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/loop-new/gauss_sum.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 19:56:20,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 19:56:20,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 19:56:20,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-03 19:56:20,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 19:56:20,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 19:56:20,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 19:56:20,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 19:56:20,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 19:56:20,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 19:56:20,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 19:56:20,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 19:56:20,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 19:56:20,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 19:56:20,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 19:56:20,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 19:56:20,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 19:56:20,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 19:56:20,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 19:56:20,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 19:56:20,705 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 19:56:20,719 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 19:56:20,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 19:56:20,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 19:56:20,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 19:56:20,721 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 19:56:20,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 19:56:20,721 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 19:56:20,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 19:56:20,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 19:56:20,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 19:56:20,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 19:56:20,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 19:56:20,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 19:56:20,723 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 19:56:20,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 19:56:20,723 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 19:56:20,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 19:56:20,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 19:56:20,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 19:56:20,724 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 19:56:20,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 19:56:20,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 19:56:20,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 19:56:20,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 19:56:20,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 19:56:20,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 19:56:20,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 19:56:20,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 19:56:20,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 19:56:20,756 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 19:56:20,772 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 19:56:20,776 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 19:56:20,778 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 19:56:20,778 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 19:56:20,779 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-09-03 19:56:20,854 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/657540a03/c7ef92a528124888858475f47fec18a6/FLAG32e717457 [2019-09-03 19:56:21,271 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 19:56:21,272 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-09-03 19:56:21,279 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/657540a03/c7ef92a528124888858475f47fec18a6/FLAG32e717457 [2019-09-03 19:56:21,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/657540a03/c7ef92a528124888858475f47fec18a6 [2019-09-03 19:56:21,675 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 19:56:21,676 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 19:56:21,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 19:56:21,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 19:56:21,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 19:56:21,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:56:21" (1/1) ... [2019-09-03 19:56:21,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22725a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:56:21, skipping insertion in model container [2019-09-03 19:56:21,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:56:21" (1/1) ... [2019-09-03 19:56:21,692 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 19:56:21,711 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 19:56:21,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:56:21,963 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 19:56:21,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:56:22,006 INFO L192 MainTranslator]: Completed translation [2019-09-03 19:56:22,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:56:22 WrapperNode [2019-09-03 19:56:22,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 19:56:22,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 19:56:22,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 19:56:22,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 19:56:22,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:56:22" (1/1) ... [2019-09-03 19:56:22,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:56:22" (1/1) ... [2019-09-03 19:56:22,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:56:22" (1/1) ... [2019-09-03 19:56:22,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:56:22" (1/1) ... [2019-09-03 19:56:22,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:56:22" (1/1) ... [2019-09-03 19:56:22,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:56:22" (1/1) ... [2019-09-03 19:56:22,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:56:22" (1/1) ... [2019-09-03 19:56:22,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 19:56:22,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 19:56:22,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 19:56:22,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 19:56:22,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:56:22" (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 19:56:22,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 19:56:22,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 19:56:22,213 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 19:56:22,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 19:56:22,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 19:56:22,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 19:56:22,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 19:56:22,214 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 19:56:22,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 19:56:22,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 19:56:22,392 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 19:56:22,392 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-03 19:56:22,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:56:22 BoogieIcfgContainer [2019-09-03 19:56:22,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 19:56:22,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 19:56:22,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 19:56:22,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 19:56:22,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 07:56:21" (1/3) ... [2019-09-03 19:56:22,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1250de64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:56:22, skipping insertion in model container [2019-09-03 19:56:22,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:56:22" (2/3) ... [2019-09-03 19:56:22,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1250de64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:56:22, skipping insertion in model container [2019-09-03 19:56:22,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:56:22" (3/3) ... [2019-09-03 19:56:22,402 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+cfa-reducer.c [2019-09-03 19:56:22,412 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 19:56:22,419 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 19:56:22,435 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 19:56:22,465 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 19:56:22,466 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 19:56:22,466 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 19:56:22,466 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 19:56:22,466 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 19:56:22,467 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 19:56:22,467 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 19:56:22,467 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 19:56:22,467 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 19:56:22,485 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-09-03 19:56:22,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-03 19:56:22,491 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:22,492 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:22,494 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:22,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:22,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-09-03 19:56:22,501 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:22,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:22,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:22,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:56:22,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:22,573 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:22,574 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:22,574 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 19:56:22,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:56:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:56:22,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-03 19:56:22,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:22,679 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 19:56:22,688 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:56:22,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-03 19:56:22,714 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-03 19:56:22,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-03 19:56:22,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-03 19:56:22,746 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-09-03 19:56:22,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:22,840 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-09-03 19:56:22,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-03 19:56:22,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-09-03 19:56:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:22,851 INFO L225 Difference]: With dead ends: 26 [2019-09-03 19:56:22,851 INFO L226 Difference]: Without dead ends: 13 [2019-09-03 19:56:22,855 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-03 19:56:22,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-03 19:56:22,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-03 19:56:22,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-03 19:56:22,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-03 19:56:22,887 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-03 19:56:22,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:22,888 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-03 19:56:22,888 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-03 19:56:22,888 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-03 19:56:22,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-03 19:56:22,889 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:22,889 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:22,890 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:22,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:22,890 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-09-03 19:56:22,891 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:22,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:22,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:22,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:56:22,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:22,902 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:22,902 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:22,902 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 19:56:22,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:56:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:56:22,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 19:56:22,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:23,002 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:23,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:23,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-03 19:56:23,039 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 19:56:23,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 19:56:23,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 19:56:23,041 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-09-03 19:56:23,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:23,109 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-09-03 19:56:23,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 19:56:23,110 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-09-03 19:56:23,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:23,111 INFO L225 Difference]: With dead ends: 17 [2019-09-03 19:56:23,111 INFO L226 Difference]: Without dead ends: 14 [2019-09-03 19:56:23,113 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:56:23,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-03 19:56:23,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-03 19:56:23,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-03 19:56:23,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-03 19:56:23,122 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-03 19:56:23,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:23,123 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-03 19:56:23,123 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 19:56:23,124 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-03 19:56:23,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-03 19:56:23,125 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:23,125 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:23,127 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:23,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:23,127 INFO L82 PathProgramCache]: Analyzing trace with hash 486647847, now seen corresponding path program 2 times [2019-09-03 19:56:23,127 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:23,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:23,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:23,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:56:23,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:23,156 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:23,156 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:23,157 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 19:56:23,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:56:23,188 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:56:23,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:23,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 19:56:23,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:23,233 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:23,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:23,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-03 19:56:23,260 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 19:56:23,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 19:56:23,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-03 19:56:23,261 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2019-09-03 19:56:23,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:23,319 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-09-03 19:56:23,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 19:56:23,319 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-09-03 19:56:23,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:23,320 INFO L225 Difference]: With dead ends: 18 [2019-09-03 19:56:23,320 INFO L226 Difference]: Without dead ends: 15 [2019-09-03 19:56:23,321 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:56:23,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-03 19:56:23,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-03 19:56:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-03 19:56:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-09-03 19:56:23,325 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-09-03 19:56:23,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:23,326 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-09-03 19:56:23,326 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 19:56:23,326 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-09-03 19:56:23,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-03 19:56:23,326 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:23,326 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:23,327 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:23,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:23,327 INFO L82 PathProgramCache]: Analyzing trace with hash -2093848400, now seen corresponding path program 3 times [2019-09-03 19:56:23,327 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:23,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:23,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:23,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:23,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:23,345 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:23,345 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:23,345 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) [2019-09-03 19:56:23,369 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:23,386 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-03 19:56:23,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:23,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-03 19:56:23,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:23,459 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:23,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:23,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-03 19:56:23,483 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 19:56:23,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 19:56:23,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:56:23,484 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2019-09-03 19:56:23,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:23,552 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-09-03 19:56:23,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 19:56:23,553 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-09-03 19:56:23,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:23,554 INFO L225 Difference]: With dead ends: 19 [2019-09-03 19:56:23,554 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 19:56:23,554 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-03 19:56:23,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 19:56:23,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-03 19:56:23,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 19:56:23,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-03 19:56:23,559 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-09-03 19:56:23,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:23,560 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-03 19:56:23,560 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 19:56:23,560 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-03 19:56:23,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-03 19:56:23,561 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:23,561 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:23,561 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:23,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:23,562 INFO L82 PathProgramCache]: Analyzing trace with hash -484853433, now seen corresponding path program 4 times [2019-09-03 19:56:23,562 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:23,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:23,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:23,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:23,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:23,574 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:23,574 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:23,574 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 19:56:23,592 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:23,652 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:56:23,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:23,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-03 19:56:23,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:23,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:23,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:23,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-03 19:56:23,757 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 19:56:23,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 19:56:23,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-09-03 19:56:23,758 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2019-09-03 19:56:23,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:23,836 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-09-03 19:56:23,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 19:56:23,837 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-09-03 19:56:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:23,837 INFO L225 Difference]: With dead ends: 20 [2019-09-03 19:56:23,837 INFO L226 Difference]: Without dead ends: 17 [2019-09-03 19:56:23,838 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-09-03 19:56:23,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-03 19:56:23,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-03 19:56:23,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-03 19:56:23,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-09-03 19:56:23,845 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-09-03 19:56:23,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:23,845 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-09-03 19:56:23,845 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 19:56:23,845 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-09-03 19:56:23,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 19:56:23,848 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:23,848 INFO L399 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:23,848 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:23,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:23,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2145617008, now seen corresponding path program 5 times [2019-09-03 19:56:23,849 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:23,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:23,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:23,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:23,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:23,859 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:23,859 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:23,859 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 19:56:23,887 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:56:23,905 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-03 19:56:23,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:23,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-03 19:56:23,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:23,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:24,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:24,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-03 19:56:24,007 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 19:56:24,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 19:56:24,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-09-03 19:56:24,008 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2019-09-03 19:56:24,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:24,151 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-09-03 19:56:24,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 19:56:24,152 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-09-03 19:56:24,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:24,153 INFO L225 Difference]: With dead ends: 21 [2019-09-03 19:56:24,153 INFO L226 Difference]: Without dead ends: 18 [2019-09-03 19:56:24,153 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-03 19:56:24,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-03 19:56:24,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-03 19:56:24,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-03 19:56:24,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-09-03 19:56:24,158 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-09-03 19:56:24,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:24,158 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-09-03 19:56:24,158 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 19:56:24,159 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-09-03 19:56:24,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-03 19:56:24,159 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:24,159 INFO L399 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:24,160 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:24,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:24,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2089680281, now seen corresponding path program 6 times [2019-09-03 19:56:24,160 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:24,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:24,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:24,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:24,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:24,171 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:24,172 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:24,172 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:24,189 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 19:56:24,208 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-09-03 19:56:24,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:24,210 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-03 19:56:24,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:24,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:24,329 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:24,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:24,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 19:56:24,334 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 19:56:24,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 19:56:24,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-09-03 19:56:24,334 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2019-09-03 19:56:24,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:24,431 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-09-03 19:56:24,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 19:56:24,432 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-09-03 19:56:24,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:24,432 INFO L225 Difference]: With dead ends: 22 [2019-09-03 19:56:24,433 INFO L226 Difference]: Without dead ends: 19 [2019-09-03 19:56:24,434 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-09-03 19:56:24,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-03 19:56:24,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-09-03 19:56:24,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-09-03 19:56:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-09-03 19:56:24,441 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-09-03 19:56:24,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:24,442 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-09-03 19:56:24,442 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 19:56:24,443 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-09-03 19:56:24,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-03 19:56:24,443 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:24,444 INFO L399 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:24,444 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:24,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:24,444 INFO L82 PathProgramCache]: Analyzing trace with hash -355641744, now seen corresponding path program 7 times [2019-09-03 19:56:24,445 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:24,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:24,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:24,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:24,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:24,470 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:24,470 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:24,470 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) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:24,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:56:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:56:24,505 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-03 19:56:24,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:24,668 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:24,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:24,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-03 19:56:24,690 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 19:56:24,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 19:56:24,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-09-03 19:56:24,691 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2019-09-03 19:56:24,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:24,807 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-09-03 19:56:24,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 19:56:24,808 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-09-03 19:56:24,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:24,809 INFO L225 Difference]: With dead ends: 23 [2019-09-03 19:56:24,809 INFO L226 Difference]: Without dead ends: 20 [2019-09-03 19:56:24,809 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-09-03 19:56:24,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-03 19:56:24,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-03 19:56:24,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-03 19:56:24,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-03 19:56:24,815 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-09-03 19:56:24,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:24,815 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-03 19:56:24,815 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 19:56:24,815 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-03 19:56:24,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-03 19:56:24,816 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:24,816 INFO L399 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:24,817 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:24,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:24,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1859945351, now seen corresponding path program 8 times [2019-09-03 19:56:24,817 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:24,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:24,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:24,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:56:24,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:24,829 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:24,829 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:24,829 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 19:56:24,848 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:56:24,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:56:24,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:24,869 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-03 19:56:24,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:25,015 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:25,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:25,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-03 19:56:25,037 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-03 19:56:25,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-03 19:56:25,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-09-03 19:56:25,038 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2019-09-03 19:56:25,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:25,188 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-09-03 19:56:25,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-03 19:56:25,188 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-09-03 19:56:25,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:25,189 INFO L225 Difference]: With dead ends: 24 [2019-09-03 19:56:25,189 INFO L226 Difference]: Without dead ends: 21 [2019-09-03 19:56:25,190 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-09-03 19:56:25,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-03 19:56:25,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-03 19:56:25,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-03 19:56:25,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-09-03 19:56:25,195 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-09-03 19:56:25,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:25,195 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-09-03 19:56:25,195 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-03 19:56:25,195 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-09-03 19:56:25,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-03 19:56:25,196 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:25,196 INFO L399 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:25,196 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:25,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:25,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1823668560, now seen corresponding path program 9 times [2019-09-03 19:56:25,197 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:25,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:25,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:25,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:25,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:25,207 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:25,208 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:25,208 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) [2019-09-03 19:56:25,224 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:25,250 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-03 19:56:25,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:25,252 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-03 19:56:25,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:25,389 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:25,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:25,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-03 19:56:25,415 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 19:56:25,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 19:56:25,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-09-03 19:56:25,416 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2019-09-03 19:56:25,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:25,537 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-09-03 19:56:25,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 19:56:25,538 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-09-03 19:56:25,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:25,538 INFO L225 Difference]: With dead ends: 25 [2019-09-03 19:56:25,539 INFO L226 Difference]: Without dead ends: 22 [2019-09-03 19:56:25,539 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-09-03 19:56:25,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-03 19:56:25,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-03 19:56:25,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-03 19:56:25,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-09-03 19:56:25,544 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-09-03 19:56:25,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:25,544 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-09-03 19:56:25,544 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 19:56:25,544 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-09-03 19:56:25,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-03 19:56:25,545 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:25,545 INFO L399 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:25,545 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:25,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:25,546 INFO L82 PathProgramCache]: Analyzing trace with hash 699088039, now seen corresponding path program 10 times [2019-09-03 19:56:25,546 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:25,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:25,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:25,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:25,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:25,556 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:25,557 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:25,557 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:25,571 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:56:25,655 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:56:25,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:25,657 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-03 19:56:25,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:25,804 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:25,827 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:25,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-03 19:56:25,828 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 19:56:25,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 19:56:25,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-09-03 19:56:25,829 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2019-09-03 19:56:25,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:25,960 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-09-03 19:56:25,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 19:56:25,961 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-09-03 19:56:25,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:25,962 INFO L225 Difference]: With dead ends: 26 [2019-09-03 19:56:25,962 INFO L226 Difference]: Without dead ends: 23 [2019-09-03 19:56:25,963 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-09-03 19:56:25,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-03 19:56:25,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-03 19:56:25,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-03 19:56:25,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-09-03 19:56:25,968 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-09-03 19:56:25,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:25,968 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-09-03 19:56:25,968 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 19:56:25,968 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-09-03 19:56:25,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-03 19:56:25,969 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:25,969 INFO L399 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:25,969 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:25,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:25,970 INFO L82 PathProgramCache]: Analyzing trace with hash 196830256, now seen corresponding path program 11 times [2019-09-03 19:56:25,970 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:25,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:25,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:25,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:25,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:25,985 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:25,985 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:25,985 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 19:56:26,003 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:26,027 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-03 19:56:26,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:26,029 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 55 conjunts are in the unsatisfiable core [2019-09-03 19:56:26,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:26,189 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:26,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:26,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-03 19:56:26,214 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 19:56:26,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 19:56:26,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-09-03 19:56:26,214 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2019-09-03 19:56:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:26,400 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-09-03 19:56:26,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 19:56:26,401 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2019-09-03 19:56:26,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:26,402 INFO L225 Difference]: With dead ends: 27 [2019-09-03 19:56:26,402 INFO L226 Difference]: Without dead ends: 24 [2019-09-03 19:56:26,403 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-09-03 19:56:26,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-03 19:56:26,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-03 19:56:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-03 19:56:26,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-09-03 19:56:26,408 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-09-03 19:56:26,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:26,408 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-09-03 19:56:26,408 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 19:56:26,408 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-09-03 19:56:26,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-03 19:56:26,409 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:26,409 INFO L399 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:26,409 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:26,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:26,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1806708167, now seen corresponding path program 12 times [2019-09-03 19:56:26,410 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:26,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:26,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:26,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:26,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:26,419 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:26,419 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:26,419 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) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:26,436 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 19:56:26,459 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-03 19:56:26,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:26,461 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2019-09-03 19:56:26,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:26,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:26,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:26,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-03 19:56:26,714 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 19:56:26,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 19:56:26,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-09-03 19:56:26,715 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-09-03 19:56:27,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:27,020 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-09-03 19:56:27,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-03 19:56:27,020 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-09-03 19:56:27,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:27,021 INFO L225 Difference]: With dead ends: 28 [2019-09-03 19:56:27,021 INFO L226 Difference]: Without dead ends: 25 [2019-09-03 19:56:27,021 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-09-03 19:56:27,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-03 19:56:27,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-09-03 19:56:27,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-03 19:56:27,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-09-03 19:56:27,026 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-09-03 19:56:27,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:27,026 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-09-03 19:56:27,026 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 19:56:27,026 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-09-03 19:56:27,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-03 19:56:27,027 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:27,027 INFO L399 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:27,027 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:27,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:27,028 INFO L82 PathProgramCache]: Analyzing trace with hash 173315856, now seen corresponding path program 13 times [2019-09-03 19:56:27,028 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:27,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:27,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:27,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:27,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:27,038 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:27,039 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:27,039 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) [2019-09-03 19:56:27,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:56:27,090 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 63 conjunts are in the unsatisfiable core [2019-09-03 19:56:27,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:27,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:27,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:27,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-03 19:56:27,296 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-03 19:56:27,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-03 19:56:27,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-09-03 19:56:27,297 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2019-09-03 19:56:27,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:27,491 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-09-03 19:56:27,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 19:56:27,492 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-09-03 19:56:27,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:27,492 INFO L225 Difference]: With dead ends: 29 [2019-09-03 19:56:27,493 INFO L226 Difference]: Without dead ends: 26 [2019-09-03 19:56:27,493 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-09-03 19:56:27,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-03 19:56:27,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-09-03 19:56:27,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-03 19:56:27,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-09-03 19:56:27,499 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-09-03 19:56:27,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:27,499 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-09-03 19:56:27,499 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-03 19:56:27,499 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-09-03 19:56:27,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-03 19:56:27,500 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:27,500 INFO L399 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:27,501 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:27,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:27,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1077761767, now seen corresponding path program 14 times [2019-09-03 19:56:27,501 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:27,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:27,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:27,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:56:27,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:27,510 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:27,510 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:27,510 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 19:56:27,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:56:27,556 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:56:27,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:27,558 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 67 conjunts are in the unsatisfiable core [2019-09-03 19:56:27,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:27,792 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:27,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:27,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-03 19:56:27,829 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-03 19:56:27,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-03 19:56:27,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-09-03 19:56:27,830 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2019-09-03 19:56:28,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:28,127 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-09-03 19:56:28,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-03 19:56:28,128 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-09-03 19:56:28,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:28,129 INFO L225 Difference]: With dead ends: 30 [2019-09-03 19:56:28,129 INFO L226 Difference]: Without dead ends: 27 [2019-09-03 19:56:28,130 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2019-09-03 19:56:28,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-03 19:56:28,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-03 19:56:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-03 19:56:28,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-09-03 19:56:28,143 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-09-03 19:56:28,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:28,144 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-09-03 19:56:28,144 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-03 19:56:28,144 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-09-03 19:56:28,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-03 19:56:28,145 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:28,145 INFO L399 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:28,146 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:28,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:28,146 INFO L82 PathProgramCache]: Analyzing trace with hash -949186064, now seen corresponding path program 15 times [2019-09-03 19:56:28,146 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:28,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:28,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:28,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:28,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:28,156 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:28,156 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:28,157 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) [2019-09-03 19:56:28,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:28,278 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-03 19:56:28,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:28,281 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 71 conjunts are in the unsatisfiable core [2019-09-03 19:56:28,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:28,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:28,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:28,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-03 19:56:28,618 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 19:56:28,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 19:56:28,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-09-03 19:56:28,619 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2019-09-03 19:56:28,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:28,946 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-09-03 19:56:28,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-03 19:56:28,947 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2019-09-03 19:56:28,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:28,948 INFO L225 Difference]: With dead ends: 31 [2019-09-03 19:56:28,948 INFO L226 Difference]: Without dead ends: 28 [2019-09-03 19:56:28,949 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2019-09-03 19:56:28,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-03 19:56:28,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-03 19:56:28,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-03 19:56:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-09-03 19:56:28,955 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-09-03 19:56:28,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:28,955 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-09-03 19:56:28,955 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 19:56:28,955 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-09-03 19:56:28,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-03 19:56:28,956 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:28,956 INFO L399 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:28,957 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:28,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:28,957 INFO L82 PathProgramCache]: Analyzing trace with hash 639940615, now seen corresponding path program 16 times [2019-09-03 19:56:28,957 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:28,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:28,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:28,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:28,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:28,985 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:28,985 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:28,985 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:29,007 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:56:29,224 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:56:29,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:29,226 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 75 conjunts are in the unsatisfiable core [2019-09-03 19:56:29,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:29,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:29,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:29,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-03 19:56:29,492 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 19:56:29,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 19:56:29,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-09-03 19:56:29,493 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-09-03 19:56:29,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:29,741 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-09-03 19:56:29,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 19:56:29,742 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-09-03 19:56:29,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:29,742 INFO L225 Difference]: With dead ends: 32 [2019-09-03 19:56:29,742 INFO L226 Difference]: Without dead ends: 29 [2019-09-03 19:56:29,743 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-09-03 19:56:29,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-03 19:56:29,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-09-03 19:56:29,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-03 19:56:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-09-03 19:56:29,748 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-09-03 19:56:29,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:29,748 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-09-03 19:56:29,749 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-03 19:56:29,749 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-09-03 19:56:29,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-03 19:56:29,749 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:29,749 INFO L399 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:29,750 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:29,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:29,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1636739888, now seen corresponding path program 17 times [2019-09-03 19:56:29,750 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:29,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:29,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:29,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:29,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:29,759 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:29,759 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:29,759 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 19:56:29,775 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:56:29,805 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-03 19:56:29,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:29,806 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 79 conjunts are in the unsatisfiable core [2019-09-03 19:56:29,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:30,077 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:30,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:30,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-03 19:56:30,113 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-03 19:56:30,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-03 19:56:30,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2019-09-03 19:56:30,114 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 21 states. [2019-09-03 19:56:30,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:30,443 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-09-03 19:56:30,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-03 19:56:30,444 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2019-09-03 19:56:30,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:30,444 INFO L225 Difference]: With dead ends: 33 [2019-09-03 19:56:30,444 INFO L226 Difference]: Without dead ends: 30 [2019-09-03 19:56:30,445 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-09-03 19:56:30,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-03 19:56:30,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-03 19:56:30,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-03 19:56:30,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-09-03 19:56:30,452 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-09-03 19:56:30,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:30,453 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-09-03 19:56:30,453 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-03 19:56:30,453 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-09-03 19:56:30,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-03 19:56:30,453 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:30,453 INFO L399 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:30,454 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:30,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:30,456 INFO L82 PathProgramCache]: Analyzing trace with hash 800608551, now seen corresponding path program 18 times [2019-09-03 19:56:30,456 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:30,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:30,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:30,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:30,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:30,478 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:30,478 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:30,479 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 19:56:30,514 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:30,551 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-03 19:56:30,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:30,553 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 83 conjunts are in the unsatisfiable core [2019-09-03 19:56:30,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:30,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:30,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:30,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-03 19:56:30,893 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-03 19:56:30,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-03 19:56:30,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-09-03 19:56:30,894 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2019-09-03 19:56:31,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:31,249 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-09-03 19:56:31,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 19:56:31,249 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2019-09-03 19:56:31,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:31,250 INFO L225 Difference]: With dead ends: 34 [2019-09-03 19:56:31,250 INFO L226 Difference]: Without dead ends: 31 [2019-09-03 19:56:31,250 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-09-03 19:56:31,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-03 19:56:31,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-09-03 19:56:31,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-03 19:56:31,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-09-03 19:56:31,256 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-09-03 19:56:31,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:31,256 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-09-03 19:56:31,256 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-03 19:56:31,257 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-09-03 19:56:31,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-03 19:56:31,257 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:31,257 INFO L399 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:31,258 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:31,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:31,258 INFO L82 PathProgramCache]: Analyzing trace with hash -951001168, now seen corresponding path program 19 times [2019-09-03 19:56:31,258 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:31,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:31,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:31,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:31,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:31,267 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:31,267 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:31,267 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 19:56:31,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:56:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:56:31,319 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 87 conjunts are in the unsatisfiable core [2019-09-03 19:56:31,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:31,649 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:31,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:31,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-03 19:56:31,686 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 19:56:31,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 19:56:31,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-09-03 19:56:31,687 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2019-09-03 19:56:32,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:32,087 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-09-03 19:56:32,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-03 19:56:32,087 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-09-03 19:56:32,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:32,088 INFO L225 Difference]: With dead ends: 35 [2019-09-03 19:56:32,088 INFO L226 Difference]: Without dead ends: 32 [2019-09-03 19:56:32,088 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-09-03 19:56:32,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-03 19:56:32,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-09-03 19:56:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-03 19:56:32,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-09-03 19:56:32,094 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-09-03 19:56:32,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:32,094 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-09-03 19:56:32,094 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 19:56:32,094 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-09-03 19:56:32,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-03 19:56:32,095 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:32,095 INFO L399 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:32,095 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:32,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:32,096 INFO L82 PathProgramCache]: Analyzing trace with hash 583672391, now seen corresponding path program 20 times [2019-09-03 19:56:32,096 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:32,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:32,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:32,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:56:32,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:32,105 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:32,105 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:32,105 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 19:56:32,127 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:56:32,161 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:56:32,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:32,163 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 91 conjunts are in the unsatisfiable core [2019-09-03 19:56:32,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:32,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:32,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:32,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-03 19:56:32,567 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-03 19:56:32,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-03 19:56:32,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-09-03 19:56:32,569 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2019-09-03 19:56:33,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:33,005 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-09-03 19:56:33,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-03 19:56:33,011 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-09-03 19:56:33,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:33,012 INFO L225 Difference]: With dead ends: 36 [2019-09-03 19:56:33,012 INFO L226 Difference]: Without dead ends: 33 [2019-09-03 19:56:33,013 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2019-09-03 19:56:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-03 19:56:33,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-09-03 19:56:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-03 19:56:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-09-03 19:56:33,017 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-09-03 19:56:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:33,018 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-09-03 19:56:33,018 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-03 19:56:33,018 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-09-03 19:56:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-03 19:56:33,018 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:33,018 INFO L399 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:33,019 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:33,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:33,019 INFO L82 PathProgramCache]: Analyzing trace with hash 913912464, now seen corresponding path program 21 times [2019-09-03 19:56:33,019 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:33,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:33,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:33,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:33,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:33,027 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:33,027 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:33,027 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) [2019-09-03 19:56:33,042 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:33,166 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-03 19:56:33,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:33,168 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 95 conjunts are in the unsatisfiable core [2019-09-03 19:56:33,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:33,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:33,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:33,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-03 19:56:33,611 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-03 19:56:33,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-03 19:56:33,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-09-03 19:56:33,612 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2019-09-03 19:56:34,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:34,035 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-09-03 19:56:34,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-03 19:56:34,036 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-09-03 19:56:34,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:34,037 INFO L225 Difference]: With dead ends: 37 [2019-09-03 19:56:34,037 INFO L226 Difference]: Without dead ends: 34 [2019-09-03 19:56:34,037 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2019-09-03 19:56:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-03 19:56:34,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-09-03 19:56:34,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-03 19:56:34,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-09-03 19:56:34,043 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-09-03 19:56:34,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:34,043 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-09-03 19:56:34,043 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-03 19:56:34,044 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-09-03 19:56:34,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-03 19:56:34,044 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:34,044 INFO L399 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:34,044 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:34,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:34,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1733547161, now seen corresponding path program 22 times [2019-09-03 19:56:34,045 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:34,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:34,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:34,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:34,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:34,053 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:34,053 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:34,053 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 19:56:34,088 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:56:34,280 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:56:34,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:34,282 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 99 conjunts are in the unsatisfiable core [2019-09-03 19:56:34,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:34,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:34,666 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:34,670 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:34,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-09-03 19:56:34,671 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-03 19:56:34,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-03 19:56:34,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-09-03 19:56:34,671 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2019-09-03 19:56:35,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:35,163 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-09-03 19:56:35,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-03 19:56:35,163 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2019-09-03 19:56:35,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:35,164 INFO L225 Difference]: With dead ends: 38 [2019-09-03 19:56:35,164 INFO L226 Difference]: Without dead ends: 35 [2019-09-03 19:56:35,165 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-09-03 19:56:35,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-03 19:56:35,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-09-03 19:56:35,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-03 19:56:35,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-09-03 19:56:35,170 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-09-03 19:56:35,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:35,171 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-09-03 19:56:35,171 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-03 19:56:35,171 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-09-03 19:56:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-03 19:56:35,171 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:35,172 INFO L399 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:35,172 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:35,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:35,172 INFO L82 PathProgramCache]: Analyzing trace with hash 2094550384, now seen corresponding path program 23 times [2019-09-03 19:56:35,172 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:35,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:35,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:35,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:35,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:35,180 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:35,180 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:35,180 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) [2019-09-03 19:56:35,198 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:35,237 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-03 19:56:35,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:35,239 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 103 conjunts are in the unsatisfiable core [2019-09-03 19:56:35,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:35,664 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:35,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:35,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-09-03 19:56:35,702 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-03 19:56:35,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-03 19:56:35,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-09-03 19:56:35,702 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2019-09-03 19:56:36,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:36,224 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-09-03 19:56:36,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-03 19:56:36,224 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2019-09-03 19:56:36,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:36,224 INFO L225 Difference]: With dead ends: 39 [2019-09-03 19:56:36,225 INFO L226 Difference]: Without dead ends: 36 [2019-09-03 19:56:36,225 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-09-03 19:56:36,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-03 19:56:36,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-03 19:56:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-03 19:56:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-09-03 19:56:36,229 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-09-03 19:56:36,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:36,229 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-09-03 19:56:36,229 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-03 19:56:36,229 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-09-03 19:56:36,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-03 19:56:36,230 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:36,230 INFO L399 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:36,230 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:36,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:36,230 INFO L82 PathProgramCache]: Analyzing trace with hash 506489991, now seen corresponding path program 24 times [2019-09-03 19:56:36,230 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:36,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:36,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:36,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:36,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:36,240 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:36,241 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:36,241 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 19:56:36,257 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:36,346 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-03 19:56:36,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:36,350 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 107 conjunts are in the unsatisfiable core [2019-09-03 19:56:36,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:36,778 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:36,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:36,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-09-03 19:56:36,815 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-03 19:56:36,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-03 19:56:36,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-09-03 19:56:36,816 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2019-09-03 19:56:37,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:37,425 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-09-03 19:56:37,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-03 19:56:37,425 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2019-09-03 19:56:37,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:37,426 INFO L225 Difference]: With dead ends: 40 [2019-09-03 19:56:37,426 INFO L226 Difference]: Without dead ends: 37 [2019-09-03 19:56:37,427 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-09-03 19:56:37,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-03 19:56:37,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-09-03 19:56:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-03 19:56:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-09-03 19:56:37,432 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-09-03 19:56:37,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:37,433 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-09-03 19:56:37,433 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-03 19:56:37,433 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-09-03 19:56:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-03 19:56:37,433 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:37,433 INFO L399 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:37,434 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:37,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:37,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1478741936, now seen corresponding path program 25 times [2019-09-03 19:56:37,434 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:37,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:37,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:37,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:37,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:37,442 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:37,442 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:37,442 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 19:56:37,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:56:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:56:37,503 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 111 conjunts are in the unsatisfiable core [2019-09-03 19:56:37,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:37,978 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:38,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:38,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-09-03 19:56:38,011 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-03 19:56:38,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-03 19:56:38,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-09-03 19:56:38,012 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2019-09-03 19:56:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:38,567 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-09-03 19:56:38,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-03 19:56:38,572 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-09-03 19:56:38,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:38,572 INFO L225 Difference]: With dead ends: 41 [2019-09-03 19:56:38,573 INFO L226 Difference]: Without dead ends: 38 [2019-09-03 19:56:38,573 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-09-03 19:56:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-03 19:56:38,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-03 19:56:38,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-03 19:56:38,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-09-03 19:56:38,578 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-09-03 19:56:38,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:38,578 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-09-03 19:56:38,578 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-03 19:56:38,579 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-09-03 19:56:38,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-03 19:56:38,579 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:38,579 INFO L399 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:38,579 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:38,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:38,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1403577767, now seen corresponding path program 26 times [2019-09-03 19:56:38,580 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:38,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:38,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:38,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:56:38,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:38,590 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:38,590 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:38,590 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) [2019-09-03 19:56:38,603 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:38,645 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:56:38,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:38,648 WARN L254 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 115 conjunts are in the unsatisfiable core [2019-09-03 19:56:38,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:39,170 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:39,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:39,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-09-03 19:56:39,202 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-03 19:56:39,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-03 19:56:39,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-09-03 19:56:39,203 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2019-09-03 19:56:39,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:39,815 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-09-03 19:56:39,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-03 19:56:39,815 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2019-09-03 19:56:39,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:39,816 INFO L225 Difference]: With dead ends: 42 [2019-09-03 19:56:39,816 INFO L226 Difference]: Without dead ends: 39 [2019-09-03 19:56:39,817 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2019-09-03 19:56:39,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-03 19:56:39,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-03 19:56:39,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-03 19:56:39,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-09-03 19:56:39,822 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-09-03 19:56:39,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:39,823 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-09-03 19:56:39,823 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-03 19:56:39,823 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-09-03 19:56:39,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-03 19:56:39,823 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:39,823 INFO L399 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:39,824 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:39,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:39,824 INFO L82 PathProgramCache]: Analyzing trace with hash 561175344, now seen corresponding path program 27 times [2019-09-03 19:56:39,824 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:39,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:39,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:39,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:39,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:39,831 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:39,832 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:39,832 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) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:39,857 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:56:40,151 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-09-03 19:56:40,152 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:40,154 WARN L254 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-03 19:56:40,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:40,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:40,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:40,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-09-03 19:56:40,715 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-03 19:56:40,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-03 19:56:40,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-09-03 19:56:40,716 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2019-09-03 19:56:41,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:41,396 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-09-03 19:56:41,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-03 19:56:41,396 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2019-09-03 19:56:41,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:41,397 INFO L225 Difference]: With dead ends: 43 [2019-09-03 19:56:41,397 INFO L226 Difference]: Without dead ends: 40 [2019-09-03 19:56:41,397 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2019-09-03 19:56:41,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-03 19:56:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-09-03 19:56:41,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-03 19:56:41,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-09-03 19:56:41,402 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-09-03 19:56:41,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:41,402 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-09-03 19:56:41,403 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-03 19:56:41,403 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-09-03 19:56:41,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-03 19:56:41,403 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:41,403 INFO L399 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:41,403 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:41,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:41,404 INFO L82 PathProgramCache]: Analyzing trace with hash 216504007, now seen corresponding path program 28 times [2019-09-03 19:56:41,404 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:41,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:41,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:41,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:41,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:41,413 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:41,413 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:41,413 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) [2019-09-03 19:56:41,428 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:41,641 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:56:41,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:41,644 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 123 conjunts are in the unsatisfiable core [2019-09-03 19:56:41,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:42,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:42,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:42,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-09-03 19:56:42,308 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-03 19:56:42,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-03 19:56:42,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-09-03 19:56:42,309 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2019-09-03 19:56:43,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:43,035 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-09-03 19:56:43,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-03 19:56:43,035 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2019-09-03 19:56:43,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:43,035 INFO L225 Difference]: With dead ends: 44 [2019-09-03 19:56:43,036 INFO L226 Difference]: Without dead ends: 41 [2019-09-03 19:56:43,036 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-09-03 19:56:43,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-03 19:56:43,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-09-03 19:56:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-03 19:56:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-09-03 19:56:43,042 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-09-03 19:56:43,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:43,042 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-09-03 19:56:43,042 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-03 19:56:43,042 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-09-03 19:56:43,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-03 19:56:43,043 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:43,043 INFO L399 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:43,043 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:43,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:43,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1878372848, now seen corresponding path program 29 times [2019-09-03 19:56:43,044 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:43,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:43,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:43,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:43,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:43,057 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:43,057 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:43,057 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:56:43,072 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:56:43,126 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-09-03 19:56:43,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:43,129 WARN L254 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 127 conjunts are in the unsatisfiable core [2019-09-03 19:56:43,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:43,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:43,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:43,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-09-03 19:56:43,734 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-03 19:56:43,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-03 19:56:43,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-09-03 19:56:43,735 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2019-09-03 19:56:44,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:44,544 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-09-03 19:56:44,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-03 19:56:44,544 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2019-09-03 19:56:44,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:44,545 INFO L225 Difference]: With dead ends: 45 [2019-09-03 19:56:44,545 INFO L226 Difference]: Without dead ends: 42 [2019-09-03 19:56:44,546 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-09-03 19:56:44,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-03 19:56:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-09-03 19:56:44,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-03 19:56:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-09-03 19:56:44,549 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-09-03 19:56:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:44,550 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-09-03 19:56:44,550 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-03 19:56:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-09-03 19:56:44,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-03 19:56:44,550 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:44,550 INFO L399 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:44,550 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:44,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:44,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1899921383, now seen corresponding path program 30 times [2019-09-03 19:56:44,551 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:44,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:44,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:44,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:44,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:44,558 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:44,558 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:44,558 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) [2019-09-03 19:56:44,575 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:44,709 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-09-03 19:56:44,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:44,712 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 131 conjunts are in the unsatisfiable core [2019-09-03 19:56:44,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:45,291 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:45,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:45,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-09-03 19:56:45,326 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-03 19:56:45,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-03 19:56:45,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-09-03 19:56:45,327 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2019-09-03 19:56:46,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:46,176 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-09-03 19:56:46,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-03 19:56:46,181 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2019-09-03 19:56:46,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:46,182 INFO L225 Difference]: With dead ends: 46 [2019-09-03 19:56:46,182 INFO L226 Difference]: Without dead ends: 43 [2019-09-03 19:56:46,183 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-09-03 19:56:46,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-03 19:56:46,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-09-03 19:56:46,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-03 19:56:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-09-03 19:56:46,188 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-09-03 19:56:46,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:46,188 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-09-03 19:56:46,188 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-03 19:56:46,189 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-09-03 19:56:46,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-03 19:56:46,189 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:46,189 INFO L399 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:46,189 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:46,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:46,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1232041744, now seen corresponding path program 31 times [2019-09-03 19:56:46,190 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:46,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:46,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:46,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:46,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:46,198 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:46,198 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:46,198 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 19:56:46,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:56:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:56:46,272 WARN L254 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 135 conjunts are in the unsatisfiable core [2019-09-03 19:56:46,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:46,903 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:56:46,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:46,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-09-03 19:56:46,952 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-03 19:56:46,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-03 19:56:46,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-09-03 19:56:46,953 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2019-09-03 19:56:47,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:47,765 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-09-03 19:56:47,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-03 19:56:47,766 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-09-03 19:56:47,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:47,766 INFO L225 Difference]: With dead ends: 47 [2019-09-03 19:56:47,767 INFO L226 Difference]: Without dead ends: 44 [2019-09-03 19:56:47,768 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-09-03 19:56:47,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-03 19:56:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-03 19:56:47,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-03 19:56:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-09-03 19:56:47,773 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-09-03 19:56:47,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:47,773 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-09-03 19:56:47,773 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-03 19:56:47,774 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-09-03 19:56:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-03 19:56:47,774 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:47,774 INFO L399 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:47,774 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:47,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:47,774 INFO L82 PathProgramCache]: Analyzing trace with hash 461349127, now seen corresponding path program 32 times [2019-09-03 19:56:47,774 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:47,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:47,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:47,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:56:47,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:47,781 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:47,782 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:47,782 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 19:56:47,795 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:56:47,843 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:56:47,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:47,845 WARN L254 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 139 conjunts are in the unsatisfiable core [2019-09-03 19:56:47,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:48,473 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:48,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:48,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-09-03 19:56:48,518 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-03 19:56:48,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-03 19:56:48,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-09-03 19:56:48,520 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2019-09-03 19:56:49,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:49,416 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-09-03 19:56:49,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-03 19:56:49,417 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2019-09-03 19:56:49,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:49,417 INFO L225 Difference]: With dead ends: 48 [2019-09-03 19:56:49,418 INFO L226 Difference]: Without dead ends: 45 [2019-09-03 19:56:49,419 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2019-09-03 19:56:49,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-03 19:56:49,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-09-03 19:56:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-03 19:56:49,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-09-03 19:56:49,424 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-09-03 19:56:49,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:49,425 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-09-03 19:56:49,425 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-03 19:56:49,425 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-09-03 19:56:49,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-03 19:56:49,425 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:49,425 INFO L399 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:49,426 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:49,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:49,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1416858576, now seen corresponding path program 33 times [2019-09-03 19:56:49,426 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:49,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:49,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:49,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:49,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:49,434 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:49,434 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:49,434 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:49,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:56:50,579 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-09-03 19:56:50,579 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:50,582 WARN L254 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 143 conjunts are in the unsatisfiable core [2019-09-03 19:56:50,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:51,281 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Exception during sending of exit command (exit): Stream closed [2019-09-03 19:56:51,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:51,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-09-03 19:56:51,341 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-03 19:56:51,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-03 19:56:51,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-09-03 19:56:51,343 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2019-09-03 19:56:52,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:52,316 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-09-03 19:56:52,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-03 19:56:52,316 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2019-09-03 19:56:52,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:52,317 INFO L225 Difference]: With dead ends: 49 [2019-09-03 19:56:52,317 INFO L226 Difference]: Without dead ends: 46 [2019-09-03 19:56:52,318 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2019-09-03 19:56:52,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-03 19:56:52,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-09-03 19:56:52,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-03 19:56:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-09-03 19:56:52,323 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-09-03 19:56:52,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:52,323 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-09-03 19:56:52,323 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-03 19:56:52,323 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-09-03 19:56:52,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-03 19:56:52,324 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:52,324 INFO L399 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:52,324 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:52,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:52,324 INFO L82 PathProgramCache]: Analyzing trace with hash 972880423, now seen corresponding path program 34 times [2019-09-03 19:56:52,324 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:52,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:52,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:52,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:52,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:52,332 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:52,332 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:52,332 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:52,346 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:56:52,628 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:56:52,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:52,630 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 147 conjunts are in the unsatisfiable core [2019-09-03 19:56:52,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:53,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:53,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:53,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-09-03 19:56:53,361 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-03 19:56:53,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-03 19:56:53,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-09-03 19:56:53,361 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2019-09-03 19:56:54,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:54,417 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-09-03 19:56:54,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-03 19:56:54,418 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2019-09-03 19:56:54,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:54,418 INFO L225 Difference]: With dead ends: 50 [2019-09-03 19:56:54,418 INFO L226 Difference]: Without dead ends: 47 [2019-09-03 19:56:54,419 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2019-09-03 19:56:54,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-03 19:56:54,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-09-03 19:56:54,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-03 19:56:54,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-09-03 19:56:54,423 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-09-03 19:56:54,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:54,423 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-09-03 19:56:54,423 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-03 19:56:54,424 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-09-03 19:56:54,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-03 19:56:54,424 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:54,424 INFO L399 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:54,424 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:54,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:54,424 INFO L82 PathProgramCache]: Analyzing trace with hash 94459568, now seen corresponding path program 35 times [2019-09-03 19:56:54,424 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:54,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:54,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:54,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:54,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:54,431 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:54,431 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:54,431 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:54,442 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:56:54,505 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-09-03 19:56:54,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:54,508 WARN L254 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 151 conjunts are in the unsatisfiable core [2019-09-03 19:56:54,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:55,228 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:55,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:55,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-09-03 19:56:55,267 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-03 19:56:55,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-03 19:56:55,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-09-03 19:56:55,268 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2019-09-03 19:56:56,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:56,376 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-09-03 19:56:56,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-03 19:56:56,377 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2019-09-03 19:56:56,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:56,377 INFO L225 Difference]: With dead ends: 51 [2019-09-03 19:56:56,377 INFO L226 Difference]: Without dead ends: 48 [2019-09-03 19:56:56,378 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2019-09-03 19:56:56,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-03 19:56:56,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-03 19:56:56,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-03 19:56:56,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-09-03 19:56:56,381 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-09-03 19:56:56,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:56,382 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-09-03 19:56:56,382 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-03 19:56:56,382 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-09-03 19:56:56,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-03 19:56:56,382 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:56,383 INFO L399 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:56,383 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:56,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:56,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1366783161, now seen corresponding path program 36 times [2019-09-03 19:56:56,383 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:56,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:56,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:56,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:56,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:56,390 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:56,391 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:56,391 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:56,403 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 19:56:56,603 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-03 19:56:56,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:56,606 WARN L254 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 155 conjunts are in the unsatisfiable core [2019-09-03 19:56:56,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:57,363 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:57,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:57,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-09-03 19:56:57,406 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-03 19:56:57,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-03 19:56:57,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-09-03 19:56:57,407 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2019-09-03 19:56:58,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:58,493 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-09-03 19:56:58,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-09-03 19:56:58,494 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2019-09-03 19:56:58,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:58,495 INFO L225 Difference]: With dead ends: 52 [2019-09-03 19:56:58,495 INFO L226 Difference]: Without dead ends: 49 [2019-09-03 19:56:58,497 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-09-03 19:56:58,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-03 19:56:58,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-09-03 19:56:58,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-03 19:56:58,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-09-03 19:56:58,501 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-09-03 19:56:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:58,501 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-09-03 19:56:58,501 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-03 19:56:58,501 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-09-03 19:56:58,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-03 19:56:58,502 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:58,502 INFO L399 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:58,502 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:58,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:58,503 INFO L82 PathProgramCache]: Analyzing trace with hash 579332496, now seen corresponding path program 37 times [2019-09-03 19:56:58,503 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:58,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:58,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:58,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:58,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:58,510 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:56:58,511 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:56:58,511 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:56:58,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:56:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:56:58,611 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 159 conjunts are in the unsatisfiable core [2019-09-03 19:56:58,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:59,567 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:56:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:59,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:56:59,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-09-03 19:56:59,608 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-03 19:56:59,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-03 19:56:59,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-09-03 19:56:59,609 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2019-09-03 19:57:00,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:57:00,745 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-09-03 19:57:00,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-03 19:57:00,746 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2019-09-03 19:57:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:57:00,746 INFO L225 Difference]: With dead ends: 53 [2019-09-03 19:57:00,747 INFO L226 Difference]: Without dead ends: 50 [2019-09-03 19:57:00,748 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-09-03 19:57:00,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-03 19:57:00,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-09-03 19:57:00,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-03 19:57:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-09-03 19:57:00,753 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-09-03 19:57:00,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:57:00,753 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-09-03 19:57:00,753 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-03 19:57:00,753 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-09-03 19:57:00,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-03 19:57:00,754 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:57:00,754 INFO L399 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:57:00,754 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:57:00,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:57:00,755 INFO L82 PathProgramCache]: Analyzing trace with hash 779375719, now seen corresponding path program 38 times [2019-09-03 19:57:00,755 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:57:00,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:57:00,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:00,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:57:00,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:00,763 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:57:00,763 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:57:00,763 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:57:00,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:57:00,850 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:57:00,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:57:00,853 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 163 conjunts are in the unsatisfiable core [2019-09-03 19:57:00,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:57:01,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:57:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:01,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:57:01,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-09-03 19:57:01,760 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-03 19:57:01,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-03 19:57:01,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-09-03 19:57:01,761 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2019-09-03 19:57:03,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:57:03,017 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-09-03 19:57:03,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-03 19:57:03,017 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2019-09-03 19:57:03,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:57:03,018 INFO L225 Difference]: With dead ends: 54 [2019-09-03 19:57:03,018 INFO L226 Difference]: Without dead ends: 51 [2019-09-03 19:57:03,020 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2019-09-03 19:57:03,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-03 19:57:03,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-03 19:57:03,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-03 19:57:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-09-03 19:57:03,026 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2019-09-03 19:57:03,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:57:03,026 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-09-03 19:57:03,027 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-03 19:57:03,027 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-09-03 19:57:03,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-03 19:57:03,027 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:57:03,027 INFO L399 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:57:03,028 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:57:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:57:03,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1609218960, now seen corresponding path program 39 times [2019-09-03 19:57:03,028 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:57:03,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:57:03,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:03,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:57:03,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:03,051 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:57:03,051 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:57:03,051 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:57:03,060 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:57:04,377 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-09-03 19:57:04,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:57:04,381 WARN L254 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 167 conjunts are in the unsatisfiable core [2019-09-03 19:57:04,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:57:05,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:57:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:05,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:57:05,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2019-09-03 19:57:05,294 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-03 19:57:05,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-03 19:57:05,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2019-09-03 19:57:05,296 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 43 states. [2019-09-03 19:57:06,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:57:06,600 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-09-03 19:57:06,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-03 19:57:06,600 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 50 [2019-09-03 19:57:06,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:57:06,601 INFO L225 Difference]: With dead ends: 55 [2019-09-03 19:57:06,602 INFO L226 Difference]: Without dead ends: 52 [2019-09-03 19:57:06,603 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2019-09-03 19:57:06,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-03 19:57:06,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-09-03 19:57:06,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-03 19:57:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-09-03 19:57:06,608 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2019-09-03 19:57:06,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:57:06,608 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-09-03 19:57:06,609 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-03 19:57:06,609 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-09-03 19:57:06,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-03 19:57:06,609 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:57:06,609 INFO L399 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:57:06,610 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:57:06,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:57:06,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1653757319, now seen corresponding path program 40 times [2019-09-03 19:57:06,610 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:57:06,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:57:06,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:06,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:57:06,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:06,618 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:57:06,618 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:57:06,618 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:57:06,642 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:57:06,986 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:57:06,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:57:06,989 WARN L254 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 171 conjunts are in the unsatisfiable core [2019-09-03 19:57:06,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:57:07,890 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:57:07,950 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:07,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:57:07,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2019-09-03 19:57:07,954 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-03 19:57:07,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-03 19:57:07,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2019-09-03 19:57:07,955 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 44 states. [2019-09-03 19:57:09,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:57:09,250 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-09-03 19:57:09,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-03 19:57:09,250 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 51 [2019-09-03 19:57:09,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:57:09,251 INFO L225 Difference]: With dead ends: 56 [2019-09-03 19:57:09,251 INFO L226 Difference]: Without dead ends: 53 [2019-09-03 19:57:09,253 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2019-09-03 19:57:09,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-03 19:57:09,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-09-03 19:57:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-03 19:57:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-09-03 19:57:09,258 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2019-09-03 19:57:09,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:57:09,258 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-09-03 19:57:09,258 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-03 19:57:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-09-03 19:57:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-03 19:57:09,259 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:57:09,259 INFO L399 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:57:09,259 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:57:09,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:57:09,260 INFO L82 PathProgramCache]: Analyzing trace with hash -273193136, now seen corresponding path program 41 times [2019-09-03 19:57:09,260 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:57:09,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:57:09,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:09,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:57:09,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:09,267 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:57:09,268 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:57:09,268 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 19:57:09,286 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:57:09,429 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-09-03 19:57:09,429 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:57:09,433 WARN L254 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 175 conjunts are in the unsatisfiable core [2019-09-03 19:57:09,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:57:10,433 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:57:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:10,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:57:10,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2019-09-03 19:57:10,482 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-03 19:57:10,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-03 19:57:10,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2019-09-03 19:57:10,483 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 45 states. [2019-09-03 19:57:11,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:57:11,845 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-09-03 19:57:11,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-09-03 19:57:11,846 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 52 [2019-09-03 19:57:11,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:57:11,846 INFO L225 Difference]: With dead ends: 57 [2019-09-03 19:57:11,847 INFO L226 Difference]: Without dead ends: 54 [2019-09-03 19:57:11,848 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2019-09-03 19:57:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-03 19:57:11,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-09-03 19:57:11,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-03 19:57:11,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-09-03 19:57:11,852 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2019-09-03 19:57:11,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:57:11,853 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-09-03 19:57:11,853 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-03 19:57:11,853 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-09-03 19:57:11,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-03 19:57:11,853 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:57:11,853 INFO L399 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:57:11,853 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:57:11,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:57:11,854 INFO L82 PathProgramCache]: Analyzing trace with hash 120884903, now seen corresponding path program 42 times [2019-09-03 19:57:11,854 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:57:11,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:57:11,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:11,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:57:11,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:11,860 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:57:11,861 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:57:11,861 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:57:11,871 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 19:57:12,427 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-09-03 19:57:12,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:57:12,431 WARN L254 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 179 conjunts are in the unsatisfiable core [2019-09-03 19:57:12,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:57:13,422 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:57:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:13,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:57:13,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2019-09-03 19:57:13,471 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-09-03 19:57:13,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-09-03 19:57:13,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2019-09-03 19:57:13,471 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 46 states. [2019-09-03 19:57:14,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:57:14,943 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2019-09-03 19:57:14,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-03 19:57:14,944 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 53 [2019-09-03 19:57:14,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:57:14,944 INFO L225 Difference]: With dead ends: 58 [2019-09-03 19:57:14,944 INFO L226 Difference]: Without dead ends: 55 [2019-09-03 19:57:14,945 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2019-09-03 19:57:14,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-03 19:57:14,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-09-03 19:57:14,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-03 19:57:14,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-09-03 19:57:14,950 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2019-09-03 19:57:14,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:57:14,950 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-09-03 19:57:14,950 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-09-03 19:57:14,951 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-09-03 19:57:14,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-03 19:57:14,951 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:57:14,951 INFO L399 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:57:14,951 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:57:14,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:57:14,951 INFO L82 PathProgramCache]: Analyzing trace with hash -547597776, now seen corresponding path program 43 times [2019-09-03 19:57:14,952 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:57:14,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:57:14,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:14,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:57:14,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:14,958 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:57:14,958 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:57:14,959 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:57:14,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:57:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:57:15,042 WARN L254 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 183 conjunts are in the unsatisfiable core [2019-09-03 19:57:15,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:57:16,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:57:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:16,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:57:16,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2019-09-03 19:57:16,174 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-03 19:57:16,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-03 19:57:16,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2019-09-03 19:57:16,175 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 47 states. [2019-09-03 19:57:17,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:57:17,766 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-09-03 19:57:17,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-09-03 19:57:17,766 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 54 [2019-09-03 19:57:17,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:57:17,767 INFO L225 Difference]: With dead ends: 59 [2019-09-03 19:57:17,767 INFO L226 Difference]: Without dead ends: 56 [2019-09-03 19:57:17,768 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2019-09-03 19:57:17,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-09-03 19:57:17,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-09-03 19:57:17,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-03 19:57:17,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-09-03 19:57:17,773 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2019-09-03 19:57:17,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:57:17,773 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-09-03 19:57:17,773 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-03 19:57:17,773 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-09-03 19:57:17,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-03 19:57:17,773 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:57:17,773 INFO L399 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:57:17,774 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:57:17,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:57:17,774 INFO L82 PathProgramCache]: Analyzing trace with hash 204275655, now seen corresponding path program 44 times [2019-09-03 19:57:17,774 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:57:17,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:57:17,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:17,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:57:17,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:17,784 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:57:17,785 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:57:17,785 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:57:17,808 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:57:17,882 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:57:17,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:57:17,885 WARN L254 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 187 conjunts are in the unsatisfiable core [2019-09-03 19:57:17,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:57:19,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:57:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:19,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:57:19,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2019-09-03 19:57:19,289 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-09-03 19:57:19,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-09-03 19:57:19,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2019-09-03 19:57:19,290 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 48 states. [2019-09-03 19:57:20,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:57:20,932 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-09-03 19:57:20,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-03 19:57:20,932 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 55 [2019-09-03 19:57:20,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:57:20,933 INFO L225 Difference]: With dead ends: 60 [2019-09-03 19:57:20,933 INFO L226 Difference]: Without dead ends: 57 [2019-09-03 19:57:20,933 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2019-09-03 19:57:20,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-03 19:57:20,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-09-03 19:57:20,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-03 19:57:20,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-09-03 19:57:20,939 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2019-09-03 19:57:20,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:57:20,939 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-09-03 19:57:20,939 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-09-03 19:57:20,939 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-09-03 19:57:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-03 19:57:20,940 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:57:20,940 INFO L399 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:57:20,940 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:57:20,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:57:20,940 INFO L82 PathProgramCache]: Analyzing trace with hash 2037515536, now seen corresponding path program 45 times [2019-09-03 19:57:20,940 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:57:20,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:57:20,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:20,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:57:20,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:20,947 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:57:20,947 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:57:20,948 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:57:20,958 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:57:23,365 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-09-03 19:57:23,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:57:23,369 WARN L254 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 191 conjunts are in the unsatisfiable core [2019-09-03 19:57:23,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:57:24,521 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:57:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:24,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:57:24,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2019-09-03 19:57:24,599 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-09-03 19:57:24,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-09-03 19:57:24,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2019-09-03 19:57:24,600 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 49 states. [2019-09-03 19:57:26,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:57:26,450 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2019-09-03 19:57:26,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-09-03 19:57:26,450 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 56 [2019-09-03 19:57:26,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:57:26,451 INFO L225 Difference]: With dead ends: 61 [2019-09-03 19:57:26,451 INFO L226 Difference]: Without dead ends: 58 [2019-09-03 19:57:26,452 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2019-09-03 19:57:26,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-03 19:57:26,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-09-03 19:57:26,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-03 19:57:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-09-03 19:57:26,457 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2019-09-03 19:57:26,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:57:26,457 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-09-03 19:57:26,457 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-09-03 19:57:26,457 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-09-03 19:57:26,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-03 19:57:26,457 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:57:26,458 INFO L399 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:57:26,458 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:57:26,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:57:26,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1261590297, now seen corresponding path program 46 times [2019-09-03 19:57:26,458 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:57:26,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:57:26,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:26,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:57:26,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:26,465 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:57:26,465 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:57:26,465 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 19:57:26,499 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:57:26,944 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:57:26,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:57:26,947 WARN L254 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 195 conjunts are in the unsatisfiable core [2019-09-03 19:57:26,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:57:28,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:57:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:28,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:57:28,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2019-09-03 19:57:28,160 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-03 19:57:28,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-03 19:57:28,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2019-09-03 19:57:28,161 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 50 states. [2019-09-03 19:57:29,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:57:29,838 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2019-09-03 19:57:29,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-09-03 19:57:29,839 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 57 [2019-09-03 19:57:29,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:57:29,840 INFO L225 Difference]: With dead ends: 62 [2019-09-03 19:57:29,840 INFO L226 Difference]: Without dead ends: 59 [2019-09-03 19:57:29,840 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2019-09-03 19:57:29,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-03 19:57:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-09-03 19:57:29,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-03 19:57:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-09-03 19:57:29,846 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2019-09-03 19:57:29,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:57:29,846 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-09-03 19:57:29,846 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-03 19:57:29,847 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-09-03 19:57:29,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-03 19:57:29,847 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:57:29,847 INFO L399 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:57:29,847 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:57:29,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:57:29,848 INFO L82 PathProgramCache]: Analyzing trace with hash -454656016, now seen corresponding path program 47 times [2019-09-03 19:57:29,848 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:57:29,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:57:29,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:29,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:57:29,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:29,855 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:57:29,855 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:57:29,856 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:57:29,868 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:57:29,977 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-09-03 19:57:29,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:57:29,980 WARN L254 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 199 conjunts are in the unsatisfiable core [2019-09-03 19:57:29,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:57:31,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:57:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:31,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:57:31,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2019-09-03 19:57:31,334 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-09-03 19:57:31,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-09-03 19:57:31,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2019-09-03 19:57:31,334 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 51 states. [2019-09-03 19:57:33,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:57:33,136 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-09-03 19:57:33,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-03 19:57:33,137 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 58 [2019-09-03 19:57:33,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:57:33,138 INFO L225 Difference]: With dead ends: 63 [2019-09-03 19:57:33,138 INFO L226 Difference]: Without dead ends: 60 [2019-09-03 19:57:33,139 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2019-09-03 19:57:33,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-03 19:57:33,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-03 19:57:33,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-03 19:57:33,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-09-03 19:57:33,146 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2019-09-03 19:57:33,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:57:33,146 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-09-03 19:57:33,146 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-09-03 19:57:33,147 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-09-03 19:57:33,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-03 19:57:33,147 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:57:33,147 INFO L399 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:57:33,147 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:57:33,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:57:33,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1209497081, now seen corresponding path program 48 times [2019-09-03 19:57:33,148 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:57:33,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:57:33,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:33,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:57:33,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:33,156 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:57:33,156 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:57:33,156 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 19:57:33,177 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:57:33,813 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-03 19:57:33,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:57:33,817 WARN L254 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 203 conjunts are in the unsatisfiable core [2019-09-03 19:57:33,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:57:35,095 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:57:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:35,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:57:35,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2019-09-03 19:57:35,149 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-09-03 19:57:35,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-09-03 19:57:35,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2019-09-03 19:57:35,150 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 52 states. [2019-09-03 19:57:37,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:57:37,017 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-09-03 19:57:37,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-09-03 19:57:37,018 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 59 [2019-09-03 19:57:37,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:57:37,019 INFO L225 Difference]: With dead ends: 64 [2019-09-03 19:57:37,019 INFO L226 Difference]: Without dead ends: 61 [2019-09-03 19:57:37,020 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2019-09-03 19:57:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-03 19:57:37,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-09-03 19:57:37,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-03 19:57:37,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-09-03 19:57:37,026 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2019-09-03 19:57:37,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:57:37,026 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-09-03 19:57:37,027 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-09-03 19:57:37,027 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-09-03 19:57:37,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-03 19:57:37,027 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:57:37,027 INFO L399 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:57:37,028 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:57:37,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:57:37,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1160233680, now seen corresponding path program 49 times [2019-09-03 19:57:37,028 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:57:37,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:57:37,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:37,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:57:37,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:37,036 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:57:37,036 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:57:37,036 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:57:37,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:57:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:57:37,143 WARN L254 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 207 conjunts are in the unsatisfiable core [2019-09-03 19:57:37,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:57:38,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:57:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:38,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:57:38,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2019-09-03 19:57:38,559 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-03 19:57:38,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-03 19:57:38,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2019-09-03 19:57:38,560 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 53 states. [2019-09-03 19:57:40,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:57:40,576 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2019-09-03 19:57:40,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-09-03 19:57:40,576 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 60 [2019-09-03 19:57:40,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:57:40,577 INFO L225 Difference]: With dead ends: 65 [2019-09-03 19:57:40,577 INFO L226 Difference]: Without dead ends: 62 [2019-09-03 19:57:40,578 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2019-09-03 19:57:40,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-03 19:57:40,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-09-03 19:57:40,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-03 19:57:40,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2019-09-03 19:57:40,584 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2019-09-03 19:57:40,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:57:40,584 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2019-09-03 19:57:40,584 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-03 19:57:40,584 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2019-09-03 19:57:40,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-03 19:57:40,585 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:57:40,585 INFO L399 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:57:40,585 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:57:40,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:57:40,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1607443239, now seen corresponding path program 50 times [2019-09-03 19:57:40,586 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:57:40,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:57:40,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:40,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:57:40,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:40,594 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:57:40,594 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:57:40,594 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 19:57:40,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:57:40,707 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:57:40,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:57:40,710 WARN L254 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 211 conjunts are in the unsatisfiable core [2019-09-03 19:57:40,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:57:42,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:57:42,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:42,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:57:42,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2019-09-03 19:57:42,115 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-03 19:57:42,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-03 19:57:42,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2019-09-03 19:57:42,116 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 54 states. [2019-09-03 19:57:44,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:57:44,078 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-09-03 19:57:44,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-03 19:57:44,078 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 61 [2019-09-03 19:57:44,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:57:44,079 INFO L225 Difference]: With dead ends: 66 [2019-09-03 19:57:44,080 INFO L226 Difference]: Without dead ends: 63 [2019-09-03 19:57:44,080 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2019-09-03 19:57:44,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-03 19:57:44,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-09-03 19:57:44,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-03 19:57:44,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2019-09-03 19:57:44,086 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2019-09-03 19:57:44,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:57:44,086 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2019-09-03 19:57:44,086 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-03 19:57:44,086 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2019-09-03 19:57:44,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-09-03 19:57:44,087 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:57:44,087 INFO L399 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:57:44,087 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:57:44,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:57:44,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1708929616, now seen corresponding path program 51 times [2019-09-03 19:57:44,087 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:57:44,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:57:44,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:44,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:57:44,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:44,095 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:57:44,095 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:57:44,096 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:57:44,105 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:57:48,180 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-09-03 19:57:48,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:57:48,185 WARN L254 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 215 conjunts are in the unsatisfiable core [2019-09-03 19:57:48,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:57:49,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:57:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:49,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:57:49,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2019-09-03 19:57:49,665 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-09-03 19:57:49,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-09-03 19:57:49,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-09-03 19:57:49,666 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 55 states. [2019-09-03 19:57:51,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:57:51,749 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2019-09-03 19:57:51,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-09-03 19:57:51,749 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 62 [2019-09-03 19:57:51,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:57:51,750 INFO L225 Difference]: With dead ends: 67 [2019-09-03 19:57:51,750 INFO L226 Difference]: Without dead ends: 64 [2019-09-03 19:57:51,751 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2019-09-03 19:57:51,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-03 19:57:51,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-09-03 19:57:51,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-03 19:57:51,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2019-09-03 19:57:51,758 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2019-09-03 19:57:51,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:57:51,758 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2019-09-03 19:57:51,758 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-09-03 19:57:51,759 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2019-09-03 19:57:51,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-03 19:57:51,759 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:57:51,759 INFO L399 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:57:51,759 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:57:51,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:57:51,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1437273017, now seen corresponding path program 52 times [2019-09-03 19:57:51,760 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:57:51,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:57:51,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:51,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:57:51,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:51,768 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:57:51,768 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:57:51,768 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:57:51,784 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:57:52,308 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:57:52,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:57:52,311 WARN L254 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 219 conjunts are in the unsatisfiable core [2019-09-03 19:57:52,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:57:53,788 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:57:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:53,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:57:53,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2019-09-03 19:57:53,845 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-09-03 19:57:53,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-09-03 19:57:53,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2019-09-03 19:57:53,845 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 56 states. [2019-09-03 19:57:56,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:57:56,052 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2019-09-03 19:57:56,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-09-03 19:57:56,052 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 63 [2019-09-03 19:57:56,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:57:56,053 INFO L225 Difference]: With dead ends: 68 [2019-09-03 19:57:56,053 INFO L226 Difference]: Without dead ends: 65 [2019-09-03 19:57:56,053 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2019-09-03 19:57:56,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-03 19:57:56,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-09-03 19:57:56,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-03 19:57:56,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2019-09-03 19:57:56,059 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2019-09-03 19:57:56,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:57:56,059 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2019-09-03 19:57:56,059 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-09-03 19:57:56,059 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2019-09-03 19:57:56,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-03 19:57:56,060 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:57:56,060 INFO L399 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:57:56,060 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:57:56,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:57:56,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1605853040, now seen corresponding path program 53 times [2019-09-03 19:57:56,061 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:57:56,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:57:56,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:56,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:57:56,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:56,069 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:57:56,069 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:57:56,069 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:57:56,083 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:57:56,244 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-09-03 19:57:56,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:57:56,248 WARN L254 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 223 conjunts are in the unsatisfiable core [2019-09-03 19:57:56,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:57:57,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:57:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:57,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:57:57,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2019-09-03 19:57:57,787 INFO L454 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-09-03 19:57:57,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-09-03 19:57:57,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2019-09-03 19:57:57,788 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 57 states. [2019-09-03 19:58:00,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:58:00,054 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2019-09-03 19:58:00,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-09-03 19:58:00,054 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 64 [2019-09-03 19:58:00,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:58:00,055 INFO L225 Difference]: With dead ends: 69 [2019-09-03 19:58:00,055 INFO L226 Difference]: Without dead ends: 66 [2019-09-03 19:58:00,055 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2019-09-03 19:58:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-03 19:58:00,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-09-03 19:58:00,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-03 19:58:00,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2019-09-03 19:58:00,062 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2019-09-03 19:58:00,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:58:00,062 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2019-09-03 19:58:00,062 INFO L476 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-09-03 19:58:00,062 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2019-09-03 19:58:00,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-03 19:58:00,062 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:58:00,062 INFO L399 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:58:00,063 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:58:00,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:58:00,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1758100839, now seen corresponding path program 54 times [2019-09-03 19:58:00,063 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:58:00,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:58:00,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:00,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:58:00,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:00,071 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:58:00,072 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:58:00,072 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 19:58:00,092 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:58:01,335 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-09-03 19:58:01,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:58:01,341 WARN L254 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 227 conjunts are in the unsatisfiable core [2019-09-03 19:58:01,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:58:02,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:58:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:58:02,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:58:02,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2019-09-03 19:58:02,937 INFO L454 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-09-03 19:58:02,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-09-03 19:58:02,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2019-09-03 19:58:02,938 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 58 states. [2019-09-03 19:58:05,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:58:05,250 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2019-09-03 19:58:05,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-09-03 19:58:05,251 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 65 [2019-09-03 19:58:05,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:58:05,251 INFO L225 Difference]: With dead ends: 70 [2019-09-03 19:58:05,251 INFO L226 Difference]: Without dead ends: 67 [2019-09-03 19:58:05,252 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2019-09-03 19:58:05,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-03 19:58:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-09-03 19:58:05,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-09-03 19:58:05,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-09-03 19:58:05,257 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2019-09-03 19:58:05,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:58:05,257 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-09-03 19:58:05,257 INFO L476 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-09-03 19:58:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-09-03 19:58:05,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-09-03 19:58:05,258 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:58:05,258 INFO L399 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:58:05,258 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:58:05,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:58:05,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1333511312, now seen corresponding path program 55 times [2019-09-03 19:58:05,259 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:58:05,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:58:05,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:05,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:58:05,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:05,267 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:58:05,267 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:58:05,267 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:58:05,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:58:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:58:05,409 WARN L254 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 231 conjunts are in the unsatisfiable core [2019-09-03 19:58:05,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:58:07,401 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:58:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:58:07,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:58:07,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2019-09-03 19:58:07,477 INFO L454 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-09-03 19:58:07,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-09-03 19:58:07,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2019-09-03 19:58:07,477 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 59 states. [2019-09-03 19:58:09,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:58:09,916 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2019-09-03 19:58:09,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-09-03 19:58:09,916 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 66 [2019-09-03 19:58:09,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:58:09,917 INFO L225 Difference]: With dead ends: 71 [2019-09-03 19:58:09,917 INFO L226 Difference]: Without dead ends: 68 [2019-09-03 19:58:09,917 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2019-09-03 19:58:09,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-03 19:58:09,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-09-03 19:58:09,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-03 19:58:09,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2019-09-03 19:58:09,924 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2019-09-03 19:58:09,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:58:09,924 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2019-09-03 19:58:09,924 INFO L476 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-09-03 19:58:09,924 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2019-09-03 19:58:09,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-03 19:58:09,925 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:58:09,925 INFO L399 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:58:09,925 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:58:09,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:58:09,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1610759815, now seen corresponding path program 56 times [2019-09-03 19:58:09,926 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:58:09,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:58:09,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:09,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:58:09,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:09,934 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:58:09,934 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:58:09,934 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:58:09,955 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:58:10,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:58:10,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:58:10,114 WARN L254 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 235 conjunts are in the unsatisfiable core [2019-09-03 19:58:10,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:58:11,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:58:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:58:11,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:58:11,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2019-09-03 19:58:11,896 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-09-03 19:58:11,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-09-03 19:58:11,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2019-09-03 19:58:11,896 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 60 states. [2019-09-03 19:58:14,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:58:14,368 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2019-09-03 19:58:14,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-09-03 19:58:14,369 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 67 [2019-09-03 19:58:14,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:58:14,370 INFO L225 Difference]: With dead ends: 72 [2019-09-03 19:58:14,370 INFO L226 Difference]: Without dead ends: 69 [2019-09-03 19:58:14,370 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2019-09-03 19:58:14,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-03 19:58:14,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-09-03 19:58:14,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-03 19:58:14,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-09-03 19:58:14,381 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2019-09-03 19:58:14,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:58:14,381 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-09-03 19:58:14,382 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-09-03 19:58:14,382 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-09-03 19:58:14,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-03 19:58:14,382 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:58:14,382 INFO L399 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:58:14,382 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:58:14,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:58:14,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1606115760, now seen corresponding path program 57 times [2019-09-03 19:58:14,383 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:58:14,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:58:14,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:14,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:58:14,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:14,395 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:58:14,395 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:58:14,395 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:58:14,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:58:21,608 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-09-03 19:58:21,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:58:21,614 WARN L254 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 239 conjunts are in the unsatisfiable core [2019-09-03 19:58:21,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:58:23,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:58:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:58:23,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:58:23,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2019-09-03 19:58:23,381 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-09-03 19:58:23,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-09-03 19:58:23,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2019-09-03 19:58:23,381 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 61 states. [2019-09-03 19:58:25,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:58:25,914 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2019-09-03 19:58:25,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-09-03 19:58:25,914 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 68 [2019-09-03 19:58:25,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:58:25,915 INFO L225 Difference]: With dead ends: 73 [2019-09-03 19:58:25,915 INFO L226 Difference]: Without dead ends: 70 [2019-09-03 19:58:25,916 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2019-09-03 19:58:25,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-03 19:58:25,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-09-03 19:58:25,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-09-03 19:58:25,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2019-09-03 19:58:25,923 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2019-09-03 19:58:25,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:58:25,924 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2019-09-03 19:58:25,924 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-09-03 19:58:25,924 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2019-09-03 19:58:25,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-03 19:58:25,924 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:58:25,924 INFO L399 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:58:25,925 INFO L418 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:58:25,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:58:25,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1749956519, now seen corresponding path program 58 times [2019-09-03 19:58:25,925 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:58:25,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:58:25,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:25,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:58:25,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:25,933 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:58:25,934 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:58:25,934 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:58:25,945 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:58:26,589 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:58:26,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:58:26,593 WARN L254 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 243 conjunts are in the unsatisfiable core [2019-09-03 19:58:26,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:58:28,345 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:58:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:58:28,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:58:28,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2019-09-03 19:58:28,410 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-03 19:58:28,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-03 19:58:28,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2019-09-03 19:58:28,411 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 62 states. [2019-09-03 19:58:31,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:58:31,095 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2019-09-03 19:58:31,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-03 19:58:31,095 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 69 [2019-09-03 19:58:31,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:58:31,096 INFO L225 Difference]: With dead ends: 74 [2019-09-03 19:58:31,096 INFO L226 Difference]: Without dead ends: 71 [2019-09-03 19:58:31,096 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2019-09-03 19:58:31,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-03 19:58:31,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-09-03 19:58:31,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-03 19:58:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2019-09-03 19:58:31,102 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2019-09-03 19:58:31,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:58:31,103 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2019-09-03 19:58:31,103 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-03 19:58:31,103 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2019-09-03 19:58:31,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-03 19:58:31,103 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:58:31,103 INFO L399 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:58:31,103 INFO L418 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:58:31,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:58:31,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1585985232, now seen corresponding path program 59 times [2019-09-03 19:58:31,104 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:58:31,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:58:31,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:31,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:58:31,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:31,111 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:58:31,111 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:58:31,112 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 19:58:31,132 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:58:31,305 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-09-03 19:58:31,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:58:31,309 WARN L254 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 247 conjunts are in the unsatisfiable core [2019-09-03 19:58:31,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:58:33,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:58:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:58:33,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:58:33,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2019-09-03 19:58:33,178 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-03 19:58:33,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-03 19:58:33,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2019-09-03 19:58:33,179 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 63 states. [2019-09-03 19:58:35,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:58:35,922 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2019-09-03 19:58:35,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-03 19:58:35,922 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 70 [2019-09-03 19:58:35,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:58:35,923 INFO L225 Difference]: With dead ends: 75 [2019-09-03 19:58:35,923 INFO L226 Difference]: Without dead ends: 72 [2019-09-03 19:58:35,924 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2019-09-03 19:58:35,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-03 19:58:35,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-09-03 19:58:35,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-03 19:58:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2019-09-03 19:58:35,931 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2019-09-03 19:58:35,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:58:35,932 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2019-09-03 19:58:35,932 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-03 19:58:35,932 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2019-09-03 19:58:35,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-03 19:58:35,932 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:58:35,933 INFO L399 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:58:35,933 INFO L418 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:58:35,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:58:35,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1920964409, now seen corresponding path program 60 times [2019-09-03 19:58:35,933 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:58:35,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:58:35,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:35,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:58:35,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:35,942 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:58:35,942 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:58:35,942 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 19:58:35,958 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:58:37,709 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-09-03 19:58:37,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:58:37,717 WARN L254 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 251 conjunts are in the unsatisfiable core [2019-09-03 19:58:37,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:58:39,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:58:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:58:39,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:58:39,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2019-09-03 19:58:39,660 INFO L454 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-09-03 19:58:39,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-09-03 19:58:39,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2019-09-03 19:58:39,661 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 64 states. [2019-09-03 19:58:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:58:42,438 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2019-09-03 19:58:42,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-09-03 19:58:42,438 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 71 [2019-09-03 19:58:42,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:58:42,439 INFO L225 Difference]: With dead ends: 76 [2019-09-03 19:58:42,439 INFO L226 Difference]: Without dead ends: 73 [2019-09-03 19:58:42,440 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2019-09-03 19:58:42,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-03 19:58:42,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-09-03 19:58:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-09-03 19:58:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-09-03 19:58:42,446 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2019-09-03 19:58:42,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:58:42,446 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-09-03 19:58:42,446 INFO L476 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-09-03 19:58:42,447 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-09-03 19:58:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-03 19:58:42,447 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:58:42,447 INFO L399 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:58:42,448 INFO L418 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:58:42,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:58:42,448 INFO L82 PathProgramCache]: Analyzing trace with hash 579582992, now seen corresponding path program 61 times [2019-09-03 19:58:42,448 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:58:42,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:58:42,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:42,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:58:42,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:42,457 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:58:42,457 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:58:42,457 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:58:42,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:58:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:58:42,636 WARN L254 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 255 conjunts are in the unsatisfiable core [2019-09-03 19:58:42,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:58:44,642 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:58:44,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:58:44,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:58:44,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2019-09-03 19:58:44,711 INFO L454 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-09-03 19:58:44,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-09-03 19:58:44,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2019-09-03 19:58:44,712 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 65 states. [2019-09-03 19:58:47,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:58:47,674 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2019-09-03 19:58:47,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-09-03 19:58:47,674 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 72 [2019-09-03 19:58:47,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:58:47,675 INFO L225 Difference]: With dead ends: 77 [2019-09-03 19:58:47,675 INFO L226 Difference]: Without dead ends: 74 [2019-09-03 19:58:47,676 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2019-09-03 19:58:47,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-09-03 19:58:47,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-09-03 19:58:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-03 19:58:47,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2019-09-03 19:58:47,682 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2019-09-03 19:58:47,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:58:47,683 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2019-09-03 19:58:47,683 INFO L476 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-09-03 19:58:47,683 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2019-09-03 19:58:47,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-03 19:58:47,683 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:58:47,684 INFO L399 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:58:47,684 INFO L418 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:58:47,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:58:47,684 INFO L82 PathProgramCache]: Analyzing trace with hash 787141095, now seen corresponding path program 62 times [2019-09-03 19:58:47,684 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:58:47,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:58:47,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:47,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:58:47,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:47,693 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:58:47,693 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:58:47,693 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:58:47,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:58:48,024 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:58:48,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:58:48,033 WARN L254 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 259 conjunts are in the unsatisfiable core [2019-09-03 19:58:48,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:58:50,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:58:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:58:50,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:58:50,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2019-09-03 19:58:50,329 INFO L454 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-09-03 19:58:50,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-09-03 19:58:50,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2019-09-03 19:58:50,331 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 66 states. [2019-09-03 19:58:53,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:58:53,311 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2019-09-03 19:58:53,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-09-03 19:58:53,312 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 73 [2019-09-03 19:58:53,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:58:53,312 INFO L225 Difference]: With dead ends: 78 [2019-09-03 19:58:53,312 INFO L226 Difference]: Without dead ends: 75 [2019-09-03 19:58:53,313 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2019-09-03 19:58:53,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-03 19:58:53,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-09-03 19:58:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-03 19:58:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2019-09-03 19:58:53,321 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2019-09-03 19:58:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:58:53,321 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2019-09-03 19:58:53,321 INFO L476 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-09-03 19:58:53,321 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2019-09-03 19:58:53,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-09-03 19:58:53,322 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:58:53,322 INFO L399 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:58:53,322 INFO L418 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:58:53,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:58:53,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1368492304, now seen corresponding path program 63 times [2019-09-03 19:58:53,322 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:58:53,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:58:53,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:53,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:58:53,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:53,331 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:58:53,331 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:58:53,331 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:58:53,347 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:59:05,078 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-09-03 19:59:05,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:59:05,084 WARN L254 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 263 conjunts are in the unsatisfiable core [2019-09-03 19:59:05,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:59:07,213 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:59:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:59:07,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:59:07,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2019-09-03 19:59:07,288 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-09-03 19:59:07,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-09-03 19:59:07,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2019-09-03 19:59:07,295 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 67 states. [2019-09-03 19:59:10,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:59:10,452 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2019-09-03 19:59:10,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-09-03 19:59:10,452 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 74 [2019-09-03 19:59:10,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:59:10,453 INFO L225 Difference]: With dead ends: 79 [2019-09-03 19:59:10,453 INFO L226 Difference]: Without dead ends: 76 [2019-09-03 19:59:10,454 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2019-09-03 19:59:10,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-03 19:59:10,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-09-03 19:59:10,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-03 19:59:10,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2019-09-03 19:59:10,461 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2019-09-03 19:59:10,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:59:10,462 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2019-09-03 19:59:10,462 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-09-03 19:59:10,462 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2019-09-03 19:59:10,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-03 19:59:10,462 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:59:10,463 INFO L399 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:59:10,463 INFO L418 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:59:10,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:59:10,463 INFO L82 PathProgramCache]: Analyzing trace with hash 526349063, now seen corresponding path program 64 times [2019-09-03 19:59:10,463 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:59:10,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:59:10,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:59:10,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:59:10,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:59:10,472 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:59:10,472 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:59:10,472 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 19:59:10,491 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:59:11,230 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:59:11,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:59:11,234 WARN L254 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 267 conjunts are in the unsatisfiable core [2019-09-03 19:59:11,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:59:13,363 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:59:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:59:13,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:59:13,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2019-09-03 19:59:13,445 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-09-03 19:59:13,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-09-03 19:59:13,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2019-09-03 19:59:13,446 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 68 states. [2019-09-03 19:59:16,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:59:16,590 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2019-09-03 19:59:16,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-09-03 19:59:16,591 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 75 [2019-09-03 19:59:16,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:59:16,592 INFO L225 Difference]: With dead ends: 80 [2019-09-03 19:59:16,592 INFO L226 Difference]: Without dead ends: 77 [2019-09-03 19:59:16,592 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2019-09-03 19:59:16,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-09-03 19:59:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-09-03 19:59:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-03 19:59:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2019-09-03 19:59:16,600 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2019-09-03 19:59:16,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:59:16,601 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2019-09-03 19:59:16,601 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-09-03 19:59:16,601 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2019-09-03 19:59:16,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-03 19:59:16,601 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:59:16,601 INFO L399 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:59:16,601 INFO L418 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:59:16,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:59:16,602 INFO L82 PathProgramCache]: Analyzing trace with hash -863110704, now seen corresponding path program 65 times [2019-09-03 19:59:16,602 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:59:16,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:59:16,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:59:16,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:59:16,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:59:16,610 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:59:16,610 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:59:16,610 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 19:59:16,627 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:59:16,863 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2019-09-03 19:59:16,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:59:16,867 WARN L254 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 271 conjunts are in the unsatisfiable core [2019-09-03 19:59:16,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:59:19,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:59:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:59:19,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:59:19,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2019-09-03 19:59:19,197 INFO L454 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-09-03 19:59:19,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-09-03 19:59:19,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2019-09-03 19:59:19,197 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 69 states. [2019-09-03 19:59:22,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:59:22,531 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2019-09-03 19:59:22,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-09-03 19:59:22,531 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 76 [2019-09-03 19:59:22,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:59:22,532 INFO L225 Difference]: With dead ends: 81 [2019-09-03 19:59:22,532 INFO L226 Difference]: Without dead ends: 78 [2019-09-03 19:59:22,532 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2019-09-03 19:59:22,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-03 19:59:22,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-09-03 19:59:22,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-03 19:59:22,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2019-09-03 19:59:22,540 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2019-09-03 19:59:22,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:59:22,541 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2019-09-03 19:59:22,541 INFO L476 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-09-03 19:59:22,541 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2019-09-03 19:59:22,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-09-03 19:59:22,541 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:59:22,541 INFO L399 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:59:22,542 INFO L418 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:59:22,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:59:22,542 INFO L82 PathProgramCache]: Analyzing trace with hash -986690521, now seen corresponding path program 66 times [2019-09-03 19:59:22,542 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:59:22,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:59:22,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:59:22,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:59:22,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:59:22,550 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:59:22,550 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:59:22,550 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 19:59:22,569 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:59:25,582 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2019-09-03 19:59:25,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:59:25,588 WARN L254 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 275 conjunts are in the unsatisfiable core [2019-09-03 19:59:25,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:59:27,869 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:59:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:59:27,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:59:27,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2019-09-03 19:59:27,944 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-09-03 19:59:27,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-09-03 19:59:27,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2019-09-03 19:59:27,944 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 70 states. [2019-09-03 19:59:31,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:59:31,355 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2019-09-03 19:59:31,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-09-03 19:59:31,355 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 77 [2019-09-03 19:59:31,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:59:31,357 INFO L225 Difference]: With dead ends: 82 [2019-09-03 19:59:31,357 INFO L226 Difference]: Without dead ends: 79 [2019-09-03 19:59:31,357 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2019-09-03 19:59:31,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-03 19:59:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-09-03 19:59:31,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-03 19:59:31,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2019-09-03 19:59:31,366 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2019-09-03 19:59:31,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:59:31,366 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2019-09-03 19:59:31,366 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-09-03 19:59:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2019-09-03 19:59:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-09-03 19:59:31,366 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:59:31,366 INFO L399 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:59:31,367 INFO L418 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:59:31,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:59:31,367 INFO L82 PathProgramCache]: Analyzing trace with hash -522697552, now seen corresponding path program 67 times [2019-09-03 19:59:31,367 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:59:31,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:59:31,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:59:31,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:59:31,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:59:31,374 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:59:31,375 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:59:31,375 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 19:59:31,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:59:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:59:31,600 WARN L254 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 279 conjunts are in the unsatisfiable core [2019-09-03 19:59:31,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:59:33,926 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:59:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:59:34,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:59:34,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2019-09-03 19:59:34,001 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-09-03 19:59:34,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-09-03 19:59:34,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2019-09-03 19:59:34,002 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 71 states. [2019-09-03 19:59:37,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:59:37,445 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2019-09-03 19:59:37,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-09-03 19:59:37,445 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 78 [2019-09-03 19:59:37,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:59:37,446 INFO L225 Difference]: With dead ends: 83 [2019-09-03 19:59:37,446 INFO L226 Difference]: Without dead ends: 80 [2019-09-03 19:59:37,447 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2019-09-03 19:59:37,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-09-03 19:59:37,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-09-03 19:59:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-09-03 19:59:37,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2019-09-03 19:59:37,456 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2019-09-03 19:59:37,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:59:37,456 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2019-09-03 19:59:37,456 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-09-03 19:59:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2019-09-03 19:59:37,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-03 19:59:37,457 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:59:37,457 INFO L399 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:59:37,457 INFO L418 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:59:37,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:59:37,458 INFO L82 PathProgramCache]: Analyzing trace with hash 976182599, now seen corresponding path program 68 times [2019-09-03 19:59:37,458 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:59:37,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:59:37,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:59:37,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:59:37,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:59:37,467 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:59:37,467 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:59:37,467 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 19:59:37,485 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 19:59:37,808 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:59:37,809 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:59:37,814 WARN L254 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 283 conjunts are in the unsatisfiable core [2019-09-03 19:59:37,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:59:40,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:59:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:59:40,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:59:40,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2019-09-03 19:59:40,246 INFO L454 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-09-03 19:59:40,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-09-03 19:59:40,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2019-09-03 19:59:40,247 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 72 states. [2019-09-03 19:59:43,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:59:43,791 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2019-09-03 19:59:43,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-09-03 19:59:43,792 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 79 [2019-09-03 19:59:43,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:59:43,793 INFO L225 Difference]: With dead ends: 84 [2019-09-03 19:59:43,793 INFO L226 Difference]: Without dead ends: 81 [2019-09-03 19:59:43,794 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2019-09-03 19:59:43,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-03 19:59:43,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-09-03 19:59:43,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-03 19:59:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2019-09-03 19:59:43,809 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2019-09-03 19:59:43,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:59:43,809 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2019-09-03 19:59:43,809 INFO L476 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-09-03 19:59:43,809 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2019-09-03 19:59:43,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-03 19:59:43,810 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:59:43,810 INFO L399 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:59:43,810 INFO L418 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:59:43,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:59:43,810 INFO L82 PathProgramCache]: Analyzing trace with hash 196827024, now seen corresponding path program 69 times [2019-09-03 19:59:43,810 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:59:43,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:59:43,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:59:43,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:59:43,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:59:43,826 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 19:59:43,826 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 19:59:43,826 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 19:59:43,839 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:00:03,058 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-09-03 20:00:03,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:00:03,065 WARN L254 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 287 conjunts are in the unsatisfiable core [2019-09-03 20:00:03,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:00:05,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:00:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:00:05,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:00:05,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2019-09-03 20:00:05,646 INFO L454 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-09-03 20:00:05,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-09-03 20:00:05,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2019-09-03 20:00:05,647 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 73 states. [2019-09-03 20:00:09,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:00:09,436 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2019-09-03 20:00:09,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-09-03 20:00:09,436 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 80 [2019-09-03 20:00:09,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:00:09,437 INFO L225 Difference]: With dead ends: 85 [2019-09-03 20:00:09,437 INFO L226 Difference]: Without dead ends: 82 [2019-09-03 20:00:09,437 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=147, Invalid=5255, Unknown=0, NotChecked=0, Total=5402 [2019-09-03 20:00:09,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-09-03 20:00:09,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-09-03 20:00:09,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-09-03 20:00:09,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2019-09-03 20:00:09,445 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2019-09-03 20:00:09,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:00:09,445 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2019-09-03 20:00:09,445 INFO L476 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-09-03 20:00:09,445 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2019-09-03 20:00:09,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-03 20:00:09,446 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:00:09,446 INFO L399 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:00:09,446 INFO L418 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:00:09,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:00:09,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1806607975, now seen corresponding path program 70 times [2019-09-03 20:00:09,447 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:00:09,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:00:09,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:00:09,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:00:09,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:00:09,455 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:00:09,455 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:00:09,455 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:00:09,473 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:00:10,379 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:00:10,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:00:10,384 WARN L254 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 291 conjunts are in the unsatisfiable core [2019-09-03 20:00:10,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:00:12,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:00:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:00:13,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:00:13,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2019-09-03 20:00:13,012 INFO L454 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-09-03 20:00:13,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-09-03 20:00:13,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2019-09-03 20:00:13,013 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 74 states. [2019-09-03 20:00:16,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:00:16,768 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2019-09-03 20:00:16,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-09-03 20:00:16,769 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 81 [2019-09-03 20:00:16,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:00:16,770 INFO L225 Difference]: With dead ends: 86 [2019-09-03 20:00:16,770 INFO L226 Difference]: Without dead ends: 83 [2019-09-03 20:00:16,770 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2019-09-03 20:00:16,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-09-03 20:00:16,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-09-03 20:00:16,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-03 20:00:16,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2019-09-03 20:00:16,780 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2019-09-03 20:00:16,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:00:16,780 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2019-09-03 20:00:16,780 INFO L476 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-09-03 20:00:16,780 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2019-09-03 20:00:16,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-03 20:00:16,781 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:00:16,781 INFO L399 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:00:16,781 INFO L418 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:00:16,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:00:16,781 INFO L82 PathProgramCache]: Analyzing trace with hash 170209904, now seen corresponding path program 71 times [2019-09-03 20:00:16,782 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:00:16,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:00:16,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:00:16,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:00:16,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:00:16,797 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:00:16,797 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:00:16,797 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:00:16,825 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:00:17,202 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2019-09-03 20:00:17,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:00:17,208 WARN L254 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 295 conjunts are in the unsatisfiable core [2019-09-03 20:00:17,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:00:19,866 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:00:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:00:19,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:00:19,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2019-09-03 20:00:19,956 INFO L454 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-09-03 20:00:19,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-09-03 20:00:19,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2019-09-03 20:00:19,957 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 75 states. [2019-09-03 20:00:23,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:00:23,821 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2019-09-03 20:00:23,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-09-03 20:00:23,822 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 82 [2019-09-03 20:00:23,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:00:23,823 INFO L225 Difference]: With dead ends: 87 [2019-09-03 20:00:23,823 INFO L226 Difference]: Without dead ends: 84 [2019-09-03 20:00:23,823 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=151, Invalid=5549, Unknown=0, NotChecked=0, Total=5700 [2019-09-03 20:00:23,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-03 20:00:23,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-09-03 20:00:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-03 20:00:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2019-09-03 20:00:23,830 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2019-09-03 20:00:23,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:00:23,830 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2019-09-03 20:00:23,830 INFO L476 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-09-03 20:00:23,831 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2019-09-03 20:00:23,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-03 20:00:23,831 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:00:23,831 INFO L399 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:00:23,831 INFO L418 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:00:23,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:00:23,831 INFO L82 PathProgramCache]: Analyzing trace with hash 981477255, now seen corresponding path program 72 times [2019-09-03 20:00:23,831 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:00:23,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:00:23,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:00:23,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:00:23,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:00:23,838 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:00:23,839 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:00:23,839 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:00:23,865 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:00:27,719 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-09-03 20:00:27,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:00:27,725 WARN L254 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 299 conjunts are in the unsatisfiable core [2019-09-03 20:00:27,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:00:30,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:00:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:00:30,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:00:30,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2019-09-03 20:00:30,759 INFO L454 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-09-03 20:00:30,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-09-03 20:00:30,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2019-09-03 20:00:30,760 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 76 states. [2019-09-03 20:00:34,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:00:34,811 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2019-09-03 20:00:34,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-09-03 20:00:34,811 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 83 [2019-09-03 20:00:34,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:00:34,812 INFO L225 Difference]: With dead ends: 88 [2019-09-03 20:00:34,812 INFO L226 Difference]: Without dead ends: 85 [2019-09-03 20:00:34,813 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2019-09-03 20:00:34,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-03 20:00:34,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2019-09-03 20:00:34,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-03 20:00:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2019-09-03 20:00:34,820 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2019-09-03 20:00:34,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:00:34,820 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2019-09-03 20:00:34,820 INFO L476 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-09-03 20:00:34,821 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2019-09-03 20:00:34,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-03 20:00:34,821 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:00:34,821 INFO L399 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:00:34,822 INFO L418 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:00:34,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:00:34,822 INFO L82 PathProgramCache]: Analyzing trace with hash 360961360, now seen corresponding path program 73 times [2019-09-03 20:00:34,822 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:00:34,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:00:34,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:00:34,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:00:34,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:00:34,829 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:00:34,829 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:00:34,829 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:00:34,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:00:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:00:35,372 WARN L254 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 303 conjunts are in the unsatisfiable core [2019-09-03 20:00:35,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:00:38,432 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:00:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:00:38,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:00:38,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2019-09-03 20:00:38,515 INFO L454 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-09-03 20:00:38,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-09-03 20:00:38,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2019-09-03 20:00:38,516 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 77 states. [2019-09-03 20:00:42,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:00:42,629 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2019-09-03 20:00:42,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-09-03 20:00:42,629 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 84 [2019-09-03 20:00:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:00:42,630 INFO L225 Difference]: With dead ends: 89 [2019-09-03 20:00:42,630 INFO L226 Difference]: Without dead ends: 86 [2019-09-03 20:00:42,631 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=155, Invalid=5851, Unknown=0, NotChecked=0, Total=6006 [2019-09-03 20:00:42,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-03 20:00:42,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-09-03 20:00:42,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-03 20:00:42,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2019-09-03 20:00:42,638 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2019-09-03 20:00:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:00:42,639 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2019-09-03 20:00:42,639 INFO L476 AbstractCegarLoop]: Interpolant automaton has 77 states. [2019-09-03 20:00:42,639 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2019-09-03 20:00:42,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-03 20:00:42,639 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:00:42,639 INFO L399 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:00:42,640 INFO L418 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:00:42,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:00:42,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1695162201, now seen corresponding path program 74 times [2019-09-03 20:00:42,640 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:00:42,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:00:42,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:00:42,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:00:42,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:00:42,648 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:00:42,648 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:00:42,648 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:00:42,658 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:00:42,898 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:00:42,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:00:42,902 WARN L254 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 307 conjunts are in the unsatisfiable core [2019-09-03 20:00:42,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:00:45,822 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:00:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:00:45,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:00:45,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2019-09-03 20:00:45,902 INFO L454 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-09-03 20:00:45,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-09-03 20:00:45,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2019-09-03 20:00:45,903 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 78 states. [2019-09-03 20:00:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:00:50,133 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2019-09-03 20:00:50,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-09-03 20:00:50,134 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 85 [2019-09-03 20:00:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:00:50,134 INFO L225 Difference]: With dead ends: 90 [2019-09-03 20:00:50,134 INFO L226 Difference]: Without dead ends: 87 [2019-09-03 20:00:50,135 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=157, Invalid=6005, Unknown=0, NotChecked=0, Total=6162 [2019-09-03 20:00:50,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-09-03 20:00:50,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-09-03 20:00:50,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-03 20:00:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2019-09-03 20:00:50,154 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2019-09-03 20:00:50,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:00:50,155 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2019-09-03 20:00:50,155 INFO L476 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-09-03 20:00:50,155 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2019-09-03 20:00:50,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-03 20:00:50,155 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:00:50,156 INFO L399 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:00:50,156 INFO L418 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:00:50,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:00:50,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1010483152, now seen corresponding path program 75 times [2019-09-03 20:00:50,156 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:00:50,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:00:50,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:00:50,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:00:50,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:00:50,164 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:00:50,164 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:00:50,164 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:00:50,180 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:01:15,452 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2019-09-03 20:01:15,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:15,459 WARN L254 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 311 conjunts are in the unsatisfiable core [2019-09-03 20:01:15,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:18,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:18,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:18,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2019-09-03 20:01:18,426 INFO L454 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-09-03 20:01:18,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-09-03 20:01:18,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2019-09-03 20:01:18,427 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 79 states. [2019-09-03 20:01:22,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:22,794 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2019-09-03 20:01:22,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-09-03 20:01:22,794 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 86 [2019-09-03 20:01:22,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:22,795 INFO L225 Difference]: With dead ends: 91 [2019-09-03 20:01:22,795 INFO L226 Difference]: Without dead ends: 88 [2019-09-03 20:01:22,796 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=159, Invalid=6161, Unknown=0, NotChecked=0, Total=6320 [2019-09-03 20:01:22,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-03 20:01:22,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-09-03 20:01:22,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-03 20:01:22,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2019-09-03 20:01:22,805 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2019-09-03 20:01:22,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:22,806 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2019-09-03 20:01:22,806 INFO L476 AbstractCegarLoop]: Interpolant automaton has 79 states. [2019-09-03 20:01:22,806 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2019-09-03 20:01:22,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-03 20:01:22,806 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:22,806 INFO L399 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:22,807 INFO L418 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:22,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:22,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1260269113, now seen corresponding path program 76 times [2019-09-03 20:01:22,807 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:22,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:22,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:22,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:22,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:22,815 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:22,816 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:22,816 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:22,843 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:01:23,867 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:01:23,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:23,872 WARN L254 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 315 conjunts are in the unsatisfiable core [2019-09-03 20:01:23,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:26,826 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:26,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:26,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2019-09-03 20:01:26,917 INFO L454 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-09-03 20:01:26,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-09-03 20:01:26,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2019-09-03 20:01:26,917 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 80 states. [2019-09-03 20:01:31,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:31,318 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2019-09-03 20:01:31,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-09-03 20:01:31,319 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 87 [2019-09-03 20:01:31,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:31,320 INFO L225 Difference]: With dead ends: 92 [2019-09-03 20:01:31,320 INFO L226 Difference]: Without dead ends: 89 [2019-09-03 20:01:31,321 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=161, Invalid=6319, Unknown=0, NotChecked=0, Total=6480 [2019-09-03 20:01:31,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-09-03 20:01:31,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-09-03 20:01:31,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-03 20:01:31,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2019-09-03 20:01:31,331 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2019-09-03 20:01:31,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:31,331 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2019-09-03 20:01:31,331 INFO L476 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-09-03 20:01:31,331 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2019-09-03 20:01:31,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-03 20:01:31,332 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:31,332 INFO L399 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:31,332 INFO L418 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:31,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:31,333 INFO L82 PathProgramCache]: Analyzing trace with hash -413699312, now seen corresponding path program 77 times [2019-09-03 20:01:31,333 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:31,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:31,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:31,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:31,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:31,341 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:31,341 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:31,341 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:01:31,369 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:31,741 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2019-09-03 20:01:31,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:31,746 WARN L254 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 319 conjunts are in the unsatisfiable core [2019-09-03 20:01:31,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:34,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:34,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:34,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2019-09-03 20:01:34,883 INFO L454 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-09-03 20:01:34,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-09-03 20:01:34,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2019-09-03 20:01:34,884 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 81 states. [2019-09-03 20:01:39,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:39,475 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2019-09-03 20:01:39,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-09-03 20:01:39,475 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 88 [2019-09-03 20:01:39,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:39,476 INFO L225 Difference]: With dead ends: 93 [2019-09-03 20:01:39,476 INFO L226 Difference]: Without dead ends: 90 [2019-09-03 20:01:39,477 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=163, Invalid=6479, Unknown=0, NotChecked=0, Total=6642 [2019-09-03 20:01:39,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-09-03 20:01:39,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-09-03 20:01:39,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-03 20:01:39,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2019-09-03 20:01:39,484 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2019-09-03 20:01:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:39,485 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2019-09-03 20:01:39,485 INFO L476 AbstractCegarLoop]: Interpolant automaton has 81 states. [2019-09-03 20:01:39,485 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2019-09-03 20:01:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-09-03 20:01:39,485 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:39,485 INFO L399 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:39,485 INFO L418 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:39,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:39,486 INFO L82 PathProgramCache]: Analyzing trace with hash 60160743, now seen corresponding path program 78 times [2019-09-03 20:01:39,486 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:39,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:39,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:39,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:39,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:39,494 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:39,494 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:39,494 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:01:39,513 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:45,524 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2019-09-03 20:01:45,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:45,533 WARN L254 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 323 conjunts are in the unsatisfiable core [2019-09-03 20:01:45,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:48,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:48,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:48,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2019-09-03 20:01:48,888 INFO L454 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-09-03 20:01:48,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-09-03 20:01:48,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2019-09-03 20:01:48,890 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 82 states. [2019-09-03 20:01:53,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:53,500 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2019-09-03 20:01:53,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-09-03 20:01:53,501 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 89 [2019-09-03 20:01:53,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:53,501 INFO L225 Difference]: With dead ends: 94 [2019-09-03 20:01:53,501 INFO L226 Difference]: Without dead ends: 91 [2019-09-03 20:01:53,502 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=165, Invalid=6641, Unknown=0, NotChecked=0, Total=6806 [2019-09-03 20:01:53,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-03 20:01:53,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-09-03 20:01:53,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-03 20:01:53,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2019-09-03 20:01:53,509 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2019-09-03 20:01:53,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:53,509 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2019-09-03 20:01:53,509 INFO L476 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-09-03 20:01:53,509 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2019-09-03 20:01:53,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-09-03 20:01:53,510 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:53,510 INFO L399 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:53,510 INFO L418 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:53,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:53,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1864920560, now seen corresponding path program 79 times [2019-09-03 20:01:53,510 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:53,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:53,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:53,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:53,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:53,519 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:01:53,519 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:01:53,519 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:01:53,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:01:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:01:53,937 WARN L254 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 327 conjunts are in the unsatisfiable core [2019-09-03 20:01:53,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:57,058 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:01:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:57,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:01:57,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2019-09-03 20:01:57,144 INFO L454 AbstractCegarLoop]: Interpolant automaton has 83 states [2019-09-03 20:01:57,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2019-09-03 20:01:57,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2019-09-03 20:01:57,145 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 83 states. [2019-09-03 20:02:01,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:01,922 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2019-09-03 20:02:01,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-09-03 20:02:01,922 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 90 [2019-09-03 20:02:01,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:01,924 INFO L225 Difference]: With dead ends: 95 [2019-09-03 20:02:01,924 INFO L226 Difference]: Without dead ends: 92 [2019-09-03 20:02:01,924 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=167, Invalid=6805, Unknown=0, NotChecked=0, Total=6972 [2019-09-03 20:02:01,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-09-03 20:02:01,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-09-03 20:02:01,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-03 20:02:01,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2019-09-03 20:02:01,932 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2019-09-03 20:02:01,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:01,932 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2019-09-03 20:02:01,932 INFO L476 AbstractCegarLoop]: Interpolant automaton has 83 states. [2019-09-03 20:02:01,932 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2019-09-03 20:02:01,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-03 20:02:01,933 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:01,933 INFO L399 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:01,933 INFO L418 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:01,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:01,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1977900039, now seen corresponding path program 80 times [2019-09-03 20:02:01,933 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:01,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:01,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:01,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:01,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:01,941 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:01,941 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:01,941 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:02:01,960 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:02,241 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:02:02,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:02,246 WARN L254 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 331 conjunts are in the unsatisfiable core [2019-09-03 20:02:02,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:05,495 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:05,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:05,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2019-09-03 20:02:05,588 INFO L454 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-09-03 20:02:05,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-09-03 20:02:05,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2019-09-03 20:02:05,589 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 84 states. [2019-09-03 20:02:10,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:10,491 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2019-09-03 20:02:10,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-09-03 20:02:10,491 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 91 [2019-09-03 20:02:10,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:10,492 INFO L225 Difference]: With dead ends: 96 [2019-09-03 20:02:10,492 INFO L226 Difference]: Without dead ends: 93 [2019-09-03 20:02:10,493 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=169, Invalid=6971, Unknown=0, NotChecked=0, Total=7140 [2019-09-03 20:02:10,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-03 20:02:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-09-03 20:02:10,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-03 20:02:10,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2019-09-03 20:02:10,504 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2019-09-03 20:02:10,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:10,504 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2019-09-03 20:02:10,504 INFO L476 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-09-03 20:02:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2019-09-03 20:02:10,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-09-03 20:02:10,505 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:10,505 INFO L399 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:10,505 INFO L418 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:10,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:10,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1185296592, now seen corresponding path program 81 times [2019-09-03 20:02:10,506 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:10,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:10,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:10,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:10,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:10,513 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:10,514 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:10,514 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:10,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:02:47,324 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2019-09-03 20:02:47,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:47,333 WARN L254 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 335 conjunts are in the unsatisfiable core [2019-09-03 20:02:47,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:50,620 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:50,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:50,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2019-09-03 20:02:50,728 INFO L454 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-09-03 20:02:50,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-09-03 20:02:50,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2019-09-03 20:02:50,729 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 85 states. [2019-09-03 20:02:55,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:55,804 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2019-09-03 20:02:55,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-09-03 20:02:55,804 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 92 [2019-09-03 20:02:55,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:55,805 INFO L225 Difference]: With dead ends: 97 [2019-09-03 20:02:55,805 INFO L226 Difference]: Without dead ends: 94 [2019-09-03 20:02:55,805 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=171, Invalid=7139, Unknown=0, NotChecked=0, Total=7310 [2019-09-03 20:02:55,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-03 20:02:55,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-09-03 20:02:55,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-03 20:02:55,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2019-09-03 20:02:55,812 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2019-09-03 20:02:55,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:55,813 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2019-09-03 20:02:55,813 INFO L476 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-09-03 20:02:55,813 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2019-09-03 20:02:55,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-03 20:02:55,813 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:55,813 INFO L399 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:55,814 INFO L418 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:55,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:55,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1910573785, now seen corresponding path program 82 times [2019-09-03 20:02:55,814 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:55,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:55,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:55,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:55,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:55,822 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:55,822 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:55,822 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:55,833 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:02:57,054 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:02:57,054 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:57,059 WARN L254 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 339 conjunts are in the unsatisfiable core [2019-09-03 20:02:57,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:00,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:00,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:00,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2019-09-03 20:03:00,505 INFO L454 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-09-03 20:03:00,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-09-03 20:03:00,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2019-09-03 20:03:00,505 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 86 states. [2019-09-03 20:03:05,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:05,638 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2019-09-03 20:03:05,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-09-03 20:03:05,639 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 93 [2019-09-03 20:03:05,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:05,639 INFO L225 Difference]: With dead ends: 98 [2019-09-03 20:03:05,639 INFO L226 Difference]: Without dead ends: 95 [2019-09-03 20:03:05,640 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=173, Invalid=7309, Unknown=0, NotChecked=0, Total=7482 [2019-09-03 20:03:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-09-03 20:03:05,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2019-09-03 20:03:05,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-09-03 20:03:05,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2019-09-03 20:03:05,649 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2019-09-03 20:03:05,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:05,650 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2019-09-03 20:03:05,650 INFO L476 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-09-03 20:03:05,650 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2019-09-03 20:03:05,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-09-03 20:03:05,651 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:05,651 INFO L399 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:05,651 INFO L418 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:05,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:05,651 INFO L82 PathProgramCache]: Analyzing trace with hash 901692336, now seen corresponding path program 83 times [2019-09-03 20:03:05,651 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:05,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:05,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:05,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:05,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:05,669 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:05,670 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:05,670 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:05,682 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:03:06,127 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2019-09-03 20:03:06,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:06,133 WARN L254 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 343 conjunts are in the unsatisfiable core [2019-09-03 20:03:06,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:09,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:03:09,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:09,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2019-09-03 20:03:09,803 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-09-03 20:03:09,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-09-03 20:03:09,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2019-09-03 20:03:09,804 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 87 states. [2019-09-03 20:03:15,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:15,047 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2019-09-03 20:03:15,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-09-03 20:03:15,047 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 94 [2019-09-03 20:03:15,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:15,048 INFO L225 Difference]: With dead ends: 99 [2019-09-03 20:03:15,048 INFO L226 Difference]: Without dead ends: 96 [2019-09-03 20:03:15,049 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=175, Invalid=7481, Unknown=0, NotChecked=0, Total=7656 [2019-09-03 20:03:15,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-09-03 20:03:15,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-09-03 20:03:15,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-03 20:03:15,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2019-09-03 20:03:15,057 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2019-09-03 20:03:15,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:15,058 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2019-09-03 20:03:15,058 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-09-03 20:03:15,058 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2019-09-03 20:03:15,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-03 20:03:15,058 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:15,059 INFO L399 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:15,059 INFO L418 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:15,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:15,059 INFO L82 PathProgramCache]: Analyzing trace with hash -2112371129, now seen corresponding path program 84 times [2019-09-03 20:03:15,059 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:15,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:15,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:15,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:15,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:15,071 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:15,071 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:15,071 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:15,085 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:03:22,646 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2019-09-03 20:03:22,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:22,656 WARN L254 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 347 conjunts are in the unsatisfiable core [2019-09-03 20:03:22,657 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:26,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:26,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:26,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2019-09-03 20:03:26,345 INFO L454 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-09-03 20:03:26,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-09-03 20:03:26,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2019-09-03 20:03:26,346 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 88 states. [2019-09-03 20:03:31,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:31,827 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2019-09-03 20:03:31,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-09-03 20:03:31,827 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 95 [2019-09-03 20:03:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:31,828 INFO L225 Difference]: With dead ends: 100 [2019-09-03 20:03:31,829 INFO L226 Difference]: Without dead ends: 97 [2019-09-03 20:03:31,829 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=177, Invalid=7655, Unknown=0, NotChecked=0, Total=7832 [2019-09-03 20:03:31,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-03 20:03:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-09-03 20:03:31,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-09-03 20:03:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2019-09-03 20:03:31,838 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2019-09-03 20:03:31,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:31,838 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2019-09-03 20:03:31,839 INFO L476 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-09-03 20:03:31,839 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2019-09-03 20:03:31,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-03 20:03:31,839 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:31,839 INFO L399 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:31,840 INFO L418 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:31,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:31,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1059058032, now seen corresponding path program 85 times [2019-09-03 20:03:31,840 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:31,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:31,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:31,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:31,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:31,849 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:31,849 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:31,850 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:31,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:03:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:03:32,216 WARN L254 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 351 conjunts are in the unsatisfiable core [2019-09-03 20:03:32,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:35,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:03:35,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:35,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2019-09-03 20:03:35,971 INFO L454 AbstractCegarLoop]: Interpolant automaton has 89 states [2019-09-03 20:03:35,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2019-09-03 20:03:35,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2019-09-03 20:03:35,972 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 89 states. [2019-09-03 20:03:41,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:41,571 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2019-09-03 20:03:41,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-09-03 20:03:41,572 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 96 [2019-09-03 20:03:41,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:41,573 INFO L225 Difference]: With dead ends: 101 [2019-09-03 20:03:41,573 INFO L226 Difference]: Without dead ends: 98 [2019-09-03 20:03:41,574 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=179, Invalid=7831, Unknown=0, NotChecked=0, Total=8010 [2019-09-03 20:03:41,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-03 20:03:41,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-09-03 20:03:41,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-03 20:03:41,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2019-09-03 20:03:41,584 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2019-09-03 20:03:41,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:41,584 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2019-09-03 20:03:41,584 INFO L476 AbstractCegarLoop]: Interpolant automaton has 89 states. [2019-09-03 20:03:41,585 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2019-09-03 20:03:41,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-03 20:03:41,585 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:41,586 INFO L399 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:41,586 INFO L418 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:41,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:41,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1528876903, now seen corresponding path program 86 times [2019-09-03 20:03:41,586 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:41,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:41,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:41,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:03:41,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:41,594 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:41,594 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:41,594 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:03:41,616 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:41,956 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:03:41,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:41,961 WARN L254 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 355 conjunts are in the unsatisfiable core [2019-09-03 20:03:41,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:45,751 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:45,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:45,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2019-09-03 20:03:45,860 INFO L454 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-09-03 20:03:45,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-09-03 20:03:45,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2019-09-03 20:03:45,861 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 90 states. [2019-09-03 20:03:51,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:51,720 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2019-09-03 20:03:51,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-09-03 20:03:51,720 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 97 [2019-09-03 20:03:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:51,721 INFO L225 Difference]: With dead ends: 102 [2019-09-03 20:03:51,721 INFO L226 Difference]: Without dead ends: 99 [2019-09-03 20:03:51,721 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=181, Invalid=8009, Unknown=0, NotChecked=0, Total=8190 [2019-09-03 20:03:51,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-03 20:03:51,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2019-09-03 20:03:51,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-09-03 20:03:51,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2019-09-03 20:03:51,728 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2019-09-03 20:03:51,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:51,728 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2019-09-03 20:03:51,729 INFO L476 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-09-03 20:03:51,729 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2019-09-03 20:03:51,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-03 20:03:51,729 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:51,729 INFO L399 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:51,729 INFO L418 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:51,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:51,730 INFO L82 PathProgramCache]: Analyzing trace with hash 150481264, now seen corresponding path program 87 times [2019-09-03 20:03:51,730 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:51,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:51,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:51,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:51,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:51,736 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:51,736 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:51,736 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:51,746 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:04:43,674 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2019-09-03 20:04:43,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:43,683 WARN L254 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 359 conjunts are in the unsatisfiable core [2019-09-03 20:04:43,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:47,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:04:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:47,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:04:47,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2019-09-03 20:04:47,611 INFO L454 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-09-03 20:04:47,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-09-03 20:04:47,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2019-09-03 20:04:47,612 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 91 states. [2019-09-03 20:04:53,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:53,543 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2019-09-03 20:04:53,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-09-03 20:04:53,543 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 98 [2019-09-03 20:04:53,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:53,544 INFO L225 Difference]: With dead ends: 103 [2019-09-03 20:04:53,544 INFO L226 Difference]: Without dead ends: 100 [2019-09-03 20:04:53,545 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=183, Invalid=8189, Unknown=0, NotChecked=0, Total=8372 [2019-09-03 20:04:53,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-03 20:04:53,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-09-03 20:04:53,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-03 20:04:53,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2019-09-03 20:04:53,553 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2019-09-03 20:04:53,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:53,554 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2019-09-03 20:04:53,554 INFO L476 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-09-03 20:04:53,554 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2019-09-03 20:04:53,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-03 20:04:53,554 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:53,554 INFO L399 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:53,554 INFO L418 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:53,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:53,555 INFO L82 PathProgramCache]: Analyzing trace with hash 369889415, now seen corresponding path program 88 times [2019-09-03 20:04:53,555 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:53,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:53,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:53,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:53,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:53,563 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:04:53,563 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:04:53,563 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:04:53,592 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:04:54,947 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:04:54,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:54,955 WARN L254 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 363 conjunts are in the unsatisfiable core [2019-09-03 20:04:54,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:58,831 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:04:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:58,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:04:58,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2019-09-03 20:04:58,936 INFO L454 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-09-03 20:04:58,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-09-03 20:04:58,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2019-09-03 20:04:58,937 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 92 states. [2019-09-03 20:05:04,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:04,994 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2019-09-03 20:05:04,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-09-03 20:05:04,994 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 99 [2019-09-03 20:05:04,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:04,994 INFO L225 Difference]: With dead ends: 104 [2019-09-03 20:05:04,995 INFO L226 Difference]: Without dead ends: 101 [2019-09-03 20:05:04,995 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=185, Invalid=8371, Unknown=0, NotChecked=0, Total=8556 [2019-09-03 20:05:04,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-09-03 20:05:05,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-09-03 20:05:05,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-03 20:05:05,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2019-09-03 20:05:05,003 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2019-09-03 20:05:05,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:05,004 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2019-09-03 20:05:05,004 INFO L476 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-09-03 20:05:05,004 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2019-09-03 20:05:05,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-03 20:05:05,004 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:05,004 INFO L399 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:05,004 INFO L418 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:05,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:05,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1418392496, now seen corresponding path program 89 times [2019-09-03 20:05:05,005 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:05,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:05,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:05,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:05,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:05,011 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:05:05,012 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:05:05,012 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:05:05,023 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:05:05,566 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2019-09-03 20:05:05,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:05,572 WARN L254 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 367 conjunts are in the unsatisfiable core [2019-09-03 20:05:05,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:09,676 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:05:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:09,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:05:09,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2019-09-03 20:05:09,785 INFO L454 AbstractCegarLoop]: Interpolant automaton has 93 states [2019-09-03 20:05:09,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2019-09-03 20:05:09,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2019-09-03 20:05:09,786 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 93 states. [2019-09-03 20:05:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:16,160 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2019-09-03 20:05:16,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-09-03 20:05:16,161 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 100 [2019-09-03 20:05:16,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:16,162 INFO L225 Difference]: With dead ends: 105 [2019-09-03 20:05:16,162 INFO L226 Difference]: Without dead ends: 102 [2019-09-03 20:05:16,163 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=187, Invalid=8555, Unknown=0, NotChecked=0, Total=8742 [2019-09-03 20:05:16,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-03 20:05:16,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2019-09-03 20:05:16,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-03 20:05:16,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2019-09-03 20:05:16,172 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2019-09-03 20:05:16,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:16,172 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2019-09-03 20:05:16,172 INFO L476 AbstractCegarLoop]: Interpolant automaton has 93 states. [2019-09-03 20:05:16,172 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2019-09-03 20:05:16,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-03 20:05:16,172 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:16,173 INFO L399 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:16,173 INFO L418 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:16,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:16,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1020556889, now seen corresponding path program 90 times [2019-09-03 20:05:16,173 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:16,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:16,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:16,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:16,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:16,179 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:05:16,180 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:05:16,180 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:05:16,189 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:05:28,337 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2019-09-03 20:05:28,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:28,348 WARN L254 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 371 conjunts are in the unsatisfiable core [2019-09-03 20:05:28,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:32,635 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:05:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:32,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:05:32,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2019-09-03 20:05:32,741 INFO L454 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-09-03 20:05:32,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-09-03 20:05:32,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2019-09-03 20:05:32,742 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 94 states. [2019-09-03 20:05:38,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:38,994 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2019-09-03 20:05:38,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-09-03 20:05:38,995 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 101 [2019-09-03 20:05:38,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:38,996 INFO L225 Difference]: With dead ends: 106 [2019-09-03 20:05:38,996 INFO L226 Difference]: Without dead ends: 103 [2019-09-03 20:05:38,996 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=189, Invalid=8741, Unknown=0, NotChecked=0, Total=8930 [2019-09-03 20:05:38,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-03 20:05:39,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2019-09-03 20:05:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-09-03 20:05:39,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2019-09-03 20:05:39,006 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2019-09-03 20:05:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:39,006 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2019-09-03 20:05:39,006 INFO L476 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-09-03 20:05:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2019-09-03 20:05:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-03 20:05:39,007 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:39,007 INFO L399 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:39,007 INFO L418 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:39,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:39,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1572554960, now seen corresponding path program 91 times [2019-09-03 20:05:39,008 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:39,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:39,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:39,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:39,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:39,016 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:05:39,016 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:05:39,016 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:05:39,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:05:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:39,441 WARN L254 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 375 conjunts are in the unsatisfiable core [2019-09-03 20:05:39,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:43,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:05:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:43,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:05:43,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2019-09-03 20:05:43,691 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-09-03 20:05:43,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-09-03 20:05:43,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2019-09-03 20:05:43,691 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 95 states. [2019-09-03 20:05:50,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:50,127 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2019-09-03 20:05:50,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-09-03 20:05:50,128 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 102 [2019-09-03 20:05:50,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:50,129 INFO L225 Difference]: With dead ends: 107 [2019-09-03 20:05:50,129 INFO L226 Difference]: Without dead ends: 104 [2019-09-03 20:05:50,129 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=191, Invalid=8929, Unknown=0, NotChecked=0, Total=9120 [2019-09-03 20:05:50,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-03 20:05:50,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-09-03 20:05:50,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-09-03 20:05:50,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2019-09-03 20:05:50,140 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2019-09-03 20:05:50,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:50,141 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2019-09-03 20:05:50,141 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-09-03 20:05:50,141 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2019-09-03 20:05:50,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-03 20:05:50,141 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:50,142 INFO L399 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:50,142 INFO L418 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:50,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:50,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1504625977, now seen corresponding path program 92 times [2019-09-03 20:05:50,142 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:50,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:50,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:50,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:05:50,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:50,151 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:05:50,151 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:05:50,151 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:05:50,164 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:05:50,568 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:05:50,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:50,574 WARN L254 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 379 conjunts are in the unsatisfiable core [2019-09-03 20:05:50,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:54,839 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:05:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:54,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:05:54,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2019-09-03 20:05:54,943 INFO L454 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-09-03 20:05:54,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-09-03 20:05:54,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2019-09-03 20:05:54,944 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 96 states. [2019-09-03 20:06:01,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:06:01,544 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2019-09-03 20:06:01,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-09-03 20:06:01,545 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 103 [2019-09-03 20:06:01,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:06:01,546 INFO L225 Difference]: With dead ends: 108 [2019-09-03 20:06:01,546 INFO L226 Difference]: Without dead ends: 105 [2019-09-03 20:06:01,547 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=193, Invalid=9119, Unknown=0, NotChecked=0, Total=9312 [2019-09-03 20:06:01,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-09-03 20:06:01,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2019-09-03 20:06:01,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-03 20:06:01,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2019-09-03 20:06:01,558 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2019-09-03 20:06:01,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:06:01,558 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2019-09-03 20:06:01,558 INFO L476 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-09-03 20:06:01,558 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2019-09-03 20:06:01,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-03 20:06:01,559 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:06:01,559 INFO L399 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:06:01,559 INFO L418 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:06:01,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:06:01,559 INFO L82 PathProgramCache]: Analyzing trace with hash 601172496, now seen corresponding path program 93 times [2019-09-03 20:06:01,560 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:06:01,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:06:01,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:01,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:06:01,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:01,568 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:06:01,568 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:06:01,569 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:06:01,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:07:12,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2019-09-03 20:07:12,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:07:12,516 WARN L254 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 383 conjunts are in the unsatisfiable core [2019-09-03 20:07:12,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:16,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:07:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:07:17,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:07:17,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2019-09-03 20:07:17,082 INFO L454 AbstractCegarLoop]: Interpolant automaton has 97 states [2019-09-03 20:07:17,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2019-09-03 20:07:17,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2019-09-03 20:07:17,087 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 97 states. [2019-09-03 20:07:23,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:23,864 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2019-09-03 20:07:23,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-09-03 20:07:23,865 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 104 [2019-09-03 20:07:23,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:23,866 INFO L225 Difference]: With dead ends: 109 [2019-09-03 20:07:23,866 INFO L226 Difference]: Without dead ends: 106 [2019-09-03 20:07:23,867 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=195, Invalid=9311, Unknown=0, NotChecked=0, Total=9506 [2019-09-03 20:07:23,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-03 20:07:23,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-09-03 20:07:23,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-03 20:07:23,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2019-09-03 20:07:23,879 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2019-09-03 20:07:23,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:23,879 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2019-09-03 20:07:23,879 INFO L476 AbstractCegarLoop]: Interpolant automaton has 97 states. [2019-09-03 20:07:23,879 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2019-09-03 20:07:23,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-03 20:07:23,880 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:23,880 INFO L399 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:23,880 INFO L418 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:23,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:23,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1456415719, now seen corresponding path program 94 times [2019-09-03 20:07:23,881 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:23,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:23,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:23,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:07:23,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:23,890 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:07:23,890 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:07:23,890 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:07:23,916 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:07:25,420 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:07:25,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:07:25,427 WARN L254 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 387 conjunts are in the unsatisfiable core [2019-09-03 20:07:25,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:29,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:07:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:07:30,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:07:30,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2019-09-03 20:07:30,042 INFO L454 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-09-03 20:07:30,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-09-03 20:07:30,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=9313, Unknown=0, NotChecked=0, Total=9506 [2019-09-03 20:07:30,042 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 98 states. [2019-09-03 20:07:36,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:36,909 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2019-09-03 20:07:36,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-09-03 20:07:36,910 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 105 [2019-09-03 20:07:36,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:36,910 INFO L225 Difference]: With dead ends: 110 [2019-09-03 20:07:36,911 INFO L226 Difference]: Without dead ends: 107 [2019-09-03 20:07:36,911 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=197, Invalid=9505, Unknown=0, NotChecked=0, Total=9702 [2019-09-03 20:07:36,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-03 20:07:36,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2019-09-03 20:07:36,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-09-03 20:07:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2019-09-03 20:07:36,922 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2019-09-03 20:07:36,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:36,923 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2019-09-03 20:07:36,923 INFO L476 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-09-03 20:07:36,923 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2019-09-03 20:07:36,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-03 20:07:36,924 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:36,924 INFO L399 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:36,924 INFO L418 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:36,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:36,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2095815440, now seen corresponding path program 95 times [2019-09-03 20:07:36,924 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:36,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:36,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:36,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:07:36,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:36,933 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:07:36,934 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:07:36,934 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:07:36,960 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:07:37,541 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2019-09-03 20:07:37,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:07:37,547 WARN L254 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 391 conjunts are in the unsatisfiable core [2019-09-03 20:07:37,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:42,223 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:07:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:07:42,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:07:42,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2019-09-03 20:07:42,334 INFO L454 AbstractCegarLoop]: Interpolant automaton has 99 states [2019-09-03 20:07:42,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2019-09-03 20:07:42,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=9507, Unknown=0, NotChecked=0, Total=9702 [2019-09-03 20:07:42,336 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 99 states. [2019-09-03 20:07:49,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:49,245 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2019-09-03 20:07:49,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-09-03 20:07:49,245 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 106 [2019-09-03 20:07:49,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:49,247 INFO L225 Difference]: With dead ends: 111 [2019-09-03 20:07:49,247 INFO L226 Difference]: Without dead ends: 108 [2019-09-03 20:07:49,248 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=199, Invalid=9701, Unknown=0, NotChecked=0, Total=9900 [2019-09-03 20:07:49,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-09-03 20:07:49,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2019-09-03 20:07:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-09-03 20:07:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2019-09-03 20:07:49,260 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2019-09-03 20:07:49,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:49,260 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2019-09-03 20:07:49,260 INFO L476 AbstractCegarLoop]: Interpolant automaton has 99 states. [2019-09-03 20:07:49,260 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2019-09-03 20:07:49,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-03 20:07:49,261 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:49,261 INFO L399 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:49,261 INFO L418 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:49,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:49,261 INFO L82 PathProgramCache]: Analyzing trace with hash -545831673, now seen corresponding path program 96 times [2019-09-03 20:07:49,262 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:49,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:49,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:49,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:07:49,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:49,270 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:07:49,270 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:07:49,271 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:07:49,291 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:08:03,784 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2019-09-03 20:08:03,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:08:03,796 WARN L254 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 395 conjunts are in the unsatisfiable core [2019-09-03 20:08:03,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:08:08,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:08:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:08:08,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:08:08,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2019-09-03 20:08:08,411 INFO L454 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-09-03 20:08:08,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-09-03 20:08:08,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=9703, Unknown=0, NotChecked=0, Total=9900 [2019-09-03 20:08:08,412 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 100 states. [2019-09-03 20:08:15,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:08:15,470 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2019-09-03 20:08:15,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-09-03 20:08:15,471 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 107 [2019-09-03 20:08:15,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:08:15,472 INFO L225 Difference]: With dead ends: 112 [2019-09-03 20:08:15,472 INFO L226 Difference]: Without dead ends: 109 [2019-09-03 20:08:15,473 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=201, Invalid=9899, Unknown=0, NotChecked=0, Total=10100 [2019-09-03 20:08:15,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-09-03 20:08:15,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2019-09-03 20:08:15,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-09-03 20:08:15,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2019-09-03 20:08:15,482 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2019-09-03 20:08:15,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:08:15,482 INFO L475 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2019-09-03 20:08:15,482 INFO L476 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-09-03 20:08:15,482 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2019-09-03 20:08:15,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-03 20:08:15,483 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:08:15,483 INFO L399 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:08:15,483 INFO L418 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:08:15,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:08:15,484 INFO L82 PathProgramCache]: Analyzing trace with hash 259024848, now seen corresponding path program 97 times [2019-09-03 20:08:15,484 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:08:15,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:08:15,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:15,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:08:15,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:15,492 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:08:15,492 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:08:15,492 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:08:15,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:08:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:08:15,961 WARN L254 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 399 conjunts are in the unsatisfiable core [2019-09-03 20:08:15,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:08:20,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:08:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:08:20,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:08:20,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2019-09-03 20:08:20,754 INFO L454 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-09-03 20:08:20,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-09-03 20:08:20,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=9901, Unknown=0, NotChecked=0, Total=10100 [2019-09-03 20:08:20,755 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 101 states. [2019-09-03 20:08:28,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:08:28,029 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2019-09-03 20:08:28,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-09-03 20:08:28,029 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 108 [2019-09-03 20:08:28,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:08:28,030 INFO L225 Difference]: With dead ends: 113 [2019-09-03 20:08:28,030 INFO L226 Difference]: Without dead ends: 110 [2019-09-03 20:08:28,031 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=203, Invalid=10099, Unknown=0, NotChecked=0, Total=10302 [2019-09-03 20:08:28,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-09-03 20:08:28,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2019-09-03 20:08:28,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-09-03 20:08:28,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2019-09-03 20:08:28,040 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2019-09-03 20:08:28,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:08:28,040 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2019-09-03 20:08:28,040 INFO L476 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-09-03 20:08:28,040 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2019-09-03 20:08:28,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-03 20:08:28,041 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:08:28,041 INFO L399 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:08:28,041 INFO L418 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:08:28,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:08:28,041 INFO L82 PathProgramCache]: Analyzing trace with hash -560226777, now seen corresponding path program 98 times [2019-09-03 20:08:28,041 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:08:28,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:08:28,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:28,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:08:28,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:28,050 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:08:28,050 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:08:28,050 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:08:28,067 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:08:28,515 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:08:28,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:08:28,520 WARN L254 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 403 conjunts are in the unsatisfiable core [2019-09-03 20:08:28,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:08:33,202 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:08:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:08:33,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:08:33,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2019-09-03 20:08:33,325 INFO L454 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-09-03 20:08:33,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-09-03 20:08:33,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=10101, Unknown=0, NotChecked=0, Total=10302 [2019-09-03 20:08:33,326 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 102 states. [2019-09-03 20:08:40,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:08:40,676 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2019-09-03 20:08:40,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-09-03 20:08:40,677 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 109 [2019-09-03 20:08:40,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:08:40,678 INFO L225 Difference]: With dead ends: 114 [2019-09-03 20:08:40,678 INFO L226 Difference]: Without dead ends: 111 [2019-09-03 20:08:40,678 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=205, Invalid=10301, Unknown=0, NotChecked=0, Total=10506 [2019-09-03 20:08:40,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-09-03 20:08:40,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2019-09-03 20:08:40,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-09-03 20:08:40,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2019-09-03 20:08:40,687 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2019-09-03 20:08:40,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:08:40,688 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2019-09-03 20:08:40,688 INFO L476 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-09-03 20:08:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2019-09-03 20:08:40,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-03 20:08:40,688 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:08:40,688 INFO L399 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:08:40,688 INFO L418 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:08:40,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:08:40,689 INFO L82 PathProgramCache]: Analyzing trace with hash -187223376, now seen corresponding path program 99 times [2019-09-03 20:08:40,689 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:08:40,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:08:40,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:40,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:08:40,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:40,696 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:08:40,697 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:08:40,697 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:08:40,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2