:39,613 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:46:39,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:39,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1847131265, now seen corresponding path program 16 times [2021-11-07 07:46:39,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:39,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576749246] [2021-11-07 07:46:39,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:39,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:41,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:41,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576749246] [2021-11-07 07:46:41,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576749246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:41,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865996834] [2021-11-07 07:46:41,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:46:41,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:41,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:41,304 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:41,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 07:46:42,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:46:42,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:42,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-07 07:46:42,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:43,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865996834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:43,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:43,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2021-11-07 07:46:43,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100325868] [2021-11-07 07:46:43,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-07 07:46:43,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:43,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-07 07:46:43,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=4045, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 07:46:43,047 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand has 69 states, 67 states have (on average 2.5074626865671643) internal successors, (168), 36 states have internal predecessors, (168), 33 states have call successors, (33), 33 states have call predecessors, (33), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:44,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:44,109 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2021-11-07 07:46:44,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-07 07:46:44,115 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 67 states have (on average 2.5074626865671643) internal successors, (168), 36 states have internal predecessors, (168), 33 states have call successors, (33), 33 states have call predecessors, (33), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-11-07 07:46:44,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:44,116 INFO L225 Difference]: With dead ends: 217 [2021-11-07 07:46:44,116 INFO L226 Difference]: Without dead ends: 216 [2021-11-07 07:46:44,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1969 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1547, Invalid=8755, Unknown=0, NotChecked=0, Total=10302 [2021-11-07 07:46:44,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-07 07:46:44,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2021-11-07 07:46:44,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 179 states have internal predecessors, (180), 35 states have call successors, (35), 35 states have call predecessors, (35), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:44,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2021-11-07 07:46:44,131 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 201 [2021-11-07 07:46:44,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:44,131 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2021-11-07 07:46:44,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 67 states have (on average 2.5074626865671643) internal successors, (168), 36 states have internal predecessors, (168), 33 states have call successors, (33), 33 states have call predecessors, (33), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:44,132 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2021-11-07 07:46:44,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-07 07:46:44,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:44,133 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1] [2021-11-07 07:46:44,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-07 07:46:44,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-07 07:46:44,361 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:46:44,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:44,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1467856209, now seen corresponding path program 16 times [2021-11-07 07:46:44,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:44,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673133024] [2021-11-07 07:46:44,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:44,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 0 proven. 1616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:45,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:45,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673133024] [2021-11-07 07:46:45,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673133024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:45,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121898500] [2021-11-07 07:46:45,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:46:45,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:45,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:45,791 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:45,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 07:46:46,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:46:46,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:46,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-07 07:46:46,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 0 proven. 1616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:47,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121898500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:47,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:47,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2021-11-07 07:46:47,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719374540] [2021-11-07 07:46:47,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-07 07:46:47,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:47,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-07 07:46:47,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=4287, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 07:46:47,513 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand has 71 states, 69 states have (on average 2.5072463768115942) internal successors, (173), 37 states have internal predecessors, (173), 34 states have call successors, (34), 34 states have call predecessors, (34), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:48,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:48,710 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2021-11-07 07:46:48,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-07 07:46:48,711 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 69 states have (on average 2.5072463768115942) internal successors, (173), 37 states have internal predecessors, (173), 34 states have call successors, (34), 34 states have call predecessors, (34), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2021-11-07 07:46:48,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:48,713 INFO L225 Difference]: With dead ends: 223 [2021-11-07 07:46:48,713 INFO L226 Difference]: Without dead ends: 222 [2021-11-07 07:46:48,714 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2097 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1635, Invalid=9285, Unknown=0, NotChecked=0, Total=10920 [2021-11-07 07:46:48,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-07 07:46:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2021-11-07 07:46:48,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 183 states have (on average 1.010928961748634) internal successors, (185), 184 states have internal predecessors, (185), 36 states have call successors, (36), 36 states have call predecessors, (36), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:48,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2021-11-07 07:46:48,734 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 207 [2021-11-07 07:46:48,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:48,735 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2021-11-07 07:46:48,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 69 states have (on average 2.5072463768115942) internal successors, (173), 37 states have internal predecessors, (173), 34 states have call successors, (34), 34 states have call predecessors, (34), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:48,736 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2021-11-07 07:46:48,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-07 07:46:48,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:48,738 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1] [2021-11-07 07:46:48,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 07:46:48,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-07 07:46:48,965 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:46:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:48,966 INFO L85 PathProgramCache]: Analyzing trace with hash 419945715, now seen corresponding path program 17 times [2021-11-07 07:46:48,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:48,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667629431] [2021-11-07 07:46:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:48,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:50,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:50,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667629431] [2021-11-07 07:46:50,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667629431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:50,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456050225] [2021-11-07 07:46:50,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:46:50,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:50,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:50,774 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:50,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 07:46:52,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-07 07:46:52,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:52,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-07 07:46:52,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:52,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456050225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:52,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:52,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2021-11-07 07:46:52,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976948765] [2021-11-07 07:46:52,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-07 07:46:52,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:52,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-07 07:46:52,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=721, Invalid=4535, Unknown=0, NotChecked=0, Total=5256 [2021-11-07 07:46:52,665 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand has 73 states, 71 states have (on average 2.507042253521127) internal successors, (178), 38 states have internal predecessors, (178), 35 states have call successors, (35), 35 states have call predecessors, (35), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:54,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:54,038 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2021-11-07 07:46:54,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-07 07:46:54,039 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 71 states have (on average 2.507042253521127) internal successors, (178), 38 states have internal predecessors, (178), 35 states have call successors, (35), 35 states have call predecessors, (35), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2021-11-07 07:46:54,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:54,040 INFO L225 Difference]: With dead ends: 229 [2021-11-07 07:46:54,040 INFO L226 Difference]: Without dead ends: 228 [2021-11-07 07:46:54,041 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2228 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1728, Invalid=9828, Unknown=0, NotChecked=0, Total=11556 [2021-11-07 07:46:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-07 07:46:54,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2021-11-07 07:46:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 189 states have internal predecessors, (190), 37 states have call successors, (37), 37 states have call predecessors, (37), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:54,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2021-11-07 07:46:54,059 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 213 [2021-11-07 07:46:54,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:54,060 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2021-11-07 07:46:54,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 71 states have (on average 2.507042253521127) internal successors, (178), 38 states have internal predecessors, (178), 35 states have call successors, (35), 35 states have call predecessors, (35), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:54,060 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2021-11-07 07:46:54,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-07 07:46:54,062 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:54,063 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2021-11-07 07:46:54,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-07 07:46:54,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-07 07:46:54,270 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:46:54,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:54,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1706362813, now seen corresponding path program 17 times [2021-11-07 07:46:54,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:54,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042399328] [2021-11-07 07:46:54,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:54,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1819 backedges. 0 proven. 1819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:56,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:56,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042399328] [2021-11-07 07:46:56,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042399328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:56,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368535072] [2021-11-07 07:46:56,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:46:56,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:56,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:56,082 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:56,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 07:46:57,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-07 07:46:57,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:57,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-07 07:46:57,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1819 backedges. 0 proven. 1819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:58,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368535072] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:58,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:58,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2021-11-07 07:46:58,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079964627] [2021-11-07 07:46:58,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-07 07:46:58,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:58,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-07 07:46:58,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=4791, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 07:46:58,410 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand has 75 states, 73 states have (on average 2.506849315068493) internal successors, (183), 39 states have internal predecessors, (183), 36 states have call successors, (36), 36 states have call predecessors, (36), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:59,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:59,868 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2021-11-07 07:46:59,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-07 07:46:59,868 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 73 states have (on average 2.506849315068493) internal successors, (183), 39 states have internal predecessors, (183), 36 states have call successors, (36), 36 states have call predecessors, (36), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2021-11-07 07:46:59,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:59,869 INFO L225 Difference]: With dead ends: 235 [2021-11-07 07:46:59,869 INFO L226 Difference]: Without dead ends: 234 [2021-11-07 07:46:59,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2364 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1821, Invalid=10389, Unknown=0, NotChecked=0, Total=12210 [2021-11-07 07:46:59,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-07 07:46:59,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2021-11-07 07:46:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 193 states have (on average 1.0103626943005182) internal successors, (195), 194 states have internal predecessors, (195), 38 states have call successors, (38), 38 states have call predecessors, (38), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:59,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2021-11-07 07:46:59,888 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 219 [2021-11-07 07:46:59,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:59,888 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2021-11-07 07:46:59,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 73 states have (on average 2.506849315068493) internal successors, (183), 39 states have internal predecessors, (183), 36 states have call successors, (36), 36 states have call predecessors, (36), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:59,889 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2021-11-07 07:46:59,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-07 07:46:59,890 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:59,891 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1] [2021-11-07 07:46:59,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:00,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:00,114 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:47:00,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:00,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1426087323, now seen corresponding path program 18 times [2021-11-07 07:47:00,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:00,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791253074] [2021-11-07 07:47:00,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:00,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:01,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:01,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791253074] [2021-11-07 07:47:01,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791253074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:01,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107011500] [2021-11-07 07:47:01,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:47:01,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:01,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:01,793 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:01,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 07:47:03,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-07 07:47:03,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:03,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-07 07:47:03,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:03,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107011500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:03,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:03,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2021-11-07 07:47:03,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803269238] [2021-11-07 07:47:03,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-07 07:47:03,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:03,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-07 07:47:03,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=799, Invalid=5053, Unknown=0, NotChecked=0, Total=5852 [2021-11-07 07:47:03,789 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand has 77 states, 75 states have (on average 2.506666666666667) internal successors, (188), 40 states have internal predecessors, (188), 37 states have call successors, (37), 37 states have call predecessors, (37), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:05,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:05,098 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2021-11-07 07:47:05,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-07 07:47:05,099 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 75 states have (on average 2.506666666666667) internal successors, (188), 40 states have internal predecessors, (188), 37 states have call successors, (37), 37 states have call predecessors, (37), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-11-07 07:47:05,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:05,100 INFO L225 Difference]: With dead ends: 241 [2021-11-07 07:47:05,100 INFO L226 Difference]: Without dead ends: 240 [2021-11-07 07:47:05,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2503 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1919, Invalid=10963, Unknown=0, NotChecked=0, Total=12882 [2021-11-07 07:47:05,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-07 07:47:05,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2021-11-07 07:47:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 198 states have (on average 1.0101010101010102) internal successors, (200), 199 states have internal predecessors, (200), 39 states have call successors, (39), 39 states have call predecessors, (39), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2021-11-07 07:47:05,120 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 225 [2021-11-07 07:47:05,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:05,120 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2021-11-07 07:47:05,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 75 states have (on average 2.506666666666667) internal successors, (188), 40 states have internal predecessors, (188), 37 states have call successors, (37), 37 states have call predecessors, (37), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:05,121 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2021-11-07 07:47:05,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-07 07:47:05,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:05,122 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2021-11-07 07:47:05,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:05,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-07 07:47:05,350 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:47:05,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:05,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1361141813, now seen corresponding path program 18 times [2021-11-07 07:47:05,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:05,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758208330] [2021-11-07 07:47:05,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:05,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2034 backedges. 0 proven. 2034 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:07,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:07,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758208330] [2021-11-07 07:47:07,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758208330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:07,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019201009] [2021-11-07 07:47:07,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:47:07,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:07,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:07,021 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:07,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 07:47:08,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-07 07:47:08,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:08,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-07 07:47:08,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2034 backedges. 0 proven. 2034 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:09,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019201009] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:09,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:09,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2021-11-07 07:47:09,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981286422] [2021-11-07 07:47:09,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-07 07:47:09,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:09,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-07 07:47:09,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=5323, Unknown=0, NotChecked=0, Total=6162 [2021-11-07 07:47:09,081 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand has 79 states, 77 states have (on average 2.5064935064935066) internal successors, (193), 41 states have internal predecessors, (193), 38 states have call successors, (38), 38 states have call predecessors, (38), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:10,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:10,436 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2021-11-07 07:47:10,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-07 07:47:10,436 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 77 states have (on average 2.5064935064935066) internal successors, (193), 41 states have internal predecessors, (193), 38 states have call successors, (38), 38 states have call predecessors, (38), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2021-11-07 07:47:10,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:10,437 INFO L225 Difference]: With dead ends: 247 [2021-11-07 07:47:10,437 INFO L226 Difference]: Without dead ends: 246 [2021-11-07 07:47:10,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2017, Invalid=11555, Unknown=0, NotChecked=0, Total=13572 [2021-11-07 07:47:10,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-07 07:47:10,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2021-11-07 07:47:10,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 203 states have (on average 1.0098522167487685) internal successors, (205), 204 states have internal predecessors, (205), 40 states have call successors, (40), 40 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2021-11-07 07:47:10,457 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 231 [2021-11-07 07:47:10,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:10,457 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2021-11-07 07:47:10,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 77 states have (on average 2.5064935064935066) internal successors, (193), 41 states have internal predecessors, (193), 38 states have call successors, (38), 38 states have call predecessors, (38), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:10,458 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2021-11-07 07:47:10,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-07 07:47:10,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:10,460 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1] [2021-11-07 07:47:10,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:10,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-07 07:47:10,674 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:47:10,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:10,674 INFO L85 PathProgramCache]: Analyzing trace with hash 215010519, now seen corresponding path program 19 times [2021-11-07 07:47:10,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:10,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795852331] [2021-11-07 07:47:10,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:10,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:12,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:12,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795852331] [2021-11-07 07:47:12,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795852331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:12,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954776669] [2021-11-07 07:47:12,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:47:12,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:12,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:12,547 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:12,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 07:47:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:14,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-07 07:47:14,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:14,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954776669] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:14,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:14,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2021-11-07 07:47:14,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761590354] [2021-11-07 07:47:14,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-07 07:47:14,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:14,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-07 07:47:14,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=881, Invalid=5599, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 07:47:14,730 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand has 81 states, 79 states have (on average 2.5063291139240507) internal successors, (198), 42 states have internal predecessors, (198), 39 states have call successors, (39), 39 states have call predecessors, (39), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:16,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:16,369 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2021-11-07 07:47:16,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-07 07:47:16,369 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 79 states have (on average 2.5063291139240507) internal successors, (198), 42 states have internal predecessors, (198), 39 states have call successors, (39), 39 states have call predecessors, (39), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2021-11-07 07:47:16,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:16,371 INFO L225 Difference]: With dead ends: 253 [2021-11-07 07:47:16,371 INFO L226 Difference]: Without dead ends: 252 [2021-11-07 07:47:16,372 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2120, Invalid=12160, Unknown=0, NotChecked=0, Total=14280 [2021-11-07 07:47:16,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-07 07:47:16,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2021-11-07 07:47:16,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 209 states have internal predecessors, (210), 41 states have call successors, (41), 41 states have call predecessors, (41), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:16,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2021-11-07 07:47:16,384 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 237 [2021-11-07 07:47:16,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:16,385 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2021-11-07 07:47:16,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 79 states have (on average 2.5063291139240507) internal successors, (198), 42 states have internal predecessors, (198), 39 states have call successors, (39), 39 states have call predecessors, (39), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:16,385 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2021-11-07 07:47:16,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-07 07:47:16,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:16,387 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2021-11-07 07:47:16,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:16,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:16,602 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:47:16,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:16,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1502515929, now seen corresponding path program 19 times [2021-11-07 07:47:16,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:16,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207532759] [2021-11-07 07:47:16,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:16,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2261 backedges. 0 proven. 2261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:18,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:18,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207532759] [2021-11-07 07:47:18,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207532759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:18,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827962691] [2021-11-07 07:47:18,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:47:18,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:18,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:18,787 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:18,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 07:47:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:20,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-07 07:47:20,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2261 backedges. 0 proven. 2261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:21,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827962691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:21,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:21,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2021-11-07 07:47:21,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295954423] [2021-11-07 07:47:21,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-07 07:47:21,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:21,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-07 07:47:21,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=5883, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 07:47:21,170 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand has 83 states, 81 states have (on average 2.506172839506173) internal successors, (203), 43 states have internal predecessors, (203), 40 states have call successors, (40), 40 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:23,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:23,166 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2021-11-07 07:47:23,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-07 07:47:23,166 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 81 states have (on average 2.506172839506173) internal successors, (203), 43 states have internal predecessors, (203), 40 states have call successors, (40), 40 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-07 07:47:23,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:23,168 INFO L225 Difference]: With dead ends: 259 [2021-11-07 07:47:23,168 INFO L226 Difference]: Without dead ends: 258 [2021-11-07 07:47:23,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2946 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2223, Invalid=12783, Unknown=0, NotChecked=0, Total=15006 [2021-11-07 07:47:23,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-07 07:47:23,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2021-11-07 07:47:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 213 states have (on average 1.0093896713615023) internal successors, (215), 214 states have internal predecessors, (215), 42 states have call successors, (42), 42 states have call predecessors, (42), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2021-11-07 07:47:23,194 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 243 [2021-11-07 07:47:23,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:23,194 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2021-11-07 07:47:23,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 81 states have (on average 2.506172839506173) internal successors, (203), 43 states have internal predecessors, (203), 40 states have call successors, (40), 40 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:23,195 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2021-11-07 07:47:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-07 07:47:23,197 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:23,197 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1] [2021-11-07 07:47:23,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:23,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:23,414 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:47:23,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:23,414 INFO L85 PathProgramCache]: Analyzing trace with hash -225715127, now seen corresponding path program 20 times [2021-11-07 07:47:23,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:23,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758910350] [2021-11-07 07:47:23,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:23,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:25,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:25,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758910350] [2021-11-07 07:47:25,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758910350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:25,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619128850] [2021-11-07 07:47:25,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:47:25,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:25,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:25,561 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:25,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 07:47:27,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:47:27,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:27,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-07 07:47:27,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:28,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619128850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:28,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:28,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2021-11-07 07:47:28,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478825560] [2021-11-07 07:47:28,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-07 07:47:28,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:28,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-07 07:47:28,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=967, Invalid=6173, Unknown=0, NotChecked=0, Total=7140 [2021-11-07 07:47:28,107 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand has 85 states, 83 states have (on average 2.5060240963855422) internal successors, (208), 44 states have internal predecessors, (208), 41 states have call successors, (41), 41 states have call predecessors, (41), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:29,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:29,820 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2021-11-07 07:47:29,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-07 07:47:29,820 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 83 states have (on average 2.5060240963855422) internal successors, (208), 44 states have internal predecessors, (208), 41 states have call successors, (41), 41 states have call predecessors, (41), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2021-11-07 07:47:29,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:29,822 INFO L225 Difference]: With dead ends: 265 [2021-11-07 07:47:29,823 INFO L226 Difference]: Without dead ends: 264 [2021-11-07 07:47:29,824 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3101 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2331, Invalid=13419, Unknown=0, NotChecked=0, Total=15750 [2021-11-07 07:47:29,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-07 07:47:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2021-11-07 07:47:29,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 218 states have (on average 1.0091743119266054) internal successors, (220), 219 states have internal predecessors, (220), 43 states have call successors, (43), 43 states have call predecessors, (43), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:29,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2021-11-07 07:47:29,848 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 249 [2021-11-07 07:47:29,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:29,848 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2021-11-07 07:47:29,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 83 states have (on average 2.5060240963855422) internal successors, (208), 44 states have internal predecessors, (208), 41 states have call successors, (41), 41 states have call predecessors, (41), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:29,849 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2021-11-07 07:47:29,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-07 07:47:29,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:29,851 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1] [2021-11-07 07:47:29,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:30,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:30,066 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:47:30,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:30,066 INFO L85 PathProgramCache]: Analyzing trace with hash 535535385, now seen corresponding path program 20 times [2021-11-07 07:47:30,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:30,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744407866] [2021-11-07 07:47:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:30,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:32,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:32,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744407866] [2021-11-07 07:47:32,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744407866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:32,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940102614] [2021-11-07 07:47:32,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:47:32,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:32,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:32,456 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:32,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 07:47:34,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:47:34,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:34,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-07 07:47:34,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:35,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940102614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:35,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:35,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2021-11-07 07:47:35,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848241103] [2021-11-07 07:47:35,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-07 07:47:35,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:35,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-07 07:47:35,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=6471, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 07:47:35,308 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand has 87 states, 85 states have (on average 2.5058823529411764) internal successors, (213), 45 states have internal predecessors, (213), 42 states have call successors, (42), 42 states have call predecessors, (42), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:37,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:37,132 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2021-11-07 07:47:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-07 07:47:37,133 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 85 states have (on average 2.5058823529411764) internal successors, (213), 45 states have internal predecessors, (213), 42 states have call successors, (42), 42 states have call predecessors, (42), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2021-11-07 07:47:37,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:37,135 INFO L225 Difference]: With dead ends: 271 [2021-11-07 07:47:37,135 INFO L226 Difference]: Without dead ends: 270 [2021-11-07 07:47:37,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3261 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2439, Invalid=14073, Unknown=0, NotChecked=0, Total=16512 [2021-11-07 07:47:37,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-07 07:47:37,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2021-11-07 07:47:37,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 223 states have (on average 1.0089686098654709) internal successors, (225), 224 states have internal predecessors, (225), 44 states have call successors, (44), 44 states have call predecessors, (44), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:37,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2021-11-07 07:47:37,161 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 255 [2021-11-07 07:47:37,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:37,161 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2021-11-07 07:47:37,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 85 states have (on average 2.5058823529411764) internal successors, (213), 45 states have internal predecessors, (213), 42 states have call successors, (42), 42 states have call predecessors, (42), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:37,162 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2021-11-07 07:47:37,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-07 07:47:37,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:37,164 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1] [2021-11-07 07:47:37,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:37,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-07 07:47:37,378 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:47:37,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:37,378 INFO L85 PathProgramCache]: Analyzing trace with hash -75411269, now seen corresponding path program 21 times [2021-11-07 07:47:37,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:37,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025570557] [2021-11-07 07:47:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:37,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:39,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:39,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025570557] [2021-11-07 07:47:39,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025570557] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:39,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462817674] [2021-11-07 07:47:39,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:47:39,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:39,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:39,702 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:39,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 07:47:41,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-07 07:47:41,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:41,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-07 07:47:41,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:42,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462817674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:42,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:42,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2021-11-07 07:47:42,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981862708] [2021-11-07 07:47:42,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-07 07:47:42,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:42,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-07 07:47:42,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=6775, Unknown=0, NotChecked=0, Total=7832 [2021-11-07 07:47:42,657 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand has 89 states, 87 states have (on average 2.5057471264367814) internal successors, (218), 46 states have internal predecessors, (218), 43 states have call successors, (43), 43 states have call predecessors, (43), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:44,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:44,723 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2021-11-07 07:47:44,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-07 07:47:44,724 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 87 states have (on average 2.5057471264367814) internal successors, (218), 46 states have internal predecessors, (218), 43 states have call successors, (43), 43 states have call predecessors, (43), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 261 [2021-11-07 07:47:44,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:44,725 INFO L225 Difference]: With dead ends: 277 [2021-11-07 07:47:44,726 INFO L226 Difference]: Without dead ends: 276 [2021-11-07 07:47:44,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3424 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2552, Invalid=14740, Unknown=0, NotChecked=0, Total=17292 [2021-11-07 07:47:44,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-07 07:47:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2021-11-07 07:47:44,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 228 states have (on average 1.0087719298245614) internal successors, (230), 229 states have internal predecessors, (230), 45 states have call successors, (45), 45 states have call predecessors, (45), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:44,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2021-11-07 07:47:44,757 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 261 [2021-11-07 07:47:44,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:44,757 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2021-11-07 07:47:44,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 87 states have (on average 2.5057471264367814) internal successors, (218), 46 states have internal predecessors, (218), 43 states have call successors, (43), 43 states have call predecessors, (43), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:44,758 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2021-11-07 07:47:44,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-07 07:47:44,761 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:44,761 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1] [2021-11-07 07:47:44,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:44,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-07 07:47:44,974 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:47:44,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:44,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1098877429, now seen corresponding path program 21 times [2021-11-07 07:47:44,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:44,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171628082] [2021-11-07 07:47:44,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:44,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2751 backedges. 0 proven. 2751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:47,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:47,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171628082] [2021-11-07 07:47:47,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171628082] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:47,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032315095] [2021-11-07 07:47:47,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:47:47,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:47,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:47,656 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:47,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-07 07:47:49,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-07 07:47:49,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:49,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-07 07:47:49,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2751 backedges. 0 proven. 2751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:50,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032315095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:50,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:50,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2021-11-07 07:47:50,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743193192] [2021-11-07 07:47:50,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-07 07:47:50,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:50,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-07 07:47:50,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1103, Invalid=7087, Unknown=0, NotChecked=0, Total=8190 [2021-11-07 07:47:50,631 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand has 91 states, 89 states have (on average 2.50561797752809) internal successors, (223), 47 states have internal predecessors, (223), 44 states have call successors, (44), 44 states have call predecessors, (44), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:52,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:52,646 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2021-11-07 07:47:52,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-07 07:47:52,647 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 89 states have (on average 2.50561797752809) internal successors, (223), 47 states have internal predecessors, (223), 44 states have call successors, (44), 44 states have call predecessors, (44), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2021-11-07 07:47:52,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:52,649 INFO L225 Difference]: With dead ends: 283 [2021-11-07 07:47:52,649 INFO L226 Difference]: Without dead ends: 282 [2021-11-07 07:47:52,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3592 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2665, Invalid=15425, Unknown=0, NotChecked=0, Total=18090 [2021-11-07 07:47:52,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-07 07:47:52,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2021-11-07 07:47:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 233 states have (on average 1.0085836909871244) internal successors, (235), 234 states have internal predecessors, (235), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:52,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2021-11-07 07:47:52,677 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 267 [2021-11-07 07:47:52,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:52,678 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2021-11-07 07:47:52,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 89 states have (on average 2.50561797752809) internal successors, (223), 47 states have internal predecessors, (223), 44 states have call successors, (44), 44 states have call predecessors, (44), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:52,678 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2021-11-07 07:47:52,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-07 07:47:52,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:52,681 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1] [2021-11-07 07:47:52,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:52,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:52,906 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:47:52,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:52,906 INFO L85 PathProgramCache]: Analyzing trace with hash -767448531, now seen corresponding path program 22 times [2021-11-07 07:47:52,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:52,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815735172] [2021-11-07 07:47:52,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:52,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:55,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:55,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815735172] [2021-11-07 07:47:55,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815735172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:55,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111215529] [2021-11-07 07:47:55,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:47:55,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:55,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:55,577 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:55,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 07:47:57,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:47:57,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:47:57,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-07 07:47:57,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:47:58,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111215529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:58,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:58,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2021-11-07 07:47:58,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724691339] [2021-11-07 07:47:58,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-07 07:47:58,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:58,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-07 07:47:58,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1151, Invalid=7405, Unknown=0, NotChecked=0, Total=8556 [2021-11-07 07:47:58,504 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand has 93 states, 91 states have (on average 2.5054945054945055) internal successors, (228), 48 states have internal predecessors, (228), 45 states have call successors, (45), 45 states have call predecessors, (45), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:00,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:00,330 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2021-11-07 07:48:00,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-07 07:48:00,330 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 91 states have (on average 2.5054945054945055) internal successors, (228), 48 states have internal predecessors, (228), 45 states have call successors, (45), 45 states have call predecessors, (45), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2021-11-07 07:48:00,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:00,331 INFO L225 Difference]: With dead ends: 289 [2021-11-07 07:48:00,331 INFO L226 Difference]: Without dead ends: 288 [2021-11-07 07:48:00,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3763 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2783, Invalid=16123, Unknown=0, NotChecked=0, Total=18906 [2021-11-07 07:48:00,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-07 07:48:00,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2021-11-07 07:48:00,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 238 states have (on average 1.0084033613445378) internal successors, (240), 239 states have internal predecessors, (240), 47 states have call successors, (47), 47 states have call predecessors, (47), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:00,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2021-11-07 07:48:00,355 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 273 [2021-11-07 07:48:00,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:00,355 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2021-11-07 07:48:00,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 91 states have (on average 2.5054945054945055) internal successors, (228), 48 states have internal predecessors, (228), 45 states have call successors, (45), 45 states have call predecessors, (45), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:00,356 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2021-11-07 07:48:00,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-07 07:48:00,358 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:00,358 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2021-11-07 07:48:00,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:00,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:00,566 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:48:00,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:00,566 INFO L85 PathProgramCache]: Analyzing trace with hash 509637117, now seen corresponding path program 22 times [2021-11-07 07:48:00,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:00,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620480474] [2021-11-07 07:48:00,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:00,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 0 proven. 3014 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:03,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:03,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620480474] [2021-11-07 07:48:03,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620480474] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:03,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976885074] [2021-11-07 07:48:03,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:48:03,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:03,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:03,022 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:03,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 07:48:05,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:48:05,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:05,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-07 07:48:05,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 0 proven. 3014 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:06,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976885074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:06,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:06,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2021-11-07 07:48:06,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216959273] [2021-11-07 07:48:06,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-07 07:48:06,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:06,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-07 07:48:06,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=7731, Unknown=0, NotChecked=0, Total=8930 [2021-11-07 07:48:06,085 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand has 95 states, 93 states have (on average 2.5053763440860215) internal successors, (233), 49 states have internal predecessors, (233), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:08,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:08,048 INFO L93 Difference]: Finished difference Result 295 states and 295 transitions. [2021-11-07 07:48:08,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-07 07:48:08,048 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 93 states have (on average 2.5053763440860215) internal successors, (233), 49 states have internal predecessors, (233), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 279 [2021-11-07 07:48:08,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:08,050 INFO L225 Difference]: With dead ends: 295 [2021-11-07 07:48:08,050 INFO L226 Difference]: Without dead ends: 294 [2021-11-07 07:48:08,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3939 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2901, Invalid=16839, Unknown=0, NotChecked=0, Total=19740 [2021-11-07 07:48:08,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-07 07:48:08,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2021-11-07 07:48:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 243 states have (on average 1.008230452674897) internal successors, (245), 244 states have internal predecessors, (245), 48 states have call successors, (48), 48 states have call predecessors, (48), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:08,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2021-11-07 07:48:08,071 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 279 [2021-11-07 07:48:08,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:08,071 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2021-11-07 07:48:08,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 93 states have (on average 2.5053763440860215) internal successors, (233), 49 states have internal predecessors, (233), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:08,072 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2021-11-07 07:48:08,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-07 07:48:08,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:08,074 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1] [2021-11-07 07:48:08,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:08,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-07 07:48:08,302 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:48:08,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:08,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1285384351, now seen corresponding path program 23 times [2021-11-07 07:48:08,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:08,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529671272] [2021-11-07 07:48:08,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:08,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:10,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:10,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529671272] [2021-11-07 07:48:10,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529671272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:10,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855898121] [2021-11-07 07:48:10,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:48:10,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:10,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:10,863 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:10,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-07 07:48:13,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-07 07:48:13,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:13,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-07 07:48:13,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:13,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855898121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:13,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:13,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2021-11-07 07:48:13,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462140211] [2021-11-07 07:48:13,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-07 07:48:13,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:13,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-07 07:48:13,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1249, Invalid=8063, Unknown=0, NotChecked=0, Total=9312 [2021-11-07 07:48:13,996 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand has 97 states, 95 states have (on average 2.5052631578947366) internal successors, (238), 50 states have internal predecessors, (238), 47 states have call successors, (47), 47 states have call predecessors, (47), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:16,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:16,115 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2021-11-07 07:48:16,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-07 07:48:16,115 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 95 states have (on average 2.5052631578947366) internal successors, (238), 50 states have internal predecessors, (238), 47 states have call successors, (47), 47 states have call predecessors, (47), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 285 [2021-11-07 07:48:16,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:16,116 INFO L225 Difference]: With dead ends: 301 [2021-11-07 07:48:16,117 INFO L226 Difference]: Without dead ends: 300 [2021-11-07 07:48:16,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4118 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3024, Invalid=17568, Unknown=0, NotChecked=0, Total=20592 [2021-11-07 07:48:16,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-07 07:48:16,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2021-11-07 07:48:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 248 states have (on average 1.0080645161290323) internal successors, (250), 249 states have internal predecessors, (250), 49 states have call successors, (49), 49 states have call predecessors, (49), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:16,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2021-11-07 07:48:16,142 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 285 [2021-11-07 07:48:16,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:16,143 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2021-11-07 07:48:16,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 95 states have (on average 2.5052631578947366) internal successors, (238), 50 states have internal predecessors, (238), 47 states have call successors, (47), 47 states have call predecessors, (47), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:16,143 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2021-11-07 07:48:16,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-11-07 07:48:16,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:16,145 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1] [2021-11-07 07:48:16,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-07 07:48:16,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-07 07:48:16,362 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:48:16,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:16,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1761864977, now seen corresponding path program 23 times [2021-11-07 07:48:16,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:16,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145273352] [2021-11-07 07:48:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:16,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3289 backedges. 0 proven. 3289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:18,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:18,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145273352] [2021-11-07 07:48:18,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145273352] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:18,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441938324] [2021-11-07 07:48:18,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:48:18,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:18,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:18,890 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:18,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 07:48:21,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-07 07:48:21,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:21,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-07 07:48:21,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3289 backedges. 0 proven. 3289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:22,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441938324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:22,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:22,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2021-11-07 07:48:22,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001932224] [2021-11-07 07:48:22,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-07 07:48:22,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:22,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-07 07:48:22,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=8403, Unknown=0, NotChecked=0, Total=9702 [2021-11-07 07:48:22,063 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand has 99 states, 97 states have (on average 2.5051546391752577) internal successors, (243), 51 states have internal predecessors, (243), 48 states have call successors, (48), 48 states have call predecessors, (48), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:24,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:24,248 INFO L93 Difference]: Finished difference Result 307 states and 307 transitions. [2021-11-07 07:48:24,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-07 07:48:24,249 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 97 states have (on average 2.5051546391752577) internal successors, (243), 51 states have internal predecessors, (243), 48 states have call successors, (48), 48 states have call predecessors, (48), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 291 [2021-11-07 07:48:24,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:24,250 INFO L225 Difference]: With dead ends: 307 [2021-11-07 07:48:24,250 INFO L226 Difference]: Without dead ends: 306 [2021-11-07 07:48:24,252 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4302 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3147, Invalid=18315, Unknown=0, NotChecked=0, Total=21462 [2021-11-07 07:48:24,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-07 07:48:24,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2021-11-07 07:48:24,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 253 states have (on average 1.007905138339921) internal successors, (255), 254 states have internal predecessors, (255), 50 states have call successors, (50), 50 states have call predecessors, (50), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:24,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 305 transitions. [2021-11-07 07:48:24,280 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 305 transitions. Word has length 291 [2021-11-07 07:48:24,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:24,281 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 305 transitions. [2021-11-07 07:48:24,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 97 states have (on average 2.5051546391752577) internal successors, (243), 51 states have internal predecessors, (243), 48 states have call successors, (48), 48 states have call predecessors, (48), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:24,281 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 305 transitions. [2021-11-07 07:48:24,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-11-07 07:48:24,284 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:24,285 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1] [2021-11-07 07:48:24,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:24,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-07 07:48:24,497 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:48:24,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:24,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1952117743, now seen corresponding path program 24 times [2021-11-07 07:48:24,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:24,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381069333] [2021-11-07 07:48:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:24,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:27,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:27,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381069333] [2021-11-07 07:48:27,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381069333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:27,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281299160] [2021-11-07 07:48:27,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:48:27,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:27,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:27,288 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:27,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-07 07:48:29,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-07 07:48:29,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:29,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-07 07:48:29,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:30,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281299160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:30,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:30,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2021-11-07 07:48:30,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365602255] [2021-11-07 07:48:30,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-07 07:48:30,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:30,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-07 07:48:30,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1351, Invalid=8749, Unknown=0, NotChecked=0, Total=10100 [2021-11-07 07:48:30,559 INFO L87 Difference]: Start difference. First operand 305 states and 305 transitions. Second operand has 101 states, 99 states have (on average 2.505050505050505) internal successors, (248), 52 states have internal predecessors, (248), 49 states have call successors, (49), 49 states have call predecessors, (49), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:32,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:32,742 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2021-11-07 07:48:32,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-07 07:48:32,742 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 99 states have (on average 2.505050505050505) internal successors, (248), 52 states have internal predecessors, (248), 49 states have call successors, (49), 49 states have call predecessors, (49), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 297 [2021-11-07 07:48:32,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:32,744 INFO L225 Difference]: With dead ends: 313 [2021-11-07 07:48:32,744 INFO L226 Difference]: Without dead ends: 312 [2021-11-07 07:48:32,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4489 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3275, Invalid=19075, Unknown=0, NotChecked=0, Total=22350 [2021-11-07 07:48:32,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-07 07:48:32,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 311. [2021-11-07 07:48:32,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 258 states have (on average 1.0077519379844961) internal successors, (260), 259 states have internal predecessors, (260), 51 states have call successors, (51), 51 states have call predecessors, (51), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2021-11-07 07:48:32,768 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 297 [2021-11-07 07:48:32,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:32,768 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2021-11-07 07:48:32,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 99 states have (on average 2.505050505050505) internal successors, (248), 52 states have internal predecessors, (248), 49 states have call successors, (49), 49 states have call predecessors, (49), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:32,768 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2021-11-07 07:48:32,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-11-07 07:48:32,771 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:32,771 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1] [2021-11-07 07:48:32,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-07 07:48:32,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:32,982 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:48:32,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:32,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1526978785, now seen corresponding path program 24 times [2021-11-07 07:48:32,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:32,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425134376] [2021-11-07 07:48:32,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:32,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3576 backedges. 0 proven. 3576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:35,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:35,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425134376] [2021-11-07 07:48:35,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425134376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:35,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890486906] [2021-11-07 07:48:35,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:48:35,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:35,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:35,889 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:35,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-07 07:48:38,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-07 07:48:38,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:38,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-07 07:48:38,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3576 backedges. 0 proven. 3576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:39,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890486906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:39,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:39,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2021-11-07 07:48:39,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090380928] [2021-11-07 07:48:39,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-07 07:48:39,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:39,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-07 07:48:39,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=9103, Unknown=0, NotChecked=0, Total=10506 [2021-11-07 07:48:39,407 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand has 103 states, 101 states have (on average 2.504950495049505) internal successors, (253), 53 states have internal predecessors, (253), 50 states have call successors, (50), 50 states have call predecessors, (50), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:41,673 INFO L93 Difference]: Finished difference Result 319 states and 319 transitions. [2021-11-07 07:48:41,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-07 07:48:41,674 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 101 states have (on average 2.504950495049505) internal successors, (253), 53 states have internal predecessors, (253), 50 states have call successors, (50), 50 states have call predecessors, (50), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 303 [2021-11-07 07:48:41,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:41,675 INFO L225 Difference]: With dead ends: 319 [2021-11-07 07:48:41,675 INFO L226 Difference]: Without dead ends: 318 [2021-11-07 07:48:41,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4681 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3403, Invalid=19853, Unknown=0, NotChecked=0, Total=23256 [2021-11-07 07:48:41,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-07 07:48:41,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 317. [2021-11-07 07:48:41,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 263 states have (on average 1.0076045627376427) internal successors, (265), 264 states have internal predecessors, (265), 52 states have call successors, (52), 52 states have call predecessors, (52), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2021-11-07 07:48:41,715 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 303 [2021-11-07 07:48:41,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:41,716 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2021-11-07 07:48:41,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 101 states have (on average 2.504950495049505) internal successors, (253), 53 states have internal predecessors, (253), 50 states have call successors, (50), 50 states have call predecessors, (50), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,716 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2021-11-07 07:48:41,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-11-07 07:48:41,718 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:41,719 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1] [2021-11-07 07:48:41,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-11-07 07:48:41,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-07 07:48:41,926 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:48:41,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:41,926 INFO L85 PathProgramCache]: Analyzing trace with hash 464065667, now seen corresponding path program 25 times [2021-11-07 07:48:41,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:41,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979608052] [2021-11-07 07:48:41,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:41,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:44,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:44,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979608052] [2021-11-07 07:48:44,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979608052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:44,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065195153] [2021-11-07 07:48:44,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:48:44,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:44,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:44,908 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:44,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-07 07:48:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:47,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-07 07:48:47,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:48,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065195153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:48,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:48,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2021-11-07 07:48:48,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294772085] [2021-11-07 07:48:48,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-07 07:48:48,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:48,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-07 07:48:48,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1457, Invalid=9463, Unknown=0, NotChecked=0, Total=10920 [2021-11-07 07:48:48,346 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand has 105 states, 103 states have (on average 2.504854368932039) internal successors, (258), 54 states have internal predecessors, (258), 51 states have call successors, (51), 51 states have call predecessors, (51), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:50,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:50,636 INFO L93 Difference]: Finished difference Result 325 states and 325 transitions. [2021-11-07 07:48:50,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-11-07 07:48:50,636 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 103 states have (on average 2.504854368932039) internal successors, (258), 54 states have internal predecessors, (258), 51 states have call successors, (51), 51 states have call predecessors, (51), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 309 [2021-11-07 07:48:50,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:50,638 INFO L225 Difference]: With dead ends: 325 [2021-11-07 07:48:50,638 INFO L226 Difference]: Without dead ends: 324 [2021-11-07 07:48:50,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4876 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3536, Invalid=20644, Unknown=0, NotChecked=0, Total=24180 [2021-11-07 07:48:50,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-07 07:48:50,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2021-11-07 07:48:50,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 268 states have (on average 1.007462686567164) internal successors, (270), 269 states have internal predecessors, (270), 53 states have call successors, (53), 53 states have call predecessors, (53), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:50,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2021-11-07 07:48:50,665 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 309 [2021-11-07 07:48:50,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:50,665 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2021-11-07 07:48:50,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 103 states have (on average 2.504854368932039) internal successors, (258), 54 states have internal predecessors, (258), 51 states have call successors, (51), 51 states have call predecessors, (51), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:50,665 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2021-11-07 07:48:50,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-11-07 07:48:50,668 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:50,668 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1] [2021-11-07 07:48:50,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:50,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:50,894 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:48:50,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:50,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1737997357, now seen corresponding path program 25 times [2021-11-07 07:48:50,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:50,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48387358] [2021-11-07 07:48:50,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:50,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3875 backedges. 0 proven. 3875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:53,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:53,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48387358] [2021-11-07 07:48:53,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48387358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:53,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40378528] [2021-11-07 07:48:53,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:48:53,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:53,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:53,952 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:53,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-07 07:48:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:56,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-07 07:48:56,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3875 backedges. 0 proven. 3875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:57,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40378528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:57,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:57,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2021-11-07 07:48:57,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585654143] [2021-11-07 07:48:57,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-07 07:48:57,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:57,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-07 07:48:57,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1511, Invalid=9831, Unknown=0, NotChecked=0, Total=11342 [2021-11-07 07:48:57,683 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand has 107 states, 105 states have (on average 2.5047619047619047) internal successors, (263), 55 states have internal predecessors, (263), 52 states have call successors, (52), 52 states have call predecessors, (52), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:00,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:00,231 INFO L93 Difference]: Finished difference Result 331 states and 331 transitions. [2021-11-07 07:49:00,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-07 07:49:00,232 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 105 states have (on average 2.5047619047619047) internal successors, (263), 55 states have internal predecessors, (263), 52 states have call successors, (52), 52 states have call predecessors, (52), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 315 [2021-11-07 07:49:00,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:00,233 INFO L225 Difference]: With dead ends: 331 [2021-11-07 07:49:00,234 INFO L226 Difference]: Without dead ends: 330 [2021-11-07 07:49:00,235 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5076 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3669, Invalid=21453, Unknown=0, NotChecked=0, Total=25122 [2021-11-07 07:49:00,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-07 07:49:00,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 329. [2021-11-07 07:49:00,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 273 states have (on average 1.0073260073260073) internal successors, (275), 274 states have internal predecessors, (275), 54 states have call successors, (54), 54 states have call predecessors, (54), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:00,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 329 transitions. [2021-11-07 07:49:00,253 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 329 transitions. Word has length 315 [2021-11-07 07:49:00,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:00,253 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 329 transitions. [2021-11-07 07:49:00,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 105 states have (on average 2.5047619047619047) internal successors, (263), 55 states have internal predecessors, (263), 52 states have call successors, (52), 52 states have call predecessors, (52), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:00,253 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 329 transitions. [2021-11-07 07:49:00,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-07 07:49:00,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:00,256 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1] [2021-11-07 07:49:00,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-07 07:49:00,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-07 07:49:00,482 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:49:00,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:00,482 INFO L85 PathProgramCache]: Analyzing trace with hash 339345909, now seen corresponding path program 26 times [2021-11-07 07:49:00,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:00,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579287080] [2021-11-07 07:49:00,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:00,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:03,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:03,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579287080] [2021-11-07 07:49:03,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579287080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:03,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578088805] [2021-11-07 07:49:03,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:49:03,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:03,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:03,645 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:03,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-07 07:49:06,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:49:06,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:06,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-07 07:49:06,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:07,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578088805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:07,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:07,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2021-11-07 07:49:07,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046678166] [2021-11-07 07:49:07,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-11-07 07:49:07,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:07,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-11-07 07:49:07,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1567, Invalid=10205, Unknown=0, NotChecked=0, Total=11772 [2021-11-07 07:49:07,466 INFO L87 Difference]: Start difference. First operand 329 states and 329 transitions. Second operand has 109 states, 107 states have (on average 2.5046728971962615) internal successors, (268), 56 states have internal predecessors, (268), 53 states have call successors, (53), 53 states have call predecessors, (53), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:09,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:09,995 INFO L93 Difference]: Finished difference Result 337 states and 337 transitions. [2021-11-07 07:49:09,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-07 07:49:09,996 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 107 states have (on average 2.5046728971962615) internal successors, (268), 56 states have internal predecessors, (268), 53 states have call successors, (53), 53 states have call predecessors, (53), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2021-11-07 07:49:09,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:09,998 INFO L225 Difference]: With dead ends: 337 [2021-11-07 07:49:09,998 INFO L226 Difference]: Without dead ends: 336 [2021-11-07 07:49:10,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5279 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3807, Invalid=22275, Unknown=0, NotChecked=0, Total=26082 [2021-11-07 07:49:10,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-07 07:49:10,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 335. [2021-11-07 07:49:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 278 states have (on average 1.0071942446043165) internal successors, (280), 279 states have internal predecessors, (280), 55 states have call successors, (55), 55 states have call predecessors, (55), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:10,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 335 transitions. [2021-11-07 07:49:10,030 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 335 transitions. Word has length 321 [2021-11-07 07:49:10,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:10,031 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 335 transitions. [2021-11-07 07:49:10,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 107 states have (on average 2.5046728971962615) internal successors, (268), 56 states have internal predecessors, (268), 53 states have call successors, (53), 53 states have call predecessors, (53), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:10,032 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 335 transitions. [2021-11-07 07:49:10,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-11-07 07:49:10,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:10,035 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1] [2021-11-07 07:49:10,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:10,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:10,261 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:49:10,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:10,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1738943547, now seen corresponding path program 26 times [2021-11-07 07:49:10,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:10,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807232507] [2021-11-07 07:49:10,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:10,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:13,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:13,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807232507] [2021-11-07 07:49:13,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807232507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:13,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184938506] [2021-11-07 07:49:13,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:49:13,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:13,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:13,823 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:13,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-07 07:49:16,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:49:16,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:16,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 110 conjunts are in the unsatisfiable core [2021-11-07 07:49:16,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:17,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184938506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:17,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:17,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2021-11-07 07:49:17,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927438384] [2021-11-07 07:49:17,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-11-07 07:49:17,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:17,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-11-07 07:49:17,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=10587, Unknown=0, NotChecked=0, Total=12210 [2021-11-07 07:49:17,798 INFO L87 Difference]: Start difference. First operand 335 states and 335 transitions. Second operand has 111 states, 109 states have (on average 2.5045871559633026) internal successors, (273), 57 states have internal predecessors, (273), 54 states have call successors, (54), 54 states have call predecessors, (54), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:20,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:20,460 INFO L93 Difference]: Finished difference Result 343 states and 343 transitions. [2021-11-07 07:49:20,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-07 07:49:20,461 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 109 states have (on average 2.5045871559633026) internal successors, (273), 57 states have internal predecessors, (273), 54 states have call successors, (54), 54 states have call predecessors, (54), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-11-07 07:49:20,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:20,462 INFO L225 Difference]: With dead ends: 343 [2021-11-07 07:49:20,462 INFO L226 Difference]: Without dead ends: 342 [2021-11-07 07:49:20,464 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5487 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3945, Invalid=23115, Unknown=0, NotChecked=0, Total=27060 [2021-11-07 07:49:20,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-11-07 07:49:20,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 341. [2021-11-07 07:49:20,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 283 states have (on average 1.0070671378091873) internal successors, (285), 284 states have internal predecessors, (285), 56 states have call successors, (56), 56 states have call predecessors, (56), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:20,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 341 transitions. [2021-11-07 07:49:20,483 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 341 transitions. Word has length 327 [2021-11-07 07:49:20,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:20,483 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 341 transitions. [2021-11-07 07:49:20,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 109 states have (on average 2.5045871559633026) internal successors, (273), 57 states have internal predecessors, (273), 54 states have call successors, (54), 54 states have call predecessors, (54), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:20,483 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 341 transitions. [2021-11-07 07:49:20,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-11-07 07:49:20,485 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:20,485 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1] [2021-11-07 07:49:20,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-07 07:49:20,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:20,694 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:49:20,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:20,694 INFO L85 PathProgramCache]: Analyzing trace with hash 942167143, now seen corresponding path program 27 times [2021-11-07 07:49:20,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:20,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316142223] [2021-11-07 07:49:20,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:20,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:24,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:24,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316142223] [2021-11-07 07:49:24,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316142223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:24,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803845550] [2021-11-07 07:49:24,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:49:24,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:24,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:24,042 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:24,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-07 07:49:27,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-11-07 07:49:27,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:27,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-07 07:49:27,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:28,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803845550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:28,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:28,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2021-11-07 07:49:28,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096396015] [2021-11-07 07:49:28,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-11-07 07:49:28,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:28,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-11-07 07:49:28,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1681, Invalid=10975, Unknown=0, NotChecked=0, Total=12656 [2021-11-07 07:49:28,207 INFO L87 Difference]: Start difference. First operand 341 states and 341 transitions. Second operand has 113 states, 111 states have (on average 2.5045045045045047) internal successors, (278), 58 states have internal predecessors, (278), 55 states have call successors, (55), 55 states have call predecessors, (55), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:31,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:31,139 INFO L93 Difference]: Finished difference Result 349 states and 349 transitions. [2021-11-07 07:49:31,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-11-07 07:49:31,140 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 111 states have (on average 2.5045045045045047) internal successors, (278), 58 states have internal predecessors, (278), 55 states have call successors, (55), 55 states have call predecessors, (55), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 333 [2021-11-07 07:49:31,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:31,142 INFO L225 Difference]: With dead ends: 349 [2021-11-07 07:49:31,142 INFO L226 Difference]: Without dead ends: 348 [2021-11-07 07:49:31,144 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5698 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4088, Invalid=23968, Unknown=0, NotChecked=0, Total=28056 [2021-11-07 07:49:31,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-07 07:49:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 347. [2021-11-07 07:49:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 288 states have (on average 1.0069444444444444) internal successors, (290), 289 states have internal predecessors, (290), 57 states have call successors, (57), 57 states have call predecessors, (57), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 347 transitions. [2021-11-07 07:49:31,190 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 347 transitions. Word has length 333 [2021-11-07 07:49:31,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:31,190 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 347 transitions. [2021-11-07 07:49:31,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 111 states have (on average 2.5045045045045047) internal successors, (278), 58 states have internal predecessors, (278), 55 states have call successors, (55), 55 states have call predecessors, (55), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:31,190 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 347 transitions. [2021-11-07 07:49:31,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-11-07 07:49:31,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:31,193 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1] [2021-11-07 07:49:31,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:31,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-07 07:49:31,418 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:49:31,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:31,418 INFO L85 PathProgramCache]: Analyzing trace with hash -548861769, now seen corresponding path program 27 times [2021-11-07 07:49:31,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:31,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200644248] [2021-11-07 07:49:31,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:31,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4509 backedges. 0 proven. 4509 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:34,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:34,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200644248] [2021-11-07 07:49:34,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200644248] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:34,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960812453] [2021-11-07 07:49:34,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:49:34,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:34,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:34,780 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:34,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-07 07:49:38,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-11-07 07:49:38,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:38,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-07 07:49:38,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4509 backedges. 0 proven. 4509 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:39,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960812453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:39,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:39,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2021-11-07 07:49:39,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145053567] [2021-11-07 07:49:39,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-11-07 07:49:39,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:39,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-11-07 07:49:39,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1739, Invalid=11371, Unknown=0, NotChecked=0, Total=13110 [2021-11-07 07:49:39,043 INFO L87 Difference]: Start difference. First operand 347 states and 347 transitions. Second operand has 115 states, 113 states have (on average 2.504424778761062) internal successors, (283), 59 states have internal predecessors, (283), 56 states have call successors, (56), 56 states have call predecessors, (56), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:41,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:41,916 INFO L93 Difference]: Finished difference Result 355 states and 355 transitions. [2021-11-07 07:49:41,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-11-07 07:49:41,916 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 113 states have (on average 2.504424778761062) internal successors, (283), 59 states have internal predecessors, (283), 56 states have call successors, (56), 56 states have call predecessors, (56), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2021-11-07 07:49:41,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:41,918 INFO L225 Difference]: With dead ends: 355 [2021-11-07 07:49:41,918 INFO L226 Difference]: Without dead ends: 354 [2021-11-07 07:49:41,919 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5914 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4231, Invalid=24839, Unknown=0, NotChecked=0, Total=29070 [2021-11-07 07:49:41,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-11-07 07:49:41,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 353. [2021-11-07 07:49:41,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 293 states have (on average 1.006825938566553) internal successors, (295), 294 states have internal predecessors, (295), 58 states have call successors, (58), 58 states have call predecessors, (58), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:41,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 353 transitions. [2021-11-07 07:49:41,954 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 353 transitions. Word has length 339 [2021-11-07 07:49:41,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:41,954 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 353 transitions. [2021-11-07 07:49:41,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 113 states have (on average 2.504424778761062) internal successors, (283), 59 states have internal predecessors, (283), 56 states have call successors, (56), 56 states have call predecessors, (56), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 353 transitions. [2021-11-07 07:49:41,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-11-07 07:49:41,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:41,958 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1] [2021-11-07 07:49:41,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-11-07 07:49:42,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-07 07:49:42,162 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:49:42,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:42,162 INFO L85 PathProgramCache]: Analyzing trace with hash 361008089, now seen corresponding path program 28 times [2021-11-07 07:49:42,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:42,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22629734] [2021-11-07 07:49:42,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:42,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:45,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:45,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22629734] [2021-11-07 07:49:45,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22629734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:45,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89865924] [2021-11-07 07:49:45,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:49:45,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:45,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:45,876 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:45,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-07 07:49:49,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:49:49,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:49,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-07 07:49:49,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:50,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89865924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:50,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:50,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2021-11-07 07:49:50,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944455031] [2021-11-07 07:49:50,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2021-11-07 07:49:50,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:50,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-11-07 07:49:50,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1799, Invalid=11773, Unknown=0, NotChecked=0, Total=13572 [2021-11-07 07:49:50,411 INFO L87 Difference]: Start difference. First operand 353 states and 353 transitions. Second operand has 117 states, 115 states have (on average 2.5043478260869567) internal successors, (288), 60 states have internal predecessors, (288), 57 states have call successors, (57), 57 states have call predecessors, (57), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:53,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:53,462 INFO L93 Difference]: Finished difference Result 361 states and 361 transitions. [2021-11-07 07:49:53,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-11-07 07:49:53,465 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 115 states have (on average 2.5043478260869567) internal successors, (288), 60 states have internal predecessors, (288), 57 states have call successors, (57), 57 states have call predecessors, (57), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 345 [2021-11-07 07:49:53,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:53,468 INFO L225 Difference]: With dead ends: 361 [2021-11-07 07:49:53,468 INFO L226 Difference]: Without dead ends: 360 [2021-11-07 07:49:53,470 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6133 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=4379, Invalid=25723, Unknown=0, NotChecked=0, Total=30102 [2021-11-07 07:49:53,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-07 07:49:53,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 359. [2021-11-07 07:49:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 298 states have (on average 1.0067114093959733) internal successors, (300), 299 states have internal predecessors, (300), 59 states have call successors, (59), 59 states have call predecessors, (59), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 359 transitions. [2021-11-07 07:49:53,505 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 359 transitions. Word has length 345 [2021-11-07 07:49:53,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:53,505 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 359 transitions. [2021-11-07 07:49:53,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 115 states have (on average 2.5043478260869567) internal successors, (288), 60 states have internal predecessors, (288), 57 states have call successors, (57), 57 states have call predecessors, (57), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:53,506 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 359 transitions. [2021-11-07 07:49:53,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-11-07 07:49:53,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:53,508 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 28, 28, 1, 1, 1, 1, 1] [2021-11-07 07:49:53,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:53,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-07 07:49:53,734 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:49:53,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:53,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1290166953, now seen corresponding path program 28 times [2021-11-07 07:49:53,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:53,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610644907] [2021-11-07 07:49:53,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:53,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4844 backedges. 0 proven. 4844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:57,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:57,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610644907] [2021-11-07 07:49:57,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610644907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:57,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132375797] [2021-11-07 07:49:57,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:49:57,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:57,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:57,587 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:57,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-07 07:50:01,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:50:01,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:01,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 118 conjunts are in the unsatisfiable core [2021-11-07 07:50:01,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:02,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4844 backedges. 0 proven. 4844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:02,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132375797] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:02,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:02,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2021-11-07 07:50:02,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741745268] [2021-11-07 07:50:02,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-11-07 07:50:02,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:02,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-11-07 07:50:02,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1859, Invalid=12183, Unknown=0, NotChecked=0, Total=14042 [2021-11-07 07:50:02,088 INFO L87 Difference]: Start difference. First operand 359 states and 359 transitions. Second operand has 119 states, 117 states have (on average 2.5042735042735043) internal successors, (293), 61 states have internal predecessors, (293), 58 states have call successors, (58), 58 states have call predecessors, (58), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:05,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:05,008 INFO L93 Difference]: Finished difference Result 367 states and 367 transitions. [2021-11-07 07:50:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-11-07 07:50:05,009 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 117 states have (on average 2.5042735042735043) internal successors, (293), 61 states have internal predecessors, (293), 58 states have call successors, (58), 58 states have call predecessors, (58), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 351 [2021-11-07 07:50:05,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:05,010 INFO L225 Difference]: With dead ends: 367 [2021-11-07 07:50:05,011 INFO L226 Difference]: Without dead ends: 366 [2021-11-07 07:50:05,012 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6357 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4527, Invalid=26625, Unknown=0, NotChecked=0, Total=31152 [2021-11-07 07:50:05,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-07 07:50:05,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 365. [2021-11-07 07:50:05,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 303 states have (on average 1.0066006600660067) internal successors, (305), 304 states have internal predecessors, (305), 60 states have call successors, (60), 60 states have call predecessors, (60), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:05,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 365 transitions. [2021-11-07 07:50:05,043 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 365 transitions. Word has length 351 [2021-11-07 07:50:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:05,044 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 365 transitions. [2021-11-07 07:50:05,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 117 states have (on average 2.5042735042735043) internal successors, (293), 61 states have internal predecessors, (293), 58 states have call successors, (58), 58 states have call predecessors, (58), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:05,044 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 365 transitions. [2021-11-07 07:50:05,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2021-11-07 07:50:05,046 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:05,046 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1] [2021-11-07 07:50:05,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-11-07 07:50:05,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-07 07:50:05,247 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:50:05,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:05,247 INFO L85 PathProgramCache]: Analyzing trace with hash 631187531, now seen corresponding path program 29 times [2021-11-07 07:50:05,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:05,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200644536] [2021-11-07 07:50:05,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:05,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:09,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:09,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200644536] [2021-11-07 07:50:09,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200644536] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:09,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621857301] [2021-11-07 07:50:09,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:50:09,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:09,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:09,067 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:09,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-07 07:50:12,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-11-07 07:50:12,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:12,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-07 07:50:12,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:13,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621857301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:13,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:13,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2021-11-07 07:50:13,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526488904] [2021-11-07 07:50:13,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-11-07 07:50:13,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:13,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-11-07 07:50:13,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1921, Invalid=12599, Unknown=0, NotChecked=0, Total=14520 [2021-11-07 07:50:13,712 INFO L87 Difference]: Start difference. First operand 365 states and 365 transitions. Second operand has 121 states, 119 states have (on average 2.504201680672269) internal successors, (298), 62 states have internal predecessors, (298), 59 states have call successors, (59), 59 states have call predecessors, (59), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:16,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:16,816 INFO L93 Difference]: Finished difference Result 373 states and 373 transitions. [2021-11-07 07:50:16,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-11-07 07:50:16,816 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 119 states have (on average 2.504201680672269) internal successors, (298), 62 states have internal predecessors, (298), 59 states have call successors, (59), 59 states have call predecessors, (59), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 357 [2021-11-07 07:50:16,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:16,818 INFO L225 Difference]: With dead ends: 373 [2021-11-07 07:50:16,818 INFO L226 Difference]: Without dead ends: 372 [2021-11-07 07:50:16,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6584 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4680, Invalid=27540, Unknown=0, NotChecked=0, Total=32220 [2021-11-07 07:50:16,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-11-07 07:50:16,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 371. [2021-11-07 07:50:16,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 308 states have (on average 1.0064935064935066) internal successors, (310), 309 states have internal predecessors, (310), 61 states have call successors, (61), 61 states have call predecessors, (61), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 371 transitions. [2021-11-07 07:50:16,843 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 371 transitions. Word has length 357 [2021-11-07 07:50:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:16,843 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 371 transitions. [2021-11-07 07:50:16,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 119 states have (on average 2.504201680672269) internal successors, (298), 62 states have internal predecessors, (298), 59 states have call successors, (59), 59 states have call predecessors, (59), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 371 transitions. [2021-11-07 07:50:16,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2021-11-07 07:50:16,845 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:16,846 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 29, 29, 1, 1, 1, 1, 1] [2021-11-07 07:50:16,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-11-07 07:50:17,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:17,046 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:50:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:17,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1008886171, now seen corresponding path program 29 times [2021-11-07 07:50:17,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:17,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832570151] [2021-11-07 07:50:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:17,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5191 backedges. 0 proven. 5191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:20,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:20,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832570151] [2021-11-07 07:50:20,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832570151] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:20,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289857651] [2021-11-07 07:50:20,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:50:20,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:20,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:20,903 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:20,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-07 07:50:24,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-11-07 07:50:24,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:24,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 122 conjunts are in the unsatisfiable core [2021-11-07 07:50:24,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5191 backedges. 0 proven. 5191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:25,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289857651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:25,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:25,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2021-11-07 07:50:25,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878648018] [2021-11-07 07:50:25,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-07 07:50:25,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:25,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-07 07:50:25,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1983, Invalid=13023, Unknown=0, NotChecked=0, Total=15006 [2021-11-07 07:50:25,722 INFO L87 Difference]: Start difference. First operand 371 states and 371 transitions. Second operand has 123 states, 121 states have (on average 2.5041322314049586) internal successors, (303), 63 states have internal predecessors, (303), 60 states have call successors, (60), 60 states have call predecessors, (60), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:29,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:29,002 INFO L93 Difference]: Finished difference Result 379 states and 379 transitions. [2021-11-07 07:50:29,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-07 07:50:29,002 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 121 states have (on average 2.5041322314049586) internal successors, (303), 63 states have internal predecessors, (303), 60 states have call successors, (60), 60 states have call predecessors, (60), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 363 [2021-11-07 07:50:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:29,004 INFO L225 Difference]: With dead ends: 379 [2021-11-07 07:50:29,004 INFO L226 Difference]: Without dead ends: 378 [2021-11-07 07:50:29,006 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6816 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4833, Invalid=28473, Unknown=0, NotChecked=0, Total=33306 [2021-11-07 07:50:29,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-07 07:50:29,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 377. [2021-11-07 07:50:29,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 313 states have (on average 1.0063897763578276) internal successors, (315), 314 states have internal predecessors, (315), 62 states have call successors, (62), 62 states have call predecessors, (62), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:29,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 377 transitions. [2021-11-07 07:50:29,029 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 377 transitions. Word has length 363 [2021-11-07 07:50:29,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:29,029 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 377 transitions. [2021-11-07 07:50:29,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 121 states have (on average 2.5041322314049586) internal successors, (303), 63 states have internal predecessors, (303), 60 states have call successors, (60), 60 states have call predecessors, (60), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:29,029 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 377 transitions. [2021-11-07 07:50:29,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-11-07 07:50:29,031 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:29,032 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1] [2021-11-07 07:50:29,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-11-07 07:50:29,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:29,232 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:50:29,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:29,233 INFO L85 PathProgramCache]: Analyzing trace with hash -318199363, now seen corresponding path program 30 times [2021-11-07 07:50:29,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:29,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742514662] [2021-11-07 07:50:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:29,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:33,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:33,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742514662] [2021-11-07 07:50:33,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742514662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:33,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111384657] [2021-11-07 07:50:33,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:50:33,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:33,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:33,554 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:33,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-07 07:50:37,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-11-07 07:50:37,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:37,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-07 07:50:37,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:38,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111384657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:38,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:38,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2021-11-07 07:50:38,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122533218] [2021-11-07 07:50:38,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-11-07 07:50:38,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:38,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-11-07 07:50:38,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2047, Invalid=13453, Unknown=0, NotChecked=0, Total=15500 [2021-11-07 07:50:38,862 INFO L87 Difference]: Start difference. First operand 377 states and 377 transitions. Second operand has 125 states, 123 states have (on average 2.5040650406504064) internal successors, (308), 64 states have internal predecessors, (308), 61 states have call successors, (61), 61 states have call predecessors, (61), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:42,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:42,620 INFO L93 Difference]: Finished difference Result 385 states and 385 transitions. [2021-11-07 07:50:42,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-11-07 07:50:42,621 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 123 states have (on average 2.5040650406504064) internal successors, (308), 64 states have internal predecessors, (308), 61 states have call successors, (61), 61 states have call predecessors, (61), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 369 [2021-11-07 07:50:42,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:42,623 INFO L225 Difference]: With dead ends: 385 [2021-11-07 07:50:42,623 INFO L226 Difference]: Without dead ends: 384 [2021-11-07 07:50:42,625 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7051 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=4991, Invalid=29419, Unknown=0, NotChecked=0, Total=34410 [2021-11-07 07:50:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-07 07:50:42,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 383. [2021-11-07 07:50:42,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 318 states have (on average 1.0062893081761006) internal successors, (320), 319 states have internal predecessors, (320), 63 states have call successors, (63), 63 states have call predecessors, (63), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 383 transitions. [2021-11-07 07:50:42,660 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 383 transitions. Word has length 369 [2021-11-07 07:50:42,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:42,660 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 383 transitions. [2021-11-07 07:50:42,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 123 states have (on average 2.5040650406504064) internal successors, (308), 64 states have internal predecessors, (308), 61 states have call successors, (61), 61 states have call predecessors, (61), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:42,660 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 383 transitions. [2021-11-07 07:50:42,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2021-11-07 07:50:42,662 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:42,662 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 30, 30, 1, 1, 1, 1, 1] [2021-11-07 07:50:42,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-11-07 07:50:42,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:42,863 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:50:42,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:42,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1557297779, now seen corresponding path program 30 times [2021-11-07 07:50:42,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:42,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722647255] [2021-11-07 07:50:42,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:42,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:47,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:47,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:47,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722647255] [2021-11-07 07:50:47,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722647255] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:47,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616082737] [2021-11-07 07:50:47,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:50:47,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:47,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:47,412 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:47,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-07 07:50:51,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-11-07 07:50:51,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:51,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-07 07:50:51,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:52,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616082737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:52,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:52,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2021-11-07 07:50:52,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803928763] [2021-11-07 07:50:52,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-11-07 07:50:52,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:52,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-11-07 07:50:52,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2111, Invalid=13891, Unknown=0, NotChecked=0, Total=16002 [2021-11-07 07:50:52,885 INFO L87 Difference]: Start difference. First operand 383 states and 383 transitions. Second operand has 127 states, 125 states have (on average 2.504) internal successors, (313), 65 states have internal predecessors, (313), 62 states have call successors, (62), 62 states have call predecessors, (62), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:56,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:56,502 INFO L93 Difference]: Finished difference Result 391 states and 391 transitions. [2021-11-07 07:50:56,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-11-07 07:50:56,503 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 125 states have (on average 2.504) internal successors, (313), 65 states have internal predecessors, (313), 62 states have call successors, (62), 62 states have call predecessors, (62), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 375 [2021-11-07 07:50:56,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:56,505 INFO L225 Difference]: With dead ends: 391 [2021-11-07 07:50:56,505 INFO L226 Difference]: Without dead ends: 390 [2021-11-07 07:50:56,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7291 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=5149, Invalid=30383, Unknown=0, NotChecked=0, Total=35532 [2021-11-07 07:50:56,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-07 07:50:56,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 389. [2021-11-07 07:50:56,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 323 states have (on average 1.0061919504643964) internal successors, (325), 324 states have internal predecessors, (325), 64 states have call successors, (64), 64 states have call predecessors, (64), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:56,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 389 transitions. [2021-11-07 07:50:56,535 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 389 transitions. Word has length 375 [2021-11-07 07:50:56,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:56,536 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 389 transitions. [2021-11-07 07:50:56,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 125 states have (on average 2.504) internal successors, (313), 65 states have internal predecessors, (313), 62 states have call successors, (62), 62 states have call predecessors, (62), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:56,536 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 389 transitions. [2021-11-07 07:50:56,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2021-11-07 07:50:56,538 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:56,538 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1] [2021-11-07 07:50:56,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-11-07 07:50:56,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-11-07 07:50:56,739 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:50:56,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:56,740 INFO L85 PathProgramCache]: Analyzing trace with hash 462524463, now seen corresponding path program 31 times [2021-11-07 07:50:56,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:56,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60341601] [2021-11-07 07:50:56,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:56,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:01,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:01,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60341601] [2021-11-07 07:51:01,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60341601] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:01,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166678202] [2021-11-07 07:51:01,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:51:01,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:01,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:01,123 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:01,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-07 07:51:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:05,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 128 conjunts are in the unsatisfiable core [2021-11-07 07:51:05,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:06,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166678202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:06,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:06,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2021-11-07 07:51:06,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064226932] [2021-11-07 07:51:06,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-11-07 07:51:06,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:06,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-11-07 07:51:06,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2177, Invalid=14335, Unknown=0, NotChecked=0, Total=16512 [2021-11-07 07:51:06,490 INFO L87 Difference]: Start difference. First operand 389 states and 389 transitions. Second operand has 129 states, 127 states have (on average 2.5039370078740157) internal successors, (318), 66 states have internal predecessors, (318), 63 states have call successors, (63), 63 states have call predecessors, (63), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:10,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:10,158 INFO L93 Difference]: Finished difference Result 397 states and 397 transitions. [2021-11-07 07:51:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-11-07 07:51:10,158 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 127 states have (on average 2.5039370078740157) internal successors, (318), 66 states have internal predecessors, (318), 63 states have call successors, (63), 63 states have call predecessors, (63), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 381 [2021-11-07 07:51:10,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:10,160 INFO L225 Difference]: With dead ends: 397 [2021-11-07 07:51:10,160 INFO L226 Difference]: Without dead ends: 396 [2021-11-07 07:51:10,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7534 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=5312, Invalid=31360, Unknown=0, NotChecked=0, Total=36672 [2021-11-07 07:51:10,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-07 07:51:10,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 395. [2021-11-07 07:51:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 328 states have (on average 1.0060975609756098) internal successors, (330), 329 states have internal predecessors, (330), 65 states have call successors, (65), 65 states have call predecessors, (65), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 395 transitions. [2021-11-07 07:51:10,211 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 395 transitions. Word has length 381 [2021-11-07 07:51:10,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:10,211 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 395 transitions. [2021-11-07 07:51:10,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 127 states have (on average 2.5039370078740157) internal successors, (318), 66 states have internal predecessors, (318), 63 states have call successors, (63), 63 states have call predecessors, (63), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:10,212 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 395 transitions. [2021-11-07 07:51:10,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-11-07 07:51:10,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:10,286 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 31, 31, 1, 1, 1, 1, 1] [2021-11-07 07:51:10,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-11-07 07:51:10,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:10,487 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:51:10,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:10,488 INFO L85 PathProgramCache]: Analyzing trace with hash 863522431, now seen corresponding path program 31 times [2021-11-07 07:51:10,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:10,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833689928] [2021-11-07 07:51:10,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:10,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5921 backedges. 0 proven. 5921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:15,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:15,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833689928] [2021-11-07 07:51:15,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833689928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:15,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139091264] [2021-11-07 07:51:15,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:51:15,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:15,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:15,020 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:15,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-07 07:51:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:19,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 130 conjunts are in the unsatisfiable core [2021-11-07 07:51:19,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5921 backedges. 0 proven. 5921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:20,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139091264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:20,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:20,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2021-11-07 07:51:20,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578776197] [2021-11-07 07:51:20,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-07 07:51:20,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:20,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-07 07:51:20,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2243, Invalid=14787, Unknown=0, NotChecked=0, Total=17030 [2021-11-07 07:51:20,608 INFO L87 Difference]: Start difference. First operand 395 states and 395 transitions. Second operand has 131 states, 129 states have (on average 2.503875968992248) internal successors, (323), 67 states have internal predecessors, (323), 64 states have call successors, (64), 64 states have call predecessors, (64), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:24,314 INFO L93 Difference]: Finished difference Result 403 states and 403 transitions. [2021-11-07 07:51:24,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-11-07 07:51:24,314 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 129 states have (on average 2.503875968992248) internal successors, (323), 67 states have internal predecessors, (323), 64 states have call successors, (64), 64 states have call predecessors, (64), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 387 [2021-11-07 07:51:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:24,316 INFO L225 Difference]: With dead ends: 403 [2021-11-07 07:51:24,316 INFO L226 Difference]: Without dead ends: 402 [2021-11-07 07:51:24,319 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7782 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5475, Invalid=32355, Unknown=0, NotChecked=0, Total=37830 [2021-11-07 07:51:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-07 07:51:24,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 401. [2021-11-07 07:51:24,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 333 states have (on average 1.006006006006006) internal successors, (335), 334 states have internal predecessors, (335), 66 states have call successors, (66), 66 states have call predecessors, (66), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 401 transitions. [2021-11-07 07:51:24,346 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 401 transitions. Word has length 387 [2021-11-07 07:51:24,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:24,347 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 401 transitions. [2021-11-07 07:51:24,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 129 states have (on average 2.503875968992248) internal successors, (323), 67 states have internal predecessors, (323), 64 states have call successors, (64), 64 states have call predecessors, (64), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:24,347 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 401 transitions. [2021-11-07 07:51:24,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-11-07 07:51:24,349 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:24,349 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1] [2021-11-07 07:51:24,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:24,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-07 07:51:24,550 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:51:24,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:24,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1404413023, now seen corresponding path program 32 times [2021-11-07 07:51:24,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:24,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678048725] [2021-11-07 07:51:24,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:24,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:29,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:29,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678048725] [2021-11-07 07:51:29,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678048725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:29,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304395287] [2021-11-07 07:51:29,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:51:29,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:29,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:29,329 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:29,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-07 07:51:33,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:51:33,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:33,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-07 07:51:33,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:34,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304395287] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:34,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:34,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 132 [2021-11-07 07:51:34,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058358101] [2021-11-07 07:51:34,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2021-11-07 07:51:34,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:34,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-11-07 07:51:34,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2311, Invalid=15245, Unknown=0, NotChecked=0, Total=17556 [2021-11-07 07:51:34,971 INFO L87 Difference]: Start difference. First operand 401 states and 401 transitions. Second operand has 133 states, 131 states have (on average 2.50381679389313) internal successors, (328), 68 states have internal predecessors, (328), 65 states have call successors, (65), 65 states have call predecessors, (65), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:38,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:38,754 INFO L93 Difference]: Finished difference Result 409 states and 409 transitions. [2021-11-07 07:51:38,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-11-07 07:51:38,755 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 131 states have (on average 2.50381679389313) internal successors, (328), 68 states have internal predecessors, (328), 65 states have call successors, (65), 65 states have call predecessors, (65), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 393 [2021-11-07 07:51:38,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:38,757 INFO L225 Difference]: With dead ends: 409 [2021-11-07 07:51:38,757 INFO L226 Difference]: Without dead ends: 408 [2021-11-07 07:51:38,759 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8033 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=5643, Invalid=33363, Unknown=0, NotChecked=0, Total=39006 [2021-11-07 07:51:38,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-11-07 07:51:38,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 407. [2021-11-07 07:51:38,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 338 states have (on average 1.0059171597633136) internal successors, (340), 339 states have internal predecessors, (340), 67 states have call successors, (67), 67 states have call predecessors, (67), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 407 transitions. [2021-11-07 07:51:38,787 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 407 transitions. Word has length 393 [2021-11-07 07:51:38,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:38,788 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 407 transitions. [2021-11-07 07:51:38,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 131 states have (on average 2.50381679389313) internal successors, (328), 68 states have internal predecessors, (328), 65 states have call successors, (65), 65 states have call predecessors, (65), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:38,788 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 407 transitions. [2021-11-07 07:51:38,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2021-11-07 07:51:38,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:38,791 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 32, 32, 1, 1, 1, 1, 1] [2021-11-07 07:51:38,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-11-07 07:51:38,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-07 07:51:38,991 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:51:38,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:38,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2041789553, now seen corresponding path program 32 times [2021-11-07 07:51:38,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:38,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086748618] [2021-11-07 07:51:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:38,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6304 backedges. 0 proven. 6304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:43,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:43,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086748618] [2021-11-07 07:51:43,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086748618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:43,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065945289] [2021-11-07 07:51:43,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:51:43,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:43,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:43,713 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:43,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-07 07:51:48,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:51:48,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:48,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 134 conjunts are in the unsatisfiable core [2021-11-07 07:51:48,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6304 backedges. 0 proven. 6304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:49,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065945289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:49,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:49,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 134 [2021-11-07 07:51:49,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217535196] [2021-11-07 07:51:49,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2021-11-07 07:51:49,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:49,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-11-07 07:51:49,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2379, Invalid=15711, Unknown=0, NotChecked=0, Total=18090 [2021-11-07 07:51:49,359 INFO L87 Difference]: Start difference. First operand 407 states and 407 transitions. Second operand has 135 states, 133 states have (on average 2.5037593984962405) internal successors, (333), 69 states have internal predecessors, (333), 66 states have call successors, (66), 66 states have call predecessors, (66), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:53,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:53,248 INFO L93 Difference]: Finished difference Result 415 states and 415 transitions. [2021-11-07 07:51:53,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-11-07 07:51:53,249 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 133 states have (on average 2.5037593984962405) internal successors, (333), 69 states have internal predecessors, (333), 66 states have call successors, (66), 66 states have call predecessors, (66), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 399 [2021-11-07 07:51:53,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:53,251 INFO L225 Difference]: With dead ends: 415 [2021-11-07 07:51:53,251 INFO L226 Difference]: Without dead ends: 414 [2021-11-07 07:51:53,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8289 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=5811, Invalid=34389, Unknown=0, NotChecked=0, Total=40200 [2021-11-07 07:51:53,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-07 07:51:53,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 413. [2021-11-07 07:51:53,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 343 states have (on average 1.0058309037900874) internal successors, (345), 344 states have internal predecessors, (345), 68 states have call successors, (68), 68 states have call predecessors, (68), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:53,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 413 transitions. [2021-11-07 07:51:53,286 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 413 transitions. Word has length 399 [2021-11-07 07:51:53,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:53,286 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 413 transitions. [2021-11-07 07:51:53,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 133 states have (on average 2.5037593984962405) internal successors, (333), 69 states have internal predecessors, (333), 66 states have call successors, (66), 66 states have call predecessors, (66), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:53,287 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 413 transitions. [2021-11-07 07:51:53,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2021-11-07 07:51:53,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:53,289 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1] [2021-11-07 07:51:53,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:53,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:53,490 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:51:53,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:53,490 INFO L85 PathProgramCache]: Analyzing trace with hash 92507155, now seen corresponding path program 33 times [2021-11-07 07:51:53,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:53,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641871629] [2021-11-07 07:51:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:53,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:58,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:58,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641871629] [2021-11-07 07:51:58,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641871629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:58,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622109310] [2021-11-07 07:51:58,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:51:58,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:58,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:58,293 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:58,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-07 07:52:03,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-11-07 07:52:03,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:03,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 136 conjunts are in the unsatisfiable core [2021-11-07 07:52:03,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:04,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622109310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:04,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:04,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 136 [2021-11-07 07:52:04,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486876277] [2021-11-07 07:52:04,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2021-11-07 07:52:04,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:04,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-11-07 07:52:04,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=16183, Unknown=0, NotChecked=0, Total=18632 [2021-11-07 07:52:04,188 INFO L87 Difference]: Start difference. First operand 413 states and 413 transitions. Second operand has 137 states, 135 states have (on average 2.5037037037037035) internal successors, (338), 70 states have internal predecessors, (338), 67 states have call successors, (67), 67 states have call predecessors, (67), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:08,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:08,210 INFO L93 Difference]: Finished difference Result 421 states and 421 transitions. [2021-11-07 07:52:08,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-11-07 07:52:08,210 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 135 states have (on average 2.5037037037037035) internal successors, (338), 70 states have internal predecessors, (338), 67 states have call successors, (67), 67 states have call predecessors, (67), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 405 [2021-11-07 07:52:08,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:08,212 INFO L225 Difference]: With dead ends: 421 [2021-11-07 07:52:08,212 INFO L226 Difference]: Without dead ends: 420 [2021-11-07 07:52:08,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8548 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=5984, Invalid=35428, Unknown=0, NotChecked=0, Total=41412 [2021-11-07 07:52:08,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-07 07:52:08,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 419. [2021-11-07 07:52:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 348 states have (on average 1.0057471264367817) internal successors, (350), 349 states have internal predecessors, (350), 69 states have call successors, (69), 69 states have call predecessors, (69), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 419 transitions. [2021-11-07 07:52:08,248 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 419 transitions. Word has length 405 [2021-11-07 07:52:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:08,249 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 419 transitions. [2021-11-07 07:52:08,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 135 states have (on average 2.5037037037037035) internal successors, (338), 70 states have internal predecessors, (338), 67 states have call successors, (67), 67 states have call predecessors, (67), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:08,249 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 419 transitions. [2021-11-07 07:52:08,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-11-07 07:52:08,252 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:08,252 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 33, 33, 1, 1, 1, 1, 1] [2021-11-07 07:52:08,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-11-07 07:52:08,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-07 07:52:08,474 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:52:08,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:08,474 INFO L85 PathProgramCache]: Analyzing trace with hash -36778141, now seen corresponding path program 33 times [2021-11-07 07:52:08,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:08,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675915874] [2021-11-07 07:52:08,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:08,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6699 backedges. 0 proven. 6699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:13,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:13,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675915874] [2021-11-07 07:52:13,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675915874] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:13,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807869603] [2021-11-07 07:52:13,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:52:13,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:13,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:13,392 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:13,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-07 07:52:18,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-11-07 07:52:18,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:18,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 138 conjunts are in the unsatisfiable core [2021-11-07 07:52:18,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6699 backedges. 0 proven. 6699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:19,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807869603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:19,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:19,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 138 [2021-11-07 07:52:19,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336211607] [2021-11-07 07:52:19,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2021-11-07 07:52:19,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:19,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-11-07 07:52:19,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2519, Invalid=16663, Unknown=0, NotChecked=0, Total=19182 [2021-11-07 07:52:19,508 INFO L87 Difference]: Start difference. First operand 419 states and 419 transitions. Second operand has 139 states, 137 states have (on average 2.5036496350364965) internal successors, (343), 71 states have internal predecessors, (343), 68 states have call successors, (68), 68 states have call predecessors, (68), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:23,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:23,594 INFO L93 Difference]: Finished difference Result 427 states and 427 transitions. [2021-11-07 07:52:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-11-07 07:52:23,595 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 137 states have (on average 2.5036496350364965) internal successors, (343), 71 states have internal predecessors, (343), 68 states have call successors, (68), 68 states have call predecessors, (68), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 411 [2021-11-07 07:52:23,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:23,597 INFO L225 Difference]: With dead ends: 427 [2021-11-07 07:52:23,597 INFO L226 Difference]: Without dead ends: 426 [2021-11-07 07:52:23,600 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8812 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=6157, Invalid=36485, Unknown=0, NotChecked=0, Total=42642 [2021-11-07 07:52:23,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-11-07 07:52:23,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 425. [2021-11-07 07:52:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 353 states have (on average 1.0056657223796035) internal successors, (355), 354 states have internal predecessors, (355), 70 states have call successors, (70), 70 states have call predecessors, (70), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 425 transitions. [2021-11-07 07:52:23,632 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 425 transitions. Word has length 411 [2021-11-07 07:52:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:23,633 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 425 transitions. [2021-11-07 07:52:23,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 137 states have (on average 2.5036496350364965) internal successors, (343), 71 states have internal predecessors, (343), 68 states have call successors, (68), 68 states have call predecessors, (68), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 425 transitions. [2021-11-07 07:52:23,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2021-11-07 07:52:23,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:23,635 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1] [2021-11-07 07:52:23,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-11-07 07:52:23,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:23,836 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:52:23,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:23,836 INFO L85 PathProgramCache]: Analyzing trace with hash 416129413, now seen corresponding path program 34 times [2021-11-07 07:52:23,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:23,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540248818] [2021-11-07 07:52:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:23,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:28,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:28,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:28,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540248818] [2021-11-07 07:52:28,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540248818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:28,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207749248] [2021-11-07 07:52:28,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:52:28,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:28,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:28,836 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:28,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-07 07:52:33,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:52:33,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:33,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 140 conjunts are in the unsatisfiable core [2021-11-07 07:52:33,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:35,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207749248] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:35,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:35,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140] total 140 [2021-11-07 07:52:35,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991674743] [2021-11-07 07:52:35,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2021-11-07 07:52:35,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:35,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-11-07 07:52:35,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2591, Invalid=17149, Unknown=0, NotChecked=0, Total=19740 [2021-11-07 07:52:35,046 INFO L87 Difference]: Start difference. First operand 425 states and 425 transitions. Second operand has 141 states, 139 states have (on average 2.5035971223021583) internal successors, (348), 72 states have internal predecessors, (348), 69 states have call successors, (69), 69 states have call predecessors, (69), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:39,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:39,154 INFO L93 Difference]: Finished difference Result 433 states and 433 transitions. [2021-11-07 07:52:39,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-11-07 07:52:39,155 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 139 states have (on average 2.5035971223021583) internal successors, (348), 72 states have internal predecessors, (348), 69 states have call successors, (69), 69 states have call predecessors, (69), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 417 [2021-11-07 07:52:39,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:39,158 INFO L225 Difference]: With dead ends: 433 [2021-11-07 07:52:39,158 INFO L226 Difference]: Without dead ends: 432 [2021-11-07 07:52:39,161 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9079 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=6335, Invalid=37555, Unknown=0, NotChecked=0, Total=43890 [2021-11-07 07:52:39,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-07 07:52:39,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 431. [2021-11-07 07:52:39,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 358 states have (on average 1.005586592178771) internal successors, (360), 359 states have internal predecessors, (360), 71 states have call successors, (71), 71 states have call predecessors, (71), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:39,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 431 transitions. [2021-11-07 07:52:39,195 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 431 transitions. Word has length 417 [2021-11-07 07:52:39,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:39,195 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 431 transitions. [2021-11-07 07:52:39,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 139 states have (on average 2.5035971223021583) internal successors, (348), 72 states have internal predecessors, (348), 69 states have call successors, (69), 69 states have call predecessors, (69), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:39,196 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 431 transitions. [2021-11-07 07:52:39,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2021-11-07 07:52:39,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:39,198 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 34, 34, 1, 1, 1, 1, 1] [2021-11-07 07:52:39,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-11-07 07:52:39,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:39,399 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:52:39,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:39,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1660651349, now seen corresponding path program 34 times [2021-11-07 07:52:39,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:39,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586455840] [2021-11-07 07:52:39,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:39,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:44,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7106 backedges. 0 proven. 7106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:44,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:44,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586455840] [2021-11-07 07:52:44,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586455840] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:44,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627810319] [2021-11-07 07:52:44,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:52:44,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:44,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:44,525 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:44,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-07 07:52:49,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:52:49,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:49,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 142 conjunts are in the unsatisfiable core [2021-11-07 07:52:49,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7106 backedges. 0 proven. 7106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:50,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627810319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:50,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:50,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [142, 142] total 142 [2021-11-07 07:52:50,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270583523] [2021-11-07 07:52:50,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2021-11-07 07:52:50,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:50,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2021-11-07 07:52:50,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2663, Invalid=17643, Unknown=0, NotChecked=0, Total=20306 [2021-11-07 07:52:50,730 INFO L87 Difference]: Start difference. First operand 431 states and 431 transitions. Second operand has 143 states, 141 states have (on average 2.50354609929078) internal successors, (353), 73 states have internal predecessors, (353), 70 states have call successors, (70), 70 states have call predecessors, (70), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:54,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:54,921 INFO L93 Difference]: Finished difference Result 439 states and 439 transitions. [2021-11-07 07:52:54,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-11-07 07:52:54,921 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 141 states have (on average 2.50354609929078) internal successors, (353), 73 states have internal predecessors, (353), 70 states have call successors, (70), 70 states have call predecessors, (70), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 423 [2021-11-07 07:52:54,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:54,923 INFO L225 Difference]: With dead ends: 439 [2021-11-07 07:52:54,923 INFO L226 Difference]: Without dead ends: 438 [2021-11-07 07:52:54,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9351 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=6513, Invalid=38643, Unknown=0, NotChecked=0, Total=45156 [2021-11-07 07:52:54,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-07 07:52:54,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 437. [2021-11-07 07:52:54,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 363 states have (on average 1.0055096418732783) internal successors, (365), 364 states have internal predecessors, (365), 72 states have call successors, (72), 72 states have call predecessors, (72), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:54,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 437 transitions. [2021-11-07 07:52:54,958 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 437 transitions. Word has length 423 [2021-11-07 07:52:54,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:54,959 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 437 transitions. [2021-11-07 07:52:54,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 141 states have (on average 2.50354609929078) internal successors, (353), 73 states have internal predecessors, (353), 70 states have call successors, (70), 70 states have call predecessors, (70), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:54,959 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 437 transitions. [2021-11-07 07:52:54,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-11-07 07:52:54,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:54,961 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1] [2021-11-07 07:52:54,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-11-07 07:52:55,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:55,162 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:52:55,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:55,162 INFO L85 PathProgramCache]: Analyzing trace with hash -2097603593, now seen corresponding path program 35 times [2021-11-07 07:52:55,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:55,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271704579] [2021-11-07 07:52:55,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:55,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:00,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:00,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271704579] [2021-11-07 07:53:00,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271704579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:00,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3883274] [2021-11-07 07:53:00,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:53:00,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:00,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:00,242 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:00,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-07 07:53:05,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-11-07 07:53:05,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:53:05,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 144 conjunts are in the unsatisfiable core [2021-11-07 07:53:05,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:06,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3883274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:06,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:06,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144] total 144 [2021-11-07 07:53:06,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734759177] [2021-11-07 07:53:06,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2021-11-07 07:53:06,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:06,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-11-07 07:53:06,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2737, Invalid=18143, Unknown=0, NotChecked=0, Total=20880 [2021-11-07 07:53:06,714 INFO L87 Difference]: Start difference. First operand 437 states and 437 transitions. Second operand has 145 states, 143 states have (on average 2.5034965034965033) internal successors, (358), 74 states have internal predecessors, (358), 71 states have call successors, (71), 71 states have call predecessors, (71), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:11,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:11,134 INFO L93 Difference]: Finished difference Result 445 states and 445 transitions. [2021-11-07 07:53:11,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-11-07 07:53:11,134 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 143 states have (on average 2.5034965034965033) internal successors, (358), 74 states have internal predecessors, (358), 71 states have call successors, (71), 71 states have call predecessors, (71), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-11-07 07:53:11,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:11,136 INFO L225 Difference]: With dead ends: 445 [2021-11-07 07:53:11,136 INFO L226 Difference]: Without dead ends: 444 [2021-11-07 07:53:11,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9626 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=6696, Invalid=39744, Unknown=0, NotChecked=0, Total=46440 [2021-11-07 07:53:11,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-07 07:53:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 443. [2021-11-07 07:53:11,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 368 states have (on average 1.0054347826086956) internal successors, (370), 369 states have internal predecessors, (370), 73 states have call successors, (73), 73 states have call predecessors, (73), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:11,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 443 transitions. [2021-11-07 07:53:11,177 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 443 transitions. Word has length 429 [2021-11-07 07:53:11,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:11,178 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 443 transitions. [2021-11-07 07:53:11,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 143 states have (on average 2.5034965034965033) internal successors, (358), 74 states have internal predecessors, (358), 71 states have call successors, (71), 71 states have call predecessors, (71), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:11,178 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 443 transitions. [2021-11-07 07:53:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2021-11-07 07:53:11,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:11,180 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 35, 35, 1, 1, 1, 1, 1] [2021-11-07 07:53:11,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-11-07 07:53:11,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-11-07 07:53:11,381 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:53:11,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:11,381 INFO L85 PathProgramCache]: Analyzing trace with hash -2018909113, now seen corresponding path program 35 times [2021-11-07 07:53:11,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:11,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664367828] [2021-11-07 07:53:11,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:11,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7525 backedges. 0 proven. 7525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:16,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:16,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664367828] [2021-11-07 07:53:16,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664367828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:16,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576019986] [2021-11-07 07:53:16,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:53:16,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:16,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:16,845 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:16,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-07 07:53:22,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-11-07 07:53:22,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:53:22,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 146 conjunts are in the unsatisfiable core [2021-11-07 07:53:22,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7525 backedges. 0 proven. 7525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:23,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576019986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:23,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:23,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146] total 146 [2021-11-07 07:53:23,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210682566] [2021-11-07 07:53:23,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2021-11-07 07:53:23,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:23,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2021-11-07 07:53:23,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2811, Invalid=18651, Unknown=0, NotChecked=0, Total=21462 [2021-11-07 07:53:23,561 INFO L87 Difference]: Start difference. First operand 443 states and 443 transitions. Second operand has 147 states, 145 states have (on average 2.503448275862069) internal successors, (363), 75 states have internal predecessors, (363), 72 states have call successors, (72), 72 states have call predecessors, (72), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:27,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:27,952 INFO L93 Difference]: Finished difference Result 451 states and 451 transitions. [2021-11-07 07:53:27,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-11-07 07:53:27,953 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 145 states have (on average 2.503448275862069) internal successors, (363), 75 states have internal predecessors, (363), 72 states have call successors, (72), 72 states have call predecessors, (72), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 435 [2021-11-07 07:53:27,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:27,955 INFO L225 Difference]: With dead ends: 451 [2021-11-07 07:53:27,955 INFO L226 Difference]: Without dead ends: 450 [2021-11-07 07:53:27,958 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9906 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=6879, Invalid=40863, Unknown=0, NotChecked=0, Total=47742 [2021-11-07 07:53:27,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-07 07:53:28,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 449. [2021-11-07 07:53:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 373 states have (on average 1.0053619302949062) internal successors, (375), 374 states have internal predecessors, (375), 74 states have call successors, (74), 74 states have call predecessors, (74), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 449 transitions. [2021-11-07 07:53:28,011 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 449 transitions. Word has length 435 [2021-11-07 07:53:28,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:28,012 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 449 transitions. [2021-11-07 07:53:28,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 145 states have (on average 2.503448275862069) internal successors, (363), 75 states have internal predecessors, (363), 72 states have call successors, (72), 72 states have call predecessors, (72), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:28,013 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 449 transitions. [2021-11-07 07:53:28,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2021-11-07 07:53:28,016 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:28,016 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1] [2021-11-07 07:53:28,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-11-07 07:53:28,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:28,226 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:53:28,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:28,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1407812759, now seen corresponding path program 36 times [2021-11-07 07:53:28,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:28,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141668075] [2021-11-07 07:53:28,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:28,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 0 proven. 7740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:33,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:33,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141668075] [2021-11-07 07:53:33,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141668075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:33,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094394504] [2021-11-07 07:53:33,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:53:33,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:33,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:33,592 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:33,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-07 07:53:39,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-11-07 07:53:39,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:53:39,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 148 conjunts are in the unsatisfiable core [2021-11-07 07:53:39,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 0 proven. 7740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:40,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094394504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:40,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:40,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [148, 148] total 148 [2021-11-07 07:53:40,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620132136] [2021-11-07 07:53:40,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2021-11-07 07:53:40,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:40,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2021-11-07 07:53:40,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2887, Invalid=19165, Unknown=0, NotChecked=0, Total=22052 [2021-11-07 07:53:40,541 INFO L87 Difference]: Start difference. First operand 449 states and 449 transitions. Second operand has 149 states, 147 states have (on average 2.503401360544218) internal successors, (368), 76 states have internal predecessors, (368), 73 states have call successors, (73), 73 states have call predecessors, (73), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:45,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:45,284 INFO L93 Difference]: Finished difference Result 457 states and 457 transitions. [2021-11-07 07:53:45,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-11-07 07:53:45,285 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 147 states have (on average 2.503401360544218) internal successors, (368), 76 states have internal predecessors, (368), 73 states have call successors, (73), 73 states have call predecessors, (73), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 441 [2021-11-07 07:53:45,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:45,287 INFO L225 Difference]: With dead ends: 457 [2021-11-07 07:53:45,287 INFO L226 Difference]: Without dead ends: 456 [2021-11-07 07:53:45,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10189 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=7067, Invalid=41995, Unknown=0, NotChecked=0, Total=49062 [2021-11-07 07:53:45,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-11-07 07:53:45,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 455. [2021-11-07 07:53:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 378 states have (on average 1.0052910052910053) internal successors, (380), 379 states have internal predecessors, (380), 75 states have call successors, (75), 75 states have call predecessors, (75), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:45,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 455 transitions. [2021-11-07 07:53:45,325 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 455 transitions. Word has length 441 [2021-11-07 07:53:45,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:45,325 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 455 transitions. [2021-11-07 07:53:45,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 147 states have (on average 2.503401360544218) internal successors, (368), 76 states have internal predecessors, (368), 73 states have call successors, (73), 73 states have call predecessors, (73), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:45,326 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 455 transitions. [2021-11-07 07:53:45,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2021-11-07 07:53:45,328 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:45,328 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 36, 36, 1, 1, 1, 1, 1] [2021-11-07 07:53:45,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-11-07 07:53:45,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:45,529 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:53:45,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:45,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1517656519, now seen corresponding path program 36 times [2021-11-07 07:53:45,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:45,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748592481] [2021-11-07 07:53:45,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:45,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7956 backedges. 0 proven. 7956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:51,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:51,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748592481] [2021-11-07 07:53:51,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748592481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:51,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755072592] [2021-11-07 07:53:51,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:53:51,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:51,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:51,076 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:51,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-07 07:53:56,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-11-07 07:53:56,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:53:56,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 150 conjunts are in the unsatisfiable core [2021-11-07 07:53:56,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7956 backedges. 0 proven. 7956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:58,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755072592] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:58,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:58,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [150, 150] total 150 [2021-11-07 07:53:58,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164325952] [2021-11-07 07:53:58,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2021-11-07 07:53:58,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:58,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-11-07 07:53:58,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2963, Invalid=19687, Unknown=0, NotChecked=0, Total=22650 [2021-11-07 07:53:58,079 INFO L87 Difference]: Start difference. First operand 455 states and 455 transitions. Second operand has 151 states, 149 states have (on average 2.5033557046979866) internal successors, (373), 77 states have internal predecessors, (373), 74 states have call successors, (74), 74 states have call predecessors, (74), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:02,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:02,800 INFO L93 Difference]: Finished difference Result 463 states and 463 transitions. [2021-11-07 07:54:02,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-11-07 07:54:02,801 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 149 states have (on average 2.5033557046979866) internal successors, (373), 77 states have internal predecessors, (373), 74 states have call successors, (74), 74 states have call predecessors, (74), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 447 [2021-11-07 07:54:02,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:02,803 INFO L225 Difference]: With dead ends: 463 [2021-11-07 07:54:02,803 INFO L226 Difference]: Without dead ends: 462 [2021-11-07 07:54:02,806 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10477 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=7255, Invalid=43145, Unknown=0, NotChecked=0, Total=50400 [2021-11-07 07:54:02,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-07 07:54:02,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 461. [2021-11-07 07:54:02,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 383 states have (on average 1.0052219321148825) internal successors, (385), 384 states have internal predecessors, (385), 76 states have call successors, (76), 76 states have call predecessors, (76), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:02,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 461 transitions. [2021-11-07 07:54:02,843 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 461 transitions. Word has length 447 [2021-11-07 07:54:02,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:02,844 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 461 transitions. [2021-11-07 07:54:02,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 149 states have (on average 2.5033557046979866) internal successors, (373), 77 states have internal predecessors, (373), 74 states have call successors, (74), 74 states have call predecessors, (74), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:02,844 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 461 transitions. [2021-11-07 07:54:02,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-11-07 07:54:02,848 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:02,848 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1] [2021-11-07 07:54:02,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:03,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-11-07 07:54:03,062 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:54:03,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:03,062 INFO L85 PathProgramCache]: Analyzing trace with hash -411680805, now seen corresponding path program 37 times [2021-11-07 07:54:03,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:03,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634733771] [2021-11-07 07:54:03,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:03,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:08,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 8177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:08,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:08,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634733771] [2021-11-07 07:54:08,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634733771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:08,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498209510] [2021-11-07 07:54:08,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:54:08,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:08,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:08,403 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:08,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-07 07:54:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:13,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 152 conjunts are in the unsatisfiable core [2021-11-07 07:54:13,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 8177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:14,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498209510] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:14,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:14,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [152, 152] total 152 [2021-11-07 07:54:14,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190488233] [2021-11-07 07:54:14,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2021-11-07 07:54:14,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:14,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2021-11-07 07:54:14,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3041, Invalid=20215, Unknown=0, NotChecked=0, Total=23256 [2021-11-07 07:54:14,911 INFO L87 Difference]: Start difference. First operand 461 states and 461 transitions. Second operand has 153 states, 151 states have (on average 2.5033112582781456) internal successors, (378), 78 states have internal predecessors, (378), 75 states have call successors, (75), 75 states have call predecessors, (75), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:19,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:19,513 INFO L93 Difference]: Finished difference Result 469 states and 469 transitions. [2021-11-07 07:54:19,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2021-11-07 07:54:19,513 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 151 states have (on average 2.5033112582781456) internal successors, (378), 78 states have internal predecessors, (378), 75 states have call successors, (75), 75 states have call predecessors, (75), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-11-07 07:54:19,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:19,515 INFO L225 Difference]: With dead ends: 469 [2021-11-07 07:54:19,515 INFO L226 Difference]: Without dead ends: 468 [2021-11-07 07:54:19,519 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10768 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=7448, Invalid=44308, Unknown=0, NotChecked=0, Total=51756 [2021-11-07 07:54:19,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-07 07:54:19,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 467. [2021-11-07 07:54:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 388 states have (on average 1.0051546391752577) internal successors, (390), 389 states have internal predecessors, (390), 77 states have call successors, (77), 77 states have call predecessors, (77), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:19,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 467 transitions. [2021-11-07 07:54:19,555 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 467 transitions. Word has length 453 [2021-11-07 07:54:19,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:19,556 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 467 transitions. [2021-11-07 07:54:19,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 151 states have (on average 2.5033112582781456) internal successors, (378), 78 states have internal predecessors, (378), 75 states have call successors, (75), 75 states have call predecessors, (75), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 467 transitions. [2021-11-07 07:54:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2021-11-07 07:54:19,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:19,559 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 37, 37, 1, 1, 1, 1, 1] [2021-11-07 07:54:19,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-11-07 07:54:19,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:19,759 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:54:19,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:19,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1905102123, now seen corresponding path program 37 times [2021-11-07 07:54:19,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:19,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687183279] [2021-11-07 07:54:19,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:19,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8399 backedges. 0 proven. 8399 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:25,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:25,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687183279] [2021-11-07 07:54:25,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687183279] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:25,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335905517] [2021-11-07 07:54:25,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:54:25,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:25,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:25,251 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:25,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-07 07:54:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:30,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 154 conjunts are in the unsatisfiable core [2021-11-07 07:54:30,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8399 backedges. 0 proven. 8399 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:31,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335905517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:31,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:31,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [154, 154] total 154 [2021-11-07 07:54:31,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987711176] [2021-11-07 07:54:31,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2021-11-07 07:54:31,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:31,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2021-11-07 07:54:31,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3119, Invalid=20751, Unknown=0, NotChecked=0, Total=23870 [2021-11-07 07:54:31,874 INFO L87 Difference]: Start difference. First operand 467 states and 467 transitions. Second operand has 155 states, 153 states have (on average 2.503267973856209) internal successors, (383), 79 states have internal predecessors, (383), 76 states have call successors, (76), 76 states have call predecessors, (76), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:36,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:36,600 INFO L93 Difference]: Finished difference Result 475 states and 475 transitions. [2021-11-07 07:54:36,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-11-07 07:54:36,600 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 153 states have (on average 2.503267973856209) internal successors, (383), 79 states have internal predecessors, (383), 76 states have call successors, (76), 76 states have call predecessors, (76), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 459 [2021-11-07 07:54:36,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:36,603 INFO L225 Difference]: With dead ends: 475 [2021-11-07 07:54:36,603 INFO L226 Difference]: Without dead ends: 474 [2021-11-07 07:54:36,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11064 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=7641, Invalid=45489, Unknown=0, NotChecked=0, Total=53130 [2021-11-07 07:54:36,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-07 07:54:36,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 473. [2021-11-07 07:54:36,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 393 states have (on average 1.005089058524173) internal successors, (395), 394 states have internal predecessors, (395), 78 states have call successors, (78), 78 states have call predecessors, (78), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:36,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 473 transitions. [2021-11-07 07:54:36,645 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 473 transitions. Word has length 459 [2021-11-07 07:54:36,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:36,645 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 473 transitions. [2021-11-07 07:54:36,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 153 states have (on average 2.503267973856209) internal successors, (383), 79 states have internal predecessors, (383), 76 states have call successors, (76), 76 states have call predecessors, (76), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:36,646 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 473 transitions. [2021-11-07 07:54:36,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2021-11-07 07:54:36,648 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:36,648 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1] [2021-11-07 07:54:36,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:36,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:36,849 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:54:36,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:36,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1817646771, now seen corresponding path program 38 times [2021-11-07 07:54:36,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:36,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707661088] [2021-11-07 07:54:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:36,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 0 proven. 8626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:42,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:42,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707661088] [2021-11-07 07:54:42,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707661088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:42,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380903628] [2021-11-07 07:54:42,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:54:42,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:42,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:42,984 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:42,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-07 07:54:49,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:54:49,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:49,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 156 conjunts are in the unsatisfiable core [2021-11-07 07:54:49,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 0 proven. 8626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:50,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380903628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:50,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:50,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [156, 156] total 156 [2021-11-07 07:54:50,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577297854] [2021-11-07 07:54:50,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2021-11-07 07:54:50,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:50,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2021-11-07 07:54:50,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3199, Invalid=21293, Unknown=0, NotChecked=0, Total=24492 [2021-11-07 07:54:50,343 INFO L87 Difference]: Start difference. First operand 473 states and 473 transitions. Second operand has 157 states, 155 states have (on average 2.503225806451613) internal successors, (388), 80 states have internal predecessors, (388), 77 states have call successors, (77), 77 states have call predecessors, (77), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:55,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:55,725 INFO L93 Difference]: Finished difference Result 481 states and 481 transitions. [2021-11-07 07:54:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2021-11-07 07:54:55,725 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 155 states have (on average 2.503225806451613) internal successors, (388), 80 states have internal predecessors, (388), 77 states have call successors, (77), 77 states have call predecessors, (77), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 465 [2021-11-07 07:54:55,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:55,727 INFO L225 Difference]: With dead ends: 481 [2021-11-07 07:54:55,728 INFO L226 Difference]: Without dead ends: 480 [2021-11-07 07:54:55,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11363 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=7839, Invalid=46683, Unknown=0, NotChecked=0, Total=54522 [2021-11-07 07:54:55,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-11-07 07:54:55,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 479. [2021-11-07 07:54:55,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 398 states have (on average 1.0050251256281406) internal successors, (400), 399 states have internal predecessors, (400), 79 states have call successors, (79), 79 states have call predecessors, (79), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:55,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 479 transitions. [2021-11-07 07:54:55,770 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 479 transitions. Word has length 465 [2021-11-07 07:54:55,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:55,770 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 479 transitions. [2021-11-07 07:54:55,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 155 states have (on average 2.503225806451613) internal successors, (388), 80 states have internal predecessors, (388), 77 states have call successors, (77), 77 states have call predecessors, (77), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:55,770 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 479 transitions. [2021-11-07 07:54:55,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2021-11-07 07:54:55,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:55,773 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 38, 38, 1, 1, 1, 1, 1] [2021-11-07 07:54:55,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:55,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:55,978 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:54:55,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:55,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1004787997, now seen corresponding path program 38 times [2021-11-07 07:54:55,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:55,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806568717] [2021-11-07 07:54:55,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:55,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8854 backedges. 0 proven. 8854 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:02,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:02,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806568717] [2021-11-07 07:55:02,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806568717] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:02,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289577782] [2021-11-07 07:55:02,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:55:02,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:02,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:02,833 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:02,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-07 07:55:09,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:55:09,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:09,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 158 conjunts are in the unsatisfiable core [2021-11-07 07:55:09,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8854 backedges. 0 proven. 8854 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:11,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289577782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:11,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:11,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [158, 158] total 158 [2021-11-07 07:55:11,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515996627] [2021-11-07 07:55:11,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2021-11-07 07:55:11,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:11,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2021-11-07 07:55:11,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3279, Invalid=21843, Unknown=0, NotChecked=0, Total=25122 [2021-11-07 07:55:11,026 INFO L87 Difference]: Start difference. First operand 479 states and 479 transitions. Second operand has 159 states, 157 states have (on average 2.5031847133757963) internal successors, (393), 81 states have internal predecessors, (393), 78 states have call successors, (78), 78 states have call predecessors, (78), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:16,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:16,356 INFO L93 Difference]: Finished difference Result 487 states and 487 transitions. [2021-11-07 07:55:16,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-11-07 07:55:16,357 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 157 states have (on average 2.5031847133757963) internal successors, (393), 81 states have internal predecessors, (393), 78 states have call successors, (78), 78 states have call predecessors, (78), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 471 [2021-11-07 07:55:16,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:16,359 INFO L225 Difference]: With dead ends: 487 [2021-11-07 07:55:16,359 INFO L226 Difference]: Without dead ends: 486 [2021-11-07 07:55:16,362 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11667 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=8037, Invalid=47895, Unknown=0, NotChecked=0, Total=55932 [2021-11-07 07:55:16,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-11-07 07:55:16,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 485. [2021-11-07 07:55:16,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 403 states have (on average 1.0049627791563276) internal successors, (405), 404 states have internal predecessors, (405), 80 states have call successors, (80), 80 states have call predecessors, (80), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:16,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 485 transitions. [2021-11-07 07:55:16,419 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 485 transitions. Word has length 471 [2021-11-07 07:55:16,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:16,420 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 485 transitions. [2021-11-07 07:55:16,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 157 states have (on average 2.5031847133757963) internal successors, (393), 81 states have internal predecessors, (393), 78 states have call successors, (78), 78 states have call predecessors, (78), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:16,420 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 485 transitions. [2021-11-07 07:55:16,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-11-07 07:55:16,422 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:16,423 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1] [2021-11-07 07:55:16,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:16,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-07 07:55:16,623 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:55:16,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:16,624 INFO L85 PathProgramCache]: Analyzing trace with hash 981399487, now seen corresponding path program 39 times [2021-11-07 07:55:16,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:16,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388672456] [2021-11-07 07:55:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:16,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 0 proven. 9087 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:22,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:22,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388672456] [2021-11-07 07:55:22,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388672456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:22,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483540786] [2021-11-07 07:55:22,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:55:22,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:22,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:22,907 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:22,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-07 07:55:29,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-11-07 07:55:29,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:29,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 160 conjunts are in the unsatisfiable core [2021-11-07 07:55:29,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 0 proven. 9087 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:30,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483540786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:30,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:30,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [160, 160] total 160 [2021-11-07 07:55:30,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255727652] [2021-11-07 07:55:30,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2021-11-07 07:55:30,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:30,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2021-11-07 07:55:30,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3361, Invalid=22399, Unknown=0, NotChecked=0, Total=25760 [2021-11-07 07:55:30,871 INFO L87 Difference]: Start difference. First operand 485 states and 485 transitions. Second operand has 161 states, 159 states have (on average 2.50314465408805) internal successors, (398), 82 states have internal predecessors, (398), 79 states have call successors, (79), 79 states have call predecessors, (79), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:36,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:36,407 INFO L93 Difference]: Finished difference Result 493 states and 493 transitions. [2021-11-07 07:55:36,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-11-07 07:55:36,408 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 159 states have (on average 2.50314465408805) internal successors, (398), 82 states have internal predecessors, (398), 79 states have call successors, (79), 79 states have call predecessors, (79), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 477 [2021-11-07 07:55:36,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:36,411 INFO L225 Difference]: With dead ends: 493 [2021-11-07 07:55:36,412 INFO L226 Difference]: Without dead ends: 492 [2021-11-07 07:55:36,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11974 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=8240, Invalid=49120, Unknown=0, NotChecked=0, Total=57360 [2021-11-07 07:55:36,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-11-07 07:55:36,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 491. [2021-11-07 07:55:36,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 408 states have (on average 1.0049019607843137) internal successors, (410), 409 states have internal predecessors, (410), 81 states have call successors, (81), 81 states have call predecessors, (81), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:36,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 491 transitions. [2021-11-07 07:55:36,491 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 491 transitions. Word has length 477 [2021-11-07 07:55:36,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:36,491 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 491 transitions. [2021-11-07 07:55:36,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 159 states have (on average 2.50314465408805) internal successors, (398), 82 states have internal predecessors, (398), 79 states have call successors, (79), 79 states have call predecessors, (79), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:36,491 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 491 transitions. [2021-11-07 07:55:36,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2021-11-07 07:55:36,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:36,494 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 39, 39, 1, 1, 1, 1, 1] [2021-11-07 07:55:36,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-11-07 07:55:36,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:36,695 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 07:55:36,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:36,695 INFO L85 PathProgramCache]: Analyzing trace with hash 268290575, now seen corresponding path program 39 times [2021-11-07 07:55:36,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:36,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472391385] [2021-11-07 07:55:36,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:36,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9321 backedges. 0 proven. 9321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:44,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:44,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472391385] [2021-11-07 07:55:44,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472391385] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:44,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030652580] [2021-11-07 07:55:44,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:55:44,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:44,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:44,011 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:44,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a521f57-d7e7-4373-a6e2-8e8d00ad52ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-07 07:55:50,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-11-07 07:55:50,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:50,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 162 conjunts are in the unsatisfiable core [2021-11-07 07:55:50,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9321 backedges. 0 proven. 9321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:52,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030652580] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:52,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:52,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [162, 162] total 162 [2021-11-07 07:55:52,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40867743] [2021-11-07 07:55:52,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2021-11-07 07:55:52,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:52,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2021-11-07 07:55:52,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3443, Invalid=22963, Unknown=0, NotChecked=0, Total=26406 [2021-11-07 07:55:52,301 INFO L87 Difference]: Start difference. First operand 491 states and 491 transitions. Second operand has 163 states, 161 states have (on average 2.5031055900621118) internal successors, (403), 83 states have internal predecessors, (403), 80 states have call successors, (80), 80 states have call predecessors, (80), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)