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/bresenham.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:10:39,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:10:39,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:10:39,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 20:10:39,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 20:10:39,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 20:10:39,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 20:10:39,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 20:10:39,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 20:10:39,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 20:10:39,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 20:10:39,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 20:10:39,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:10:39,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:10:39,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:10:39,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:10:39,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:10:39,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:10:39,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:10:39,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:10:39,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:10:39,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:10:39,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:10:39,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:10:39,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 20:10:39,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:10:39,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:10:39,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:10:39,564 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 [2019-09-03 20:10:39,582 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:10:39,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:10:39,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 20:10:39,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 20:10:39,584 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 20:10:39,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:10:39,584 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:10:39,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 20:10:39,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:10:39,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:10:39,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:10:39,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:10:39,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:10:39,586 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:10:39,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:10:39,586 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 20:10:39,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:10:39,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:10:39,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:10:39,587 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 20:10:39,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 20:10:39,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:10:39,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:10:39,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:10:39,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 20:10:39,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 20:10:39,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:10:39,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:10:39,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 20:10:39,617 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:10:39,629 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:10:39,633 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:10:39,634 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:10:39,635 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:10:39,636 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/bresenham.c [2019-09-03 20:10:39,695 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/007e6b3b8/fede448745354d778c914c76fd00d13f/FLAG0a27ad934 [2019-09-03 20:10:40,103 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:10:40,104 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/bresenham.c [2019-09-03 20:10:40,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/007e6b3b8/fede448745354d778c914c76fd00d13f/FLAG0a27ad934 [2019-09-03 20:10:40,516 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/007e6b3b8/fede448745354d778c914c76fd00d13f [2019-09-03 20:10:40,526 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:10:40,527 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:10:40,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:10:40,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:10:40,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:10:40,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:10:40" (1/1) ... [2019-09-03 20:10:40,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c6c6cf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:10:40, skipping insertion in model container [2019-09-03 20:10:40,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:10:40" (1/1) ... [2019-09-03 20:10:40,548 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:10:40,571 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:10:40,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:10:40,788 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:10:40,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:10:40,837 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:10:40,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:10:40 WrapperNode [2019-09-03 20:10:40,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:10:40,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:10:40,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:10:40,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:10:40,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:10:40" (1/1) ... [2019-09-03 20:10:40,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:10:40" (1/1) ... [2019-09-03 20:10:40,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:10:40" (1/1) ... [2019-09-03 20:10:40,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:10:40" (1/1) ... [2019-09-03 20:10:40,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:10:40" (1/1) ... [2019-09-03 20:10:40,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:10:40" (1/1) ... [2019-09-03 20:10:40,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:10:40" (1/1) ... [2019-09-03 20:10:40,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:10:40,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:10:40,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:10:40,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:10:40,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:10:40" (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 [2019-09-03 20:10:41,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:10:41,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:10:41,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:10:41,012 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:10:41,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:10:41,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 20:10:41,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 20:10:41,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:10:41,013 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:10:41,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:10:41,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:10:41,207 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:10:41,207 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 20:10:41,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:10:41 BoogieIcfgContainer [2019-09-03 20:10:41,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:10:41,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:10:41,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:10:41,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:10:41,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:10:40" (1/3) ... [2019-09-03 20:10:41,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a4dba21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:10:41, skipping insertion in model container [2019-09-03 20:10:41,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:10:40" (2/3) ... [2019-09-03 20:10:41,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a4dba21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:10:41, skipping insertion in model container [2019-09-03 20:10:41,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:10:41" (3/3) ... [2019-09-03 20:10:41,216 INFO L109 eAbstractionObserver]: Analyzing ICFG bresenham.c [2019-09-03 20:10:41,225 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:10:41,232 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:10:41,248 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:10:41,278 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 20:10:41,278 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:10:41,278 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 20:10:41,279 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:10:41,279 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:10:41,279 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:10:41,279 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:10:41,279 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:10:41,279 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:10:41,294 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-09-03 20:10:41,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:10:41,298 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:41,299 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:41,301 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:41,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1560104174, now seen corresponding path program 1 times [2019-09-03 20:10:41,307 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:41,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:41,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:41,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:10:41,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:10:41,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:10:41,418 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:10:41,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 20:10:41,421 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:10:41,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:10:41,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:10:41,434 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-09-03 20:10:41,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:41,454 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2019-09-03 20:10:41,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:10:41,455 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 20:10:41,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:41,463 INFO L225 Difference]: With dead ends: 39 [2019-09-03 20:10:41,463 INFO L226 Difference]: Without dead ends: 17 [2019-09-03 20:10:41,467 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 [2019-09-03 20:10:41,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-03 20:10:41,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-03 20:10:41,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-03 20:10:41,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-09-03 20:10:41,502 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2019-09-03 20:10:41,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:41,503 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-09-03 20:10:41,503 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:10:41,503 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-09-03 20:10:41,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:10:41,503 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:41,504 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:41,504 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:41,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:41,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1561891634, now seen corresponding path program 1 times [2019-09-03 20:10:41,505 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:41,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:41,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:41,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:10:41,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:41,513 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:41,514 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:41,514 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 [2019-09-03 20:10:41,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:10:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:10:41,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-03 20:10:41,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:10:41,768 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:10:41,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:10:41,770 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:10:41,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:10:41,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:10:41,771 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2019-09-03 20:10:41,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:41,886 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2019-09-03 20:10:41,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:10:41,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-03 20:10:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:41,889 INFO L225 Difference]: With dead ends: 28 [2019-09-03 20:10:41,889 INFO L226 Difference]: Without dead ends: 25 [2019-09-03 20:10:41,890 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:10:41,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-03 20:10:41,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-09-03 20:10:41,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-03 20:10:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-09-03 20:10:41,899 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2019-09-03 20:10:41,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:41,900 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-09-03 20:10:41,900 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:10:41,900 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-09-03 20:10:41,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-03 20:10:41,901 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:41,901 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:41,902 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:41,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:41,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1038075816, now seen corresponding path program 1 times [2019-09-03 20:10:41,903 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:41,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:41,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:41,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:10:41,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:41,910 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:41,911 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:41,911 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) [2019-09-03 20:10:41,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:10:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:10:41,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-03 20:10:41,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:10:42,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:42,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-03 20:10:42,094 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 20:10:42,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 20:10:42,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:10:42,095 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 9 states. [2019-09-03 20:10:42,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:42,300 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-09-03 20:10:42,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 20:10:42,300 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2019-09-03 20:10:42,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:42,303 INFO L225 Difference]: With dead ends: 37 [2019-09-03 20:10:42,303 INFO L226 Difference]: Without dead ends: 34 [2019-09-03 20:10:42,304 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:10:42,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-03 20:10:42,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-09-03 20:10:42,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-03 20:10:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2019-09-03 20:10:42,322 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 19 [2019-09-03 20:10:42,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:42,323 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2019-09-03 20:10:42,323 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 20:10:42,323 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2019-09-03 20:10:42,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-03 20:10:42,324 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:42,325 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:42,325 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:42,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:42,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1481884118, now seen corresponding path program 1 times [2019-09-03 20:10:42,326 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:42,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:42,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:42,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:10:42,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:42,343 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:42,344 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:42,344 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 [2019-09-03 20:10:42,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:10:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:10:42,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-03 20:10:42,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:10:42,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:42,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-03 20:10:42,517 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 20:10:42,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 20:10:42,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:10:42,518 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 9 states. [2019-09-03 20:10:42,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:42,695 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2019-09-03 20:10:42,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 20:10:42,696 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2019-09-03 20:10:42,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:42,697 INFO L225 Difference]: With dead ends: 45 [2019-09-03 20:10:42,697 INFO L226 Difference]: Without dead ends: 43 [2019-09-03 20:10:42,698 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:10:42,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-03 20:10:42,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-09-03 20:10:42,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-03 20:10:42,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-09-03 20:10:42,706 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 19 [2019-09-03 20:10:42,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:42,706 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-09-03 20:10:42,707 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 20:10:42,707 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-09-03 20:10:42,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-03 20:10:42,711 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:42,711 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:42,711 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:42,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:42,712 INFO L82 PathProgramCache]: Analyzing trace with hash 190103611, now seen corresponding path program 1 times [2019-09-03 20:10:42,712 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:42,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:42,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:42,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:10:42,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:42,718 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:42,718 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:42,718 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 [2019-09-03 20:10:42,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:10:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:10:42,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-03 20:10:42,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:42,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:10:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 20:10:42,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:42,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-03 20:10:42,932 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:10:42,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:10:42,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:10:42,933 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 11 states. [2019-09-03 20:10:43,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:43,077 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2019-09-03 20:10:43,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 20:10:43,077 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-09-03 20:10:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:43,079 INFO L225 Difference]: With dead ends: 49 [2019-09-03 20:10:43,079 INFO L226 Difference]: Without dead ends: 42 [2019-09-03 20:10:43,079 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:10:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-03 20:10:43,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-09-03 20:10:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-03 20:10:43,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2019-09-03 20:10:43,086 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 25 [2019-09-03 20:10:43,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:43,086 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2019-09-03 20:10:43,087 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:10:43,087 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2019-09-03 20:10:43,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-03 20:10:43,088 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:43,088 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:43,088 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:43,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:43,089 INFO L82 PathProgramCache]: Analyzing trace with hash -775079950, now seen corresponding path program 2 times [2019-09-03 20:10:43,089 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:43,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:43,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:43,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:10:43,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:43,094 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:43,094 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:43,095 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:10:43,116 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:10:43,132 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:10:43,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:10:43,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-03 20:10:43,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 20:10:43,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:43,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-03 20:10:43,293 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:10:43,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:10:43,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:10:43,294 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2019-09-03 20:10:43,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:43,489 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2019-09-03 20:10:43,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 20:10:43,490 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-09-03 20:10:43,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:43,491 INFO L225 Difference]: With dead ends: 54 [2019-09-03 20:10:43,491 INFO L226 Difference]: Without dead ends: 51 [2019-09-03 20:10:43,492 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:10:43,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-03 20:10:43,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2019-09-03 20:10:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-03 20:10:43,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-09-03 20:10:43,500 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 28 [2019-09-03 20:10:43,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:43,500 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-09-03 20:10:43,501 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:10:43,501 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-09-03 20:10:43,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-03 20:10:43,502 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:43,502 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:43,502 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:43,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:43,503 INFO L82 PathProgramCache]: Analyzing trace with hash 999927412, now seen corresponding path program 1 times [2019-09-03 20:10:43,503 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:43,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:43,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:43,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:10:43,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:43,509 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:43,509 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:43,509 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:10:43,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:10:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:10:43,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-03 20:10:43,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 20:10:43,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:43,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-03 20:10:43,724 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:10:43,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:10:43,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:10:43,725 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 11 states. [2019-09-03 20:10:43,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:43,893 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2019-09-03 20:10:43,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 20:10:43,893 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-09-03 20:10:43,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:43,894 INFO L225 Difference]: With dead ends: 54 [2019-09-03 20:10:43,895 INFO L226 Difference]: Without dead ends: 52 [2019-09-03 20:10:43,896 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:10:43,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-03 20:10:43,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-09-03 20:10:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-03 20:10:43,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-09-03 20:10:43,911 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 28 [2019-09-03 20:10:43,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:43,914 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-09-03 20:10:43,914 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:10:43,914 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-09-03 20:10:43,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-03 20:10:43,916 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:43,917 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:43,917 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:43,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1796148304, now seen corresponding path program 2 times [2019-09-03 20:10:43,918 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:43,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:43,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:43,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:10:43,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:43,926 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:43,927 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:43,927 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:10:43,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:10:43,960 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:10:43,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:10:43,962 WARN L254 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-03 20:10:43,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 20:10:44,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:44,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-03 20:10:44,101 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:10:44,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:10:44,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:10:44,102 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 11 states. [2019-09-03 20:10:44,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:44,277 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2019-09-03 20:10:44,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 20:10:44,278 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-09-03 20:10:44,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:44,280 INFO L225 Difference]: With dead ends: 70 [2019-09-03 20:10:44,281 INFO L226 Difference]: Without dead ends: 68 [2019-09-03 20:10:44,281 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:10:44,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-03 20:10:44,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2019-09-03 20:10:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-03 20:10:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2019-09-03 20:10:44,290 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 28 [2019-09-03 20:10:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:44,291 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2019-09-03 20:10:44,291 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:10:44,291 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2019-09-03 20:10:44,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-03 20:10:44,292 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:44,292 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:44,292 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:44,293 INFO L82 PathProgramCache]: Analyzing trace with hash -21140942, now seen corresponding path program 2 times [2019-09-03 20:10:44,293 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:44,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:44,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:44,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:10:44,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:44,297 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:44,298 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:44,298 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) [2019-09-03 20:10:44,346 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:10:44,369 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:10:44,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:10:44,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-03 20:10:44,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:44,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 20:10:44,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:44,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-03 20:10:44,493 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:10:44,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:10:44,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:10:44,494 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 11 states. [2019-09-03 20:10:44,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:44,692 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2019-09-03 20:10:44,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 20:10:44,693 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-09-03 20:10:44,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:44,694 INFO L225 Difference]: With dead ends: 70 [2019-09-03 20:10:44,695 INFO L226 Difference]: Without dead ends: 68 [2019-09-03 20:10:44,695 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:10:44,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-03 20:10:44,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2019-09-03 20:10:44,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-03 20:10:44,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2019-09-03 20:10:44,705 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 28 [2019-09-03 20:10:44,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:44,705 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2019-09-03 20:10:44,705 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:10:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2019-09-03 20:10:44,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-03 20:10:44,707 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:44,707 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:44,707 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:44,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:44,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1039880453, now seen corresponding path program 1 times [2019-09-03 20:10:44,708 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:44,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:44,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:44,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:10:44,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:44,714 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:44,714 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:44,714 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-03 20:10:44,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:10:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:10:44,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-03 20:10:44,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-03 20:10:44,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:44,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-03 20:10:44,885 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 20:10:44,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 20:10:44,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:10:44,886 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 7 states. [2019-09-03 20:10:45,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:45,058 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2019-09-03 20:10:45,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:10:45,060 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-09-03 20:10:45,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:45,062 INFO L225 Difference]: With dead ends: 71 [2019-09-03 20:10:45,062 INFO L226 Difference]: Without dead ends: 64 [2019-09-03 20:10:45,062 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:10:45,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-03 20:10:45,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2019-09-03 20:10:45,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-03 20:10:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2019-09-03 20:10:45,084 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 34 [2019-09-03 20:10:45,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:45,085 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2019-09-03 20:10:45,085 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 20:10:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2019-09-03 20:10:45,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-03 20:10:45,090 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:45,092 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:45,093 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:45,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:45,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1845541185, now seen corresponding path program 2 times [2019-09-03 20:10:45,093 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:45,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:45,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:45,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:10:45,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:45,098 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:45,099 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:45,099 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:10:45,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:10:45,135 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:10:45,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:10:45,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-03 20:10:45,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-03 20:10:45,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:45,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-03 20:10:45,243 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 20:10:45,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 20:10:45,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:10:45,244 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 7 states. [2019-09-03 20:10:45,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:45,475 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2019-09-03 20:10:45,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:10:45,475 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-09-03 20:10:45,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:45,477 INFO L225 Difference]: With dead ends: 74 [2019-09-03 20:10:45,477 INFO L226 Difference]: Without dead ends: 67 [2019-09-03 20:10:45,478 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:10:45,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-03 20:10:45,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2019-09-03 20:10:45,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-03 20:10:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2019-09-03 20:10:45,488 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 34 [2019-09-03 20:10:45,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:45,488 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2019-09-03 20:10:45,488 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 20:10:45,488 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2019-09-03 20:10:45,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-03 20:10:45,489 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:45,489 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:45,489 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:45,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:45,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1258735171, now seen corresponding path program 2 times [2019-09-03 20:10:45,490 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:45,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:45,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:45,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:10:45,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:45,494 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:45,494 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:45,495 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:10:45,509 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:10:45,524 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:10:45,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:10:45,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-03 20:10:45,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:45,775 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:10:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-03 20:10:45,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:45,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-03 20:10:45,827 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 20:10:45,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 20:10:45,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:10:45,828 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 14 states. [2019-09-03 20:10:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:46,083 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2019-09-03 20:10:46,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 20:10:46,083 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2019-09-03 20:10:46,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:46,085 INFO L225 Difference]: With dead ends: 70 [2019-09-03 20:10:46,085 INFO L226 Difference]: Without dead ends: 63 [2019-09-03 20:10:46,086 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:10:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-03 20:10:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 42. [2019-09-03 20:10:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-03 20:10:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-09-03 20:10:46,104 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2019-09-03 20:10:46,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:46,105 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-09-03 20:10:46,105 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 20:10:46,105 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-09-03 20:10:46,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-03 20:10:46,110 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:46,110 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:46,110 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:46,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:46,111 INFO L82 PathProgramCache]: Analyzing trace with hash 389577448, now seen corresponding path program 3 times [2019-09-03 20:10:46,111 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:46,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:46,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:46,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:10:46,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:46,116 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:46,116 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:46,116 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:10:46,146 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:10:46,159 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-03 20:10:46,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:10:46,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-03 20:10:46,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:46,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:10:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-03 20:10:46,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:46,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-03 20:10:46,275 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 20:10:46,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 20:10:46,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:10:46,276 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 9 states. [2019-09-03 20:10:46,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:46,380 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2019-09-03 20:10:46,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:10:46,381 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-09-03 20:10:46,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:46,383 INFO L225 Difference]: With dead ends: 71 [2019-09-03 20:10:46,383 INFO L226 Difference]: Without dead ends: 68 [2019-09-03 20:10:46,383 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:10:46,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-03 20:10:46,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2019-09-03 20:10:46,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-03 20:10:46,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2019-09-03 20:10:46,409 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 37 [2019-09-03 20:10:46,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:46,409 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2019-09-03 20:10:46,409 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 20:10:46,409 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2019-09-03 20:10:46,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-03 20:10:46,410 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:46,410 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:46,410 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:46,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:46,411 INFO L82 PathProgramCache]: Analyzing trace with hash -2130382486, now seen corresponding path program 3 times [2019-09-03 20:10:46,411 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:46,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:46,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:46,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:10:46,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:46,415 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:46,415 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:46,415 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:10:46,445 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:10:46,459 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-03 20:10:46,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:10:46,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-03 20:10:46,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:46,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:10:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-03 20:10:46,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:46,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 20:10:46,573 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:10:46,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:10:46,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:10:46,575 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 10 states. [2019-09-03 20:10:46,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:46,749 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-09-03 20:10:46,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:10:46,751 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2019-09-03 20:10:46,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:46,752 INFO L225 Difference]: With dead ends: 80 [2019-09-03 20:10:46,753 INFO L226 Difference]: Without dead ends: 78 [2019-09-03 20:10:46,753 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:10:46,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-03 20:10:46,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-09-03 20:10:46,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-03 20:10:46,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2019-09-03 20:10:46,773 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 37 [2019-09-03 20:10:46,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:46,774 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2019-09-03 20:10:46,774 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:10:46,774 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2019-09-03 20:10:46,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-03 20:10:46,777 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:46,777 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:46,778 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:46,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:46,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1143516456, now seen corresponding path program 4 times [2019-09-03 20:10:46,778 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:46,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:46,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:46,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:10:46,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:46,791 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:46,792 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:46,792 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:10:46,827 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:10:46,849 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:10:46,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:10:46,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-03 20:10:46,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:11:05,134 WARN L188 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 38 [2019-09-03 20:11:13,267 WARN L188 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 41 [2019-09-03 20:11:25,439 WARN L188 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 42 [2019-09-03 20:11:25,443 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:11:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 5 refuted. 15 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-03 20:11:25,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:11:25,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-03 20:11:25,533 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-03 20:11:25,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-03 20:11:25,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=93, Unknown=16, NotChecked=0, Total=132 [2019-09-03 20:11:25,534 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 12 states. [2019-09-03 20:11:38,388 WARN L188 SmtUtils]: Spent 8.13 s on a formula simplification that was a NOOP. DAG size: 62 [2019-09-03 20:12:07,554 WARN L188 SmtUtils]: Spent 4.30 s on a formula simplification that was a NOOP. DAG size: 52 [2019-09-03 20:12:31,734 WARN L188 SmtUtils]: Spent 8.10 s on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2019-09-03 20:12:45,908 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((main_~x~0 Int) (main_~y~0 Int)) (= 0 (+ (let ((.cse0 (* 2 c_main_~Y~0))) (+ (+ (- c_main_~X~0) (+ (* .cse0 main_~x~0) (- (* (* 2 c_main_~X~0) main_~y~0)))) .cse0)) (- c_main_~v~0)))) (exists ((main_~x~0 Int) (main_~y~0 Int)) (= 0 (let ((.cse1 (* 2 c_main_~Y~0))) (+ (+ (+ (- c_main_~X~0) (+ (* .cse1 main_~x~0) (- (* (* 2 c_main_~X~0) main_~y~0)))) .cse1) (+ (* (- 1) c_main_~v~0) .cse1)))))) is different from true [2019-09-03 20:13:10,162 WARN L188 SmtUtils]: Spent 12.09 s on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2019-09-03 20:13:58,877 WARN L188 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 39 [2019-09-03 20:14:27,243 WARN L188 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 52 [2019-09-03 20:15:12,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:15:12,024 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2019-09-03 20:15:12,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-03 20:15:12,025 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-09-03 20:15:12,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:15:12,026 INFO L225 Difference]: With dead ends: 109 [2019-09-03 20:15:12,026 INFO L226 Difference]: Without dead ends: 107 [2019-09-03 20:15:12,027 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 154.4s TimeCoverageRelationStatistics Valid=74, Invalid=258, Unknown=52, NotChecked=36, Total=420 [2019-09-03 20:15:12,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-03 20:15:12,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2019-09-03 20:15:12,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-09-03 20:15:12,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2019-09-03 20:15:12,044 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 37 [2019-09-03 20:15:12,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:15:12,044 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2019-09-03 20:15:12,045 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-03 20:15:12,045 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2019-09-03 20:15:12,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-03 20:15:12,045 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:15:12,046 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:15:12,046 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:15:12,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:15:12,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1989833876, now seen corresponding path program 5 times [2019-09-03 20:15:12,046 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:15:12,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:15:12,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:12,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:15:12,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:12,051 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:15:12,051 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:15:12,051 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:15:12,074 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:15:12,095 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-03 20:15:12,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:15:12,097 WARN L254 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-03 20:15:12,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:15:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-03 20:15:12,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:15:12,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-03 20:15:12,353 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 20:15:12,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 20:15:12,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:15:12,354 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand 14 states. [2019-09-03 20:15:12,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:15:12,575 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2019-09-03 20:15:12,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 20:15:12,576 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2019-09-03 20:15:12,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:15:12,577 INFO L225 Difference]: With dead ends: 120 [2019-09-03 20:15:12,577 INFO L226 Difference]: Without dead ends: 118 [2019-09-03 20:15:12,578 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:15:12,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-09-03 20:15:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2019-09-03 20:15:12,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-09-03 20:15:12,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2019-09-03 20:15:12,600 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 37 [2019-09-03 20:15:12,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:15:12,600 INFO L475 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2019-09-03 20:15:12,600 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 20:15:12,601 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2019-09-03 20:15:12,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-03 20:15:12,601 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:15:12,602 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:15:12,602 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:15:12,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:15:12,602 INFO L82 PathProgramCache]: Analyzing trace with hash -490942296, now seen corresponding path program 6 times [2019-09-03 20:15:12,602 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:15:12,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:15:12,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:12,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:15:12,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:12,609 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:15:12,609 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:15:12,609 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:15:12,629 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:15:12,643 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-09-03 20:15:12,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:15:12,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-03 20:15:12,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:15:12,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:15:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-03 20:15:12,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:15:12,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 20:15:12,773 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:15:12,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:15:12,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:15:12,774 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand 10 states. [2019-09-03 20:15:12,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:15:12,894 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2019-09-03 20:15:12,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:15:12,895 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2019-09-03 20:15:12,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:15:12,896 INFO L225 Difference]: With dead ends: 121 [2019-09-03 20:15:12,896 INFO L226 Difference]: Without dead ends: 117 [2019-09-03 20:15:12,897 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:15:12,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-09-03 20:15:12,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 62. [2019-09-03 20:15:12,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-03 20:15:12,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2019-09-03 20:15:12,908 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 37 [2019-09-03 20:15:12,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:15:12,908 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2019-09-03 20:15:12,908 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:15:12,909 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2019-09-03 20:15:12,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-03 20:15:12,909 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:15:12,909 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:15:12,910 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:15:12,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:15:12,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1213594757, now seen corresponding path program 3 times [2019-09-03 20:15:12,910 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:15:12,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:15:12,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:12,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:15:12,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:12,914 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:15:12,914 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:15:12,914 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:15:12,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:15:12,946 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-03 20:15:12,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:15:12,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-03 20:15:12,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:15:13,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:15:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-03 20:15:13,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:15:13,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-03 20:15:13,065 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-03 20:15:13,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-03 20:15:13,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:15:13,066 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 12 states. [2019-09-03 20:15:13,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:15:13,218 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2019-09-03 20:15:13,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 20:15:13,218 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2019-09-03 20:15:13,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:15:13,219 INFO L225 Difference]: With dead ends: 76 [2019-09-03 20:15:13,219 INFO L226 Difference]: Without dead ends: 71 [2019-09-03 20:15:13,220 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:15:13,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-03 20:15:13,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2019-09-03 20:15:13,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-09-03 20:15:13,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2019-09-03 20:15:13,234 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 43 [2019-09-03 20:15:13,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:15:13,235 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2019-09-03 20:15:13,235 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-03 20:15:13,235 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2019-09-03 20:15:13,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-03 20:15:13,236 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:15:13,236 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:15:13,236 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:15:13,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:15:13,236 INFO L82 PathProgramCache]: Analyzing trace with hash -994740039, now seen corresponding path program 4 times [2019-09-03 20:15:13,236 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:15:13,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:15:13,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:13,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:15:13,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:13,245 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:15:13,245 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:15:13,245 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:15:13,263 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:20:17,045 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:20:17,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:17,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-03 20:20:17,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-09-03 20:20:17,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:17,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-03 20:20:17,083 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:20:17,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:20:17,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:20:17,084 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 5 states. [2019-09-03 20:20:17,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:17,177 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2019-09-03 20:20:17,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:20:17,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2019-09-03 20:20:17,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:17,178 INFO L225 Difference]: With dead ends: 109 [2019-09-03 20:20:17,178 INFO L226 Difference]: Without dead ends: 95 [2019-09-03 20:20:17,178 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:20:17,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-09-03 20:20:17,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2019-09-03 20:20:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-03 20:20:17,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2019-09-03 20:20:17,198 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 43 [2019-09-03 20:20:17,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:17,198 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2019-09-03 20:20:17,198 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:20:17,198 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2019-09-03 20:20:17,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-03 20:20:17,199 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:17,199 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:17,199 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:17,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:17,200 INFO L82 PathProgramCache]: Analyzing trace with hash -511994883, now seen corresponding path program 5 times [2019-09-03 20:20:17,200 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:17,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:17,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:17,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:17,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:17,207 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:17,207 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:17,207 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:17,228 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:20:17,290 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-03 20:20:17,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:17,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-03 20:20:17,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:17,685 WARN L188 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-09-03 20:20:17,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-03 20:20:17,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:17,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-03 20:20:17,825 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-03 20:20:17,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-03 20:20:17,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:20:17,830 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand 17 states. [2019-09-03 20:20:18,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:18,221 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2019-09-03 20:20:18,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 20:20:18,221 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2019-09-03 20:20:18,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:18,223 INFO L225 Difference]: With dead ends: 105 [2019-09-03 20:20:18,223 INFO L226 Difference]: Without dead ends: 100 [2019-09-03 20:20:18,224 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:20:18,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-03 20:20:18,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2019-09-03 20:20:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-03 20:20:18,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2019-09-03 20:20:18,245 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 43 [2019-09-03 20:20:18,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:18,245 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2019-09-03 20:20:18,246 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-03 20:20:18,246 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2019-09-03 20:20:18,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-03 20:20:18,247 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:18,247 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:18,247 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:18,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:18,247 INFO L82 PathProgramCache]: Analyzing trace with hash 293665849, now seen corresponding path program 6 times [2019-09-03 20:20:18,247 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:18,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:18,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:18,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:18,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:18,251 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:18,251 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:18,251 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:20:18,278 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:41,203 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-09-03 20:21:41,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:41,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-03 20:21:41,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:41,330 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-03 20:21:41,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:41,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-03 20:21:41,362 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 20:21:41,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 20:21:41,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:21:41,363 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand 15 states. [2019-09-03 20:21:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:41,609 INFO L93 Difference]: Finished difference Result 117 states and 141 transitions. [2019-09-03 20:21:41,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 20:21:41,610 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2019-09-03 20:21:41,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:41,611 INFO L225 Difference]: With dead ends: 117 [2019-09-03 20:21:41,611 INFO L226 Difference]: Without dead ends: 112 [2019-09-03 20:21:41,612 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:21:41,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-09-03 20:21:41,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2019-09-03 20:21:41,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-03 20:21:41,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2019-09-03 20:21:41,631 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 43 [2019-09-03 20:21:41,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:41,632 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2019-09-03 20:21:41,632 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 20:21:41,632 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2019-09-03 20:21:41,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-03 20:21:41,633 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:41,633 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:41,634 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:41,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:41,634 INFO L82 PathProgramCache]: Analyzing trace with hash 370099783, now seen corresponding path program 7 times [2019-09-03 20:21:41,634 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:41,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:41,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:41,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:41,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:41,638 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:41,638 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:41,638 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:21:41,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:21:41,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-03 20:21:41,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:21:42,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:42,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-03 20:21:42,251 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:21:42,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:21:42,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:21:42,252 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand 11 states. [2019-09-03 20:21:46,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:46,081 INFO L93 Difference]: Finished difference Result 119 states and 142 transitions. [2019-09-03 20:21:46,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 20:21:46,086 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2019-09-03 20:21:46,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:46,087 INFO L225 Difference]: With dead ends: 119 [2019-09-03 20:21:46,087 INFO L226 Difference]: Without dead ends: 114 [2019-09-03 20:21:46,088 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:21:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-09-03 20:21:46,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2019-09-03 20:21:46,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-09-03 20:21:46,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2019-09-03 20:21:46,109 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 52 [2019-09-03 20:21:46,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:46,109 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2019-09-03 20:21:46,110 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:21:46,110 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2019-09-03 20:21:46,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-03 20:21:46,111 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:46,111 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:46,111 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:46,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:46,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1703307389, now seen corresponding path program 8 times [2019-09-03 20:21:46,111 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:46,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:46,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:46,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:21:46,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:46,115 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:46,115 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:46,115 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:46,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:21:46,147 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:21:46,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:46,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-03 20:21:46,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 55 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-03 20:21:46,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:46,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-03 20:21:46,197 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:21:46,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:21:46,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:21:46,198 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand 5 states. [2019-09-03 20:21:46,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:46,645 INFO L93 Difference]: Finished difference Result 125 states and 149 transitions. [2019-09-03 20:21:46,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:21:46,645 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-09-03 20:21:46,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:46,646 INFO L225 Difference]: With dead ends: 125 [2019-09-03 20:21:46,646 INFO L226 Difference]: Without dead ends: 106 [2019-09-03 20:21:46,647 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:21:46,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-03 20:21:46,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-09-03 20:21:46,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-03 20:21:46,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 126 transitions. [2019-09-03 20:21:46,667 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 126 transitions. Word has length 52 [2019-09-03 20:21:46,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:46,668 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 126 transitions. [2019-09-03 20:21:46,668 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:21:46,668 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 126 transitions. [2019-09-03 20:21:46,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-03 20:21:46,669 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:46,669 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:46,669 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:46,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:46,669 INFO L82 PathProgramCache]: Analyzing trace with hash -897646657, now seen corresponding path program 9 times [2019-09-03 20:21:46,670 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:46,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:46,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:46,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:46,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:46,673 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:46,673 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:46,674 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:46,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2