./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/EvenOdd01-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa --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 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:26:03,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:26:03,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:26:03,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:26:03,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:26:03,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:26:03,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:26:03,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:26:03,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:26:03,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:26:03,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:26:03,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:26:03,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:26:03,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:26:03,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:26:03,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:26:03,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:26:03,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:26:03,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:26:03,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:26:03,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:26:03,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:26:03,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:26:03,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:26:03,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:26:03,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:26:03,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:26:03,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:26:03,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:26:03,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:26:03,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:26:03,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:26:03,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:26:03,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:26:03,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:26:03,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:26:03,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:26:03,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:26:03,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:26:03,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:26:03,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:26:03,395 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-12-07 00:26:03,412 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:26:03,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:26:03,412 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:26:03,412 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:26:03,413 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:26:03,413 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:26:03,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:26:03,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:26:03,414 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:26:03,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:26:03,414 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:26:03,414 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-07 00:26:03,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:26:03,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:26:03,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:26:03,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:26:03,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:26:03,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:26:03,415 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-07 00:26:03,415 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:26:03,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:26:03,415 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:26:03,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:26:03,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:26:03,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:26:03,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:26:03,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:26:03,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:26:03,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:26:03,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:26:03,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:26:03,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:26:03,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:26:03,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:26:03,417 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_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc [2021-12-07 00:26:03,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:26:03,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:26:03,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:26:03,611 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:26:03,611 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:26:03,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/recursive/EvenOdd01-1.c [2021-12-07 00:26:03,655 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/data/89e6490db/0af3fba31c97490087c2661503d1b840/FLAGad4f5fc61 [2021-12-07 00:26:04,024 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:26:04,025 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/sv-benchmarks/c/recursive/EvenOdd01-1.c [2021-12-07 00:26:04,030 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/data/89e6490db/0af3fba31c97490087c2661503d1b840/FLAGad4f5fc61 [2021-12-07 00:26:04,041 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/data/89e6490db/0af3fba31c97490087c2661503d1b840 [2021-12-07 00:26:04,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:26:04,044 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:26:04,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:26:04,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:26:04,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:26:04,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:26:04" (1/1) ... [2021-12-07 00:26:04,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@680d8afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:04, skipping insertion in model container [2021-12-07 00:26:04,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:26:04" (1/1) ... [2021-12-07 00:26:04,055 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:26:04,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:26:04,177 WARN L230 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_b085a8ab-a270-4017-8a53-06b3d13f4ddb/sv-benchmarks/c/recursive/EvenOdd01-1.c[975,988] [2021-12-07 00:26:04,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:26:04,186 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:26:04,198 WARN L230 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_b085a8ab-a270-4017-8a53-06b3d13f4ddb/sv-benchmarks/c/recursive/EvenOdd01-1.c[975,988] [2021-12-07 00:26:04,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:26:04,207 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:26:04,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:04 WrapperNode [2021-12-07 00:26:04,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:26:04,209 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:26:04,209 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:26:04,209 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:26:04,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:04" (1/1) ... [2021-12-07 00:26:04,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:04" (1/1) ... [2021-12-07 00:26:04,236 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2021-12-07 00:26:04,237 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:26:04,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:26:04,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:26:04,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:26:04,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:04" (1/1) ... [2021-12-07 00:26:04,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:04" (1/1) ... [2021-12-07 00:26:04,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:04" (1/1) ... [2021-12-07 00:26:04,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:04" (1/1) ... [2021-12-07 00:26:04,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:04" (1/1) ... [2021-12-07 00:26:04,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:04" (1/1) ... [2021-12-07 00:26:04,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:04" (1/1) ... [2021-12-07 00:26:04,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:26:04,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:26:04,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:26:04,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:26:04,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:04" (1/1) ... [2021-12-07 00:26:04,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:26:04,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:26:04,282 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:26:04,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:26:04,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:26:04,318 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2021-12-07 00:26:04,318 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2021-12-07 00:26:04,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:26:04,318 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2021-12-07 00:26:04,318 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2021-12-07 00:26:04,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:26:04,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:26:04,362 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:26:04,363 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:26:04,448 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:26:04,453 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:26:04,453 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-07 00:26:04,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:26:04 BoogieIcfgContainer [2021-12-07 00:26:04,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:26:04,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:26:04,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:26:04,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:26:04,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:26:04" (1/3) ... [2021-12-07 00:26:04,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d3f1dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:26:04, skipping insertion in model container [2021-12-07 00:26:04,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:04" (2/3) ... [2021-12-07 00:26:04,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d3f1dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:26:04, skipping insertion in model container [2021-12-07 00:26:04,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:26:04" (3/3) ... [2021-12-07 00:26:04,460 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2021-12-07 00:26:04,464 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:26:04,465 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-12-07 00:26:04,501 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:26:04,506 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 [2021-12-07 00:26:04,506 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-07 00:26:04,519 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) [2021-12-07 00:26:04,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-07 00:26:04,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:04,523 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:26:04,524 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-07 00:26:04,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:04,528 INFO L85 PathProgramCache]: Analyzing trace with hash -592993799, now seen corresponding path program 1 times [2021-12-07 00:26:04,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:04,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501454094] [2021-12-07 00:26:04,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:04,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:04,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:04,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501454094] [2021-12-07 00:26:04,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501454094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:26:04,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:26:04,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:26:04,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206925928] [2021-12-07 00:26:04,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:26:04,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:26:04,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:04,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:26:04,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:26:04,692 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) [2021-12-07 00:26:04,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:04,754 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-12-07 00:26:04,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:26:04,755 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 [2021-12-07 00:26:04,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:04,761 INFO L225 Difference]: With dead ends: 48 [2021-12-07 00:26:04,761 INFO L226 Difference]: Without dead ends: 27 [2021-12-07 00:26:04,763 INFO L932 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 [2021-12-07 00:26:04,766 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:26:04,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 101 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:26:04,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-07 00:26:04,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-12-07 00:26:04,790 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) [2021-12-07 00:26:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-12-07 00:26:04,791 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 8 [2021-12-07 00:26:04,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:04,792 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-12-07 00:26:04,792 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) [2021-12-07 00:26:04,792 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-12-07 00:26:04,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-07 00:26:04,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:04,793 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:26:04,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:26:04,793 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-07 00:26:04,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:04,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1202938527, now seen corresponding path program 1 times [2021-12-07 00:26:04,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:04,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301895207] [2021-12-07 00:26:04,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:04,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:04,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:04,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301895207] [2021-12-07 00:26:04,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301895207] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:26:04,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:26:04,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:26:04,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048083474] [2021-12-07 00:26:04,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:26:04,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:26:04,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:04,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:26:04,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:26:04,828 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) [2021-12-07 00:26:04,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:04,857 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-12-07 00:26:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:26:04,858 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 [2021-12-07 00:26:04,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:04,858 INFO L225 Difference]: With dead ends: 27 [2021-12-07 00:26:04,858 INFO L226 Difference]: Without dead ends: 26 [2021-12-07 00:26:04,859 INFO L932 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 [2021-12-07 00:26:04,860 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:26:04,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 58 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:26:04,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-07 00:26:04,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-12-07 00:26:04,864 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) [2021-12-07 00:26:04,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-12-07 00:26:04,864 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 9 [2021-12-07 00:26:04,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:04,865 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-12-07 00:26:04,865 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) [2021-12-07 00:26:04,865 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-12-07 00:26:04,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-07 00:26:04,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:04,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:26:04,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:26:04,866 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-07 00:26:04,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:04,867 INFO L85 PathProgramCache]: Analyzing trace with hash 708932889, now seen corresponding path program 1 times [2021-12-07 00:26:04,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:04,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871831634] [2021-12-07 00:26:04,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:04,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:04,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:04,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:04,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871831634] [2021-12-07 00:26:04,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871831634] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:26:04,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:26:04,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 00:26:04,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110624604] [2021-12-07 00:26:04,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:26:04,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:26:04,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:04,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:26:04,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:26:04,916 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) [2021-12-07 00:26:04,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:04,954 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-12-07 00:26:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:26:04,955 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 [2021-12-07 00:26:04,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:04,956 INFO L225 Difference]: With dead ends: 25 [2021-12-07 00:26:04,956 INFO L226 Difference]: Without dead ends: 23 [2021-12-07 00:26:04,956 INFO L932 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 [2021-12-07 00:26:04,957 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:26:04,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:26:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-07 00:26:04,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-07 00:26:04,961 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) [2021-12-07 00:26:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-12-07 00:26:04,961 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 14 [2021-12-07 00:26:04,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:04,962 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-12-07 00:26:04,962 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) [2021-12-07 00:26:04,962 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-12-07 00:26:04,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-07 00:26:04,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:04,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:26:04,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 00:26:04,963 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-07 00:26:04,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:04,963 INFO L85 PathProgramCache]: Analyzing trace with hash 502083121, now seen corresponding path program 1 times [2021-12-07 00:26:04,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:04,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683336167] [2021-12-07 00:26:04,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:04,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:05,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:05,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683336167] [2021-12-07 00:26:05,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683336167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:26:05,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:26:05,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 00:26:05,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170264955] [2021-12-07 00:26:05,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:26:05,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:26:05,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:05,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:26:05,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:26:05,008 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) [2021-12-07 00:26:05,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:05,054 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-12-07 00:26:05,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:26:05,055 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 [2021-12-07 00:26:05,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:05,055 INFO L225 Difference]: With dead ends: 31 [2021-12-07 00:26:05,056 INFO L226 Difference]: Without dead ends: 30 [2021-12-07 00:26:05,056 INFO L932 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 [2021-12-07 00:26:05,058 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:26:05,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:26:05,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-07 00:26:05,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-12-07 00:26:05,064 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) [2021-12-07 00:26:05,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-12-07 00:26:05,065 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 15 [2021-12-07 00:26:05,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:05,065 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-12-07 00:26:05,065 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) [2021-12-07 00:26:05,065 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-12-07 00:26:05,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-07 00:26:05,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:05,066 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:26:05,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 00:26:05,067 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-07 00:26:05,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:05,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1165045203, now seen corresponding path program 1 times [2021-12-07 00:26:05,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:05,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584250862] [2021-12-07 00:26:05,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:05,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:05,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:05,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:05,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584250862] [2021-12-07 00:26:05,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584250862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:26:05,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590682626] [2021-12-07 00:26:05,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:05,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:05,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:26:05,142 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:26:05,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:26:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:05,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 00:26:05,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:26:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:05,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:26:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:05,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590682626] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:26:05,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:26:05,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-12-07 00:26:05,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213083804] [2021-12-07 00:26:05,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:26:05,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-07 00:26:05,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:05,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-07 00:26:05,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-12-07 00:26:05,343 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 16 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 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) [2021-12-07 00:26:05,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:05,437 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-12-07 00:26:05,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 00:26:05,437 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 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 21 [2021-12-07 00:26:05,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:05,438 INFO L225 Difference]: With dead ends: 50 [2021-12-07 00:26:05,438 INFO L226 Difference]: Without dead ends: 48 [2021-12-07 00:26:05,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-12-07 00:26:05,440 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 43 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:26:05,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 75 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:26:05,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-07 00:26:05,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-12-07 00:26:05,448 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) [2021-12-07 00:26:05,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-12-07 00:26:05,450 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 21 [2021-12-07 00:26:05,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:05,450 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-12-07 00:26:05,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 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) [2021-12-07 00:26:05,451 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-12-07 00:26:05,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-07 00:26:05,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:05,452 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2021-12-07 00:26:05,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:26:05,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:05,654 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-07 00:26:05,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:05,656 INFO L85 PathProgramCache]: Analyzing trace with hash -924042987, now seen corresponding path program 1 times [2021-12-07 00:26:05,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:05,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300044144] [2021-12-07 00:26:05,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:05,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:05,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:05,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300044144] [2021-12-07 00:26:05,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300044144] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:26:05,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964948745] [2021-12-07 00:26:05,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:05,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:05,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:26:05,901 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:26:05,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:26:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:05,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-07 00:26:05,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:26:05,997 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:05,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:26:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:06,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964948745] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:26:06,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:26:06,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2021-12-07 00:26:06,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404338283] [2021-12-07 00:26:06,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:26:06,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-07 00:26:06,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:06,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-07 00:26:06,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-12-07 00:26:06,152 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 28 states, 25 states have (on average 2.56) internal successors, (64), 16 states have internal predecessors, (64), 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) [2021-12-07 00:26:06,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:06,352 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2021-12-07 00:26:06,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-07 00:26:06,352 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.56) internal successors, (64), 16 states have internal predecessors, (64), 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 39 [2021-12-07 00:26:06,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:06,353 INFO L225 Difference]: With dead ends: 92 [2021-12-07 00:26:06,354 INFO L226 Difference]: Without dead ends: 90 [2021-12-07 00:26:06,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2021-12-07 00:26:06,355 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 121 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:26:06,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 107 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:26:06,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-07 00:26:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-12-07 00:26:06,363 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) [2021-12-07 00:26:06,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-12-07 00:26:06,365 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 39 [2021-12-07 00:26:06,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:06,365 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-12-07 00:26:06,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.56) internal successors, (64), 16 states have internal predecessors, (64), 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) [2021-12-07 00:26:06,365 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-12-07 00:26:06,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-07 00:26:06,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:06,368 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2021-12-07 00:26:06,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:26:06,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-07 00:26:06,570 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-07 00:26:06,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:06,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1136694515, now seen corresponding path program 2 times [2021-12-07 00:26:06,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:06,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196316653] [2021-12-07 00:26:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:06,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:06,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:06,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196316653] [2021-12-07 00:26:06,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196316653] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:26:06,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518530043] [2021-12-07 00:26:06,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:26:06,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:06,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:26:06,928 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:26:06,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:26:06,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:26:06,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:26:06,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 00:26:06,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:26:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:07,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:26:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:07,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518530043] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:26:07,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:26:07,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2021-12-07 00:26:07,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105090005] [2021-12-07 00:26:07,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:26:07,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-07 00:26:07,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:07,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-07 00:26:07,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2656, Unknown=0, NotChecked=0, Total=3080 [2021-12-07 00:26:07,501 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 56 states, 53 states have (on average 2.5283018867924527) internal successors, (134), 30 states have internal predecessors, (134), 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) [2021-12-07 00:26:07,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:07,933 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2021-12-07 00:26:07,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-07 00:26:07,933 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 2.5283018867924527) internal successors, (134), 30 states have internal predecessors, (134), 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 81 [2021-12-07 00:26:07,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:07,934 INFO L225 Difference]: With dead ends: 170 [2021-12-07 00:26:07,934 INFO L226 Difference]: Without dead ends: 168 [2021-12-07 00:26:07,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=970, Invalid=5510, Unknown=0, NotChecked=0, Total=6480 [2021-12-07 00:26:07,937 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 313 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:26:07,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 102 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:26:07,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-07 00:26:07,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2021-12-07 00:26:07,948 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) [2021-12-07 00:26:07,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2021-12-07 00:26:07,950 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 81 [2021-12-07 00:26:07,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:07,950 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2021-12-07 00:26:07,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 2.5283018867924527) internal successors, (134), 30 states have internal predecessors, (134), 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) [2021-12-07 00:26:07,950 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2021-12-07 00:26:07,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-07 00:26:07,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:07,953 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2021-12-07 00:26:07,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:26:08,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:08,155 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-07 00:26:08,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:08,156 INFO L85 PathProgramCache]: Analyzing trace with hash -40232055, now seen corresponding path program 2 times [2021-12-07 00:26:08,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:08,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351204719] [2021-12-07 00:26:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:08,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:08,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:08,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351204719] [2021-12-07 00:26:08,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351204719] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:26:08,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848563101] [2021-12-07 00:26:08,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:26:08,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:08,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:26:08,855 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:26:08,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:26:08,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:26:08,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:26:08,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-07 00:26:08,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:26:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:09,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:26:10,274 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:10,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848563101] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:26:10,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:26:10,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2021-12-07 00:26:10,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140473989] [2021-12-07 00:26:10,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:26:10,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-12-07 00:26:10,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:10,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-12-07 00:26:10,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=10042, Unknown=0, NotChecked=0, Total=11556 [2021-12-07 00:26:10,280 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand has 108 states, 105 states have (on average 2.5142857142857142) internal successors, (264), 56 states have internal predecessors, (264), 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) [2021-12-07 00:26:11,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:11,362 INFO L93 Difference]: Finished difference Result 332 states and 357 transitions. [2021-12-07 00:26:11,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-12-07 00:26:11,363 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 105 states have (on average 2.5142857142857142) internal successors, (264), 56 states have internal predecessors, (264), 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 159 [2021-12-07 00:26:11,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:11,365 INFO L225 Difference]: With dead ends: 332 [2021-12-07 00:26:11,365 INFO L226 Difference]: Without dead ends: 330 [2021-12-07 00:26:11,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7600 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3672, Invalid=21768, Unknown=0, NotChecked=0, Total=25440 [2021-12-07 00:26:11,372 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 771 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:26:11,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 130 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:26:11,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-12-07 00:26:11,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 329. [2021-12-07 00:26:11,388 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) [2021-12-07 00:26:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 329 transitions. [2021-12-07 00:26:11,391 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 329 transitions. Word has length 159 [2021-12-07 00:26:11,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:11,392 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 329 transitions. [2021-12-07 00:26:11,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 105 states have (on average 2.5142857142857142) internal successors, (264), 56 states have internal predecessors, (264), 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) [2021-12-07 00:26:11,392 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 329 transitions. [2021-12-07 00:26:11,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-12-07 00:26:11,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:11,398 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1] [2021-12-07 00:26:11,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:26:11,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:11,600 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-07 00:26:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:11,602 INFO L85 PathProgramCache]: Analyzing trace with hash 339345909, now seen corresponding path program 3 times [2021-12-07 00:26:11,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:11,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907173990] [2021-12-07 00:26:11,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:11,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:13,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:13,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907173990] [2021-12-07 00:26:13,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907173990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:26:13,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530597600] [2021-12-07 00:26:13,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:26:13,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:13,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:26:13,464 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:26:13,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:26:13,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-12-07 00:26:13,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:26:13,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-07 00:26:13,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:26:13,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:13,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:26:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:17,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530597600] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:26:17,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:26:17,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 215 [2021-12-07 00:26:17,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150524312] [2021-12-07 00:26:17,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:26:17,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 216 states [2021-12-07 00:26:17,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:17,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2021-12-07 00:26:17,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5944, Invalid=40496, Unknown=0, NotChecked=0, Total=46440 [2021-12-07 00:26:17,684 INFO L87 Difference]: Start difference. First operand 329 states and 329 transitions. Second operand has 216 states, 213 states have (on average 2.507042253521127) internal successors, (534), 110 states have internal predecessors, (534), 106 states have call successors, (106), 106 states have call predecessors, (106), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:21,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:21,760 INFO L93 Difference]: Finished difference Result 650 states and 701 transitions. [2021-12-07 00:26:21,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2021-12-07 00:26:21,761 INFO L78 Accepts]: Start accepts. Automaton has has 216 states, 213 states have (on average 2.507042253521127) internal successors, (534), 110 states have internal predecessors, (534), 106 states have call successors, (106), 106 states have call predecessors, (106), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2021-12-07 00:26:21,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:21,764 INFO L225 Difference]: With dead ends: 650 [2021-12-07 00:26:21,764 INFO L226 Difference]: Without dead ends: 648 [2021-12-07 00:26:21,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32497 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=14530, Invalid=88190, Unknown=0, NotChecked=0, Total=102720 [2021-12-07 00:26:21,771 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1863 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1863 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:26:21,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1863 Valid, 157 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:26:21,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-12-07 00:26:21,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 647. [2021-12-07 00:26:21,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 538 states have (on average 1.003717472118959) internal successors, (540), 539 states have internal predecessors, (540), 107 states have call successors, (107), 107 states have call predecessors, (107), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 647 transitions. [2021-12-07 00:26:21,799 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 647 transitions. Word has length 321 [2021-12-07 00:26:21,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:21,800 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 647 transitions. [2021-12-07 00:26:21,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 216 states, 213 states have (on average 2.507042253521127) internal successors, (534), 110 states have internal predecessors, (534), 106 states have call successors, (106), 106 states have call predecessors, (106), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:21,801 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 647 transitions. [2021-12-07 00:26:21,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2021-12-07 00:26:21,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:21,818 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 52, 52, 1, 1, 1, 1, 1] [2021-12-07 00:26:21,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 00:26:22,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-07 00:26:22,020 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-07 00:26:22,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:22,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1573793113, now seen corresponding path program 3 times [2021-12-07 00:26:22,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:22,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913991273] [2021-12-07 00:26:22,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:22,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16484 backedges. 0 proven. 16484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:28,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:28,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913991273] [2021-12-07 00:26:28,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913991273] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:26:28,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749092337] [2021-12-07 00:26:28,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:26:28,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:28,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:26:28,080 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:26:28,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:26:28,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2021-12-07 00:26:28,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:26:28,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 214 conjunts are in the unsatisfiable core [2021-12-07 00:26:28,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:26:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16484 backedges. 0 proven. 16484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:28,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:26:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16484 backedges. 0 proven. 16484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:42,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749092337] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:26:42,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:26:42,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 214, 214] total 427 [2021-12-07 00:26:42,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499112437] [2021-12-07 00:26:42,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:26:42,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 428 states [2021-12-07 00:26:42,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:42,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 428 interpolants. [2021-12-07 00:26:42,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23114, Invalid=159642, Unknown=0, NotChecked=0, Total=182756 [2021-12-07 00:26:42,722 INFO L87 Difference]: Start difference. First operand 647 states and 647 transitions. Second operand has 428 states, 425 states have (on average 2.503529411764706) internal successors, (1064), 216 states have internal predecessors, (1064), 212 states have call successors, (212), 212 states have call predecessors, (212), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:27:00,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:27:00,659 INFO L93 Difference]: Finished difference Result 1292 states and 1397 transitions. [2021-12-07 00:27:00,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 428 states. [2021-12-07 00:27:00,660 INFO L78 Accepts]: Start accepts. Automaton has has 428 states, 425 states have (on average 2.503529411764706) internal successors, (1064), 216 states have internal predecessors, (1064), 212 states have call successors, (212), 212 states have call predecessors, (212), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 639 [2021-12-07 00:27:00,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:27:00,666 INFO L225 Difference]: With dead ends: 1292 [2021-12-07 00:27:00,666 INFO L226 Difference]: Without dead ends: 1290 [2021-12-07 00:27:00,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1702 GetRequests, 1064 SyntacticMatches, 0 SemanticMatches, 638 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132720 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=57352, Invalid=351608, Unknown=0, NotChecked=0, Total=408960 [2021-12-07 00:27:00,687 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 5124 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 2462 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5124 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:27:00,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5124 Valid, 158 Invalid, 2575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2462 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-07 00:27:00,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2021-12-07 00:27:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1289. [2021-12-07 00:27:00,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1073 states have (on average 1.0018639328984156) internal successors, (1075), 1074 states have internal predecessors, (1075), 214 states have call successors, (214), 214 states have call predecessors, (214), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:27:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 1289 transitions. [2021-12-07 00:27:00,727 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 1289 transitions. Word has length 639 [2021-12-07 00:27:00,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:27:00,728 INFO L470 AbstractCegarLoop]: Abstraction has 1289 states and 1289 transitions. [2021-12-07 00:27:00,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 428 states, 425 states have (on average 2.503529411764706) internal successors, (1064), 216 states have internal predecessors, (1064), 212 states have call successors, (212), 212 states have call predecessors, (212), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:27:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 1289 transitions. [2021-12-07 00:27:00,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1282 [2021-12-07 00:27:00,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:27:00,739 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 106, 106, 106, 106, 106, 106, 106, 106, 1, 1, 1, 1, 1] [2021-12-07 00:27:00,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-07 00:27:00,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:27:00,941 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-07 00:27:00,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:27:00,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1783726699, now seen corresponding path program 4 times [2021-12-07 00:27:00,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:27:00,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269521650] [2021-12-07 00:27:00,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:27:00,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:27:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:27:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 67310 backedges. 0 proven. 67310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:27:24,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:27:24,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269521650] [2021-12-07 00:27:24,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269521650] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:27:24,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059061782] [2021-12-07 00:27:24,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:27:24,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:27:24,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:27:24,907 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:27:24,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:27:25,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:27:25,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:27:25,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 2158 conjuncts, 428 conjunts are in the unsatisfiable core [2021-12-07 00:27:25,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:27:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 67310 backedges. 0 proven. 67310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:27:26,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:28:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 67310 backedges. 0 proven. 67310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:28:23,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059061782] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:28:23,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:28:23,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [428, 428, 428] total 855 [2021-12-07 00:28:23,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095338276] [2021-12-07 00:28:23,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:28:23,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 856 states [2021-12-07 00:28:23,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:28:23,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 856 interpolants. [2021-12-07 00:28:23,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92024, Invalid=639856, Unknown=0, NotChecked=0, Total=731880 [2021-12-07 00:28:23,430 INFO L87 Difference]: Start difference. First operand 1289 states and 1289 transitions. Second operand has 856 states, 853 states have (on average 2.5017584994138335) internal successors, (2134), 430 states have internal predecessors, (2134), 426 states have call successors, (426), 426 states have call predecessors, (426), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:30:13,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:30:13,245 INFO L93 Difference]: Finished difference Result 2570 states and 2781 transitions. [2021-12-07 00:30:13,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 854 states. [2021-12-07 00:30:13,247 INFO L78 Accepts]: Start accepts. Automaton has has 856 states, 853 states have (on average 2.5017584994138335) internal successors, (2134), 430 states have internal predecessors, (2134), 426 states have call successors, (426), 426 states have call predecessors, (426), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1281 [2021-12-07 00:30:13,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:30:13,257 INFO L225 Difference]: With dead ends: 2570 [2021-12-07 00:30:13,257 INFO L226 Difference]: Without dead ends: 2568 [2021-12-07 00:30:13,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3413 GetRequests, 2134 SyntacticMatches, 0 SemanticMatches, 1279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539537 ImplicationChecksByTransitivity, 125.6s TimeCoverageRelationStatistics Valid=228770, Invalid=1410910, Unknown=0, NotChecked=0, Total=1639680 [2021-12-07 00:30:13,346 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 9935 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 4838 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9935 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 5055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 4838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:30:13,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9935 Valid, 201 Invalid, 5055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 4838 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-07 00:30:13,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-12-07 00:30:13,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2567. [2021-12-07 00:30:13,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2567 states, 2138 states have (on average 1.000935453695042) internal successors, (2140), 2139 states have internal predecessors, (2140), 427 states have call successors, (427), 427 states have call predecessors, (427), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:30:13,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2567 states to 2567 states and 2567 transitions. [2021-12-07 00:30:13,417 INFO L78 Accepts]: Start accepts. Automaton has 2567 states and 2567 transitions. Word has length 1281 [2021-12-07 00:30:13,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:30:13,419 INFO L470 AbstractCegarLoop]: Abstraction has 2567 states and 2567 transitions. [2021-12-07 00:30:13,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 856 states, 853 states have (on average 2.5017584994138335) internal successors, (2134), 430 states have internal predecessors, (2134), 426 states have call successors, (426), 426 states have call predecessors, (426), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:30:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2567 states and 2567 transitions. [2021-12-07 00:30:13,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2560 [2021-12-07 00:30:13,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:30:13,454 INFO L514 BasicCegarLoop]: trace histogram [213, 213, 213, 213, 213, 213, 213, 213, 213, 213, 212, 212, 1, 1, 1, 1, 1] [2021-12-07 00:30:13,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:30:13,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:30:13,655 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-07 00:30:13,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:30:13,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1374090393, now seen corresponding path program 4 times [2021-12-07 00:30:13,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:30:13,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997686971] [2021-12-07 00:30:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:30:13,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:30:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:31:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 270724 backedges. 0 proven. 270724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:31:48,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:31:48,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997686971] [2021-12-07 00:31:48,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997686971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:31:48,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274570862] [2021-12-07 00:31:48,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:31:48,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:31:48,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:31:48,811 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:31:48,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b085a8ab-a270-4017-8a53-06b3d13f4ddb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:31:51,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:31:51,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:31:51,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 4288 conjuncts, 854 conjunts are in the unsatisfiable core [2021-12-07 00:31:51,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:31:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 270724 backedges. 0 proven. 270724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:31:54,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:35:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 270724 backedges. 0 proven. 270724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:35:36,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274570862] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:35:36,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:35:36,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [854, 854, 854] total 1707 [2021-12-07 00:35:36,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014824609] [2021-12-07 00:35:36,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:35:36,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 1708 states [2021-12-07 00:35:36,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:35:36,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1708 interpolants. [2021-12-07 00:35:36,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365514, Invalid=2550042, Unknown=0, NotChecked=0, Total=2915556 [2021-12-07 00:35:36,605 INFO L87 Difference]: Start difference. First operand 2567 states and 2567 transitions. Second operand has 1708 states, 1705 states have (on average 2.5008797653958945) internal successors, (4264), 856 states have internal predecessors, (4264), 852 states have call successors, (852), 852 states have call predecessors, (852), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)