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 -i ../../../trunk/examples/svcomp/bitvector/gcd_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 12:49:34,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 12:49:34,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 12:49:34,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 12:49:34,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 12:49:34,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 12:49:34,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 12:49:34,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 12:49:34,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 12:49:34,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 12:49:34,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 12:49:34,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 12:49:34,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 12:49:34,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 12:49:34,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 12:49:34,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 12:49:34,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 12:49:34,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 12:49:34,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 12:49:34,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 12:49:34,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 12:49:34,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 12:49:34,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 12:49:34,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 12:49:34,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 12:49:34,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 12:49:34,315 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 12:49:34,316 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 12:49:34,317 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 [2019-09-07 12:49:34,330 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 12:49:34,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 12:49:34,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 12:49:34,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 12:49:34,332 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 12:49:34,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 12:49:34,333 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 12:49:34,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 12:49:34,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 12:49:34,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 12:49:34,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 12:49:34,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 12:49:34,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 12:49:34,334 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 12:49:34,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 12:49:34,334 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 12:49:34,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 12:49:34,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 12:49:34,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 12:49:34,335 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 12:49:34,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 12:49:34,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 12:49:34,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 12:49:34,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 12:49:34,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 12:49:34,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 12:49:34,336 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 12:49:34,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 12:49:34,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 12:49:34,365 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 12:49:34,377 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 12:49:34,380 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 12:49:34,382 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 12:49:34,382 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 12:49:34,383 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/gcd_1.c [2019-09-07 12:49:34,440 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7c9b47b4/115cbe78796949658b049b10df0fdd0b/FLAGe8336dc68 [2019-09-07 12:49:34,843 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 12:49:34,844 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/gcd_1.c [2019-09-07 12:49:34,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7c9b47b4/115cbe78796949658b049b10df0fdd0b/FLAGe8336dc68 [2019-09-07 12:49:35,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7c9b47b4/115cbe78796949658b049b10df0fdd0b [2019-09-07 12:49:35,259 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 12:49:35,260 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 12:49:35,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 12:49:35,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 12:49:35,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 12:49:35,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 12:49:35" (1/1) ... [2019-09-07 12:49:35,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f89b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:49:35, skipping insertion in model container [2019-09-07 12:49:35,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 12:49:35" (1/1) ... [2019-09-07 12:49:35,276 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 12:49:35,294 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 12:49:35,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 12:49:35,474 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 12:49:35,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 12:49:35,504 INFO L192 MainTranslator]: Completed translation [2019-09-07 12:49:35,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:49:35 WrapperNode [2019-09-07 12:49:35,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 12:49:35,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 12:49:35,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 12:49:35,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 12:49:35,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:49:35" (1/1) ... [2019-09-07 12:49:35,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:49:35" (1/1) ... [2019-09-07 12:49:35,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:49:35" (1/1) ... [2019-09-07 12:49:35,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:49:35" (1/1) ... [2019-09-07 12:49:35,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:49:35" (1/1) ... [2019-09-07 12:49:35,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:49:35" (1/1) ... [2019-09-07 12:49:35,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:49:35" (1/1) ... [2019-09-07 12:49:35,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 12:49:35,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 12:49:35,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 12:49:35,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 12:49:35,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:49:35" (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 [2019-09-07 12:49:35,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 12:49:35,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 12:49:35,672 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 12:49:35,673 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2019-09-07 12:49:35,673 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 12:49:35,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 12:49:35,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-09-07 12:49:35,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 12:49:35,673 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2019-09-07 12:49:35,674 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 12:49:35,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 12:49:35,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 12:49:35,884 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 12:49:35,884 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-07 12:49:35,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 12:49:35 BoogieIcfgContainer [2019-09-07 12:49:35,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 12:49:35,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 12:49:35,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 12:49:35,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 12:49:35,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 12:49:35" (1/3) ... [2019-09-07 12:49:35,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165a84a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 12:49:35, skipping insertion in model container [2019-09-07 12:49:35,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:49:35" (2/3) ... [2019-09-07 12:49:35,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165a84a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 12:49:35, skipping insertion in model container [2019-09-07 12:49:35,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 12:49:35" (3/3) ... [2019-09-07 12:49:35,893 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd_1.c [2019-09-07 12:49:35,904 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 12:49:35,913 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 12:49:35,931 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 12:49:35,986 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 12:49:35,986 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 12:49:35,987 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 12:49:35,987 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 12:49:35,987 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 12:49:35,987 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 12:49:35,992 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 12:49:35,992 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 12:49:35,993 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 12:49:36,012 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-09-07 12:49:36,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-07 12:49:36,018 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:49:36,019 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:49:36,021 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:49:36,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:49:36,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1582230590, now seen corresponding path program 1 times [2019-09-07 12:49:36,026 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:49:36,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:49:36,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:49:36,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:49:36,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:49:36,096 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:49:36,096 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:49:36,097 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-07 12:49:36,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:49:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:49:36,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core [2019-09-07 12:49:36,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:49:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:49:36,167 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:49:36,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 12:49:36,172 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 12:49:36,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 12:49:36,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 12:49:36,185 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2019-09-07 12:49:36,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:49:36,208 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-09-07 12:49:36,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 12:49:36,210 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2019-09-07 12:49:36,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:49:36,218 INFO L225 Difference]: With dead ends: 43 [2019-09-07 12:49:36,218 INFO L226 Difference]: Without dead ends: 20 [2019-09-07 12:49:36,222 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 12:49:36,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-07 12:49:36,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-07 12:49:36,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-07 12:49:36,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-09-07 12:49:36,260 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2019-09-07 12:49:36,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:49:36,261 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-09-07 12:49:36,261 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 12:49:36,261 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-09-07 12:49:36,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-07 12:49:36,262 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:49:36,262 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:49:36,262 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:49:36,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:49:36,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1352619966, now seen corresponding path program 1 times [2019-09-07 12:49:36,263 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:49:36,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:49:36,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:49:36,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:49:36,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:49:36,269 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:49:36,270 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:49:36,270 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-07 12:49:36,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:49:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:49:36,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 12:49:36,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:49:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 12:49:36,434 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:49:36,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-07 12:49:36,436 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 12:49:36,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 12:49:36,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:49:36,440 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2019-09-07 12:49:36,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:49:36,540 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2019-09-07 12:49:36,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 12:49:36,541 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-09-07 12:49:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:49:36,545 INFO L225 Difference]: With dead ends: 35 [2019-09-07 12:49:36,545 INFO L226 Difference]: Without dead ends: 24 [2019-09-07 12:49:36,546 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:49:36,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-07 12:49:36,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2019-09-07 12:49:36,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-07 12:49:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-09-07 12:49:36,561 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 19 [2019-09-07 12:49:36,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:49:36,563 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-09-07 12:49:36,563 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 12:49:36,564 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-09-07 12:49:36,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-07 12:49:36,564 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:49:36,565 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:49:36,567 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:49:36,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:49:36,568 INFO L82 PathProgramCache]: Analyzing trace with hash 959592956, now seen corresponding path program 1 times [2019-09-07 12:49:36,568 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:49:36,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:49:36,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:49:36,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:49:36,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:49:36,581 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:49:36,581 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:49:36,581 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-07 12:49:36,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:49:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:49:36,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 12:49:36,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:49:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 12:49:36,664 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:49:36,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-07 12:49:36,665 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 12:49:36,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 12:49:36,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:49:36,666 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2019-09-07 12:49:36,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:49:36,699 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-09-07 12:49:36,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 12:49:36,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-09-07 12:49:36,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:49:36,701 INFO L225 Difference]: With dead ends: 30 [2019-09-07 12:49:36,701 INFO L226 Difference]: Without dead ends: 21 [2019-09-07 12:49:36,701 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:49:36,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-07 12:49:36,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-07 12:49:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-07 12:49:36,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-07 12:49:36,706 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2019-09-07 12:49:36,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:49:36,707 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-07 12:49:36,707 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 12:49:36,707 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-07 12:49:36,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-07 12:49:36,708 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:49:36,708 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:49:36,708 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:49:36,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:49:36,709 INFO L82 PathProgramCache]: Analyzing trace with hash 129441053, now seen corresponding path program 1 times [2019-09-07 12:49:36,709 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:49:36,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:49:36,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:49:36,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:49:36,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:49:36,714 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:49:36,714 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:49:36,714 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-07 12:49:36,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:49:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:49:36,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 12:49:36,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:49:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 12:49:36,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:49:36,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-07 12:49:36,836 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 12:49:36,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 12:49:36,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-09-07 12:49:36,837 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2019-09-07 12:49:36,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:49:36,967 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2019-09-07 12:49:36,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 12:49:36,968 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-09-07 12:49:36,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:49:36,969 INFO L225 Difference]: With dead ends: 31 [2019-09-07 12:49:36,969 INFO L226 Difference]: Without dead ends: 22 [2019-09-07 12:49:36,970 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-09-07 12:49:36,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-07 12:49:36,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-07 12:49:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-07 12:49:36,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-09-07 12:49:36,976 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2019-09-07 12:49:36,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:49:36,976 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-09-07 12:49:36,977 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 12:49:36,977 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-09-07 12:49:36,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-07 12:49:36,978 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:49:36,979 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:49:36,980 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:49:36,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:49:36,980 INFO L82 PathProgramCache]: Analyzing trace with hash 164535836, now seen corresponding path program 2 times [2019-09-07 12:49:36,980 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:49:36,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:49:36,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:49:36,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:49:36,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:49:36,989 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:49:36,989 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:49:36,990 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-07 12:49:37,004 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:49:37,033 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:49:37,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:49:37,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 12:49:37,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:49:37,349 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 22 [2019-09-07 12:49:37,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,358 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,359 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,360 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,363 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,365 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,366 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,367 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,368 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,370 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,372 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,373 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,374 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,374 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,375 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,377 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,378 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,382 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:49:37,384 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:54:50,642 WARN L188 SmtUtils]: Spent 5.22 m on a formula simplification. DAG size of input: 101 DAG size of output: 54 [2019-09-07 12:55:15,568 WARN L188 SmtUtils]: Spent 20.61 s on a formula simplification. DAG size of input: 77 DAG size of output: 39 [2019-09-07 12:55:19,878 WARN L188 SmtUtils]: Spent 4.19 s on a formula simplification that was a NOOP. DAG size: 39 [2019-09-07 12:55:19,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 12:55:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 12:55:19,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:55:19,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-07 12:55:19,906 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 12:55:19,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 12:55:19,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=54, Unknown=2, NotChecked=0, Total=72 [2019-09-07 12:55:19,915 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2019-09-07 12:58:38,285 WARN L188 SmtUtils]: Spent 3.20 m on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2019-09-07 13:01:51,654 WARN L188 SmtUtils]: Spent 3.20 m on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2019-09-07 13:01:51,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 13:01:51,669 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2019-09-07 13:01:51,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 13:01:51,670 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-09-07 13:01:51,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 13:01:51,671 INFO L225 Difference]: With dead ends: 35 [2019-09-07 13:01:51,671 INFO L226 Difference]: Without dead ends: 26 [2019-09-07 13:01:51,671 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 731.7s TimeCoverageRelationStatistics Valid=26, Invalid=80, Unknown=4, NotChecked=0, Total=110 [2019-09-07 13:01:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-07 13:01:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-09-07 13:01:51,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-07 13:01:51,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-09-07 13:01:51,676 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2019-09-07 13:01:51,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 13:01:51,676 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-09-07 13:01:51,676 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 13:01:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-09-07 13:01:51,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-07 13:01:51,677 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 13:01:51,678 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 13:01:51,678 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 13:01:51,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 13:01:51,678 INFO L82 PathProgramCache]: Analyzing trace with hash 751341850, now seen corresponding path program 1 times [2019-09-07 13:01:51,678 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 13:01:51,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 13:01:51,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:01:51,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 13:01:51,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:01:51,683 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 13:01:51,683 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 13:01:51,683 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-07 13:01:51,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 13:02:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 13:02:22,176 WARN L254 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 44 conjunts are in the unsatisfiable core [2019-09-07 13:02:22,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 13:02:22,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 13:02:22,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 13:02:22,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 13:02:22,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 13:02:22,338 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 13:02:22,338 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 13:02:22,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 13:02:22,343 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 13:02:22,345 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 13:02:42,335 WARN L188 SmtUtils]: Spent 14.81 s on a formula simplification. DAG size of input: 134 DAG size of output: 39 [2019-09-07 13:04:03,149 WARN L188 SmtUtils]: Spent 1.15 m on a formula simplification. DAG size of input: 99 DAG size of output: 38 [2019-09-07 13:04:22,632 WARN L188 SmtUtils]: Spent 12.21 s on a formula simplification that was a NOOP. DAG size: 37 [2019-09-07 13:04:24,645 WARN L838 $PredicateComparison]: unable to prove that (and (< |c_gcd_test_#in~a| 0) (= 0 (mod (mod |c_gcd_test_#in~b| |c_gcd_test_#res|) 256)) (not (= |c_gcd_test_#in~b| 0)) (<= 0 |c_gcd_test_#in~b|) (not (= 0 |c_gcd_test_#res|)) (let ((.cse0 (mod (* 255 |c_gcd_test_#in~a|) 256))) (or (and (= (mod (mod .cse0 |c_gcd_test_#in~b|) 256) |c_gcd_test_#res|) (<= .cse0 127)) (let ((.cse1 (mod (+ .cse0 (- 256)) |c_gcd_test_#in~b|))) (and (not (= 0 .cse1)) (< 127 .cse0) (= (+ |c_gcd_test_#res| 256) (mod (+ (* 255 |c_gcd_test_#in~b|) .cse1) 256))))))) is different from false [2019-09-07 13:04:24,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 13:04:26,673 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (not (= 0 |c_main_#t~ret2|)))) (or (and (exists ((main_~x~0 Int) (main_~y~0 Int)) (let ((.cse0 (mod (* 255 main_~x~0) 256))) (and (= (mod (mod .cse0 main_~y~0) 256) |c_main_#t~ret2|) (<= .cse0 127) (= 0 (mod (mod main_~y~0 |c_main_#t~ret2|) 256)) (< 0 main_~y~0) (< main_~x~0 0) (<= 0 main_~y~0) (<= main_~y~0 127) (<= 0 (+ main_~x~0 128)) (not (= main_~y~0 0)) (= 0 (mod main_~x~0 main_~y~0))))) .cse1) (and .cse1 (exists ((main_~x~0 Int) (main_~y~0 Int)) (let ((.cse3 (mod (* 255 main_~x~0) 256))) (let ((.cse2 (mod (+ .cse3 (- 256)) main_~y~0))) (and (= 0 (mod (mod main_~y~0 |c_main_#t~ret2|) 256)) (< 0 main_~y~0) (< main_~x~0 0) (<= 0 main_~y~0) (<= main_~y~0 127) (<= 0 (+ main_~x~0 128)) (= (+ |c_main_#t~ret2| 256) (mod (+ .cse2 (* 255 main_~y~0)) 256)) (not (= 0 .cse2)) (not (= main_~y~0 0)) (< 127 .cse3) (= 0 (mod main_~x~0 main_~y~0))))))))) is different from false