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/nla-digbench/lcm1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 12:28:27,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 12:28:27,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 12:28:27,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-05 12:28:27,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-05 12:28:27,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-05 12:28:27,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-05 12:28:27,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-05 12:28:27,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-05 12:28:27,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-05 12:28:27,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-05 12:28:27,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-05 12:28:27,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-05 12:28:27,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-05 12:28:27,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-05 12:28:27,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-05 12:28:27,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-05 12:28:27,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-05 12:28:27,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-05 12:28:27,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-05 12:28:27,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-05 12:28:27,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-05 12:28:27,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-05 12:28:27,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-05 12:28:27,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-05 12:28:27,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 12:28:27,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 12:28:27,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 12:28:27,564 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 [2019-09-05 12:28:27,582 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 12:28:27,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 12:28:27,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-05 12:28:27,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-05 12:28:27,583 INFO L138 SettingsManager]: * Use SBE=true [2019-09-05 12:28:27,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 12:28:27,584 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 12:28:27,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-05 12:28:27,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 12:28:27,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 12:28:27,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 12:28:27,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 12:28:27,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 12:28:27,587 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 12:28:27,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 12:28:27,588 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-05 12:28:27,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 12:28:27,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 12:28:27,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 12:28:27,588 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-05 12:28:27,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-05 12:28:27,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:28:27,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 12:28:27,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 12:28:27,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-05 12:28:27,591 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-05 12:28:27,591 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 12:28:27,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 12:28:27,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-05 12:28:27,630 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 12:28:27,642 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 12:28:27,646 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 12:28:27,648 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 12:28:27,648 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 12:28:27,649 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/lcm1.c [2019-09-05 12:28:27,711 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/485523ad2/4a568ff37ba343e5a59afda2db294a33/FLAG1ea773a64 [2019-09-05 12:28:28,170 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 12:28:28,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/lcm1.c [2019-09-05 12:28:28,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/485523ad2/4a568ff37ba343e5a59afda2db294a33/FLAG1ea773a64 [2019-09-05 12:28:28,552 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/485523ad2/4a568ff37ba343e5a59afda2db294a33 [2019-09-05 12:28:28,562 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 12:28:28,563 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 12:28:28,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 12:28:28,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 12:28:28,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 12:28:28,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:28:28" (1/1) ... [2019-09-05 12:28:28,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b0885a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:28, skipping insertion in model container [2019-09-05 12:28:28,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:28:28" (1/1) ... [2019-09-05 12:28:28,579 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 12:28:28,597 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 12:28:28,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:28:28,772 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 12:28:28,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:28:28,803 INFO L192 MainTranslator]: Completed translation [2019-09-05 12:28:28,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:28 WrapperNode [2019-09-05 12:28:28,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 12:28:28,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 12:28:28,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 12:28:28,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 12:28:28,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:28" (1/1) ... [2019-09-05 12:28:28,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:28" (1/1) ... [2019-09-05 12:28:28,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:28" (1/1) ... [2019-09-05 12:28:28,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:28" (1/1) ... [2019-09-05 12:28:28,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:28" (1/1) ... [2019-09-05 12:28:28,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:28" (1/1) ... [2019-09-05 12:28:28,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:28" (1/1) ... [2019-09-05 12:28:28,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 12:28:28,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 12:28:28,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 12:28:28,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 12:28:28,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:28" (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 [2019-09-05 12:28:28,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 12:28:28,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 12:28:28,993 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 12:28:28,993 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 12:28:28,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 12:28:28,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-05 12:28:28,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-05 12:28:28,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 12:28:28,994 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 12:28:28,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 12:28:28,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 12:28:29,183 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 12:28:29,184 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-05 12:28:29,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:28:29 BoogieIcfgContainer [2019-09-05 12:28:29,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 12:28:29,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 12:28:29,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 12:28:29,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 12:28:29,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 12:28:28" (1/3) ... [2019-09-05 12:28:29,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123f158f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:28:29, skipping insertion in model container [2019-09-05 12:28:29,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:28" (2/3) ... [2019-09-05 12:28:29,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123f158f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:28:29, skipping insertion in model container [2019-09-05 12:28:29,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:28:29" (3/3) ... [2019-09-05 12:28:29,194 INFO L109 eAbstractionObserver]: Analyzing ICFG lcm1.c [2019-09-05 12:28:29,204 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 12:28:29,212 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 12:28:29,240 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 12:28:29,289 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-05 12:28:29,290 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 12:28:29,291 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-05 12:28:29,291 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 12:28:29,291 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 12:28:29,291 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 12:28:29,291 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 12:28:29,292 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 12:28:29,292 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 12:28:29,315 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-09-05 12:28:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 12:28:29,321 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:29,322 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:29,326 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:29,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:29,333 INFO L82 PathProgramCache]: Analyzing trace with hash -831554694, now seen corresponding path program 1 times [2019-09-05 12:28:29,335 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:29,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:29,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:29,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:29,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:28:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:28:29,463 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:28:29,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 12:28:29,467 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 12:28:29,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 12:28:29,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:28:29,480 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2019-09-05 12:28:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:29,504 INFO L93 Difference]: Finished difference Result 49 states and 80 transitions. [2019-09-05 12:28:29,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 12:28:29,506 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-05 12:28:29,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:29,516 INFO L225 Difference]: With dead ends: 49 [2019-09-05 12:28:29,517 INFO L226 Difference]: Without dead ends: 22 [2019-09-05 12:28:29,521 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:28:29,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-05 12:28:29,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-05 12:28:29,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-05 12:28:29,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-09-05 12:28:29,568 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2019-09-05 12:28:29,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:29,568 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-09-05 12:28:29,568 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 12:28:29,569 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-09-05 12:28:29,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 12:28:29,569 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:29,570 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:29,570 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:29,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:29,571 INFO L82 PathProgramCache]: Analyzing trace with hash -871444843, now seen corresponding path program 1 times [2019-09-05 12:28:29,571 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:29,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:29,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:29,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:29,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:29,584 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:29,584 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:29,585 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 [2019-09-05 12:28:29,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:28:29,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-05 12:28:29,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:29,752 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:28:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:28:29,800 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:28:29,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-05 12:28:29,802 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:28:29,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:28:29,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:28:29,803 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 5 states. [2019-09-05 12:28:29,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:29,948 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2019-09-05 12:28:29,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 12:28:29,949 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-05 12:28:29,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:29,951 INFO L225 Difference]: With dead ends: 39 [2019-09-05 12:28:29,951 INFO L226 Difference]: Without dead ends: 37 [2019-09-05 12:28:29,954 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:28:29,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-05 12:28:29,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-09-05 12:28:29,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-05 12:28:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2019-09-05 12:28:29,983 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 10 [2019-09-05 12:28:29,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:29,983 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2019-09-05 12:28:29,983 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:28:29,984 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2019-09-05 12:28:29,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-05 12:28:29,985 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:29,985 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:29,985 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:29,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:29,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1387131099, now seen corresponding path program 1 times [2019-09-05 12:28:29,986 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:29,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:29,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:29,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:29,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:29,994 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:29,994 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:29,994 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) [2019-09-05 12:28:30,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:28:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:28:30,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-05 12:28:30,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:30,070 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:28:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:28:30,101 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:28:30,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-05 12:28:30,102 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 12:28:30,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 12:28:30,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:28:30,103 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand 6 states. [2019-09-05 12:28:30,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:30,282 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2019-09-05 12:28:30,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 12:28:30,283 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-09-05 12:28:30,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:30,285 INFO L225 Difference]: With dead ends: 56 [2019-09-05 12:28:30,286 INFO L226 Difference]: Without dead ends: 48 [2019-09-05 12:28:30,286 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:28:30,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-05 12:28:30,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-05 12:28:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-05 12:28:30,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2019-09-05 12:28:30,306 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 16 [2019-09-05 12:28:30,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:30,307 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2019-09-05 12:28:30,307 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 12:28:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2019-09-05 12:28:30,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-05 12:28:30,310 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:30,311 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:30,311 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:30,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:30,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1615934296, now seen corresponding path program 1 times [2019-09-05 12:28:30,312 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:30,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:30,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:30,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:30,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:30,329 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:30,330 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:30,330 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 [2019-09-05 12:28:30,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:28:30,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-05 12:28:30,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:30,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:28:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-05 12:28:30,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:28:30,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-05 12:28:30,446 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 12:28:30,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 12:28:30,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:28:30,447 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand 6 states. [2019-09-05 12:28:30,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:30,621 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2019-09-05 12:28:30,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 12:28:30,622 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-09-05 12:28:30,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:30,623 INFO L225 Difference]: With dead ends: 65 [2019-09-05 12:28:30,623 INFO L226 Difference]: Without dead ends: 63 [2019-09-05 12:28:30,624 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:28:30,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-05 12:28:30,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-09-05 12:28:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-05 12:28:30,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2019-09-05 12:28:30,636 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 24 [2019-09-05 12:28:30,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:30,637 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2019-09-05 12:28:30,637 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 12:28:30,637 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2019-09-05 12:28:30,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-05 12:28:30,638 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:30,638 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:30,639 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:30,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1283188595, now seen corresponding path program 2 times [2019-09-05 12:28:30,639 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:30,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:30,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:30,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:30,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:30,646 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:30,646 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:30,647 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 [2019-09-05 12:28:30,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:28:30,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:28:30,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:28:30,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-05 12:28:30,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:30,785 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:28:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Exception during sending of exit command (exit): Stream closed [2019-09-05 12:28:30,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:28:30,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-05 12:28:30,814 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-05 12:28:30,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-05 12:28:30,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:28:30,814 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand 7 states. [2019-09-05 12:28:31,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:31,064 INFO L93 Difference]: Finished difference Result 80 states and 107 transitions. [2019-09-05 12:28:31,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 12:28:31,065 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-09-05 12:28:31,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:31,067 INFO L225 Difference]: With dead ends: 80 [2019-09-05 12:28:31,067 INFO L226 Difference]: Without dead ends: 78 [2019-09-05 12:28:31,068 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:28:31,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-05 12:28:31,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2019-09-05 12:28:31,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-05 12:28:31,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2019-09-05 12:28:31,081 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 31 [2019-09-05 12:28:31,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:31,082 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2019-09-05 12:28:31,082 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-05 12:28:31,082 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2019-09-05 12:28:31,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-05 12:28:31,083 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:31,083 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:31,084 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:31,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:31,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1535457417, now seen corresponding path program 1 times [2019-09-05 12:28:31,084 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:31,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:31,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:31,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:28:31,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:31,093 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:31,093 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:31,095 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) [2019-09-05 12:28:31,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:28:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:28:31,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-05 12:28:31,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:31,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:28:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:28:31,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:28:31,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-05 12:28:31,251 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-05 12:28:31,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-05 12:28:31,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:28:31,252 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 7 states. [2019-09-05 12:28:31,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:31,471 INFO L93 Difference]: Finished difference Result 93 states and 125 transitions. [2019-09-05 12:28:31,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 12:28:31,472 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2019-09-05 12:28:31,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:31,474 INFO L225 Difference]: With dead ends: 93 [2019-09-05 12:28:31,474 INFO L226 Difference]: Without dead ends: 91 [2019-09-05 12:28:31,475 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:28:31,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-05 12:28:31,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 74. [2019-09-05 12:28:31,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-05 12:28:31,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2019-09-05 12:28:31,490 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 38 [2019-09-05 12:28:31,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:31,491 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2019-09-05 12:28:31,491 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-05 12:28:31,491 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2019-09-05 12:28:31,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-05 12:28:31,493 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:31,493 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:31,493 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:31,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:31,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1294737992, now seen corresponding path program 3 times [2019-09-05 12:28:31,494 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:31,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:31,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:31,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:31,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:31,501 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:31,501 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:31,501 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) [2019-09-05 12:28:31,518 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:28:31,541 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-05 12:28:31,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:28:31,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-05 12:28:31,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:31,616 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:28:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-09-05 12:28:31,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:28:31,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-05 12:28:31,658 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 12:28:31,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 12:28:31,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:28:31,659 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 8 states. [2019-09-05 12:28:31,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:31,842 INFO L93 Difference]: Finished difference Result 104 states and 140 transitions. [2019-09-05 12:28:31,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 12:28:31,842 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2019-09-05 12:28:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:31,847 INFO L225 Difference]: With dead ends: 104 [2019-09-05 12:28:31,847 INFO L226 Difference]: Without dead ends: 102 [2019-09-05 12:28:31,848 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:28:31,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-05 12:28:31,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2019-09-05 12:28:31,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-05 12:28:31,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 117 transitions. [2019-09-05 12:28:31,881 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 117 transitions. Word has length 38 [2019-09-05 12:28:31,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:31,881 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 117 transitions. [2019-09-05 12:28:31,881 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 12:28:31,881 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 117 transitions. [2019-09-05 12:28:31,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-05 12:28:31,885 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:31,885 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:31,887 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:31,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:31,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1467183567, now seen corresponding path program 1 times [2019-09-05 12:28:31,888 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:31,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:31,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:31,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:28:31,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:31,899 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:31,899 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:31,900 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-05 12:28:31,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:28:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:28:31,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-05 12:28:31,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:32,023 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:28:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:28:32,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:28:32,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-05 12:28:32,057 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 12:28:32,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 12:28:32,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:28:32,058 INFO L87 Difference]: Start difference. First operand 87 states and 117 transitions. Second operand 8 states. [2019-09-05 12:28:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:32,304 INFO L93 Difference]: Finished difference Result 142 states and 193 transitions. [2019-09-05 12:28:32,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-05 12:28:32,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2019-09-05 12:28:32,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:32,306 INFO L225 Difference]: With dead ends: 142 [2019-09-05 12:28:32,306 INFO L226 Difference]: Without dead ends: 100 [2019-09-05 12:28:32,307 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:28:32,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-05 12:28:32,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-09-05 12:28:32,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-05 12:28:32,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 133 transitions. [2019-09-05 12:28:32,321 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 133 transitions. Word has length 44 [2019-09-05 12:28:32,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:32,322 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 133 transitions. [2019-09-05 12:28:32,322 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 12:28:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 133 transitions. [2019-09-05 12:28:32,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-05 12:28:32,324 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:32,324 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:32,324 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:32,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:32,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1996165331, now seen corresponding path program 1 times [2019-09-05 12:28:32,325 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:32,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:32,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:32,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:32,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:32,331 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:32,331 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:32,331 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:28:32,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:28:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:28:32,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-05 12:28:32,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:32,666 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:28:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-09-05 12:28:32,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:28:32,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-05 12:28:32,709 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:28:32,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:28:32,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:28:32,710 INFO L87 Difference]: Start difference. First operand 100 states and 133 transitions. Second operand 10 states. [2019-09-05 12:28:39,813 WARN L188 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 18 [2019-09-05 12:28:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:48,114 INFO L93 Difference]: Finished difference Result 217 states and 308 transitions. [2019-09-05 12:28:48,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 12:28:48,117 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2019-09-05 12:28:48,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:48,119 INFO L225 Difference]: With dead ends: 217 [2019-09-05 12:28:48,120 INFO L226 Difference]: Without dead ends: 159 [2019-09-05 12:28:48,124 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:28:48,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-09-05 12:28:48,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 141. [2019-09-05 12:28:48,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-09-05 12:28:48,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 192 transitions. [2019-09-05 12:28:48,167 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 192 transitions. Word has length 44 [2019-09-05 12:28:48,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:48,169 INFO L475 AbstractCegarLoop]: Abstraction has 141 states and 192 transitions. [2019-09-05 12:28:48,169 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:28:48,169 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 192 transitions. [2019-09-05 12:28:48,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-05 12:28:48,175 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:48,176 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:48,176 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:48,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1303301358, now seen corresponding path program 1 times [2019-09-05 12:28:48,177 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:48,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:48,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:48,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:48,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:48,188 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:48,188 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:48,188 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:28:48,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:28:48,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-05 12:28:48,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:48,253 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:28:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-09-05 12:28:48,272 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:28:48,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-05 12:28:48,273 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 12:28:48,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 12:28:48,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:28:48,273 INFO L87 Difference]: Start difference. First operand 141 states and 192 transitions. Second operand 6 states. [2019-09-05 12:28:48,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:48,354 INFO L93 Difference]: Finished difference Result 245 states and 335 transitions. [2019-09-05 12:28:48,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 12:28:48,354 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2019-09-05 12:28:48,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:48,355 INFO L225 Difference]: With dead ends: 245 [2019-09-05 12:28:48,355 INFO L226 Difference]: Without dead ends: 0 [2019-09-05 12:28:48,361 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:28:48,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-05 12:28:48,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-05 12:28:48,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-05 12:28:48,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-05 12:28:48,362 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2019-09-05 12:28:48,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:48,362 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-05 12:28:48,362 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 12:28:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-05 12:28:48,363 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-05 12:28:48,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-05 12:28:48,785 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2019-09-05 12:28:48,804 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-09-05 12:28:48,805 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-05 12:28:48,805 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-05 12:28:48,805 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-05 12:28:48,805 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-05 12:28:48,805 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-05 12:28:48,805 INFO L439 ceAbstractionStarter]: At program point L35-2(lines 35 41) the Hoare annotation is: (and (<= 1 main_~a~0) (= (+ (* main_~x~0 main_~u~0) (* main_~y~0 main_~v~0)) (* main_~b~0 main_~a~0))) [2019-09-05 12:28:48,806 INFO L439 ceAbstractionStarter]: At program point L31(line 31) the Hoare annotation is: (and (<= 1 main_~a~0) (= (+ (* main_~x~0 main_~u~0) (* main_~y~0 main_~v~0)) (* main_~b~0 main_~a~0))) [2019-09-05 12:28:48,806 INFO L443 ceAbstractionStarter]: For program point L31-1(lines 30 50) no Hoare annotation was computed. [2019-09-05 12:28:48,806 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 17 58) no Hoare annotation was computed. [2019-09-05 12:28:48,806 INFO L439 ceAbstractionStarter]: At program point L52(line 52) the Hoare annotation is: (and (<= 1 main_~a~0) (<= main_~y~0 main_~x~0) (exists ((main_~x~0 Int)) (and (<= main_~y~0 main_~x~0) (= (+ (* main_~x~0 main_~u~0) (* main_~y~0 main_~v~0)) (* main_~b~0 main_~a~0)) (<= main_~x~0 main_~y~0))) (<= main_~x~0 main_~y~0)) [2019-09-05 12:28:48,806 INFO L439 ceAbstractionStarter]: At program point L44(line 44) the Hoare annotation is: (and (<= 1 main_~a~0) (= (+ (* main_~x~0 main_~u~0) (* main_~y~0 main_~v~0)) (* main_~b~0 main_~a~0))) [2019-09-05 12:28:48,806 INFO L443 ceAbstractionStarter]: For program point L44-1(lines 43 49) no Hoare annotation was computed. [2019-09-05 12:28:48,806 INFO L439 ceAbstractionStarter]: At program point L36(line 36) the Hoare annotation is: (and (<= 1 main_~a~0) (= (+ (* main_~x~0 main_~u~0) (* main_~y~0 main_~v~0)) (* main_~b~0 main_~a~0))) [2019-09-05 12:28:48,807 INFO L443 ceAbstractionStarter]: For program point L36-1(lines 35 41) no Hoare annotation was computed. [2019-09-05 12:28:48,807 INFO L443 ceAbstractionStarter]: For program point L53(line 53) no Hoare annotation was computed. [2019-09-05 12:28:48,807 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 17 58) no Hoare annotation was computed. [2019-09-05 12:28:48,807 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 17 58) the Hoare annotation is: true [2019-09-05 12:28:48,807 INFO L439 ceAbstractionStarter]: At program point L30-2(lines 30 50) the Hoare annotation is: (and (<= 1 main_~a~0) (<= main_~y~0 main_~x~0) (exists ((main_~x~0 Int)) (and (<= main_~y~0 main_~x~0) (= (+ (* main_~x~0 main_~u~0) (* main_~y~0 main_~v~0)) (* main_~b~0 main_~a~0)) (<= main_~x~0 main_~y~0))) (<= main_~x~0 main_~y~0)) [2019-09-05 12:28:48,807 INFO L443 ceAbstractionStarter]: For program point L43-1(lines 30 50) no Hoare annotation was computed. [2019-09-05 12:28:48,807 INFO L439 ceAbstractionStarter]: At program point L43-2(lines 30 50) the Hoare annotation is: (and (<= 1 main_~a~0) (= (+ (* main_~x~0 main_~u~0) (* main_~y~0 main_~v~0)) (* main_~b~0 main_~a~0))) [2019-09-05 12:28:48,807 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2019-09-05 12:28:48,808 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2019-09-05 12:28:48,808 INFO L443 ceAbstractionStarter]: For program point L11(lines 11 12) no Hoare annotation was computed. [2019-09-05 12:28:48,808 INFO L443 ceAbstractionStarter]: For program point L10(lines 10 13) no Hoare annotation was computed. [2019-09-05 12:28:48,808 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2019-09-05 12:28:48,808 INFO L443 ceAbstractionStarter]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2019-09-05 12:28:48,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.09 12:28:48 BoogieIcfgContainer [2019-09-05 12:28:48,823 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-05 12:28:48,825 INFO L168 Benchmark]: Toolchain (without parser) took 20261.01 ms. Allocated memory was 133.2 MB in the beginning and 260.6 MB in the end (delta: 127.4 MB). Free memory was 88.4 MB in the beginning and 181.1 MB in the end (delta: -92.7 MB). Peak memory consumption was 34.7 MB. Max. memory is 7.1 GB. [2019-09-05 12:28:48,825 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 133.2 MB. Free memory was 107.1 MB in the beginning and 106.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-05 12:28:48,826 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.72 ms. Allocated memory is still 133.2 MB. Free memory was 88.0 MB in the beginning and 78.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2019-09-05 12:28:48,827 INFO L168 Benchmark]: Boogie Preprocessor took 133.02 ms. Allocated memory was 133.2 MB in the beginning and 201.3 MB in the end (delta: 68.2 MB). Free memory was 78.1 MB in the beginning and 177.7 MB in the end (delta: -99.6 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2019-09-05 12:28:48,828 INFO L168 Benchmark]: RCFGBuilder took 248.26 ms. Allocated memory is still 201.3 MB. Free memory was 177.7 MB in the beginning and 164.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2019-09-05 12:28:48,829 INFO L168 Benchmark]: TraceAbstraction took 19636.02 ms. Allocated memory was 201.3 MB in the beginning and 260.6 MB in the end (delta: 59.2 MB). Free memory was 164.5 MB in the beginning and 181.1 MB in the end (delta: -16.6 MB). Peak memory consumption was 42.6 MB. Max. memory is 7.1 GB. [2019-09-05 12:28:48,833 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 133.2 MB. Free memory was 107.1 MB in the beginning and 106.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 239.72 ms. Allocated memory is still 133.2 MB. Free memory was 88.0 MB in the beginning and 78.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.02 ms. Allocated memory was 133.2 MB in the beginning and 201.3 MB in the end (delta: 68.2 MB). Free memory was 78.1 MB in the beginning and 177.7 MB in the end (delta: -99.6 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 248.26 ms. Allocated memory is still 201.3 MB. Free memory was 177.7 MB in the beginning and 164.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 19636.02 ms. Allocated memory was 201.3 MB in the beginning and 260.6 MB in the end (delta: 59.2 MB). Free memory was 164.5 MB in the beginning and 181.1 MB in the end (delta: -16.6 MB). Peak memory consumption was 42.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 1 <= a && x * u + y * v == b * a - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 <= a && x * u + y * v == b * a - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. SAFE Result, 19.5s OverallTime, 10 OverallIterations, 7 TraceHistogramMax, 16.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.4s HoareAnnotationTime, HoareTripleCheckerStatistics: 276 SDtfs, 144 SDslu, 915 SDs, 0 SdLazy, 915 SolverSat, 85 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 14.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 301 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 58 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 106 PreInvPairs, 161 NumberOfFragments, 138 HoareAnnotationTreeSize, 106 FomulaSimplifications, 2536 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 224 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 304 NumberOfCodeBlocks, 290 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 294 ConstructedInterpolants, 4 QuantifiedInterpolants, 57542 SizeOfPredicates, 23 NumberOfNonLiveVariables, 688 ConjunctsInSsa, 166 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 283/311 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...