./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 64bit --witnessprinter.graph.data.programhash 14df269faa4a77275028af94d8141ab36c184cf5 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 20:22:41,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 20:22:41,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 20:22:41,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 20:22:41,406 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 20:22:41,407 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 20:22:41,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 20:22:41,411 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 20:22:41,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 20:22:41,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 20:22:41,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 20:22:41,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 20:22:41,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 20:22:41,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 20:22:41,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 20:22:41,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 20:22:41,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 20:22:41,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 20:22:41,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 20:22:41,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 20:22:41,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 20:22:41,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 20:22:41,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 20:22:41,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 20:22:41,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 20:22:41,439 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 20:22:41,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 20:22:41,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 20:22:41,440 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 20:22:41,441 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 20:22:41,441 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 20:22:41,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 20:22:41,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 20:22:41,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 20:22:41,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 20:22:41,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 20:22:41,449 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 20:22:41,449 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 20:22:41,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 20:22:41,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 20:22:41,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 20:22:41,452 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2019-11-28 20:22:41,481 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 20:22:41,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 20:22:41,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 20:22:41,485 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 20:22:41,485 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 20:22:41,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 20:22:41,485 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 20:22:41,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 20:22:41,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 20:22:41,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 20:22:41,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 20:22:41,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 20:22:41,488 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-28 20:22:41,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 20:22:41,488 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 20:22:41,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 20:22:41,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 20:22:41,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 20:22:41,489 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 20:22:41,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 20:22:41,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 20:22:41,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 20:22:41,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 20:22:41,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 20:22:41,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 20:22:41,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 20:22:41,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 20:22:41,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 20:22:41,492 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14df269faa4a77275028af94d8141ab36c184cf5 [2019-11-28 20:22:41,787 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 20:22:41,801 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 20:22:41,805 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 20:22:41,807 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 20:22:41,807 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 20:22:41,808 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c [2019-11-28 20:22:41,882 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d54db9c8c/c4ef8319340c46da871842e158bd8e92/FLAG4b5695707 [2019-11-28 20:22:42,333 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 20:22:42,336 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c [2019-11-28 20:22:42,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d54db9c8c/c4ef8319340c46da871842e158bd8e92/FLAG4b5695707 [2019-11-28 20:22:42,690 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d54db9c8c/c4ef8319340c46da871842e158bd8e92 [2019-11-28 20:22:42,694 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 20:22:42,696 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 20:22:42,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 20:22:42,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 20:22:42,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 20:22:42,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:22:42" (1/1) ... [2019-11-28 20:22:42,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a115a4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:42, skipping insertion in model container [2019-11-28 20:22:42,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:22:42" (1/1) ... [2019-11-28 20:22:42,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 20:22:42,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 20:22:42,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:22:42,915 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 20:22:42,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:22:42,940 INFO L208 MainTranslator]: Completed translation [2019-11-28 20:22:42,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:42 WrapperNode [2019-11-28 20:22:42,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 20:22:42,942 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 20:22:42,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 20:22:42,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 20:22:42,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:42" (1/1) ... [2019-11-28 20:22:42,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:42" (1/1) ... [2019-11-28 20:22:42,971 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 20:22:42,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 20:22:42,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 20:22:42,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 20:22:43,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:42" (1/1) ... [2019-11-28 20:22:43,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:42" (1/1) ... [2019-11-28 20:22:43,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:42" (1/1) ... [2019-11-28 20:22:43,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:42" (1/1) ... [2019-11-28 20:22:43,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:42" (1/1) ... [2019-11-28 20:22:43,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:42" (1/1) ... [2019-11-28 20:22:43,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:42" (1/1) ... [2019-11-28 20:22:43,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 20:22:43,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 20:22:43,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 20:22:43,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 20:22:43,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 20:22:43,105 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-11-28 20:22:43,106 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2019-11-28 20:22:43,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 20:22:43,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 20:22:43,295 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 20:22:43,295 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 20:22:43,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:22:43 BoogieIcfgContainer [2019-11-28 20:22:43,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 20:22:43,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 20:22:43,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 20:22:43,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 20:22:43,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:22:42" (1/3) ... [2019-11-28 20:22:43,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7675c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:22:43, skipping insertion in model container [2019-11-28 20:22:43,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:42" (2/3) ... [2019-11-28 20:22:43,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7675c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:22:43, skipping insertion in model container [2019-11-28 20:22:43,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:22:43" (3/3) ... [2019-11-28 20:22:43,317 INFO L109 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2c.c [2019-11-28 20:22:43,337 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 20:22:43,347 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-11-28 20:22:43,384 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-11-28 20:22:43,422 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 20:22:43,426 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 20:22:43,426 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 20:22:43,426 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 20:22:43,426 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 20:22:43,426 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 20:22:43,427 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 20:22:43,427 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 20:22:43,450 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-28 20:22:43,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-28 20:22:43,455 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:43,455 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-28 20:22:43,456 INFO L410 AbstractCegarLoop]: === Iteration 1 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:43,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:43,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1454635077, now seen corresponding path program 1 times [2019-11-28 20:22:43,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:43,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191129167] [2019-11-28 20:22:43,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:22:43,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191129167] [2019-11-28 20:22:43,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:22:43,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 20:22:43,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602276611] [2019-11-28 20:22:43,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 20:22:43,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:43,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 20:22:43,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 20:22:43,659 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2019-11-28 20:22:43,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:43,865 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2019-11-28 20:22:43,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 20:22:43,868 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-28 20:22:43,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:43,885 INFO L225 Difference]: With dead ends: 41 [2019-11-28 20:22:43,886 INFO L226 Difference]: Without dead ends: 36 [2019-11-28 20:22:43,892 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 20:22:43,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-28 20:22:43,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-11-28 20:22:43,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-28 20:22:43,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-11-28 20:22:43,947 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 6 [2019-11-28 20:22:43,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:43,947 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-11-28 20:22:43,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 20:22:43,948 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-11-28 20:22:43,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-28 20:22:43,948 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:43,949 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:22:43,949 INFO L410 AbstractCegarLoop]: === Iteration 2 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:43,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:43,950 INFO L82 PathProgramCache]: Analyzing trace with hash 2144014465, now seen corresponding path program 1 times [2019-11-28 20:22:43,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:43,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808665477] [2019-11-28 20:22:43,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:22:44,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808665477] [2019-11-28 20:22:44,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:22:44,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 20:22:44,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833366936] [2019-11-28 20:22:44,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 20:22:44,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:44,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 20:22:44,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 20:22:44,005 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 5 states. [2019-11-28 20:22:44,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:44,069 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2019-11-28 20:22:44,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 20:22:44,070 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-11-28 20:22:44,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:44,071 INFO L225 Difference]: With dead ends: 50 [2019-11-28 20:22:44,071 INFO L226 Difference]: Without dead ends: 46 [2019-11-28 20:22:44,073 INFO L630 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 [2019-11-28 20:22:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-28 20:22:44,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2019-11-28 20:22:44,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-28 20:22:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-11-28 20:22:44,088 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 7 [2019-11-28 20:22:44,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:44,089 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-11-28 20:22:44,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 20:22:44,089 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-11-28 20:22:44,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-28 20:22:44,091 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:44,091 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 20:22:44,091 INFO L410 AbstractCegarLoop]: === Iteration 3 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:44,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:44,092 INFO L82 PathProgramCache]: Analyzing trace with hash -736378463, now seen corresponding path program 1 times [2019-11-28 20:22:44,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:44,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786386386] [2019-11-28 20:22:44,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:22:44,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786386386] [2019-11-28 20:22:44,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34171355] [2019-11-28 20:22:44,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:44,238 INFO L264 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 20:22:44,244 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:22:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:22:44,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:22:44,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-28 20:22:44,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181187342] [2019-11-28 20:22:44,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 20:22:44,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:44,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 20:22:44,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-28 20:22:44,309 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 7 states. [2019-11-28 20:22:44,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:44,462 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2019-11-28 20:22:44,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 20:22:44,463 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-11-28 20:22:44,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:44,465 INFO L225 Difference]: With dead ends: 63 [2019-11-28 20:22:44,465 INFO L226 Difference]: Without dead ends: 62 [2019-11-28 20:22:44,466 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-28 20:22:44,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-28 20:22:44,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2019-11-28 20:22:44,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-28 20:22:44,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2019-11-28 20:22:44,480 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 12 [2019-11-28 20:22:44,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:44,481 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2019-11-28 20:22:44,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 20:22:44,481 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2019-11-28 20:22:44,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-28 20:22:44,482 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:44,482 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:22:44,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:44,686 INFO L410 AbstractCegarLoop]: === Iteration 4 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:44,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:44,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1009328462, now seen corresponding path program 1 times [2019-11-28 20:22:44,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:44,687 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483205673] [2019-11-28 20:22:44,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 20:22:44,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483205673] [2019-11-28 20:22:44,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:22:44,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 20:22:44,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460555722] [2019-11-28 20:22:44,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 20:22:44,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:44,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 20:22:44,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 20:22:44,741 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 3 states. [2019-11-28 20:22:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:44,769 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2019-11-28 20:22:44,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 20:22:44,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-28 20:22:44,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:44,772 INFO L225 Difference]: With dead ends: 52 [2019-11-28 20:22:44,772 INFO L226 Difference]: Without dead ends: 51 [2019-11-28 20:22:44,773 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 20:22:44,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-28 20:22:44,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-11-28 20:22:44,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-28 20:22:44,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2019-11-28 20:22:44,784 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 14 [2019-11-28 20:22:44,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:44,785 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2019-11-28 20:22:44,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 20:22:44,785 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2019-11-28 20:22:44,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 20:22:44,786 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:44,786 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:22:44,787 INFO L410 AbstractCegarLoop]: === Iteration 5 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:44,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:44,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1224411294, now seen corresponding path program 1 times [2019-11-28 20:22:44,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:44,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129421943] [2019-11-28 20:22:44,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 20:22:44,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129421943] [2019-11-28 20:22:44,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:22:44,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 20:22:44,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973421124] [2019-11-28 20:22:44,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 20:22:44,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:44,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 20:22:44,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 20:22:44,832 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 4 states. [2019-11-28 20:22:44,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:44,869 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2019-11-28 20:22:44,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 20:22:44,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-28 20:22:44,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:44,872 INFO L225 Difference]: With dead ends: 77 [2019-11-28 20:22:44,872 INFO L226 Difference]: Without dead ends: 76 [2019-11-28 20:22:44,873 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 20:22:44,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-28 20:22:44,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2019-11-28 20:22:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-28 20:22:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2019-11-28 20:22:44,894 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 15 [2019-11-28 20:22:44,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:44,895 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2019-11-28 20:22:44,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 20:22:44,895 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2019-11-28 20:22:44,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-28 20:22:44,896 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:44,896 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2019-11-28 20:22:44,897 INFO L410 AbstractCegarLoop]: === Iteration 6 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:44,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:44,898 INFO L82 PathProgramCache]: Analyzing trace with hash -231947135, now seen corresponding path program 2 times [2019-11-28 20:22:44,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:44,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514938367] [2019-11-28 20:22:44,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:22:44,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514938367] [2019-11-28 20:22:44,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812944754] [2019-11-28 20:22:45,000 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-28 20:22:45,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 20:22:45,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 20:22:45,040 INFO L264 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 20:22:45,042 INFO L287 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:45,059 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:22:45,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:22:45,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-28 20:22:45,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966942985] [2019-11-28 20:22:45,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 20:22:45,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:45,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 20:22:45,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-28 20:22:45,065 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand 9 states. [2019-11-28 20:22:45,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:45,256 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2019-11-28 20:22:45,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-28 20:22:45,258 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-11-28 20:22:45,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:45,260 INFO L225 Difference]: With dead ends: 90 [2019-11-28 20:22:45,261 INFO L226 Difference]: Without dead ends: 89 [2019-11-28 20:22:45,265 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-11-28 20:22:45,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-28 20:22:45,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2019-11-28 20:22:45,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-28 20:22:45,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2019-11-28 20:22:45,299 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 17 [2019-11-28 20:22:45,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:45,300 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2019-11-28 20:22:45,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 20:22:45,303 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2019-11-28 20:22:45,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-28 20:22:45,304 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:45,304 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:22:45,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:45,506 INFO L410 AbstractCegarLoop]: === Iteration 7 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:45,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:45,507 INFO L82 PathProgramCache]: Analyzing trace with hash -855233152, now seen corresponding path program 1 times [2019-11-28 20:22:45,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:45,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457280565] [2019-11-28 20:22:45,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 20:22:45,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457280565] [2019-11-28 20:22:45,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:22:45,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 20:22:45,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549716226] [2019-11-28 20:22:45,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 20:22:45,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:45,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 20:22:45,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-28 20:22:45,594 INFO L87 Difference]: Start difference. First operand 86 states and 105 transitions. Second operand 6 states. [2019-11-28 20:22:45,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:45,739 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2019-11-28 20:22:45,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 20:22:45,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-28 20:22:45,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:45,741 INFO L225 Difference]: With dead ends: 117 [2019-11-28 20:22:45,742 INFO L226 Difference]: Without dead ends: 116 [2019-11-28 20:22:45,742 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-28 20:22:45,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-28 20:22:45,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2019-11-28 20:22:45,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-28 20:22:45,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2019-11-28 20:22:45,763 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 19 [2019-11-28 20:22:45,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:45,763 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2019-11-28 20:22:45,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 20:22:45,764 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2019-11-28 20:22:45,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-28 20:22:45,765 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:45,765 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:22:45,766 INFO L410 AbstractCegarLoop]: === Iteration 8 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:45,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:45,766 INFO L82 PathProgramCache]: Analyzing trace with hash -742423898, now seen corresponding path program 1 times [2019-11-28 20:22:45,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:45,767 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488440100] [2019-11-28 20:22:45,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 20:22:45,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488440100] [2019-11-28 20:22:45,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:22:45,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 20:22:45,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294855013] [2019-11-28 20:22:45,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 20:22:45,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:45,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 20:22:45,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-28 20:22:45,826 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand 6 states. [2019-11-28 20:22:45,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:45,974 INFO L93 Difference]: Finished difference Result 135 states and 174 transitions. [2019-11-28 20:22:45,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 20:22:45,975 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-11-28 20:22:45,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:45,977 INFO L225 Difference]: With dead ends: 135 [2019-11-28 20:22:45,977 INFO L226 Difference]: Without dead ends: 134 [2019-11-28 20:22:45,978 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-28 20:22:45,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-28 20:22:45,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 125. [2019-11-28 20:22:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-28 20:22:45,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 160 transitions. [2019-11-28 20:22:45,997 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 160 transitions. Word has length 20 [2019-11-28 20:22:45,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:45,998 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 160 transitions. [2019-11-28 20:22:45,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 20:22:45,998 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 160 transitions. [2019-11-28 20:22:45,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-28 20:22:45,999 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:46,001 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1] [2019-11-28 20:22:46,001 INFO L410 AbstractCegarLoop]: === Iteration 9 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:46,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:46,002 INFO L82 PathProgramCache]: Analyzing trace with hash -559247967, now seen corresponding path program 3 times [2019-11-28 20:22:46,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:46,005 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179486340] [2019-11-28 20:22:46,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:22:46,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179486340] [2019-11-28 20:22:46,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95057573] [2019-11-28 20:22:46,125 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:46,154 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-28 20:22:46,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 20:22:46,155 INFO L264 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 20:22:46,157 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:22:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:22:46,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:22:46,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-11-28 20:22:46,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881394367] [2019-11-28 20:22:46,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 20:22:46,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:46,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 20:22:46,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-28 20:22:46,168 INFO L87 Difference]: Start difference. First operand 125 states and 160 transitions. Second operand 11 states. [2019-11-28 20:22:46,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:46,431 INFO L93 Difference]: Finished difference Result 150 states and 192 transitions. [2019-11-28 20:22:46,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-28 20:22:46,434 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2019-11-28 20:22:46,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:46,436 INFO L225 Difference]: With dead ends: 150 [2019-11-28 20:22:46,436 INFO L226 Difference]: Without dead ends: 149 [2019-11-28 20:22:46,437 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-11-28 20:22:46,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-28 20:22:46,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2019-11-28 20:22:46,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-28 20:22:46,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 183 transitions. [2019-11-28 20:22:46,455 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 183 transitions. Word has length 22 [2019-11-28 20:22:46,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:46,456 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 183 transitions. [2019-11-28 20:22:46,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 20:22:46,456 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 183 transitions. [2019-11-28 20:22:46,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-28 20:22:46,457 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:46,457 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:22:46,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:46,662 INFO L410 AbstractCegarLoop]: === Iteration 10 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:46,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1606295908, now seen corresponding path program 2 times [2019-11-28 20:22:46,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:46,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962019639] [2019-11-28 20:22:46,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 20:22:46,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962019639] [2019-11-28 20:22:46,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272076427] [2019-11-28 20:22:46,769 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:46,807 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 20:22:46,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 20:22:46,809 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 20:22:46,810 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:22:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 20:22:46,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:22:46,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-11-28 20:22:46,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529691288] [2019-11-28 20:22:46,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 20:22:46,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:46,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 20:22:46,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-28 20:22:46,821 INFO L87 Difference]: Start difference. First operand 143 states and 183 transitions. Second operand 8 states. [2019-11-28 20:22:47,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:47,034 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2019-11-28 20:22:47,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 20:22:47,035 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-11-28 20:22:47,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:47,037 INFO L225 Difference]: With dead ends: 174 [2019-11-28 20:22:47,037 INFO L226 Difference]: Without dead ends: 173 [2019-11-28 20:22:47,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2019-11-28 20:22:47,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-11-28 20:22:47,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2019-11-28 20:22:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-11-28 20:22:47,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 206 transitions. [2019-11-28 20:22:47,056 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 206 transitions. Word has length 25 [2019-11-28 20:22:47,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:47,056 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 206 transitions. [2019-11-28 20:22:47,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 20:22:47,057 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 206 transitions. [2019-11-28 20:22:47,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-28 20:22:47,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:47,058 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1] [2019-11-28 20:22:47,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:47,270 INFO L410 AbstractCegarLoop]: === Iteration 11 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:47,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:47,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1828550785, now seen corresponding path program 4 times [2019-11-28 20:22:47,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:47,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396806077] [2019-11-28 20:22:47,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:22:47,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396806077] [2019-11-28 20:22:47,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369223502] [2019-11-28 20:22:47,405 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:47,458 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 20:22:47,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 20:22:47,459 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 20:22:47,461 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:22:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-28 20:22:47,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:22:47,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 13 [2019-11-28 20:22:47,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221637010] [2019-11-28 20:22:47,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 20:22:47,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:47,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 20:22:47,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-28 20:22:47,527 INFO L87 Difference]: Start difference. First operand 161 states and 206 transitions. Second operand 14 states. [2019-11-28 20:22:47,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:47,629 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2019-11-28 20:22:47,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 20:22:47,630 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-11-28 20:22:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:47,632 INFO L225 Difference]: With dead ends: 165 [2019-11-28 20:22:47,632 INFO L226 Difference]: Without dead ends: 164 [2019-11-28 20:22:47,633 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-11-28 20:22:47,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-28 20:22:47,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2019-11-28 20:22:47,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-11-28 20:22:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 205 transitions. [2019-11-28 20:22:47,647 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 205 transitions. Word has length 27 [2019-11-28 20:22:47,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:47,648 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 205 transitions. [2019-11-28 20:22:47,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 20:22:47,648 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 205 transitions. [2019-11-28 20:22:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-28 20:22:47,650 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:47,650 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:22:47,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:47,862 INFO L410 AbstractCegarLoop]: === Iteration 12 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:47,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:47,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1103662182, now seen corresponding path program 3 times [2019-11-28 20:22:47,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:47,863 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871722193] [2019-11-28 20:22:47,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 20:22:47,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871722193] [2019-11-28 20:22:47,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106160170] [2019-11-28 20:22:47,940 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:47,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-28 20:22:47,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 20:22:47,972 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 20:22:47,974 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:22:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 20:22:47,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:22:47,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-11-28 20:22:47,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338474458] [2019-11-28 20:22:47,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 20:22:47,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:47,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 20:22:47,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-28 20:22:47,983 INFO L87 Difference]: Start difference. First operand 161 states and 205 transitions. Second operand 10 states. [2019-11-28 20:22:48,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:48,270 INFO L93 Difference]: Finished difference Result 194 states and 248 transitions. [2019-11-28 20:22:48,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-28 20:22:48,271 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-11-28 20:22:48,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:48,273 INFO L225 Difference]: With dead ends: 194 [2019-11-28 20:22:48,273 INFO L226 Difference]: Without dead ends: 193 [2019-11-28 20:22:48,274 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-11-28 20:22:48,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-11-28 20:22:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 179. [2019-11-28 20:22:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-11-28 20:22:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 228 transitions. [2019-11-28 20:22:48,288 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 228 transitions. Word has length 30 [2019-11-28 20:22:48,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:48,288 INFO L462 AbstractCegarLoop]: Abstraction has 179 states and 228 transitions. [2019-11-28 20:22:48,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 20:22:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 228 transitions. [2019-11-28 20:22:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-28 20:22:48,290 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:48,290 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:22:48,498 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:48,499 INFO L410 AbstractCegarLoop]: === Iteration 13 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:48,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:48,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1629013057, now seen corresponding path program 1 times [2019-11-28 20:22:48,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:48,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436258360] [2019-11-28 20:22:48,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-28 20:22:48,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436258360] [2019-11-28 20:22:48,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:22:48,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 20:22:48,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714067103] [2019-11-28 20:22:48,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 20:22:48,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:48,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 20:22:48,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 20:22:48,569 INFO L87 Difference]: Start difference. First operand 179 states and 228 transitions. Second operand 5 states. [2019-11-28 20:22:48,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:48,607 INFO L93 Difference]: Finished difference Result 179 states and 228 transitions. [2019-11-28 20:22:48,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 20:22:48,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2019-11-28 20:22:48,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:48,612 INFO L225 Difference]: With dead ends: 179 [2019-11-28 20:22:48,612 INFO L226 Difference]: Without dead ends: 178 [2019-11-28 20:22:48,614 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 20:22:48,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-11-28 20:22:48,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2019-11-28 20:22:48,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-11-28 20:22:48,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 218 transitions. [2019-11-28 20:22:48,632 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 218 transitions. Word has length 31 [2019-11-28 20:22:48,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:48,632 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 218 transitions. [2019-11-28 20:22:48,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 20:22:48,633 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 218 transitions. [2019-11-28 20:22:48,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-28 20:22:48,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:48,636 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:22:48,637 INFO L410 AbstractCegarLoop]: === Iteration 14 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:48,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:48,637 INFO L82 PathProgramCache]: Analyzing trace with hash 857271516, now seen corresponding path program 4 times [2019-11-28 20:22:48,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:48,637 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839691526] [2019-11-28 20:22:48,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 20:22:48,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839691526] [2019-11-28 20:22:48,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046537811] [2019-11-28 20:22:48,757 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:48,786 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 20:22:48,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 20:22:48,787 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 20:22:48,789 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:22:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-28 20:22:48,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 20:22:48,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2019-11-28 20:22:48,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447798162] [2019-11-28 20:22:48,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 20:22:48,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:48,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 20:22:48,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-11-28 20:22:48,839 INFO L87 Difference]: Start difference. First operand 178 states and 218 transitions. Second operand 6 states. [2019-11-28 20:22:48,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:48,904 INFO L93 Difference]: Finished difference Result 239 states and 303 transitions. [2019-11-28 20:22:48,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 20:22:48,904 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-11-28 20:22:48,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:48,905 INFO L225 Difference]: With dead ends: 239 [2019-11-28 20:22:48,906 INFO L226 Difference]: Without dead ends: 111 [2019-11-28 20:22:48,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2019-11-28 20:22:48,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-28 20:22:48,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2019-11-28 20:22:48,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-28 20:22:48,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 126 transitions. [2019-11-28 20:22:48,927 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 126 transitions. Word has length 35 [2019-11-28 20:22:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:48,928 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 126 transitions. [2019-11-28 20:22:48,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 20:22:48,929 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 126 transitions. [2019-11-28 20:22:48,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-28 20:22:48,931 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:48,932 INFO L410 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 20:22:49,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:49,137 INFO L410 AbstractCegarLoop]: === Iteration 15 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:49,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:49,138 INFO L82 PathProgramCache]: Analyzing trace with hash -490250333, now seen corresponding path program 1 times [2019-11-28 20:22:49,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:49,138 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259950897] [2019-11-28 20:22:49,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-28 20:22:49,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259950897] [2019-11-28 20:22:49,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:22:49,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-28 20:22:49,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460876284] [2019-11-28 20:22:49,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 20:22:49,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:49,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 20:22:49,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-28 20:22:49,225 INFO L87 Difference]: Start difference. First operand 106 states and 126 transitions. Second operand 7 states. [2019-11-28 20:22:49,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:49,343 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2019-11-28 20:22:49,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 20:22:49,343 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-11-28 20:22:49,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:49,345 INFO L225 Difference]: With dead ends: 106 [2019-11-28 20:22:49,345 INFO L226 Difference]: Without dead ends: 105 [2019-11-28 20:22:49,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-28 20:22:49,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-28 20:22:49,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2019-11-28 20:22:49,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-28 20:22:49,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2019-11-28 20:22:49,356 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 35 [2019-11-28 20:22:49,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:49,356 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2019-11-28 20:22:49,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 20:22:49,356 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2019-11-28 20:22:49,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-28 20:22:49,357 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:49,357 INFO L410 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 20:22:49,358 INFO L410 AbstractCegarLoop]: === Iteration 16 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:49,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:49,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1982108899, now seen corresponding path program 1 times [2019-11-28 20:22:49,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:49,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406669768] [2019-11-28 20:22:49,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-28 20:22:49,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406669768] [2019-11-28 20:22:49,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:22:49,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-28 20:22:49,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141987532] [2019-11-28 20:22:49,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 20:22:49,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:49,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 20:22:49,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-28 20:22:49,457 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand 7 states. [2019-11-28 20:22:49,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:49,605 INFO L93 Difference]: Finished difference Result 124 states and 148 transitions. [2019-11-28 20:22:49,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 20:22:49,606 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-11-28 20:22:49,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:49,608 INFO L225 Difference]: With dead ends: 124 [2019-11-28 20:22:49,608 INFO L226 Difference]: Without dead ends: 123 [2019-11-28 20:22:49,609 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-28 20:22:49,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-28 20:22:49,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2019-11-28 20:22:49,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-28 20:22:49,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2019-11-28 20:22:49,623 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 36 [2019-11-28 20:22:49,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:49,625 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2019-11-28 20:22:49,626 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 20:22:49,626 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2019-11-28 20:22:49,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-28 20:22:49,628 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:49,628 INFO L410 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 20:22:49,629 INFO L410 AbstractCegarLoop]: === Iteration 17 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:49,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:49,629 INFO L82 PathProgramCache]: Analyzing trace with hash -732976513, now seen corresponding path program 2 times [2019-11-28 20:22:49,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:49,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335442823] [2019-11-28 20:22:49,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-28 20:22:49,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335442823] [2019-11-28 20:22:49,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960955880] [2019-11-28 20:22:49,763 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:49,802 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 20:22:49,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 20:22:49,804 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 20:22:49,810 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:22:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-28 20:22:49,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:22:49,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-28 20:22:49,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124551106] [2019-11-28 20:22:49,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 20:22:49,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:49,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 20:22:49,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-28 20:22:49,836 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 9 states. [2019-11-28 20:22:50,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:50,113 INFO L93 Difference]: Finished difference Result 140 states and 162 transitions. [2019-11-28 20:22:50,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-28 20:22:50,114 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2019-11-28 20:22:50,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:50,116 INFO L225 Difference]: With dead ends: 140 [2019-11-28 20:22:50,116 INFO L226 Difference]: Without dead ends: 139 [2019-11-28 20:22:50,118 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-11-28 20:22:50,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-28 20:22:50,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2019-11-28 20:22:50,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-11-28 20:22:50,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 161 transitions. [2019-11-28 20:22:50,134 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 161 transitions. Word has length 41 [2019-11-28 20:22:50,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:50,135 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 161 transitions. [2019-11-28 20:22:50,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 20:22:50,135 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 161 transitions. [2019-11-28 20:22:50,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-28 20:22:50,136 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:50,136 INFO L410 BasicCegarLoop]: trace histogram [7, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 20:22:50,340 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:50,340 INFO L410 AbstractCegarLoop]: === Iteration 18 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:50,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:50,341 INFO L82 PathProgramCache]: Analyzing trace with hash 2029893219, now seen corresponding path program 3 times [2019-11-28 20:22:50,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:50,341 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252265627] [2019-11-28 20:22:50,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-28 20:22:50,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252265627] [2019-11-28 20:22:50,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386931097] [2019-11-28 20:22:50,437 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:50,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-28 20:22:50,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 20:22:50,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 20:22:50,483 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:22:50,495 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-28 20:22:50,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:22:50,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-11-28 20:22:50,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271901152] [2019-11-28 20:22:50,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 20:22:50,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:50,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 20:22:50,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-28 20:22:50,498 INFO L87 Difference]: Start difference. First operand 139 states and 161 transitions. Second operand 11 states. [2019-11-28 20:22:50,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:50,856 INFO L93 Difference]: Finished difference Result 158 states and 183 transitions. [2019-11-28 20:22:50,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-28 20:22:50,856 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2019-11-28 20:22:50,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:50,858 INFO L225 Difference]: With dead ends: 158 [2019-11-28 20:22:50,858 INFO L226 Difference]: Without dead ends: 157 [2019-11-28 20:22:50,859 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2019-11-28 20:22:50,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-28 20:22:50,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-11-28 20:22:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-11-28 20:22:50,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2019-11-28 20:22:50,871 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 46 [2019-11-28 20:22:50,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:50,871 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2019-11-28 20:22:50,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 20:22:50,872 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2019-11-28 20:22:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-28 20:22:50,873 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:50,873 INFO L410 BasicCegarLoop]: trace histogram [8, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 20:22:51,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:51,077 INFO L410 AbstractCegarLoop]: === Iteration 19 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:51,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:51,078 INFO L82 PathProgramCache]: Analyzing trace with hash -613451521, now seen corresponding path program 4 times [2019-11-28 20:22:51,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:51,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732840464] [2019-11-28 20:22:51,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 62 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-28 20:22:51,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732840464] [2019-11-28 20:22:51,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224052554] [2019-11-28 20:22:51,241 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:51,297 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 20:22:51,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 20:22:51,299 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-28 20:22:51,302 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:22:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 62 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-28 20:22:51,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:22:51,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-11-28 20:22:51,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876245124] [2019-11-28 20:22:51,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 20:22:51,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:51,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 20:22:51,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-28 20:22:51,323 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand 13 states. [2019-11-28 20:22:51,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:51,788 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2019-11-28 20:22:51,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-28 20:22:51,792 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-11-28 20:22:51,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:51,793 INFO L225 Difference]: With dead ends: 176 [2019-11-28 20:22:51,793 INFO L226 Difference]: Without dead ends: 175 [2019-11-28 20:22:51,794 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2019-11-28 20:22:51,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-28 20:22:51,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-11-28 20:22:51,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-28 20:22:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 203 transitions. [2019-11-28 20:22:51,802 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 203 transitions. Word has length 51 [2019-11-28 20:22:51,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:51,802 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 203 transitions. [2019-11-28 20:22:51,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 20:22:51,802 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 203 transitions. [2019-11-28 20:22:51,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-28 20:22:51,804 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:51,804 INFO L410 BasicCegarLoop]: trace histogram [9, 7, 7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 20:22:52,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:52,007 INFO L410 AbstractCegarLoop]: === Iteration 20 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-28 20:22:52,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:52,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1845164003, now seen corresponding path program 5 times [2019-11-28 20:22:52,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:52,011 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559943708] [2019-11-28 20:22:52,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:22:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 46 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-28 20:22:52,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559943708] [2019-11-28 20:22:52,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017407506] [2019-11-28 20:22:52,145 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:52,182 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-28 20:22:52,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 20:22:52,183 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-28 20:22:52,189 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:22:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-28 20:22:52,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 20:22:52,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 20 [2019-11-28 20:22:52,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230124544] [2019-11-28 20:22:52,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 20:22:52,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:22:52,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 20:22:52,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2019-11-28 20:22:52,250 INFO L87 Difference]: Start difference. First operand 175 states and 203 transitions. Second operand 7 states. [2019-11-28 20:22:52,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:22:52,315 INFO L93 Difference]: Finished difference Result 215 states and 251 transitions. [2019-11-28 20:22:52,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 20:22:52,315 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2019-11-28 20:22:52,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:22:52,316 INFO L225 Difference]: With dead ends: 215 [2019-11-28 20:22:52,316 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 20:22:52,317 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2019-11-28 20:22:52,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 20:22:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 20:22:52,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 20:22:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 20:22:52,318 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2019-11-28 20:22:52,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:22:52,318 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:22:52,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 20:22:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 20:22:52,319 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 20:22:52,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:22:52,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 20:22:52,743 INFO L246 CegarLoopResult]: For program point gFINAL(lines 10 16) no Hoare annotation was computed. [2019-11-28 20:22:52,743 INFO L246 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2019-11-28 20:22:52,744 INFO L246 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2019-11-28 20:22:52,744 INFO L242 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (and (not (= |g_#in~x| 0)) (or (and (<= 0 g_~x) (<= g_~x 2147483647) (not (= 0 g_~x))) (not (<= 0 |g_#in~x|)) (not (<= |g_#in~x| 2147483647)))) [2019-11-28 20:22:52,744 INFO L246 CegarLoopResult]: For program point L12(lines 12 15) no Hoare annotation was computed. [2019-11-28 20:22:52,744 INFO L246 CegarLoopResult]: For program point L15-3(line 15) no Hoare annotation was computed. [2019-11-28 20:22:52,744 INFO L246 CegarLoopResult]: For program point L15-4(line 15) no Hoare annotation was computed. [2019-11-28 20:22:52,744 INFO L246 CegarLoopResult]: For program point L15-5(line 15) no Hoare annotation was computed. [2019-11-28 20:22:52,745 INFO L246 CegarLoopResult]: For program point gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-11-28 20:22:52,745 INFO L242 CegarLoopResult]: At program point L15-6(line 15) the Hoare annotation is: (and (not (= |g_#in~x| 0)) (or (not (<= 0 |g_#in~x|)) (and (<= 0 g_~x) (<= g_~x 2147483647) (<= |g_#t~ret0| 1) (<= 1 |g_#t~ret0|) (not (= 0 g_~x))) (not (<= |g_#in~x| 2147483647)))) [2019-11-28 20:22:52,745 INFO L246 CegarLoopResult]: For program point gEXIT(lines 10 16) no Hoare annotation was computed. [2019-11-28 20:22:52,745 INFO L246 CegarLoopResult]: For program point L15-7(line 15) no Hoare annotation was computed. [2019-11-28 20:22:52,746 INFO L249 CegarLoopResult]: At program point gENTRY(lines 10 16) the Hoare annotation is: true [2019-11-28 20:22:52,746 INFO L246 CegarLoopResult]: For program point gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-11-28 20:22:52,746 INFO L246 CegarLoopResult]: For program point gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-11-28 20:22:52,746 INFO L246 CegarLoopResult]: For program point gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-11-28 20:22:52,746 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 20:22:52,746 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 20:22:52,746 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 20:22:52,746 INFO L242 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2147483647) (<= 0 ULTIMATE.start_main_~x~0)) [2019-11-28 20:22:52,746 INFO L246 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2019-11-28 20:22:52,747 INFO L246 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2019-11-28 20:22:52,747 INFO L242 CegarLoopResult]: At program point L18(lines 18 22) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2019-11-28 20:22:52,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 08:22:52 BoogieIcfgContainer [2019-11-28 20:22:52,766 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 20:22:52,766 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 20:22:52,767 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 20:22:52,767 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 20:22:52,767 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:22:43" (3/4) ... [2019-11-28 20:22:52,771 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 20:22:52,779 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure g [2019-11-28 20:22:52,784 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-28 20:22:52,784 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 20:22:52,827 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 20:22:52,828 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 20:22:52,830 INFO L168 Benchmark]: Toolchain (without parser) took 10133.38 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 274.2 MB). Free memory was 960.4 MB in the beginning and 1.1 GB in the end (delta: -104.3 MB). Peak memory consumption was 169.9 MB. Max. memory is 11.5 GB. [2019-11-28 20:22:52,830 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:22:52,831 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.73 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:22:52,831 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.61 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:22:52,832 INFO L168 Benchmark]: Boogie Preprocessor took 78.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.9 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -174.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 20:22:52,832 INFO L168 Benchmark]: RCFGBuilder took 247.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. [2019-11-28 20:22:52,833 INFO L168 Benchmark]: TraceAbstraction took 9467.81 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 146.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 30.4 MB). Peak memory consumption was 176.6 MB. Max. memory is 11.5 GB. [2019-11-28 20:22:52,834 INFO L168 Benchmark]: Witness Printer took 61.22 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.7 MB). Peak memory consumption was 8.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:22:52,836 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 243.73 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.61 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 78.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.9 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -174.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 247.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9467.81 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 146.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 30.4 MB). Peak memory consumption was 176.6 MB. Max. memory is 11.5 GB. * Witness Printer took 61.22 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.7 MB). Peak memory consumption was 8.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: x <= 2147483647 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 4 error locations. Result: SAFE, OverallTime: 9.1s, OverallIterations: 20, TraceHistogramMax: 9, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, HoareTripleCheckerStatistics: 371 SDtfs, 640 SDslu, 1406 SDs, 0 SdLazy, 1497 SolverSat, 344 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 690 GetRequests, 438 SyntacticMatches, 4 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=179occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 20 MinimizatonAttempts, 89 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 170 PreInvPairs, 182 NumberOfFragments, 67 HoareAnnotationTreeSize, 170 FomulaSimplifications, 260 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 410 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 907 NumberOfCodeBlocks, 866 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 876 ConstructedInterpolants, 0 QuantifiedInterpolants, 77162 SizeOfPredicates, 30 NumberOfNonLiveVariables, 656 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 31 InterpolantComputations, 11 PerfectInterpolantSequences, 934/1271 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...