/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-multidimensional/copy-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:29:01,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:29:01,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:29:01,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:29:01,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:29:01,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:29:01,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:29:01,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:29:01,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:29:01,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:29:01,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:29:01,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:29:01,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:29:01,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:29:01,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:29:01,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:29:01,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:29:01,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:29:01,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:29:01,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:29:01,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:29:01,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:29:01,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:29:01,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:29:01,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 01:29:01,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 01:29:01,522 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 01:29:01,524 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 01:29:01,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 01:29:01,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 01:29:01,525 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 01:29:01,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 01:29:01,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 01:29:01,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 01:29:01,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 01:29:01,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 01:29:01,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 01:29:01,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 01:29:01,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:29:01,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:29:01,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:29:01,539 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 01:29:01,559 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:29:01,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:29:01,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:29:01,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:29:01,561 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:29:01,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:29:01,561 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:29:01,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:29:01,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:29:01,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:29:01,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:29:01,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:29:01,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:29:01,563 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:29:01,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:29:01,563 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:29:01,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:29:01,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:29:01,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:29:01,564 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:29:01,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:29:01,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:29:01,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:29:01,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:29:01,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:29:01,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:29:01,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:29:01,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:29:01,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 01:29:01,845 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:29:01,859 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:29:01,862 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:29:01,864 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:29:01,864 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:29:01,865 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/copy-3-n-u.c [2019-11-07 01:29:01,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3852d8142/60a809abf24f4b7d9cc1afcfd2fa2552/FLAGde4879ee9 [2019-11-07 01:29:02,401 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:29:02,402 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-3-n-u.c [2019-11-07 01:29:02,412 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3852d8142/60a809abf24f4b7d9cc1afcfd2fa2552/FLAGde4879ee9 [2019-11-07 01:29:02,835 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3852d8142/60a809abf24f4b7d9cc1afcfd2fa2552 [2019-11-07 01:29:02,860 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:29:02,867 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:29:02,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:29:02,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:29:02,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:29:02,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:02" (1/1) ... [2019-11-07 01:29:02,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ec017b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:02, skipping insertion in model container [2019-11-07 01:29:02,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:02" (1/1) ... [2019-11-07 01:29:02,911 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:29:02,966 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:29:03,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:29:03,253 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:29:03,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:29:03,409 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:29:03,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03 WrapperNode [2019-11-07 01:29:03,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:29:03,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:29:03,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:29:03,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:29:03,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03" (1/1) ... [2019-11-07 01:29:03,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03" (1/1) ... [2019-11-07 01:29:03,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03" (1/1) ... [2019-11-07 01:29:03,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03" (1/1) ... [2019-11-07 01:29:03,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03" (1/1) ... [2019-11-07 01:29:03,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03" (1/1) ... [2019-11-07 01:29:03,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03" (1/1) ... [2019-11-07 01:29:03,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:29:03,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:29:03,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:29:03,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:29:03,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03" (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 [2019-11-07 01:29:03,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:29:03,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:29:03,535 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:29:03,535 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:29:03,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:29:03,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:29:03,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:29:03,536 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:29:03,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:29:03,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:29:03,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:29:03,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:29:03,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:29:03,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:29:03,926 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:29:03,926 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-07 01:29:03,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:03 BoogieIcfgContainer [2019-11-07 01:29:03,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:29:03,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:29:03,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:29:03,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:29:03,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:29:02" (1/3) ... [2019-11-07 01:29:03,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f81080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:03, skipping insertion in model container [2019-11-07 01:29:03,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:03" (2/3) ... [2019-11-07 01:29:03,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f81080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:03, skipping insertion in model container [2019-11-07 01:29:03,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:03" (3/3) ... [2019-11-07 01:29:03,940 INFO L109 eAbstractionObserver]: Analyzing ICFG copy-3-n-u.c [2019-11-07 01:29:03,961 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:29:03,971 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:29:03,999 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:29:04,025 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:29:04,026 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:29:04,026 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:29:04,026 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:29:04,027 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:29:04,027 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:29:04,027 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:29:04,028 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:29:04,056 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-07 01:29:04,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:29:04,061 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:04,062 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:04,065 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:04,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:04,071 INFO L82 PathProgramCache]: Analyzing trace with hash -444599937, now seen corresponding path program 1 times [2019-11-07 01:29:04,081 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:04,081 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632702067] [2019-11-07 01:29:04,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:04,165 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:04,166 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443850695] [2019-11-07 01:29:04,166 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 [2019-11-07 01:29:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:04,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:04,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:29:04,330 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:29:04,376 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632702067] [2019-11-07 01:29:04,379 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:04,379 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443850695] [2019-11-07 01:29:04,381 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:04,382 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-07 01:29:04,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171878927] [2019-11-07 01:29:04,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:29:04,392 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:04,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:29:04,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:29:04,415 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 4 states. [2019-11-07 01:29:04,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:04,545 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2019-11-07 01:29:04,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:29:04,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-07 01:29:04,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:04,566 INFO L225 Difference]: With dead ends: 46 [2019-11-07 01:29:04,566 INFO L226 Difference]: Without dead ends: 26 [2019-11-07 01:29:04,572 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:29:04,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-07 01:29:04,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-07 01:29:04,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-07 01:29:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-11-07 01:29:04,629 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 14 [2019-11-07 01:29:04,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:04,630 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-11-07 01:29:04,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:29:04,631 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-11-07 01:29:04,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 01:29:04,632 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:04,632 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:04,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:04,836 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:04,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:04,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1423815787, now seen corresponding path program 1 times [2019-11-07 01:29:04,837 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:04,837 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040408969] [2019-11-07 01:29:04,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:04,856 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:04,856 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384703649] [2019-11-07 01:29:04,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:04,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:04,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:29:04,945 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:29:04,975 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040408969] [2019-11-07 01:29:04,975 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:04,975 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384703649] [2019-11-07 01:29:04,976 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:04,976 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-07 01:29:04,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882384895] [2019-11-07 01:29:04,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:29:04,979 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:04,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:29:04,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:29:04,980 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2019-11-07 01:29:05,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:05,161 INFO L93 Difference]: Finished difference Result 60 states and 92 transitions. [2019-11-07 01:29:05,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:29:05,164 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-11-07 01:29:05,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:05,168 INFO L225 Difference]: With dead ends: 60 [2019-11-07 01:29:05,168 INFO L226 Difference]: Without dead ends: 42 [2019-11-07 01:29:05,170 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:29:05,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-07 01:29:05,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-11-07 01:29:05,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-07 01:29:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2019-11-07 01:29:05,204 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 18 [2019-11-07 01:29:05,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:05,208 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2019-11-07 01:29:05,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:29:05,209 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2019-11-07 01:29:05,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-07 01:29:05,211 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:05,212 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:05,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:05,437 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:05,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:05,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1484743943, now seen corresponding path program 1 times [2019-11-07 01:29:05,438 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:05,438 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990604302] [2019-11-07 01:29:05,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:05,452 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:05,453 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742134326] [2019-11-07 01:29:05,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-07 01:29:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:05,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:05,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 01:29:05,545 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 01:29:05,578 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990604302] [2019-11-07 01:29:05,578 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:05,578 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742134326] [2019-11-07 01:29:05,578 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:05,579 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-07 01:29:05,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921320301] [2019-11-07 01:29:05,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:29:05,581 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:05,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:29:05,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:29:05,582 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand 6 states. [2019-11-07 01:29:05,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:05,704 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2019-11-07 01:29:05,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:29:05,705 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-11-07 01:29:05,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:05,706 INFO L225 Difference]: With dead ends: 94 [2019-11-07 01:29:05,707 INFO L226 Difference]: Without dead ends: 62 [2019-11-07 01:29:05,708 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:29:05,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-07 01:29:05,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2019-11-07 01:29:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-07 01:29:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2019-11-07 01:29:05,722 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 26 [2019-11-07 01:29:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:05,723 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2019-11-07 01:29:05,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:29:05,723 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2019-11-07 01:29:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-07 01:29:05,724 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:05,724 INFO L410 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:05,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:05,937 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:05,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:05,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1860693383, now seen corresponding path program 1 times [2019-11-07 01:29:05,937 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:05,938 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751232028] [2019-11-07 01:29:05,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:05,953 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:05,954 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437428309] [2019-11-07 01:29:05,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-07 01:29:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:06,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:29:06,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-07 01:29:06,058 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-07 01:29:06,096 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751232028] [2019-11-07 01:29:06,096 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:06,097 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437428309] [2019-11-07 01:29:06,097 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [785345286] [2019-11-07 01:29:06,129 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-11-07 01:29:06,129 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:06,136 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:06,144 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:06,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:06,290 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:06,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:06,821 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:07,062 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:29:07,062 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 6] total 18 [2019-11-07 01:29:07,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957189666] [2019-11-07 01:29:07,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 01:29:07,064 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:07,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 01:29:07,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:29:07,065 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand 10 states. [2019-11-07 01:29:07,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:07,562 INFO L93 Difference]: Finished difference Result 93 states and 118 transitions. [2019-11-07 01:29:07,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-07 01:29:07,563 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-11-07 01:29:07,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:07,564 INFO L225 Difference]: With dead ends: 93 [2019-11-07 01:29:07,564 INFO L226 Difference]: Without dead ends: 68 [2019-11-07 01:29:07,565 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2019-11-07 01:29:07,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-07 01:29:07,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2019-11-07 01:29:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-07 01:29:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2019-11-07 01:29:07,583 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 34 [2019-11-07 01:29:07,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:07,583 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2019-11-07 01:29:07,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 01:29:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2019-11-07 01:29:07,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-07 01:29:07,585 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:07,585 INFO L410 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:07,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:07,789 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:07,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:07,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2019913140, now seen corresponding path program 1 times [2019-11-07 01:29:07,790 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:07,790 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479085661] [2019-11-07 01:29:07,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:07,802 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:07,802 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853238390] [2019-11-07 01:29:07,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-07 01:29:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:07,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:29:07,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-07 01:29:07,930 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-07 01:29:07,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479085661] [2019-11-07 01:29:07,974 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:07,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853238390] [2019-11-07 01:29:07,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [22214308] [2019-11-07 01:29:07,978 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:29:07,978 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:07,978 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:07,979 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:07,979 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:08,000 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:08,592 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:29:08,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:08,602 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:08,961 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-11-07 01:29:09,187 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:29:09,188 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 17] total 26 [2019-11-07 01:29:09,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441976250] [2019-11-07 01:29:09,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-07 01:29:09,189 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:09,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-07 01:29:09,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2019-11-07 01:29:09,190 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand 26 states. [2019-11-07 01:29:10,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:10,639 INFO L93 Difference]: Finished difference Result 173 states and 246 transitions. [2019-11-07 01:29:10,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 01:29:10,640 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2019-11-07 01:29:10,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:10,643 INFO L225 Difference]: With dead ends: 173 [2019-11-07 01:29:10,643 INFO L226 Difference]: Without dead ends: 122 [2019-11-07 01:29:10,644 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=383, Invalid=1423, Unknown=0, NotChecked=0, Total=1806 [2019-11-07 01:29:10,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-07 01:29:10,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2019-11-07 01:29:10,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-07 01:29:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 143 transitions. [2019-11-07 01:29:10,669 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 143 transitions. Word has length 44 [2019-11-07 01:29:10,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:10,669 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 143 transitions. [2019-11-07 01:29:10,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-07 01:29:10,670 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 143 transitions. [2019-11-07 01:29:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-07 01:29:10,671 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:10,671 INFO L410 BasicCegarLoop]: trace histogram [24, 12, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:10,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:10,875 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:10,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:10,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1572511948, now seen corresponding path program 2 times [2019-11-07 01:29:10,875 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:10,876 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64981393] [2019-11-07 01:29:10,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:10,886 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:10,887 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217893588] [2019-11-07 01:29:10,887 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 [2019-11-07 01:29:10,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:29:10,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:29:10,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:29:10,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2019-11-07 01:29:10,993 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2019-11-07 01:29:11,025 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64981393] [2019-11-07 01:29:11,026 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:11,026 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217893588] [2019-11-07 01:29:11,026 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [521464866] [2019-11-07 01:29:11,029 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:29:11,029 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:11,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:11,030 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:11,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:11,050 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:11,549 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:29:11,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:11,558 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:12,089 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:29:12,090 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 17] total 24 [2019-11-07 01:29:12,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930482328] [2019-11-07 01:29:12,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-07 01:29:12,091 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:12,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-07 01:29:12,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2019-11-07 01:29:12,092 INFO L87 Difference]: Start difference. First operand 117 states and 143 transitions. Second operand 24 states. [2019-11-07 01:29:12,449 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2019-11-07 01:29:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:13,847 INFO L93 Difference]: Finished difference Result 407 states and 515 transitions. [2019-11-07 01:29:13,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-07 01:29:13,849 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2019-11-07 01:29:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:13,853 INFO L225 Difference]: With dead ends: 407 [2019-11-07 01:29:13,854 INFO L226 Difference]: Without dead ends: 332 [2019-11-07 01:29:13,856 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=336, Invalid=1224, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 01:29:13,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2019-11-07 01:29:13,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 207. [2019-11-07 01:29:13,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-11-07 01:29:13,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 248 transitions. [2019-11-07 01:29:13,919 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 248 transitions. Word has length 68 [2019-11-07 01:29:13,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:13,920 INFO L462 AbstractCegarLoop]: Abstraction has 207 states and 248 transitions. [2019-11-07 01:29:13,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-07 01:29:13,920 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 248 transitions. [2019-11-07 01:29:13,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-07 01:29:13,923 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:13,923 INFO L410 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:14,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:14,127 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:14,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:14,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2130608861, now seen corresponding path program 3 times [2019-11-07 01:29:14,127 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:14,129 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610413265] [2019-11-07 01:29:14,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:14,145 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:14,145 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423939749] [2019-11-07 01:29:14,145 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