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/ps6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:21:55,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:21:55,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:21:55,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 20:21:55,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 20:21:55,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 20:21:55,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 20:21:55,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 20:21:55,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 20:21:55,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 20:21:55,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 20:21:55,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 20:21:55,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:21:55,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:21:55,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:21:55,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:21:55,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:21:55,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:21:55,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:21:55,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:21:55,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:21:55,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:21:55,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:21:55,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:21:55,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 20:21:55,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:21:55,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:21:55,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:21:55,645 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 20:21:55,660 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:21:55,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:21:55,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 20:21:55,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 20:21:55,665 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 20:21:55,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:21:55,665 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:21:55,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 20:21:55,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:21:55,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:21:55,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:21:55,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:21:55,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:21:55,666 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:21:55,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:21:55,667 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 20:21:55,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:21:55,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:21:55,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:21:55,668 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 20:21:55,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 20:21:55,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:21:55,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:21:55,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:21:55,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 20:21:55,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 20:21:55,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:21:55,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:21:55,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 20:21:55,710 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:21:55,721 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:21:55,727 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:21:55,728 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:21:55,728 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:21:55,729 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps6.c [2019-09-03 20:21:55,783 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a0f3389b/1ac48db0b8a142658c4532b254440185/FLAG429d15a18 [2019-09-03 20:21:56,190 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:21:56,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps6.c [2019-09-03 20:21:56,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a0f3389b/1ac48db0b8a142658c4532b254440185/FLAG429d15a18 [2019-09-03 20:21:56,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a0f3389b/1ac48db0b8a142658c4532b254440185 [2019-09-03 20:21:56,613 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:21:56,614 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:21:56,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:21:56,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:21:56,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:21:56,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:21:56" (1/1) ... [2019-09-03 20:21:56,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1138c160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:21:56, skipping insertion in model container [2019-09-03 20:21:56,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:21:56" (1/1) ... [2019-09-03 20:21:56,631 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:21:56,648 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:21:56,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:21:56,843 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:21:56,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:21:56,880 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:21:56,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:21:56 WrapperNode [2019-09-03 20:21:56,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:21:56,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:21:56,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:21:56,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:21:56,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:21:56" (1/1) ... [2019-09-03 20:21:56,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:21:56" (1/1) ... [2019-09-03 20:21:56,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:21:56" (1/1) ... [2019-09-03 20:21:56,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:21:56" (1/1) ... [2019-09-03 20:21:56,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:21:56" (1/1) ... [2019-09-03 20:21:57,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:21:56" (1/1) ... [2019-09-03 20:21:57,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:21:56" (1/1) ... [2019-09-03 20:21:57,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:21:57,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:21:57,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:21:57,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:21:57,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:21:56" (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 20:21:57,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:21:57,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:21:57,057 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:21:57,057 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:21:57,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:21:57,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 20:21:57,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 20:21:57,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:21:57,058 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:21:57,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:21:57,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:21:57,223 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:21:57,224 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 20:21:57,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:21:57 BoogieIcfgContainer [2019-09-03 20:21:57,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:21:57,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:21:57,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:21:57,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:21:57,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:21:56" (1/3) ... [2019-09-03 20:21:57,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7f7307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:21:57, skipping insertion in model container [2019-09-03 20:21:57,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:21:56" (2/3) ... [2019-09-03 20:21:57,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7f7307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:21:57, skipping insertion in model container [2019-09-03 20:21:57,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:21:57" (3/3) ... [2019-09-03 20:21:57,233 INFO L109 eAbstractionObserver]: Analyzing ICFG ps6.c [2019-09-03 20:21:57,242 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:21:57,249 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:21:57,264 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:21:57,293 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 20:21:57,294 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:21:57,294 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 20:21:57,294 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:21:57,294 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:21:57,295 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:21:57,295 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:21:57,295 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:21:57,295 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:21:57,312 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-03 20:21:57,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:21:57,316 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:57,317 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:57,319 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:57,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:57,323 INFO L82 PathProgramCache]: Analyzing trace with hash -148746498, now seen corresponding path program 1 times [2019-09-03 20:21:57,324 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:57,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:57,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:57,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:21:57,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:21:57,416 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 20:21:57,418 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:21:57,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 20:21:57,421 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:21:57,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:21:57,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:21:57,433 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-09-03 20:21:57,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:57,452 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2019-09-03 20:21:57,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:21:57,453 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 20:21:57,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:57,461 INFO L225 Difference]: With dead ends: 37 [2019-09-03 20:21:57,461 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 20:21:57,464 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 20:21:57,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 20:21:57,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-03 20:21:57,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 20:21:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-03 20:21:57,503 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-09-03 20:21:57,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:57,504 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-03 20:21:57,504 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:21:57,504 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-03 20:21:57,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:21:57,506 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:57,506 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:57,506 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:57,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:57,507 INFO L82 PathProgramCache]: Analyzing trace with hash -156194248, now seen corresponding path program 1 times [2019-09-03 20:21:57,507 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:57,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:57,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:57,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:21:57,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:57,514 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:57,515 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:57,515 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 20:21:57,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:21:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:21:57,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-03 20:21:57,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:57,638 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 20:21:57,642 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:21:57,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:21:57,644 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:21:57,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:21:57,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:21:57,644 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-09-03 20:21:57,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:57,943 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-09-03 20:21:57,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:21:57,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-03 20:21:57,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:57,945 INFO L225 Difference]: With dead ends: 27 [2019-09-03 20:21:57,945 INFO L226 Difference]: Without dead ends: 23 [2019-09-03 20:21:57,946 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:21:57,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-03 20:21:57,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-03 20:21:57,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-03 20:21:57,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-09-03 20:21:57,956 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2019-09-03 20:21:57,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:57,956 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-09-03 20:21:57,956 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:21:57,956 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-09-03 20:21:57,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-03 20:21:57,957 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:57,957 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:57,960 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:57,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:57,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1425845280, now seen corresponding path program 1 times [2019-09-03 20:21:57,961 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:57,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:57,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:57,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:21:57,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:57,971 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:57,972 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:57,972 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:57,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:21:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:21:58,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 20:21:58,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:58,114 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 20:21:58,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:58,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-03 20:21:58,118 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:21:58,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:21:58,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:21:58,119 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2019-09-03 20:21:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:58,423 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-09-03 20:21:58,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:21:58,424 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-09-03 20:21:58,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:58,425 INFO L225 Difference]: With dead ends: 34 [2019-09-03 20:21:58,425 INFO L226 Difference]: Without dead ends: 32 [2019-09-03 20:21:58,426 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:21:58,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-03 20:21:58,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-09-03 20:21:58,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-03 20:21:58,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-09-03 20:21:58,435 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 17 [2019-09-03 20:21:58,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:58,436 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-09-03 20:21:58,436 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:21:58,436 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-09-03 20:21:58,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-03 20:21:58,437 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:58,437 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:58,438 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:58,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:58,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1905380040, now seen corresponding path program 2 times [2019-09-03 20:21:58,438 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:58,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:58,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:58,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:21:58,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:58,446 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:58,446 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:58,447 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 20:21:58,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:21:58,482 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:21:58,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:58,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-03 20:21:58,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 20:21:58,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:58,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-03 20:21:58,602 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 20:21:58,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 20:21:58,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:21:58,603 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2019-09-03 20:21:58,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:58,765 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-09-03 20:21:58,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 20:21:58,765 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-09-03 20:21:58,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:58,767 INFO L225 Difference]: With dead ends: 43 [2019-09-03 20:21:58,767 INFO L226 Difference]: Without dead ends: 41 [2019-09-03 20:21:58,767 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 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 20:21:58,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-03 20:21:58,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-09-03 20:21:58,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-03 20:21:58,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-09-03 20:21:58,777 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2019-09-03 20:21:58,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:58,777 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-09-03 20:21:58,777 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 20:21:58,777 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-09-03 20:21:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-03 20:21:58,778 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:58,779 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:58,779 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:58,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:58,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1054216485, now seen corresponding path program 1 times [2019-09-03 20:21:58,780 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:58,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:58,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:58,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:58,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:58,784 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:58,784 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:58,785 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 20:21:58,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:21:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:21:58,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-03 20:21:58,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:58,927 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-03 20:21:58,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:58,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 20:21:58,962 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:21:58,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:21:58,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:21:58,962 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 10 states. [2019-09-03 20:21:59,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:59,439 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-09-03 20:21:59,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 20:21:59,440 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-09-03 20:21:59,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:59,443 INFO L225 Difference]: With dead ends: 46 [2019-09-03 20:21:59,443 INFO L226 Difference]: Without dead ends: 38 [2019-09-03 20:21:59,444 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:21:59,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-03 20:21:59,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-03 20:21:59,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-03 20:21:59,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-09-03 20:21:59,452 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2019-09-03 20:21:59,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:59,453 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-09-03 20:21:59,453 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:21:59,453 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-09-03 20:21:59,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-03 20:21:59,454 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:59,454 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:59,455 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:59,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:59,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1107083552, now seen corresponding path program 3 times [2019-09-03 20:21:59,455 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:59,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:59,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:59,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:21:59,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:59,460 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:59,460 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:59,460 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 20:21:59,477 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:21:59,488 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-03 20:21:59,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:59,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 20:21:59,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:22:04,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:22:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-09-03 20:22:04,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:22:04,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-03 20:22:04,241 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:22:04,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:22:04,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=39, Unknown=2, NotChecked=0, Total=56 [2019-09-03 20:22:04,242 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2019-09-03 20:22:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:22:07,875 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2019-09-03 20:22:07,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:22:07,875 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-09-03 20:22:07,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:22:07,877 INFO L225 Difference]: With dead ends: 44 [2019-09-03 20:22:07,877 INFO L226 Difference]: Without dead ends: 40 [2019-09-03 20:22:07,877 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=26, Invalid=62, Unknown=2, NotChecked=0, Total=90 [2019-09-03 20:22:07,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-03 20:22:07,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2019-09-03 20:22:07,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-03 20:22:07,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-09-03 20:22:07,897 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 31 [2019-09-03 20:22:07,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:22:07,897 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-09-03 20:22:07,897 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:22:07,898 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-09-03 20:22:07,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-03 20:22:07,899 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:22:07,899 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:22:07,899 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:22:07,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:22:07,899 INFO L82 PathProgramCache]: Analyzing trace with hash 787245325, now seen corresponding path program 2 times [2019-09-03 20:22:07,900 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:22:07,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:22:07,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:07,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:22:07,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:07,913 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:22:07,914 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:22:07,914 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:22:07,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:22:07,944 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:22:07,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:22:07,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-03 20:22:07,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:22:08,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:22:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:22:08,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:22:08,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-03 20:22:08,125 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:22:08,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:22:08,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:22:08,126 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 11 states. [2019-09-03 20:22:08,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:22:08,455 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2019-09-03 20:22:08,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:22:08,456 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2019-09-03 20:22:08,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:22:08,460 INFO L225 Difference]: With dead ends: 45 [2019-09-03 20:22:08,460 INFO L226 Difference]: Without dead ends: 39 [2019-09-03 20:22:08,460 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:22:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-03 20:22:08,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-03 20:22:08,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-03 20:22:08,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-09-03 20:22:08,472 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2019-09-03 20:22:08,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:22:08,473 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-09-03 20:22:08,473 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:22:08,473 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-09-03 20:22:08,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-03 20:22:08,474 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:22:08,474 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:22:08,475 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:22:08,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:22:08,475 INFO L82 PathProgramCache]: Analyzing trace with hash -999891931, now seen corresponding path program 3 times [2019-09-03 20:22:08,475 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:22:08,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:22:08,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:08,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:22:08,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:08,480 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:22:08,480 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:22:08,480 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:22:08,507 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:22:08,611 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-03 20:22:08,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:22:08,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-03 20:22:08,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:22:08,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:22:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-09-03 20:22:08,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:22:08,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-03 20:22:08,762 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-03 20:22:08,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-03 20:22:08,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:22:08,763 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 12 states. [2019-09-03 20:22:08,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:22:08,966 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2019-09-03 20:22:08,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 20:22:08,967 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2019-09-03 20:22:08,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:22:08,968 INFO L225 Difference]: With dead ends: 48 [2019-09-03 20:22:08,968 INFO L226 Difference]: Without dead ends: 42 [2019-09-03 20:22:08,969 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:22:08,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-03 20:22:08,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-09-03 20:22:08,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-03 20:22:08,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-09-03 20:22:08,988 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 42 [2019-09-03 20:22:08,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:22:08,988 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-09-03 20:22:08,988 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-03 20:22:08,988 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-09-03 20:22:08,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-03 20:22:08,993 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:22:08,993 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:22:08,993 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:22:08,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:22:08,993 INFO L82 PathProgramCache]: Analyzing trace with hash -705610227, now seen corresponding path program 4 times [2019-09-03 20:22:08,994 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:22:08,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:22:08,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:08,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:22:08,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:09,005 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:22:09,005 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:22:09,005 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 20:22:09,024 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:22:09,048 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:22:09,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:22:09,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-03 20:22:09,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:22:09,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:22:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 11 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:22:09,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:22:09,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-03 20:22:09,191 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-03 20:22:09,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-03 20:22:09,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:22:09,192 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 12 states. [2019-09-03 20:22:09,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:22:09,405 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2019-09-03 20:22:09,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-03 20:22:09,406 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-09-03 20:22:09,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:22:09,407 INFO L225 Difference]: With dead ends: 51 [2019-09-03 20:22:09,407 INFO L226 Difference]: Without dead ends: 45 [2019-09-03 20:22:09,408 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:22:09,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-03 20:22:09,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-09-03 20:22:09,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-03 20:22:09,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2019-09-03 20:22:09,419 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 49 [2019-09-03 20:22:09,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:22:09,419 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2019-09-03 20:22:09,419 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-03 20:22:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2019-09-03 20:22:09,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-03 20:22:09,421 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:22:09,421 INFO L399 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:22:09,421 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:22:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:22:09,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1261987621, now seen corresponding path program 5 times [2019-09-03 20:22:09,421 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:22:09,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:22:09,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:09,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:22:09,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:09,426 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:22:09,426 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:22:09,426 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 20:22:09,444 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:22:09,482 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-03 20:22:09,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:22:09,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-03 20:22:09,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:22:09,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:22:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 16 proven. 61 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-09-03 20:22:09,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:22:09,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-03 20:22:09,662 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 20:22:09,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 20:22:09,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:22:09,662 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 13 states. [2019-09-03 20:22:09,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:22:09,878 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2019-09-03 20:22:09,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 20:22:09,879 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2019-09-03 20:22:09,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:22:09,880 INFO L225 Difference]: With dead ends: 54 [2019-09-03 20:22:09,880 INFO L226 Difference]: Without dead ends: 48 [2019-09-03 20:22:09,881 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:22:09,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-03 20:22:09,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-03 20:22:09,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-03 20:22:09,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2019-09-03 20:22:09,893 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 56 [2019-09-03 20:22:09,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:22:09,893 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2019-09-03 20:22:09,893 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 20:22:09,893 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2019-09-03 20:22:09,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-03 20:22:09,895 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:22:09,895 INFO L399 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:22:09,895 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:22:09,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:22:09,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1969050381, now seen corresponding path program 6 times [2019-09-03 20:22:09,895 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:22:09,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:22:09,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:09,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:22:09,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:09,900 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:22:09,900 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:22:09,900 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:22:09,932 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:22:10,435 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-03 20:22:10,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:22:10,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 42 conjunts are in the unsatisfiable core [2019-09-03 20:22:10,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:22:10,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:22:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-09-03 20:22:10,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:22:10,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-03 20:22:10,653 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 20:22:10,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 20:22:10,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:22:10,654 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 15 states. [2019-09-03 20:22:10,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:22:10,890 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2019-09-03 20:22:10,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 20:22:10,891 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-09-03 20:22:10,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:22:10,893 INFO L225 Difference]: With dead ends: 57 [2019-09-03 20:22:10,893 INFO L226 Difference]: Without dead ends: 51 [2019-09-03 20:22:10,893 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:22:10,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-03 20:22:10,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-03 20:22:10,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-03 20:22:10,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2019-09-03 20:22:10,918 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 63 [2019-09-03 20:22:10,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:22:10,919 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2019-09-03 20:22:10,919 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 20:22:10,919 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2019-09-03 20:22:10,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-03 20:22:10,920 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:22:10,920 INFO L399 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:22:10,920 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:22:10,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:22:10,921 INFO L82 PathProgramCache]: Analyzing trace with hash 855290405, now seen corresponding path program 7 times [2019-09-03 20:22:10,921 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:22:10,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:22:10,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:10,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:22:10,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:10,940 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:22:10,940 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:22:10,940 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) [2019-09-03 20:22:10,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:22:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:22:10,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 65 conjunts are in the unsatisfiable core [2019-09-03 20:22:11,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:22:13,195 WARN L860 $PredicateComparison]: unable to prove that (and (< 6 c_main_~k~0) (<= c_main_~c~0 7) (= 0 (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (+ (+ (+ (- (* c_main_~y~0 (* (* (* 5 c_main_~y~0) c_main_~y~0) c_main_~y~0))) (+ (* (* c_main_~y~0 (* (* (* c_main_~y~0 (* (- 2) c_main_~y~0)) c_main_~y~0) c_main_~y~0)) c_main_~y~0) (- (* (* c_main_~y~0 (* (* (* 6 c_main_~y~0) c_main_~y~0) c_main_~y~0)) c_main_~y~0)))) .cse0) (* (+ (+ (let ((.cse1 (+ c_main_~y~0 (- 1)))) (* .cse1 (* .cse1 (* .cse1 (* .cse1 .cse1))))) 4425) (* (* (* c_main_~y~0 .cse0) c_main_~y~0) c_main_~y~0)) 12)))) (= c_main_~y~0 7)) is different from true [2019-09-03 20:22:13,286 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:22:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 34 proven. 103 refuted. 0 times theorem prover too weak. 102 trivial. 7 not checked. [2019-09-03 20:22:13,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:22:13,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-03 20:22:13,334 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 20:22:13,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 20:22:13,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=183, Unknown=1, NotChecked=26, Total=240 [2019-09-03 20:22:13,335 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 16 states. [2019-09-03 20:22:15,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:22:15,714 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2019-09-03 20:22:15,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 20:22:15,715 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2019-09-03 20:22:15,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:22:15,716 INFO L225 Difference]: With dead ends: 64 [2019-09-03 20:22:15,717 INFO L226 Difference]: Without dead ends: 58 [2019-09-03 20:22:15,718 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=45, Invalid=264, Unknown=1, NotChecked=32, Total=342 [2019-09-03 20:22:15,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-03 20:22:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-09-03 20:22:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-03 20:22:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2019-09-03 20:22:15,730 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 70 [2019-09-03 20:22:15,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:22:15,730 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2019-09-03 20:22:15,730 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 20:22:15,731 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2019-09-03 20:22:15,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-09-03 20:22:15,732 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:22:15,732 INFO L399 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:22:15,732 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:22:15,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:22:15,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1484740595, now seen corresponding path program 8 times [2019-09-03 20:22:15,733 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:22:15,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:22:15,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:15,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:22:15,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:15,737 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:22:15,738 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:22:15,738 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) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:22:15,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:22:15,793 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:22:15,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:22:15,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 73 conjunts are in the unsatisfiable core [2019-09-03 20:22:15,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:22:16,130 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:22:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 39 proven. 137 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-09-03 20:22:16,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:22:16,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-03 20:22:16,231 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-03 20:22:16,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-03 20:22:16,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:22:16,233 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 17 states. [2019-09-03 20:22:17,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:22:17,003 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2019-09-03 20:22:17,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-03 20:22:17,003 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2019-09-03 20:22:17,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:22:17,004 INFO L225 Difference]: With dead ends: 71 [2019-09-03 20:22:17,005 INFO L226 Difference]: Without dead ends: 65 [2019-09-03 20:22:17,005 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:22:17,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-03 20:22:17,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-09-03 20:22:17,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-03 20:22:17,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2019-09-03 20:22:17,034 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 77 [2019-09-03 20:22:17,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:22:17,035 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2019-09-03 20:22:17,035 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-03 20:22:17,035 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2019-09-03 20:22:17,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-03 20:22:17,037 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:22:17,037 INFO L399 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:22:17,037 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:22:17,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:22:17,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1487028955, now seen corresponding path program 9 times [2019-09-03 20:22:17,038 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:22:17,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:22:17,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:17,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:22:17,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:17,043 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:22:17,043 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:22:17,043 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 20:22:17,065 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 20:22:17,366 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-03 20:22:17,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:22:17,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 54 conjunts are in the unsatisfiable core [2019-09-03 20:22:17,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:22:17,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:22:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 21 proven. 166 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-09-03 20:22:17,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:22:17,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-03 20:22:17,614 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-03 20:22:17,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-03 20:22:17,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:22:17,615 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 18 states. [2019-09-03 20:22:18,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:22:18,032 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2019-09-03 20:22:18,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 20:22:18,033 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 84 [2019-09-03 20:22:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:22:18,035 INFO L225 Difference]: With dead ends: 74 [2019-09-03 20:22:18,035 INFO L226 Difference]: Without dead ends: 68 [2019-09-03 20:22:18,036 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:22:18,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-03 20:22:18,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-09-03 20:22:18,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-03 20:22:18,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2019-09-03 20:22:18,049 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 84 [2019-09-03 20:22:18,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:22:18,050 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2019-09-03 20:22:18,050 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-03 20:22:18,050 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2019-09-03 20:22:18,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-03 20:22:18,051 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:22:18,052 INFO L399 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:22:18,052 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:22:18,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:22:18,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1163182835, now seen corresponding path program 10 times [2019-09-03 20:22:18,052 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:22:18,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:22:18,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:18,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:22:18,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:18,057 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:22:18,057 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:22:18,057 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 20:22:18,075 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:22:18,115 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:22:18,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:22:18,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 56 conjunts are in the unsatisfiable core [2019-09-03 20:22:18,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:22:18,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:22:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 23 proven. 199 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-09-03 20:22:18,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:22:18,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-03 20:22:18,325 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-03 20:22:18,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-03 20:22:18,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:22:18,325 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 18 states. [2019-09-03 20:22:18,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:22:18,813 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2019-09-03 20:22:18,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-03 20:22:18,813 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2019-09-03 20:22:18,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:22:18,815 INFO L225 Difference]: With dead ends: 77 [2019-09-03 20:22:18,815 INFO L226 Difference]: Without dead ends: 71 [2019-09-03 20:22:18,816 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:22:18,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-03 20:22:18,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-09-03 20:22:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-03 20:22:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2019-09-03 20:22:18,832 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 91 [2019-09-03 20:22:18,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:22:18,833 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2019-09-03 20:22:18,833 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-03 20:22:18,833 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2019-09-03 20:22:18,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-03 20:22:18,834 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:22:18,834 INFO L399 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:22:18,834 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:22:18,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:22:18,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1609463771, now seen corresponding path program 11 times [2019-09-03 20:22:18,835 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:22:18,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:22:18,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:18,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:22:18,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:18,840 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:22:18,840 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:22:18,840 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 20:22:18,857 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:22:18,930 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-03 20:22:18,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:22:18,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 60 conjunts are in the unsatisfiable core [2019-09-03 20:22:18,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:22:19,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:22:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 31 proven. 229 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-09-03 20:22:19,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:22:19,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-03 20:22:19,150 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 20:22:19,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 20:22:19,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:22:19,151 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 19 states. [2019-09-03 20:22:19,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:22:19,602 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2019-09-03 20:22:19,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-03 20:22:19,603 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2019-09-03 20:22:19,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:22:19,604 INFO L225 Difference]: With dead ends: 80 [2019-09-03 20:22:19,605 INFO L226 Difference]: Without dead ends: 74 [2019-09-03 20:22:19,605 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2019-09-03 20:22:19,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-09-03 20:22:19,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-09-03 20:22:19,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-03 20:22:19,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2019-09-03 20:22:19,619 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 98 [2019-09-03 20:22:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:22:19,620 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2019-09-03 20:22:19,620 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 20:22:19,620 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2019-09-03 20:22:19,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-03 20:22:19,621 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:22:19,621 INFO L399 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:22:19,622 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:22:19,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:22:19,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1322446323, now seen corresponding path program 12 times [2019-09-03 20:22:19,622 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:22:19,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:22:19,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:19,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:22:19,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:19,627 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:22:19,627 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:22:19,627 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 20:22:19,641 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:22:19,824 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-03 20:22:19,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:22:19,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 66 conjunts are in the unsatisfiable core [2019-09-03 20:22:19,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:22:20,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:22:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 27 proven. 274 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-09-03 20:22:20,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:22:20,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-03 20:22:20,106 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-03 20:22:20,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-03 20:22:20,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:22:20,108 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand 21 states. [2019-09-03 20:22:20,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:22:20,661 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2019-09-03 20:22:20,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 20:22:20,662 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2019-09-03 20:22:20,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:22:20,663 INFO L225 Difference]: With dead ends: 83 [2019-09-03 20:22:20,663 INFO L226 Difference]: Without dead ends: 77 [2019-09-03 20:22:20,664 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2019-09-03 20:22:20,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-09-03 20:22:20,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-09-03 20:22:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-03 20:22:20,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2019-09-03 20:22:20,676 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 105 [2019-09-03 20:22:20,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:22:20,677 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2019-09-03 20:22:20,677 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-03 20:22:20,677 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2019-09-03 20:22:20,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-03 20:22:20,678 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:22:20,678 INFO L399 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:22:20,678 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:22:20,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:22:20,679 INFO L82 PathProgramCache]: Analyzing trace with hash -523889883, now seen corresponding path program 13 times [2019-09-03 20:22:20,679 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:22:20,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:22:20,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:20,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:22:20,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:20,683 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:22:20,683 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:22:20,683 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:22:20,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:22:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:22:20,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 101 conjunts are in the unsatisfiable core [2019-09-03 20:22:20,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:22:21,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:22:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 64 proven. 317 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-09-03 20:22:21,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:22:21,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-03 20:22:21,316 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-03 20:22:21,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-03 20:22:21,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-09-03 20:22:21,317 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 22 states. [2019-09-03 20:22:28,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:22:28,992 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2019-09-03 20:22:28,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-03 20:22:28,992 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 112 [2019-09-03 20:22:28,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:22:28,994 INFO L225 Difference]: With dead ends: 90 [2019-09-03 20:22:28,994 INFO L226 Difference]: Without dead ends: 84 [2019-09-03 20:22:28,995 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2019-09-03 20:22:28,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-03 20:22:29,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-09-03 20:22:29,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-03 20:22:29,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2019-09-03 20:22:29,009 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 112 [2019-09-03 20:22:29,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:22:29,009 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2019-09-03 20:22:29,009 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-03 20:22:29,010 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2019-09-03 20:22:29,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-03 20:22:29,011 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:22:29,011 INFO L399 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:22:29,011 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:22:29,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:22:29,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1096165133, now seen corresponding path program 14 times [2019-09-03 20:22:29,011 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:22:29,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:22:29,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:29,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:22:29,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:29,016 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:22:29,016 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:22:29,016 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 20:22:29,041 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:22:29,084 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:22:29,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:22:29,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 109 conjunts are in the unsatisfiable core [2019-09-03 20:22:29,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:22:29,593 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:22:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 69 proven. 362 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2019-09-03 20:22:29,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:22:29,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-03 20:22:29,675 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 20:22:29,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 20:22:29,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:22:29,676 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand 23 states. [2019-09-03 20:22:30,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:22:30,670 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2019-09-03 20:22:30,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 20:22:30,670 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 119 [2019-09-03 20:22:30,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:22:30,672 INFO L225 Difference]: With dead ends: 97 [2019-09-03 20:22:30,672 INFO L226 Difference]: Without dead ends: 91 [2019-09-03 20:22:30,673 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2019-09-03 20:22:30,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-03 20:22:30,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-09-03 20:22:30,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-03 20:22:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2019-09-03 20:22:30,690 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 119 [2019-09-03 20:22:30,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:22:30,691 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2019-09-03 20:22:30,691 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 20:22:30,691 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2019-09-03 20:22:30,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-09-03 20:22:30,692 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:22:30,692 INFO L399 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:22:30,693 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:22:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:22:30,693 INFO L82 PathProgramCache]: Analyzing trace with hash -114598363, now seen corresponding path program 15 times [2019-09-03 20:22:30,693 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:22:30,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:22:30,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:30,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:22:30,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:22:30,698 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:22:30,698 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:22:30,698 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) [2019-09-03 20:22:30,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:24:43,441 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-03 20:24:43,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:24:43,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 78 conjunts are in the unsatisfiable core [2019-09-03 20:24:43,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:24:43,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:24:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 33 proven. 409 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-09-03 20:24:43,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:24:43,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-03 20:24:43,779 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-03 20:24:43,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-03 20:24:43,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-09-03 20:24:43,780 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 24 states. [2019-09-03 20:24:44,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:24:44,493 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2019-09-03 20:24:44,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-03 20:24:44,493 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 126 [2019-09-03 20:24:44,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:24:44,495 INFO L225 Difference]: With dead ends: 100 [2019-09-03 20:24:44,495 INFO L226 Difference]: Without dead ends: 94 [2019-09-03 20:24:44,496 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:24:44,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-03 20:24:44,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-09-03 20:24:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-03 20:24:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2019-09-03 20:24:44,529 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 126 [2019-09-03 20:24:44,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:24:44,530 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2019-09-03 20:24:44,530 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-03 20:24:44,530 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2019-09-03 20:24:44,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-09-03 20:24:44,533 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:24:44,534 INFO L399 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:24:44,534 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:24:44,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:24:44,534 INFO L82 PathProgramCache]: Analyzing trace with hash -713655283, now seen corresponding path program 16 times [2019-09-03 20:24:44,535 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:24:44,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:24:44,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:24:44,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:24:44,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:24:44,556 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:24:44,556 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:24:44,556 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) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:24:44,583 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:24:44,672 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:24:44,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:24:44,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 80 conjunts are in the unsatisfiable core [2019-09-03 20:24:44,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:24:45,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:24:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 35 proven. 460 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2019-09-03 20:24:45,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:24:45,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-03 20:24:45,253 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-03 20:24:45,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-03 20:24:45,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2019-09-03 20:24:45,254 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 24 states. [2019-09-03 20:24:46,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:24:46,086 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2019-09-03 20:24:46,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-03 20:24:46,086 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 133 [2019-09-03 20:24:46,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:24:46,087 INFO L225 Difference]: With dead ends: 103 [2019-09-03 20:24:46,087 INFO L226 Difference]: Without dead ends: 97 [2019-09-03 20:24:46,088 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:24:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-03 20:24:46,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-09-03 20:24:46,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-09-03 20:24:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2019-09-03 20:24:46,108 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 133 [2019-09-03 20:24:46,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:24:46,108 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2019-09-03 20:24:46,108 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-03 20:24:46,108 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2019-09-03 20:24:46,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-09-03 20:24:46,111 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:24:46,111 INFO L399 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:24:46,111 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:24:46,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:24:46,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1156671781, now seen corresponding path program 17 times [2019-09-03 20:24:46,112 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:24:46,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:24:46,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:24:46,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:24:46,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:24:46,118 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:24:46,118 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:24:46,118 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) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:24:46,134 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:24:46,399 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-03 20:24:46,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:24:46,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 84 conjunts are in the unsatisfiable core [2019-09-03 20:24:46,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:24:46,697 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:24:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 43 proven. 508 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-09-03 20:24:46,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:24:46,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-03 20:24:46,766 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-03 20:24:46,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-03 20:24:46,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2019-09-03 20:24:46,767 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand 25 states. [2019-09-03 20:24:47,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:24:47,565 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2019-09-03 20:24:47,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-03 20:24:47,567 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 140 [2019-09-03 20:24:47,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:24:47,568 INFO L225 Difference]: With dead ends: 106 [2019-09-03 20:24:47,568 INFO L226 Difference]: Without dead ends: 100 [2019-09-03 20:24:47,569 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:24:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-03 20:24:47,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-09-03 20:24:47,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-03 20:24:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2019-09-03 20:24:47,589 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 140 [2019-09-03 20:24:47,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:24:47,589 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2019-09-03 20:24:47,589 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-03 20:24:47,590 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2019-09-03 20:24:47,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-09-03 20:24:47,591 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:24:47,591 INFO L399 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:24:47,591 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:24:47,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:24:47,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1948380915, now seen corresponding path program 18 times [2019-09-03 20:24:47,591 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:24:47,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:24:47,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:24:47,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:24:47,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:24:47,598 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:24:47,598 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:24:47,598 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 20:24:47,619 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:24:49,567 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-03 20:24:49,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:24:49,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 90 conjunts are in the unsatisfiable core [2019-09-03 20:24:49,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:24:49,964 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:24:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 39 proven. 571 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-09-03 20:24:50,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:24:50,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-09-03 20:24:50,097 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-03 20:24:50,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-03 20:24:50,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:24:50,098 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand 27 states. [2019-09-03 20:24:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:24:51,064 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2019-09-03 20:24:51,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-03 20:24:51,064 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 147 [2019-09-03 20:24:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:24:51,065 INFO L225 Difference]: With dead ends: 109 [2019-09-03 20:24:51,066 INFO L226 Difference]: Without dead ends: 103 [2019-09-03 20:24:51,068 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2019-09-03 20:24:51,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-03 20:24:51,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2019-09-03 20:24:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-09-03 20:24:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 116 transitions. [2019-09-03 20:24:51,088 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 116 transitions. Word has length 147 [2019-09-03 20:24:51,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:24:51,089 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 116 transitions. [2019-09-03 20:24:51,090 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-03 20:24:51,090 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 116 transitions. [2019-09-03 20:24:51,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-09-03 20:24:51,093 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:24:51,093 INFO L399 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:24:51,093 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:24:51,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:24:51,094 INFO L82 PathProgramCache]: Analyzing trace with hash -339200987, now seen corresponding path program 19 times [2019-09-03 20:24:51,094 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:24:51,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:24:51,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:24:51,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:24:51,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:24:51,101 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:24:51,101 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:24:51,101 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 20:24:51,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:24:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:24:51,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 137 conjunts are in the unsatisfiable core [2019-09-03 20:24:51,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:24:51,587 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-09-03 20:24:54,580 WARN L188 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 43 DAG size of output: 9 [2019-09-03 20:24:54,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:24:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 94 proven. 632 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2019-09-03 20:24:54,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:24:54,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-09-03 20:24:54,722 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-03 20:24:54,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-03 20:24:54,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:24:54,722 INFO L87 Difference]: Start difference. First operand 103 states and 116 transitions. Second operand 28 states. [2019-09-03 20:25:02,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:25:02,067 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2019-09-03 20:25:02,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-03 20:25:02,067 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2019-09-03 20:25:02,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:25:02,069 INFO L225 Difference]: With dead ends: 116 [2019-09-03 20:25:02,069 INFO L226 Difference]: Without dead ends: 110 [2019-09-03 20:25:02,071 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2019-09-03 20:25:02,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-09-03 20:25:02,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2019-09-03 20:25:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-09-03 20:25:02,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2019-09-03 20:25:02,103 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 154 [2019-09-03 20:25:02,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:25:02,105 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2019-09-03 20:25:02,105 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-03 20:25:02,105 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2019-09-03 20:25:02,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-09-03 20:25:02,106 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:25:02,106 INFO L399 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:25:02,107 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:25:02,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:25:02,107 INFO L82 PathProgramCache]: Analyzing trace with hash 920446477, now seen corresponding path program 20 times [2019-09-03 20:25:02,107 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:25:02,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:25:02,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:02,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:25:02,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:02,116 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:25:02,116 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:25:02,116 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:25:02,126 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:25:02,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:25:02,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:25:02,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 145 conjunts are in the unsatisfiable core [2019-09-03 20:25:02,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:25:02,560 WARN L188 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-09-03 20:25:03,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:25:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 99 proven. 695 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2019-09-03 20:25:03,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:25:03,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-09-03 20:25:03,285 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-03 20:25:03,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-03 20:25:03,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-09-03 20:25:03,286 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 29 states. [2019-09-03 20:25:12,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:25:12,745 INFO L93 Difference]: Finished difference Result 123 states and 137 transitions. [2019-09-03 20:25:12,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-03 20:25:12,746 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 161 [2019-09-03 20:25:12,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:25:12,748 INFO L225 Difference]: With dead ends: 123 [2019-09-03 20:25:12,748 INFO L226 Difference]: Without dead ends: 117 [2019-09-03 20:25:12,749 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=919, Unknown=0, NotChecked=0, Total=992 [2019-09-03 20:25:12,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-09-03 20:25:12,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2019-09-03 20:25:12,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-09-03 20:25:12,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2019-09-03 20:25:12,768 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 161 [2019-09-03 20:25:12,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:25:12,768 INFO L475 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2019-09-03 20:25:12,768 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-03 20:25:12,768 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2019-09-03 20:25:12,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-09-03 20:25:12,769 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:25:12,770 INFO L399 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:25:12,770 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:25:12,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:25:12,770 INFO L82 PathProgramCache]: Analyzing trace with hash -513818843, now seen corresponding path program 21 times [2019-09-03 20:25:12,770 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:25:12,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:25:12,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:12,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:25:12,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:12,775 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:25:12,776 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:25:12,776 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:25:12,801 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:25:14,776 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-03 20:25:14,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:25:14,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 114 conjunts are in the unsatisfiable core [2019-09-03 20:25:14,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:25:17,250 WARN L188 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 43 DAG size of output: 9 [2019-09-03 20:25:17,280 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:25:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 157 proven. 762 refuted. 0 times theorem prover too weak. 832 trivial. 0 not checked. [2019-09-03 20:25:17,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:25:17,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-09-03 20:25:17,351 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-03 20:25:17,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-03 20:25:17,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=927, Unknown=0, NotChecked=0, Total=992 [2019-09-03 20:25:17,352 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand 32 states. [2019-09-03 20:25:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:25:18,493 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2019-09-03 20:25:18,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-03 20:25:18,494 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 168 [2019-09-03 20:25:18,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:25:18,496 INFO L225 Difference]: With dead ends: 130 [2019-09-03 20:25:18,496 INFO L226 Difference]: Without dead ends: 124 [2019-09-03 20:25:18,497 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190 [2019-09-03 20:25:18,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-09-03 20:25:18,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2019-09-03 20:25:18,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-09-03 20:25:18,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2019-09-03 20:25:18,517 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 168 [2019-09-03 20:25:18,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:25:18,518 INFO L475 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2019-09-03 20:25:18,518 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-03 20:25:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2019-09-03 20:25:18,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-09-03 20:25:18,519 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:25:18,519 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:25:18,520 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:25:18,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:25:18,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1556282125, now seen corresponding path program 22 times [2019-09-03 20:25:18,520 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:25:18,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:25:18,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:18,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:25:18,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:18,525 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:25:18,525 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:25:18,525 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:25:18,535 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:25:18,614 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:25:18,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:25:18,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 104 conjunts are in the unsatisfiable core [2019-09-03 20:25:18,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:25:19,025 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:25:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 47 proven. 829 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2019-09-03 20:25:19,102 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:25:19,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-09-03 20:25:19,103 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-03 20:25:19,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-03 20:25:19,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2019-09-03 20:25:19,104 INFO L87 Difference]: Start difference. First operand 124 states and 137 transitions. Second operand 30 states. [2019-09-03 20:25:20,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:25:20,193 INFO L93 Difference]: Finished difference Result 133 states and 148 transitions. [2019-09-03 20:25:20,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-03 20:25:20,193 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 175 [2019-09-03 20:25:20,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:25:20,195 INFO L225 Difference]: With dead ends: 133 [2019-09-03 20:25:20,195 INFO L226 Difference]: Without dead ends: 127 [2019-09-03 20:25:20,196 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=983, Unknown=0, NotChecked=0, Total=1056 [2019-09-03 20:25:20,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-09-03 20:25:20,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2019-09-03 20:25:20,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-09-03 20:25:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 141 transitions. [2019-09-03 20:25:20,228 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 141 transitions. Word has length 175 [2019-09-03 20:25:20,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:25:20,229 INFO L475 AbstractCegarLoop]: Abstraction has 127 states and 141 transitions. [2019-09-03 20:25:20,229 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-03 20:25:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 141 transitions. [2019-09-03 20:25:20,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-09-03 20:25:20,230 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:25:20,230 INFO L399 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:25:20,231 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:25:20,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:25:20,231 INFO L82 PathProgramCache]: Analyzing trace with hash -446166491, now seen corresponding path program 23 times [2019-09-03 20:25:20,231 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:25:20,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:25:20,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:20,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:25:20,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:20,236 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:25:20,236 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:25:20,236 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:25:20,254 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:25:32,443 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-09-03 20:25:32,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:25:32,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 215 conjunts are in the unsatisfiable core [2019-09-03 20:25:32,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:25:35,890 WARN L188 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 42 DAG size of output: 8 [2019-09-03 20:25:35,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:25:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2078 backedges. 361 proven. 949 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2019-09-03 20:25:36,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:25:36,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-09-03 20:25:36,011 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-03 20:25:36,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-03 20:25:36,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=990, Unknown=0, NotChecked=0, Total=1056 [2019-09-03 20:25:36,012 INFO L87 Difference]: Start difference. First operand 127 states and 141 transitions. Second operand 33 states. [2019-09-03 20:25:37,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:25:37,512 INFO L93 Difference]: Finished difference Result 140 states and 155 transitions. [2019-09-03 20:25:37,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-03 20:25:37,513 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 182 [2019-09-03 20:25:37,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:25:37,514 INFO L225 Difference]: With dead ends: 140 [2019-09-03 20:25:37,514 INFO L226 Difference]: Without dead ends: 134 [2019-09-03 20:25:37,515 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 136 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=82, Invalid=1178, Unknown=0, NotChecked=0, Total=1260 [2019-09-03 20:25:37,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-09-03 20:25:37,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2019-09-03 20:25:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-09-03 20:25:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 148 transitions. [2019-09-03 20:25:37,537 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 148 transitions. Word has length 182 [2019-09-03 20:25:37,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:25:37,538 INFO L475 AbstractCegarLoop]: Abstraction has 134 states and 148 transitions. [2019-09-03 20:25:37,538 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-03 20:25:37,538 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 148 transitions. [2019-09-03 20:25:37,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-09-03 20:25:37,539 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:25:37,540 INFO L399 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:25:37,540 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:25:37,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:25:37,540 INFO L82 PathProgramCache]: Analyzing trace with hash 937447437, now seen corresponding path program 24 times [2019-09-03 20:25:37,540 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:25:37,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:25:37,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:37,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:25:37,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:37,549 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:25:37,549 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:25:37,549 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:25:37,562 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:25:42,105 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-03 20:25:42,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:25:42,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 114 conjunts are in the unsatisfiable core [2019-09-03 20:25:42,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:25:42,593 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:25:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 51 proven. 976 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2019-09-03 20:25:42,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:25:42,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-09-03 20:25:42,669 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-03 20:25:42,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-03 20:25:42,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-09-03 20:25:42,669 INFO L87 Difference]: Start difference. First operand 134 states and 148 transitions. Second operand 33 states. [2019-09-03 20:25:43,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:25:43,915 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2019-09-03 20:25:43,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-03 20:25:43,916 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 189 [2019-09-03 20:25:43,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:25:43,917 INFO L225 Difference]: With dead ends: 143 [2019-09-03 20:25:43,917 INFO L226 Difference]: Without dead ends: 137 [2019-09-03 20:25:43,919 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=1180, Unknown=0, NotChecked=0, Total=1260 [2019-09-03 20:25:43,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-09-03 20:25:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2019-09-03 20:25:43,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-09-03 20:25:43,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 152 transitions. [2019-09-03 20:25:43,940 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 152 transitions. Word has length 189 [2019-09-03 20:25:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:25:43,941 INFO L475 AbstractCegarLoop]: Abstraction has 137 states and 152 transitions. [2019-09-03 20:25:43,941 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-03 20:25:43,941 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 152 transitions. [2019-09-03 20:25:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-09-03 20:25:43,942 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:25:43,943 INFO L399 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:25:43,943 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:25:43,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:25:43,943 INFO L82 PathProgramCache]: Analyzing trace with hash -2087643867, now seen corresponding path program 25 times [2019-09-03 20:25:43,943 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:25:43,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:25:43,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:43,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:25:43,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:25:43,948 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:25:43,948 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:25:43,948 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:25:43,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:25:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:25:44,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 173 conjunts are in the unsatisfiable core [2019-09-03 20:25:44,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:25:45,861 WARN L188 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 28 [2019-09-03 20:25:46,196 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:25:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2433 backedges. 124 proven. 1055 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2019-09-03 20:25:46,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:25:46,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-09-03 20:25:46,362 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-03 20:25:46,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-03 20:25:46,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-09-03 20:25:46,363 INFO L87 Difference]: Start difference. First operand 137 states and 152 transitions. Second operand 34 states. [2019-09-03 20:26:08,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:26:08,663 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2019-09-03 20:26:08,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-03 20:26:08,663 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 196 [2019-09-03 20:26:08,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:26:08,666 INFO L225 Difference]: With dead ends: 150 [2019-09-03 20:26:08,666 INFO L226 Difference]: Without dead ends: 144 [2019-09-03 20:26:08,667 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2019-09-03 20:26:08,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-09-03 20:26:08,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2019-09-03 20:26:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-09-03 20:26:08,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 159 transitions. [2019-09-03 20:26:08,692 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 159 transitions. Word has length 196 [2019-09-03 20:26:08,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:26:08,693 INFO L475 AbstractCegarLoop]: Abstraction has 144 states and 159 transitions. [2019-09-03 20:26:08,693 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-03 20:26:08,693 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 159 transitions. [2019-09-03 20:26:08,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-09-03 20:26:08,694 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:26:08,695 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:26:08,695 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:26:08,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:26:08,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1232804595, now seen corresponding path program 26 times [2019-09-03 20:26:08,695 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:26:08,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:26:08,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:26:08,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:26:08,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:26:08,701 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:26:08,701 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:26:08,702 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:26:08,720 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:26:08,805 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:26:08,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:26:08,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 181 conjunts are in the unsatisfiable core [2019-09-03 20:26:08,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:26:11,426 WARN L188 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 28 [2019-09-03 20:26:11,958 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:26:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2621 backedges. 129 proven. 1136 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2019-09-03 20:26:12,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:26:12,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-09-03 20:26:12,140 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-03 20:26:12,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-03 20:26:12,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-09-03 20:26:12,141 INFO L87 Difference]: Start difference. First operand 144 states and 159 transitions. Second operand 35 states. [2019-09-03 20:26:18,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:26:18,580 INFO L93 Difference]: Finished difference Result 157 states and 173 transitions. [2019-09-03 20:26:18,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-03 20:26:18,581 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 203 [2019-09-03 20:26:18,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:26:18,584 INFO L225 Difference]: With dead ends: 157 [2019-09-03 20:26:18,584 INFO L226 Difference]: Without dead ends: 151 [2019-09-03 20:26:18,585 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=85, Invalid=1321, Unknown=0, NotChecked=0, Total=1406 [2019-09-03 20:26:18,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-09-03 20:26:18,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2019-09-03 20:26:18,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-09-03 20:26:18,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2019-09-03 20:26:18,610 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 203 [2019-09-03 20:26:18,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:26:18,611 INFO L475 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2019-09-03 20:26:18,611 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-03 20:26:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2019-09-03 20:26:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-09-03 20:26:18,612 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:26:18,613 INFO L399 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:26:18,613 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:26:18,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:26:18,613 INFO L82 PathProgramCache]: Analyzing trace with hash 327868453, now seen corresponding path program 27 times [2019-09-03 20:26:18,613 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:26:18,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:26:18,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:26:18,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:26:18,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:26:18,618 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:26:18,624 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:26:18,624 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:26:18,648 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:30:21,328 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-09-03 20:30:21,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:30:21,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 126 conjunts are in the unsatisfiable core [2019-09-03 20:30:21,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:30:22,034 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:30:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2816 backedges. 57 proven. 1219 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2019-09-03 20:30:22,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:30:22,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-09-03 20:30:22,120 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-03 20:30:22,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-03 20:30:22,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-09-03 20:30:22,121 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand 36 states. [2019-09-03 20:30:23,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:30:23,732 INFO L93 Difference]: Finished difference Result 160 states and 177 transitions. [2019-09-03 20:30:23,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-03 20:30:23,733 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 210 [2019-09-03 20:30:23,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:30:23,735 INFO L225 Difference]: With dead ends: 160 [2019-09-03 20:30:23,735 INFO L226 Difference]: Without dead ends: 154 [2019-09-03 20:30:23,736 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=1396, Unknown=0, NotChecked=0, Total=1482 [2019-09-03 20:30:23,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-09-03 20:30:23,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2019-09-03 20:30:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-09-03 20:30:23,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 170 transitions. [2019-09-03 20:30:23,763 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 170 transitions. Word has length 210 [2019-09-03 20:30:23,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:30:23,764 INFO L475 AbstractCegarLoop]: Abstraction has 154 states and 170 transitions. [2019-09-03 20:30:23,764 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-03 20:30:23,764 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 170 transitions. [2019-09-03 20:30:23,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-09-03 20:30:23,765 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:30:23,766 INFO L399 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:30:23,766 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:30:23,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:30:23,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2063645197, now seen corresponding path program 28 times [2019-09-03 20:30:23,766 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:30:23,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:30:23,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:30:23,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:30:23,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:30:23,772 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:30:23,772 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:30:23,772 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:30:23,796 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:30:23,914 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:30:23,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:30:23,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 128 conjunts are in the unsatisfiable core [2019-09-03 20:30:23,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:30:24,784 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:30:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3018 backedges. 59 proven. 1306 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2019-09-03 20:30:24,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:30:24,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-09-03 20:30:24,920 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-03 20:30:24,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-03 20:30:24,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2019-09-03 20:30:24,921 INFO L87 Difference]: Start difference. First operand 154 states and 170 transitions. Second operand 36 states. [2019-09-03 20:30:26,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:30:26,570 INFO L93 Difference]: Finished difference Result 163 states and 181 transitions. [2019-09-03 20:30:26,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-03 20:30:26,570 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 217 [2019-09-03 20:30:26,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:30:26,572 INFO L225 Difference]: With dead ends: 163 [2019-09-03 20:30:26,572 INFO L226 Difference]: Without dead ends: 157 [2019-09-03 20:30:26,573 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2019-09-03 20:30:26,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-09-03 20:30:26,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-09-03 20:30:26,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-09-03 20:30:26,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 174 transitions. [2019-09-03 20:30:26,618 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 174 transitions. Word has length 217 [2019-09-03 20:30:26,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:30:26,619 INFO L475 AbstractCegarLoop]: Abstraction has 157 states and 174 transitions. [2019-09-03 20:30:26,619 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-03 20:30:26,620 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 174 transitions. [2019-09-03 20:30:26,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-09-03 20:30:26,622 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:30:26,622 INFO L399 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:30:26,623 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:30:26,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:30:26,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1190827227, now seen corresponding path program 29 times [2019-09-03 20:30:26,625 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:30:26,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:30:26,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:30:26,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:30:26,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:30:26,651 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:30:26,651 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:30:26,652 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:30:26,684 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1