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/loops/linear_sea.ch.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 16:11:24,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 16:11:24,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 16:11:24,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-16 16:11:24,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-16 16:11:24,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-16 16:11:24,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-16 16:11:24,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-16 16:11:24,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-16 16:11:24,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-16 16:11:24,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-16 16:11:24,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-16 16:11:24,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 16:11:24,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 16:11:24,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 16:11:24,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 16:11:24,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 16:11:24,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 16:11:24,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 16:11:24,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 16:11:24,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 16:11:24,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 16:11:24,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 16:11:24,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 16:11:24,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-16 16:11:24,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-16 16:11:24,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-16 16:11:24,576 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-16 16:11:24,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-16 16:11:24,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-16 16:11:24,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-16 16:11:24,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-16 16:11:24,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-16 16:11:24,580 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-16 16:11:24,581 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-16 16:11:24,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-16 16:11:24,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-16 16:11:24,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-16 16:11:24,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 16:11:24,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 16:11:24,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 16:11:24,585 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 [2019-09-16 16:11:24,600 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 16:11:24,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 16:11:24,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-16 16:11:24,602 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-16 16:11:24,602 INFO L138 SettingsManager]: * Use SBE=true [2019-09-16 16:11:24,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 16:11:24,603 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 16:11:24,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-16 16:11:24,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 16:11:24,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 16:11:24,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 16:11:24,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 16:11:24,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 16:11:24,604 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 16:11:24,604 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 16:11:24,605 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-16 16:11:24,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 16:11:24,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 16:11:24,605 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 16:11:24,605 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-16 16:11:24,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-16 16:11:24,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 16:11:24,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 16:11:24,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 16:11:24,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-16 16:11:24,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-16 16:11:24,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 16:11:24,607 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-16 16:11:24,607 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 16:11:24,635 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 16:11:24,650 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 16:11:24,654 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 16:11:24,655 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 16:11:24,655 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 16:11:24,656 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch.c [2019-09-16 16:11:24,720 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35ca012a6/939d3e6e755643e183dc31e3fa1c6697/FLAGb3ab4a518 [2019-09-16 16:11:25,217 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 16:11:25,219 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch.c [2019-09-16 16:11:25,226 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35ca012a6/939d3e6e755643e183dc31e3fa1c6697/FLAGb3ab4a518 [2019-09-16 16:11:25,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35ca012a6/939d3e6e755643e183dc31e3fa1c6697 [2019-09-16 16:11:25,612 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 16:11:25,613 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 16:11:25,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 16:11:25,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 16:11:25,617 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 16:11:25,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:11:25" (1/1) ... [2019-09-16 16:11:25,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6214f535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25, skipping insertion in model container [2019-09-16 16:11:25,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:11:25" (1/1) ... [2019-09-16 16:11:25,628 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 16:11:25,648 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 16:11:25,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:11:25,905 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 16:11:25,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:11:25,956 INFO L192 MainTranslator]: Completed translation [2019-09-16 16:11:25,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25 WrapperNode [2019-09-16 16:11:25,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 16:11:25,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 16:11:25,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 16:11:25,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 16:11:26,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25" (1/1) ... [2019-09-16 16:11:26,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25" (1/1) ... [2019-09-16 16:11:26,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25" (1/1) ... [2019-09-16 16:11:26,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25" (1/1) ... [2019-09-16 16:11:26,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25" (1/1) ... [2019-09-16 16:11:26,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25" (1/1) ... [2019-09-16 16:11:26,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25" (1/1) ... [2019-09-16 16:11:26,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 16:11:26,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 16:11:26,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 16:11:26,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 16:11:26,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25" (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 [2019-09-16 16:11:26,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 16:11:26,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 16:11:26,223 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-16 16:11:26,223 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2019-09-16 16:11:26,223 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 16:11:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 16:11:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-16 16:11:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 16:11:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-16 16:11:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2019-09-16 16:11:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-16 16:11:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 16:11:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-16 16:11:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-16 16:11:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 16:11:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 16:11:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-16 16:11:26,466 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 16:11:26,467 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-16 16:11:26,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:11:26 BoogieIcfgContainer [2019-09-16 16:11:26,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 16:11:26,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 16:11:26,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 16:11:26,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 16:11:26,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 04:11:25" (1/3) ... [2019-09-16 16:11:26,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47d8f864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:11:26, skipping insertion in model container [2019-09-16 16:11:26,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:25" (2/3) ... [2019-09-16 16:11:26,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47d8f864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:11:26, skipping insertion in model container [2019-09-16 16:11:26,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:11:26" (3/3) ... [2019-09-16 16:11:26,476 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.c [2019-09-16 16:11:26,496 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 16:11:26,513 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 16:11:26,567 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 16:11:26,618 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-16 16:11:26,619 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 16:11:26,619 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-16 16:11:26,619 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 16:11:26,620 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 16:11:26,620 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 16:11:26,620 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 16:11:26,620 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 16:11:26,620 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 16:11:26,641 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-09-16 16:11:26,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-16 16:11:26,646 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:26,647 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:26,649 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:26,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:26,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1860043698, now seen corresponding path program 1 times [2019-09-16 16:11:26,656 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:26,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:26,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:26,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:26,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:26,838 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:11:26,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-16 16:11:26,842 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-16 16:11:26,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-16 16:11:26,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 16:11:26,856 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2019-09-16 16:11:26,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:26,875 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2019-09-16 16:11:26,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-16 16:11:26,877 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2019-09-16 16:11:26,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:26,886 INFO L225 Difference]: With dead ends: 44 [2019-09-16 16:11:26,886 INFO L226 Difference]: Without dead ends: 21 [2019-09-16 16:11:26,889 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 16:11:26,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-16 16:11:26,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-16 16:11:26,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-16 16:11:26,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-09-16 16:11:26,929 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2019-09-16 16:11:26,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:26,930 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-09-16 16:11:26,930 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-16 16:11:26,930 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-09-16 16:11:26,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-16 16:11:26,931 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:26,931 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:26,932 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:26,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:26,932 INFO L82 PathProgramCache]: Analyzing trace with hash 916881159, now seen corresponding path program 1 times [2019-09-16 16:11:26,933 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:26,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:26,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:26,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:26,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:27,105 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:11:27,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-16 16:11:27,107 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-16 16:11:27,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-16 16:11:27,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-16 16:11:27,108 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2019-09-16 16:11:27,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:27,154 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2019-09-16 16:11:27,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-16 16:11:27,155 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-09-16 16:11:27,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:27,156 INFO L225 Difference]: With dead ends: 29 [2019-09-16 16:11:27,156 INFO L226 Difference]: Without dead ends: 21 [2019-09-16 16:11:27,158 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-16 16:11:27,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-16 16:11:27,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-16 16:11:27,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-16 16:11:27,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-16 16:11:27,163 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2019-09-16 16:11:27,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:27,164 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-16 16:11:27,164 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-16 16:11:27,164 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-16 16:11:27,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-16 16:11:27,165 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:27,165 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:27,166 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:27,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:27,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1635275802, now seen corresponding path program 1 times [2019-09-16 16:11:27,166 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:27,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:27,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:27,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:27,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:27,388 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:11:27,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-16 16:11:27,389 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-16 16:11:27,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-16 16:11:27,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-16 16:11:27,390 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2019-09-16 16:11:27,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:27,461 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-09-16 16:11:27,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-16 16:11:27,462 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-09-16 16:11:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:27,463 INFO L225 Difference]: With dead ends: 33 [2019-09-16 16:11:27,463 INFO L226 Difference]: Without dead ends: 24 [2019-09-16 16:11:27,464 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-16 16:11:27,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-16 16:11:27,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-16 16:11:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-16 16:11:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-09-16 16:11:27,471 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 20 [2019-09-16 16:11:27,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:27,472 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-09-16 16:11:27,472 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-16 16:11:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-09-16 16:11:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-16 16:11:27,473 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:27,473 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:27,474 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:27,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:27,474 INFO L82 PathProgramCache]: Analyzing trace with hash 636491705, now seen corresponding path program 1 times [2019-09-16 16:11:27,474 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:27,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:27,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:27,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:27,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:27,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:27,651 INFO L224 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:11:27,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:27,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-16 16:11:27,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:27,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:27,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-09-16 16:11:27,884 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-16 16:11:27,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-16 16:11:27,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-16 16:11:27,887 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2019-09-16 16:11:28,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:28,028 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2019-09-16 16:11:28,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-16 16:11:28,029 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-09-16 16:11:28,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:28,030 INFO L225 Difference]: With dead ends: 36 [2019-09-16 16:11:28,030 INFO L226 Difference]: Without dead ends: 27 [2019-09-16 16:11:28,031 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-16 16:11:28,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-16 16:11:28,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-16 16:11:28,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-16 16:11:28,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-09-16 16:11:28,041 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2019-09-16 16:11:28,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:28,042 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-09-16 16:11:28,042 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-16 16:11:28,042 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-09-16 16:11:28,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-16 16:11:28,044 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:28,044 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:28,044 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:28,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:28,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1232357626, now seen corresponding path program 2 times [2019-09-16 16:11:28,045 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:28,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:28,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:28,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:28,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-16 16:11:28,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:28,343 INFO L224 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:11:28,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-16 16:11:28,407 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-09-16 16:11:28,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:11:28,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-16 16:11:28,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-16 16:11:28,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:28,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2019-09-16 16:11:28,501 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-16 16:11:28,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-16 16:11:28,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-09-16 16:11:28,502 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 11 states. [2019-09-16 16:11:28,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:28,752 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-09-16 16:11:28,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-16 16:11:28,753 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2019-09-16 16:11:28,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:28,758 INFO L225 Difference]: With dead ends: 39 [2019-09-16 16:11:28,759 INFO L226 Difference]: Without dead ends: 30 [2019-09-16 16:11:28,760 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-09-16 16:11:28,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-16 16:11:28,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-09-16 16:11:28,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-16 16:11:28,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-09-16 16:11:28,776 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 26 [2019-09-16 16:11:28,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:28,778 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-09-16 16:11:28,778 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-16 16:11:28,778 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-09-16 16:11:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-16 16:11:28,779 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:28,779 INFO L407 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:28,780 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:28,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1625384636, now seen corresponding path program 1 times [2019-09-16 16:11:28,780 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:28,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:28,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:28,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:11:28,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:31,217 WARN L191 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 163 DAG size of output: 31 [2019-09-16 16:11:31,496 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2019-09-16 16:11:33,810 WARN L191 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 81 DAG size of output: 40 [2019-09-16 16:11:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:33,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:33,814 INFO L224 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:11:33,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:33,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-16 16:11:33,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:33,908 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:11:37,946 WARN L191 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 30 DAG size of output: 13 [2019-09-16 16:11:38,008 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2019-09-16 16:11:38,008 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-16 16:11:38,019 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-16 16:11:38,020 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 1 [2019-09-16 16:11:38,020 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-16 16:11:40,148 WARN L191 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 64 DAG size of output: 25 [2019-09-16 16:11:40,149 INFO L567 ElimStorePlain]: treesize reduction 268, result has 10.7 percent of original size [2019-09-16 16:11:40,149 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_6| vanished before elimination [2019-09-16 16:11:40,149 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-09-16 16:11:40,149 INFO L464 ElimStorePlain]: Eliminatee v_prenex_5 vanished before elimination [2019-09-16 16:11:40,154 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-16 16:11:40,154 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:359, output treesize:32 [2019-09-16 16:11:40,396 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2019-09-16 16:11:41,064 WARN L191 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-09-16 16:11:41,274 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:11:41,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:11:41,278 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:11:41,279 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:11:41,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:11:44,252 WARN L191 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2019-09-16 16:11:44,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:11:44,626 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2019-09-16 16:11:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:44,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:44,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2019-09-16 16:11:44,726 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-16 16:11:44,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-16 16:11:44,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=239, Unknown=1, NotChecked=0, Total=306 [2019-09-16 16:11:44,727 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 18 states. [2019-09-16 16:11:48,355 WARN L191 SmtUtils]: Spent 3.49 s on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2019-09-16 16:11:50,389 WARN L191 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2019-09-16 16:11:50,660 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2019-09-16 16:11:51,181 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2019-09-16 16:11:52,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:52,021 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2019-09-16 16:11:52,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-16 16:11:52,022 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2019-09-16 16:11:52,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:52,023 INFO L225 Difference]: With dead ends: 49 [2019-09-16 16:11:52,024 INFO L226 Difference]: Without dead ends: 37 [2019-09-16 16:11:52,024 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=121, Invalid=430, Unknown=1, NotChecked=0, Total=552 [2019-09-16 16:11:52,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-16 16:11:52,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2019-09-16 16:11:52,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-16 16:11:52,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-09-16 16:11:52,031 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 26 [2019-09-16 16:11:52,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:52,032 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-09-16 16:11:52,032 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-16 16:11:52,032 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-09-16 16:11:52,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-16 16:11:52,033 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:52,033 INFO L407 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:52,033 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:52,034 INFO L82 PathProgramCache]: Analyzing trace with hash -854746409, now seen corresponding path program 2 times [2019-09-16 16:11:52,034 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:52,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:52,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:52,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:52,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:52,429 WARN L191 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 32 [2019-09-16 16:11:52,696 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2019-09-16 16:11:55,310 WARN L191 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 175 DAG size of output: 39 [2019-09-16 16:11:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:55,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:55,316 INFO L224 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:11:55,331 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-16 16:11:55,434 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:11:55,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:11:55,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 48 conjunts are in the unsatisfiable core [2019-09-16 16:11:55,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:55,442 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:11:59,532 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-09-16 16:11:59,533 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-16 16:12:03,601 WARN L191 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 59 DAG size of output: 26 [2019-09-16 16:12:03,601 INFO L567 ElimStorePlain]: treesize reduction 238, result has 11.5 percent of original size [2019-09-16 16:12:03,601 INFO L464 ElimStorePlain]: Eliminatee v_prenex_9 vanished before elimination [2019-09-16 16:12:03,606 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-09-16 16:12:03,607 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-16 16:12:03,626 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-16 16:12:03,626 INFO L464 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2019-09-16 16:12:03,626 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-16 16:12:03,627 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:329, output treesize:27 [2019-09-16 16:12:07,507 WARN L191 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 49 [2019-09-16 16:12:10,855 WARN L191 SmtUtils]: Spent 3.24 s on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2019-09-16 16:12:12,934 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 51 [2019-09-16 16:12:15,174 WARN L191 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2019-09-16 16:12:15,176 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:12:15,177 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:12:15,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:12:15,181 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:12:15,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:12:15,592 WARN L191 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2019-09-16 16:12:18,021 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2019-09-16 16:12:19,170 WARN L191 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 54 [2019-09-16 16:12:22,621 WARN L191 SmtUtils]: Spent 3.26 s on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2019-09-16 16:12:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:12:22,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:12:22,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18] total 26 [2019-09-16 16:12:22,829 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-16 16:12:22,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-16 16:12:22,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=537, Unknown=3, NotChecked=0, Total=650 [2019-09-16 16:12:22,830 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 26 states. [2019-09-16 16:12:23,502 WARN L191 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2019-09-16 16:12:28,800 WARN L191 SmtUtils]: Spent 3.18 s on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2019-09-16 16:12:29,118 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2019-09-16 16:12:30,058 WARN L191 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2019-09-16 16:12:30,554 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2019-09-16 16:12:30,905 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2019-09-16 16:12:35,888 WARN L191 SmtUtils]: Spent 4.68 s on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-09-16 16:12:37,579 WARN L191 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2019-09-16 16:12:39,538 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2019-09-16 16:12:39,709 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2019-09-16 16:12:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:12:39,785 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2019-09-16 16:12:39,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-16 16:12:39,787 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2019-09-16 16:12:39,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:12:39,788 INFO L225 Difference]: With dead ends: 67 [2019-09-16 16:12:39,788 INFO L226 Difference]: Without dead ends: 47 [2019-09-16 16:12:39,795 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 39.0s TimeCoverageRelationStatistics Valid=279, Invalid=1358, Unknown=3, NotChecked=0, Total=1640 [2019-09-16 16:12:39,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-16 16:12:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2019-09-16 16:12:39,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-16 16:12:39,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2019-09-16 16:12:39,806 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 29 [2019-09-16 16:12:39,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:12:39,807 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2019-09-16 16:12:39,808 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-16 16:12:39,808 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2019-09-16 16:12:39,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-16 16:12:39,809 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:12:39,809 INFO L407 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:12:39,809 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:12:39,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:12:39,810 INFO L82 PathProgramCache]: Analyzing trace with hash 628477028, now seen corresponding path program 3 times [2019-09-16 16:12:39,811 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:12:39,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:12:39,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:12:39,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:12:39,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:12:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:12:40,242 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 31 [2019-09-16 16:12:40,806 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 42 [2019-09-16 16:12:41,109 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 61 [2019-09-16 16:12:41,301 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 55 [2019-09-16 16:12:41,526 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 61 [2019-09-16 16:12:41,695 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2019-09-16 16:12:41,901 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2019-09-16 16:12:42,132 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 53 [2019-09-16 16:12:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:12:42,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:12:42,159 INFO L224 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:12:42,178 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 16:12:45,674 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-16 16:12:45,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:12:45,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 54 conjunts are in the unsatisfiable core [2019-09-16 16:12:45,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:12:45,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:12:47,816 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-09-16 16:12:47,816 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-16 16:12:47,823 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-09-16 16:12:47,823 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-16 16:12:49,899 WARN L191 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 61 DAG size of output: 31 [2019-09-16 16:12:49,899 INFO L567 ElimStorePlain]: treesize reduction 232, result has 15.9 percent of original size [2019-09-16 16:12:49,908 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-09-16 16:12:49,908 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-09-16 16:12:49,922 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-16 16:12:49,922 INFO L464 ElimStorePlain]: Eliminatee v_prenex_11 vanished before elimination [2019-09-16 16:12:49,922 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_8| vanished before elimination [2019-09-16 16:12:49,923 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-16 16:12:49,923 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:407, output treesize:40 [2019-09-16 16:12:56,691 WARN L191 SmtUtils]: Spent 4.15 s on a formula simplification that was a NOOP. DAG size: 49 [2019-09-16 16:12:57,078 WARN L191 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2019-09-16 16:12:58,273 WARN L191 SmtUtils]: Spent 951.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2019-09-16 16:12:58,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:12:58,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:12:58,278 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:12:58,278 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:12:58,280 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:12:59,373 WARN L191 SmtUtils]: Spent 951.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2019-09-16 16:13:02,394 WARN L191 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2019-09-16 16:13:04,827 WARN L191 SmtUtils]: Spent 2.35 s on a formula simplification that was a NOOP. DAG size: 54 [2019-09-16 16:13:05,092 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2019-09-16 16:13:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:13:05,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:13:05,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 31 [2019-09-16 16:13:05,125 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-16 16:13:05,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-16 16:13:05,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=837, Unknown=2, NotChecked=0, Total=930 [2019-09-16 16:13:05,126 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 31 states. [2019-09-16 16:13:08,228 WARN L191 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2019-09-16 16:13:08,498 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2019-09-16 16:13:09,593 WARN L191 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2019-09-16 16:13:11,939 WARN L191 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2019-09-16 16:13:14,457 WARN L191 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2019-09-16 16:13:14,651 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2019-09-16 16:13:14,939 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2019-09-16 16:13:18,181 WARN L191 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2019-09-16 16:13:22,398 WARN L191 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2019-09-16 16:13:23,825 WARN L191 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 169 DAG size of output: 122 [2019-09-16 16:13:26,284 WARN L191 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 116 DAG size of output: 100 [2019-09-16 16:13:27,086 WARN L191 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2019-09-16 16:13:27,512 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 95 [2019-09-16 16:13:29,836 WARN L191 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 108 DAG size of output: 100 [2019-09-16 16:13:31,912 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse13 (div (+ (* (- 4) c_linear_search_~j~0) (- 4)) 2)) (.cse15 (div c_linear_search_~n 4294967296)) (.cse14 (div c_linear_search_~j~0 4294967296)) (.cse17 (= c_linear_search_~a.offset 0))) (let ((.cse0 (mod c_~SIZE~0 4294967296)) (.cse7 (not .cse17)) (.cse8 (<= c_linear_search_~j~0 3)) (.cse9 (<= (+ .cse15 1) .cse14)) (.cse10 (and (not (= (select (select |c_#memory_int| c_linear_search_~a.base) (+ (* (- 1) .cse13) c_linear_search_~a.offset)) |c_linear_search_#in~q|)) (= |c_linear_search_#in~a.base| c_linear_search_~a.base)))) (and (< .cse0 100000) (let ((.cse3 (div c_~SIZE~0 4294967296))) (let ((.cse6 (div (+ c_~SIZE~0 (* (- 4294967296) .cse3)) 2))) (or (let ((.cse2 (* 4294967296 .cse3))) (let ((.cse1 (+ .cse2 2147483647))) (and (or (< .cse1 c_~SIZE~0) (not (= c_~SIZE~0 (+ |c_linear_search_#in~n| .cse2)))) (or (<= c_~SIZE~0 .cse1) (not (= c_~SIZE~0 (+ |c_linear_search_#in~n| .cse2 4294967296))))))) (not (= |c_linear_search_#in~a.offset| 0)) (let ((.cse5 (* 4 c_~SIZE~0)) (.cse4 (div .cse6 4294967296))) (and (not (= (select (select |c_#memory_int| |c_linear_search_#in~a.base|) (+ (* (- 17179869184) .cse4) .cse5 (* (- 17179869184) .cse3) (* (- 4) .cse6))) |c_linear_search_#in~q|)) (<= .cse5 (+ (* 17179869184 .cse4) (* 8 .cse6) (* 17179869184 .cse3))))) (<= .cse6 0)))) (or .cse7 (and .cse8 (or .cse9 (not |c_linear_search_#t~short1|) (let ((.cse11 (+ (* 4 (div (+ (* 2 c_linear_search_~j~0) (* (- 4294967296) .cse14) (* 4294967296 .cse15) (* (- 1) c_linear_search_~n) (- 1)) 2)) 4)) (.cse12 (+ (* 4 c_linear_search_~j~0) .cse13))) (and (or .cse10 (< .cse11 .cse12)) (<= .cse11 .cse12)))))) (= |c_linear_search_#in~n| c_linear_search_~n) (exists ((v_main_~a~0.base_BEFORE_CALL_3 Int)) (= 3 (select (select |c_#memory_int| v_main_~a~0.base_BEFORE_CALL_3) (* 4 (mod (div (mod c_~SIZE~0 4294967296) 2) 4294967296))))) (= c_~MAX~0 100000) (< 1 .cse0) (<= 3 c_linear_search_~j~0) (exists ((|v_main_#t~nondet3_5| Int)) (let ((.cse16 (mod |v_main_#t~nondet3_5| 4294967296))) (and (<= 0 .cse16) (= c_~SIZE~0 (+ (div .cse16 8) 1))))) (or .cse7 (and .cse8 (or .cse9 .cse10))) (or (= |c_linear_search_#in~a.offset| c_linear_search_~a.offset) .cse17) (exists ((|v_main_#t~nondet3_5| Int)) (= c_~SIZE~0 (+ (div (mod |v_main_#t~nondet3_5| 4294967296) 8) 1)))))) is different from true [2019-09-16 16:13:33,987 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse11 (* (- 4) c_linear_search_~j~0))) (let ((.cse10 (* 4 c_linear_search_~j~0)) (.cse9 (div (+ .cse11 (- 4)) 2)) (.cse16 (div c_linear_search_~j~0 4294967296)) (.cse15 (div c_linear_search_~n 4294967296))) (let ((.cse13 (= c_linear_search_~a.offset 0)) (.cse4 (+ (* 4 (div (+ (* 2 c_linear_search_~j~0) (* (- 4294967296) .cse16) (* 4294967296 .cse15) (* (- 1) c_linear_search_~n) (- 1)) 2)) 4)) (.cse5 (+ .cse10 .cse9))) (let ((.cse6 (<= .cse4 .cse5)) (.cse7 (select |c_#memory_int| |c_linear_search_#in~a.base|)) (.cse12 (mod c_~SIZE~0 4294967296)) (.cse8 (mod (+ c_linear_search_~j~0 4294967295) 4294967296)) (.cse0 (not .cse13)) (.cse1 (<= c_linear_search_~j~0 3)) (.cse2 (<= (+ .cse15 1) .cse16)) (.cse3 (and (not (= (select (select |c_#memory_int| c_linear_search_~a.base) (+ (* (- 1) .cse9) c_linear_search_~a.offset)) |c_linear_search_#in~q|)) (= |c_linear_search_#in~a.base| c_linear_search_~a.base)))) (and (or .cse0 (and .cse1 (or .cse2 (not |c_linear_search_#t~short1|) (and (or .cse3 (< .cse4 .cse5)) .cse6)))) (= |c_linear_search_#in~n| c_linear_search_~n) (not (= (select .cse7 (+ (* 4 .cse8) |c_linear_search_#in~a.offset|)) |c_linear_search_#in~q|)) (or (not (= |c_linear_search_#in~a.offset| 0)) (and .cse1 (or (and (not (= (select .cse7 (- .cse9)) |c_linear_search_#in~q|)) .cse6) .cse2 (<= .cse4 (+ .cse10 (div (+ .cse11 (- 6)) 2)))))) (= c_~MAX~0 100000) (< 1 .cse12) (not (= (select .cse7 (+ |c_linear_search_#in~a.offset| (* 4 (mod (+ c_linear_search_~j~0 4294967294) 4294967296)))) |c_linear_search_#in~q|)) (<= 3 c_linear_search_~j~0) (or (= |c_linear_search_#in~a.offset| c_linear_search_~a.offset) .cse13) (exists ((|v_main_#t~nondet3_5| Int)) (= c_~SIZE~0 (+ (div (mod |v_main_#t~nondet3_5| 4294967296) 8) 1))) (< .cse12 100000) (= c_linear_search_~j~0 3) (< .cse8 (mod c_linear_search_~n 4294967296)) (exists ((v_main_~a~0.base_BEFORE_CALL_3 Int)) (= 3 (select (select |c_#memory_int| v_main_~a~0.base_BEFORE_CALL_3) (* 4 (mod (div (mod c_~SIZE~0 4294967296) 2) 4294967296))))) (exists ((|v_main_#t~nondet3_5| Int)) (let ((.cse14 (mod |v_main_#t~nondet3_5| 4294967296))) (and (<= 0 .cse14) (= c_~SIZE~0 (+ (div .cse14 8) 1))))) (or .cse0 (and .cse1 (or .cse2 .cse3)))))))) is different from true [2019-09-16 16:13:34,988 WARN L191 SmtUtils]: Spent 920.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 73 [2019-09-16 16:13:35,440 WARN L191 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 77 [2019-09-16 16:13:39,805 WARN L191 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 130 DAG size of output: 82 [2019-09-16 16:13:40,162 WARN L191 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2019-09-16 16:13:40,871 WARN L191 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 86 [2019-09-16 16:13:41,795 WARN L191 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 77 [2019-09-16 16:13:42,228 WARN L191 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2019-09-16 16:13:43,345 WARN L191 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 81 [2019-09-16 16:13:45,531 WARN L191 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 160 DAG size of output: 75 [2019-09-16 16:13:46,036 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 79 [2019-09-16 16:13:46,917 WARN L191 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 69 [2019-09-16 16:13:47,532 WARN L191 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 107 [2019-09-16 16:13:49,200 WARN L191 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 176 DAG size of output: 74 [2019-09-16 16:13:49,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:13:49,408 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2019-09-16 16:13:49,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-16 16:13:49,411 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 32 [2019-09-16 16:13:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:13:49,417 INFO L225 Difference]: With dead ends: 103 [2019-09-16 16:13:49,417 INFO L226 Difference]: Without dead ends: 79 [2019-09-16 16:13:49,419 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 61.8s TimeCoverageRelationStatistics Valid=451, Invalid=3212, Unknown=5, NotChecked=238, Total=3906 [2019-09-16 16:13:49,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-16 16:13:49,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2019-09-16 16:13:49,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-16 16:13:49,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2019-09-16 16:13:49,445 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 32 [2019-09-16 16:13:49,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:13:49,446 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2019-09-16 16:13:49,446 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-16 16:13:49,446 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2019-09-16 16:13:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-16 16:13:49,450 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:13:49,451 INFO L407 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:13:49,451 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:13:49,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:13:49,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1647272728, now seen corresponding path program 4 times [2019-09-16 16:13:49,454 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:13:49,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:13:49,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:13:49,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:13:49,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:13:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:13:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-09-16 16:13:49,484 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:13:49,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-16 16:13:49,484 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-16 16:13:49,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-16 16:13:49,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 16:13:49,485 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 3 states. [2019-09-16 16:13:49,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:13:49,496 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2019-09-16 16:13:49,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-16 16:13:49,497 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-09-16 16:13:49,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:13:49,498 INFO L225 Difference]: With dead ends: 74 [2019-09-16 16:13:49,498 INFO L226 Difference]: Without dead ends: 36 [2019-09-16 16:13:49,498 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 16:13:49,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-16 16:13:49,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-16 16:13:49,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-16 16:13:49,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-09-16 16:13:49,508 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 32 [2019-09-16 16:13:49,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:13:49,509 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-09-16 16:13:49,509 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-16 16:13:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-09-16 16:13:49,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-16 16:13:49,513 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:13:49,513 INFO L407 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:13:49,513 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:13:49,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:13:49,514 INFO L82 PathProgramCache]: Analyzing trace with hash 714347447, now seen corresponding path program 5 times [2019-09-16 16:13:49,514 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:13:49,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:13:49,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:13:49,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:13:49,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:13:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:13:52,072 WARN L191 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 203 DAG size of output: 31 [2019-09-16 16:13:52,352 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 35 [2019-09-16 16:13:52,727 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2019-09-16 16:13:52,886 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2019-09-16 16:13:55,798 WARN L191 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 248 DAG size of output: 49 [2019-09-16 16:13:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:13:55,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:13:55,807 INFO L224 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:13:55,834 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-16 16:13:56,340 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-16 16:13:56,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:13:56,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 53 conjunts are in the unsatisfiable core [2019-09-16 16:13:56,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:13:56,349 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:14:10,476 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-09-16 16:14:10,476 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-16 16:14:10,486 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-09-16 16:14:10,487 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-16 16:14:10,548 INFO L567 ElimStorePlain]: treesize reduction 217, result has 15.2 percent of original size [2019-09-16 16:14:10,549 INFO L464 ElimStorePlain]: Eliminatee v_prenex_17 vanished before elimination [2019-09-16 16:14:10,549 INFO L464 ElimStorePlain]: Eliminatee v_prenex_16 vanished before elimination [2019-09-16 16:14:10,553 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-09-16 16:14:10,553 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-09-16 16:14:10,569 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-16 16:14:10,570 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-16 16:14:10,571 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:377, output treesize:35 [2019-09-16 16:14:11,879 WARN L191 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 25 [2019-09-16 16:14:12,318 WARN L191 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2019-09-16 16:14:12,885 WARN L191 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2019-09-16 16:14:13,551 WARN L191 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2019-09-16 16:14:15,957 WARN L191 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2019-09-16 16:14:17,999 WARN L191 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2019-09-16 16:14:21,669 WARN L191 SmtUtils]: Spent 3.38 s on a formula simplification that was a NOOP. DAG size: 61 [2019-09-16 16:14:22,225 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2019-09-16 16:14:22,526 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:14:24,932 WARN L191 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2019-09-16 16:14:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:14:25,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:25,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 35 [2019-09-16 16:14:25,096 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-16 16:14:25,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-16 16:14:25,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1072, Unknown=6, NotChecked=0, Total=1190 [2019-09-16 16:14:25,097 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2019-09-16 16:14:26,007 WARN L191 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2019-09-16 16:14:27,962 WARN L191 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2019-09-16 16:14:31,287 WARN L191 SmtUtils]: Spent 3.19 s on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2019-09-16 16:14:32,502 WARN L191 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2019-09-16 16:14:38,916 WARN L191 SmtUtils]: Spent 6.27 s on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2019-09-16 16:14:40,512 WARN L191 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2019-09-16 16:14:43,281 WARN L191 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2019-09-16 16:14:43,762 WARN L191 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2019-09-16 16:14:44,424 WARN L191 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2019-09-16 16:14:46,931 WARN L191 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2019-09-16 16:14:47,379 WARN L191 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-09-16 16:14:47,686 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2019-09-16 16:14:49,261 WARN L191 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 125 DAG size of output: 98 [2019-09-16 16:14:51,065 WARN L191 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 127 DAG size of output: 88 [2019-09-16 16:14:51,592 WARN L191 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2019-09-16 16:14:52,217 WARN L191 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 78 [2019-09-16 16:14:52,671 WARN L191 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 77 [2019-09-16 16:14:53,011 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 66 [2019-09-16 16:14:53,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:53,137 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-09-16 16:14:53,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-16 16:14:53,138 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2019-09-16 16:14:53,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:53,139 INFO L225 Difference]: With dead ends: 50 [2019-09-16 16:14:53,139 INFO L226 Difference]: Without dead ends: 40 [2019-09-16 16:14:53,140 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 61.1s TimeCoverageRelationStatistics Valid=322, Invalid=2642, Unknown=6, NotChecked=0, Total=2970 [2019-09-16 16:14:53,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-16 16:14:53,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-09-16 16:14:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-16 16:14:53,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-09-16 16:14:53,146 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 35 [2019-09-16 16:14:53,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:53,146 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-09-16 16:14:53,146 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-16 16:14:53,146 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-09-16 16:14:53,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-16 16:14:53,147 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:53,147 INFO L407 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:53,147 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:53,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:53,147 INFO L82 PathProgramCache]: Analyzing trace with hash -920508540, now seen corresponding path program 6 times [2019-09-16 16:14:53,148 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:53,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:53,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:53,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:14:53,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:55,164 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 30 [2019-09-16 16:14:55,532 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 36 [2019-09-16 16:14:55,850 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 40 [2019-09-16 16:14:58,632 WARN L191 SmtUtils]: Spent 2.64 s on a formula simplification. DAG size of input: 137 DAG size of output: 75 [2019-09-16 16:14:59,720 WARN L191 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 65 [2019-09-16 16:16:00,338 WARN L191 SmtUtils]: Spent 50.10 s on a formula simplification. DAG size of input: 141 DAG size of output: 101 [2019-09-16 16:16:02,420 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (div c_linear_search_~j~0 4294967296))) (let ((.cse21 (+ .cse5 1))) (and (or (not (= |c_linear_search_#in~a.offset| 0)) (<= (+ |c_linear_search_#in~n| 4294967290) 0) (let ((.cse7 (* 4294967296 .cse5)) (.cse15 (* (- 8589934592) .cse5)) (.cse20 (* (- 1) |c_linear_search_#in~n|))) (let ((.cse8 (div (+ .cse15 .cse20 6) 8589934592)) (.cse19 (div (+ .cse7 .cse20 (- 5)) 2))) (let ((.cse16 (* (- 2) |c_linear_search_#in~n|)) (.cse11 (div (+ (* 6 c_linear_search_~j~0) (* (- 85899345920) .cse5) (* (- 6) |c_linear_search_#in~n|) (* (- 51539607552) .cse8) (* 12 .cse19) 38) 3)) (.cse12 (* 17179869184 .cse5)) (.cse13 (* 2 |c_linear_search_#in~n|)) (.cse3 (div (+ (* 2147483647 c_linear_search_~j~0) (* (- 36893488138829168640) .cse5) (* (- 2147483647) |c_linear_search_#in~n|) (* 4294967296 .cse19) 18446744082299486210) 18446744069414584320))) (let ((.cse4 (+ .cse11 .cse12 .cse13 (* 17179869184 .cse3))) (.cse6 (* (- 1) c_linear_search_~j~0)) (.cse0 (select |c_#memory_int| |c_linear_search_#in~a.base|)) (.cse1 (- (* (- 17179869184) .cse5))) (.cse2 (- .cse16))) (and (or (not (= |c_linear_search_#in~q| (select .cse0 (+ .cse1 .cse2 (- (* (- 17179869184) .cse3)))))) (< .cse4 0)) (<= .cse4 0) (<= (+ (* 8589934592 .cse5) |c_linear_search_#in~n| (* 8589934592 .cse3)) 6) (<= 0 (+ (* 2 (div (+ .cse6 .cse7 (* 4294967296 .cse8) (- 1)) 2)) |c_linear_search_#in~n| 4)) (let ((.cse14 (* 2 c_linear_search_~j~0))) (or (let ((.cse9 (div (+ .cse14 .cse15 .cse16 8589934585) 8589934592))) (let ((.cse10 (+ (* 17179869184 .cse9) .cse11 .cse12 .cse13))) (and (<= 0 (+ |c_linear_search_#in~n| (* 2 (div (+ .cse6 (* 4294967296 .cse9) .cse7 (- 1)) 2)) 4)) (or (< .cse10 0) (not (= (select .cse0 (+ (- (* (- 17179869184) .cse9)) .cse1 .cse2)) |c_linear_search_#in~q|))) (<= .cse10 0)))) (let ((.cse18 (div (+ .cse14 .cse15 .cse16 17179869177) 8589934592))) (let ((.cse17 (+ .cse11 .cse12 .cse13 (* 17179869184 .cse18)))) (and (or (< .cse17 0) (not (= (select .cse0 (+ .cse1 .cse2 (- (* (- 17179869184) .cse18)))) |c_linear_search_#in~q|))) (<= .cse17 0))))))))))) |c_linear_search_#t~short1| (<= .cse21 0)) (or (<= 0 .cse5) (< 0 .cse21))))) is different from false [2019-09-16 16:16:04,630 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (div c_linear_search_~j~0 4294967296))) (let ((.cse21 (+ .cse5 1))) (and (or (not (= |c_linear_search_#in~a.offset| 0)) (<= (+ |c_linear_search_#in~n| 4294967290) 0) (let ((.cse7 (* 4294967296 .cse5)) (.cse15 (* (- 8589934592) .cse5)) (.cse20 (* (- 1) |c_linear_search_#in~n|))) (let ((.cse8 (div (+ .cse15 .cse20 6) 8589934592)) (.cse19 (div (+ .cse7 .cse20 (- 5)) 2))) (let ((.cse16 (* (- 2) |c_linear_search_#in~n|)) (.cse11 (div (+ (* 6 c_linear_search_~j~0) (* (- 85899345920) .cse5) (* (- 6) |c_linear_search_#in~n|) (* (- 51539607552) .cse8) (* 12 .cse19) 38) 3)) (.cse12 (* 17179869184 .cse5)) (.cse13 (* 2 |c_linear_search_#in~n|)) (.cse3 (div (+ (* 2147483647 c_linear_search_~j~0) (* (- 36893488138829168640) .cse5) (* (- 2147483647) |c_linear_search_#in~n|) (* 4294967296 .cse19) 18446744082299486210) 18446744069414584320))) (let ((.cse4 (+ .cse11 .cse12 .cse13 (* 17179869184 .cse3))) (.cse6 (* (- 1) c_linear_search_~j~0)) (.cse0 (select |c_#memory_int| |c_linear_search_#in~a.base|)) (.cse1 (- (* (- 17179869184) .cse5))) (.cse2 (- .cse16))) (and (or (not (= |c_linear_search_#in~q| (select .cse0 (+ .cse1 .cse2 (- (* (- 17179869184) .cse3)))))) (< .cse4 0)) (<= .cse4 0) (<= (+ (* 8589934592 .cse5) |c_linear_search_#in~n| (* 8589934592 .cse3)) 6) (<= 0 (+ (* 2 (div (+ .cse6 .cse7 (* 4294967296 .cse8) (- 1)) 2)) |c_linear_search_#in~n| 4)) (let ((.cse14 (* 2 c_linear_search_~j~0))) (or (let ((.cse9 (div (+ .cse14 .cse15 .cse16 8589934585) 8589934592))) (let ((.cse10 (+ (* 17179869184 .cse9) .cse11 .cse12 .cse13))) (and (<= 0 (+ |c_linear_search_#in~n| (* 2 (div (+ .cse6 (* 4294967296 .cse9) .cse7 (- 1)) 2)) 4)) (or (< .cse10 0) (not (= (select .cse0 (+ (- (* (- 17179869184) .cse9)) .cse1 .cse2)) |c_linear_search_#in~q|))) (<= .cse10 0)))) (let ((.cse18 (div (+ .cse14 .cse15 .cse16 17179869177) 8589934592))) (let ((.cse17 (+ .cse11 .cse12 .cse13 (* 17179869184 .cse18)))) (and (or (< .cse17 0) (not (= (select .cse0 (+ .cse1 .cse2 (- (* (- 17179869184) .cse18)))) |c_linear_search_#in~q|))) (<= .cse17 0))))))))))) (<= .cse21 0)) (or (<= 0 .cse5) (< 0 .cse21))))) is different from false [2019-09-16 16:16:07,121 WARN L191 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 70 [2019-09-16 16:16:07,136 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 50 refuted. 1 times theorem prover too weak. 0 trivial. 12 not checked. [2019-09-16 16:16:07,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:16:07,137 INFO L224 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:16:07,160 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-16 16:16:21,740 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-16 16:16:21,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:16:21,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 62 conjunts are in the unsatisfiable core [2019-09-16 16:16:21,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:16:21,762 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:16:42,330 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 30 DAG size of output: 13 [2019-09-16 16:16:42,346 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-09-16 16:16:42,346 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-16 16:16:42,429 INFO L567 ElimStorePlain]: treesize reduction 296, result has 13.5 percent of original size [2019-09-16 16:16:42,430 INFO L464 ElimStorePlain]: Eliminatee v_prenex_21 vanished before elimination [2019-09-16 16:16:42,434 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-09-16 16:16:42,434 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-16 16:16:42,450 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-16 16:16:42,450 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_10| vanished before elimination [2019-09-16 16:16:42,451 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-09-16 16:16:42,451 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:419, output treesize:42 [2019-09-16 16:16:46,724 WARN L191 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-09-16 16:16:46,980 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2019-09-16 16:16:47,464 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2019-09-16 16:16:48,108 WARN L191 SmtUtils]: Spent 568.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-09-16 16:16:49,515 WARN L191 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2019-09-16 16:16:53,310 WARN L191 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2019-09-16 16:16:56,756 WARN L191 SmtUtils]: Spent 3.00 s on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2019-09-16 16:17:00,549 WARN L191 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2019-09-16 16:17:01,073 WARN L191 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2019-09-16 16:17:04,879 WARN L191 SmtUtils]: Spent 3.49 s on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2019-09-16 16:17:05,504 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2019-09-16 16:17:05,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:17:06,801 WARN L191 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2019-09-16 16:17:07,658 WARN L191 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2019-09-16 16:17:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (8)] Exception during sending of exit command (exit): Broken pipe [2019-09-16 16:17:07,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:17:07,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2019-09-16 16:17:07,701 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-16 16:17:07,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-16 16:17:07,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1003, Unknown=16, NotChecked=130, Total=1260 [2019-09-16 16:17:07,703 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 36 states. [2019-09-16 16:17:10,167 WARN L191 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2019-09-16 16:17:13,097 WARN L191 SmtUtils]: Spent 2.71 s on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2019-09-16 16:17:14,006 WARN L191 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-09-16 16:17:20,174 WARN L191 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 149 DAG size of output: 60 [2019-09-16 16:17:21,755 WARN L191 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2019-09-16 16:17:22,696 WARN L191 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2019-09-16 16:17:26,218 WARN L191 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 159 DAG size of output: 69 [2019-09-16 16:17:27,378 WARN L191 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 65 [2019-09-16 16:17:58,063 WARN L191 SmtUtils]: Spent 22.80 s on a formula simplification. DAG size of input: 251 DAG size of output: 74 [2019-09-16 16:18:05,041 WARN L191 SmtUtils]: Spent 5.66 s on a formula simplification. DAG size of input: 167 DAG size of output: 76 [2019-09-16 16:18:05,396 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2019-09-16 16:18:08,082 WARN L191 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 114 DAG size of output: 85 [2019-09-16 16:18:12,097 WARN L191 SmtUtils]: Spent 3.80 s on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2019-09-16 16:18:12,729 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2019-09-16 16:18:15,494 WARN L191 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 132 DAG size of output: 121 [2019-09-16 16:18:23,224 WARN L191 SmtUtils]: Spent 3.60 s on a formula simplification. DAG size of input: 215 DAG size of output: 135 [2019-09-16 16:18:27,302 WARN L191 SmtUtils]: Spent 3.29 s on a formula simplification. DAG size of input: 141 DAG size of output: 106 [2019-09-16 16:19:20,813 WARN L191 SmtUtils]: Spent 22.35 s on a formula simplification. DAG size of input: 229 DAG size of output: 135 [2019-09-16 16:19:50,645 WARN L191 SmtUtils]: Spent 20.18 s on a formula simplification. DAG size of input: 325 DAG size of output: 125 [2019-09-16 16:20:18,733 WARN L191 SmtUtils]: Spent 21.33 s on a formula simplification. DAG size of input: 278 DAG size of output: 134 [2019-09-16 16:20:20,742 WARN L191 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 192 DAG size of output: 107 [2019-09-16 16:20:22,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:20:22,426 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-09-16 16:20:22,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-16 16:20:22,426 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 38 [2019-09-16 16:20:22,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:20:22,427 INFO L225 Difference]: With dead ends: 53 [2019-09-16 16:20:22,427 INFO L226 Difference]: Without dead ends: 43 [2019-09-16 16:20:22,429 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 305.9s TimeCoverageRelationStatistics Valid=354, Invalid=2810, Unknown=36, NotChecked=222, Total=3422 [2019-09-16 16:20:22,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-16 16:20:22,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-09-16 16:20:22,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-16 16:20:22,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-09-16 16:20:22,437 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 38 [2019-09-16 16:20:22,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:20:22,437 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-09-16 16:20:22,437 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-16 16:20:22,437 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-09-16 16:20:22,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-16 16:20:22,438 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:20:22,438 INFO L407 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:20:22,439 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:20:22,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:20:22,439 INFO L82 PathProgramCache]: Analyzing trace with hash 13919383, now seen corresponding path program 7 times [2019-09-16 16:20:22,439 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:20:22,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:20:22,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:20:22,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:20:22,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:20:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:20:25,009 WARN L191 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 197 DAG size of output: 31 [2019-09-16 16:20:25,310 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2019-09-16 16:20:25,469 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2019-09-16 16:20:25,662 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 45 [2019-09-16 16:20:25,906 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 68 [2019-09-16 16:20:26,124 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2019-09-16 16:20:26,379 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2019-09-16 16:20:26,934 WARN L191 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2019-09-16 16:20:27,179 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2019-09-16 16:20:27,370 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 55 [2019-09-16 16:20:27,570 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2019-09-16 16:20:27,830 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2019-09-16 16:20:28,848 WARN L191 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 47 [2019-09-16 16:20:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:20:28,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:20:28,864 INFO L224 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:20:28,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:20:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:20:29,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 57 conjunts are in the unsatisfiable core [2019-09-16 16:20:29,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:20:29,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:20:53,234 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 30 DAG size of output: 13 [2019-09-16 16:20:53,254 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-09-16 16:20:53,255 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-16 16:20:55,342 WARN L191 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2019-09-16 16:20:55,343 INFO L567 ElimStorePlain]: treesize reduction 270, result has 12.6 percent of original size [2019-09-16 16:20:55,343 INFO L464 ElimStorePlain]: Eliminatee v_prenex_25 vanished before elimination [2019-09-16 16:20:55,346 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-09-16 16:20:55,347 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-16 16:20:55,362 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-16 16:20:55,362 INFO L464 ElimStorePlain]: Eliminatee v_prenex_23 vanished before elimination [2019-09-16 16:20:55,363 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-16 16:20:55,363 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:377, output treesize:35 [2019-09-16 16:20:55,866 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2019-09-16 16:20:56,205 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2019-09-16 16:20:58,190 WARN L191 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2019-09-16 16:20:59,098 WARN L191 SmtUtils]: Spent 825.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2019-09-16 16:21:00,303 WARN L191 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2019-09-16 16:21:03,623 WARN L191 SmtUtils]: Spent 2.78 s on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2019-09-16 16:21:03,943 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2019-09-16 16:21:05,267 WARN L191 SmtUtils]: Spent 802.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-09-16 16:21:05,987 WARN L191 SmtUtils]: Spent 571.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2019-09-16 16:21:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:21:06,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:21:06,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2019-09-16 16:21:06,016 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-16 16:21:06,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-16 16:21:06,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1210, Unknown=11, NotChecked=0, Total=1332 [2019-09-16 16:21:06,017 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 37 states. [2019-09-16 16:21:08,120 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 20 [2019-09-16 16:21:09,378 WARN L191 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2019-09-16 16:21:12,158 WARN L191 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2019-09-16 16:21:14,695 WARN L191 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2019-09-16 16:21:15,371 WARN L191 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2019-09-16 16:21:16,717 WARN L191 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2019-09-16 16:21:19,740 WARN L191 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2019-09-16 16:21:21,990 WARN L191 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2019-09-16 16:21:24,629 WARN L191 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 119 DAG size of output: 83 [2019-09-16 16:21:27,576 WARN L191 SmtUtils]: Spent 2.82 s on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2019-09-16 16:21:28,068 WARN L191 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 112 [2019-09-16 16:21:30,537 WARN L191 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 125 DAG size of output: 109 [2019-09-16 16:21:32,842 WARN L191 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 120 DAG size of output: 99 [2019-09-16 16:21:34,187 WARN L191 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 149 DAG size of output: 107 [2019-09-16 16:21:34,602 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 104 [2019-09-16 16:21:35,618 WARN L191 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2019-09-16 16:21:36,687 WARN L191 SmtUtils]: Spent 916.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 101 [2019-09-16 16:21:37,799 WARN L191 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 66 [2019-09-16 16:21:39,635 WARN L191 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 128 DAG size of output: 75 [2019-09-16 16:21:40,322 WARN L191 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 87 [2019-09-16 16:21:41,432 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 73 [2019-09-16 16:21:42,523 WARN L191 SmtUtils]: Spent 920.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 74 [2019-09-16 16:21:45,009 WARN L191 SmtUtils]: Spent 2.38 s on a formula simplification that was a NOOP. DAG size: 91 [2019-09-16 16:21:45,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:21:45,151 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-09-16 16:21:45,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-16 16:21:45,152 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 41 [2019-09-16 16:21:45,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:21:45,154 INFO L225 Difference]: With dead ends: 56 [2019-09-16 16:21:45,154 INFO L226 Difference]: Without dead ends: 46 [2019-09-16 16:21:45,156 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 78.0s TimeCoverageRelationStatistics Valid=378, Invalid=3393, Unknown=11, NotChecked=0, Total=3782 [2019-09-16 16:21:45,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-16 16:21:45,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2019-09-16 16:21:45,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-16 16:21:45,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-09-16 16:21:45,164 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 41 [2019-09-16 16:21:45,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:21:45,164 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-09-16 16:21:45,164 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-16 16:21:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-09-16 16:21:45,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-16 16:21:45,165 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:21:45,165 INFO L407 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:21:45,166 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:21:45,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:21:45,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1873128100, now seen corresponding path program 8 times [2019-09-16 16:21:45,166 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:21:45,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:21:45,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:21:45,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:21:45,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:21:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:21:45,593 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 33 [2019-09-16 16:21:46,496 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2019-09-16 16:21:47,045 WARN L191 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2019-09-16 16:21:48,127 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 49 [2019-09-16 16:21:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:21:48,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:21:48,141 INFO L224 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:21:48,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-16 16:21:48,365 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:21:48,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:21:48,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 70 conjunts are in the unsatisfiable core [2019-09-16 16:21:48,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:21:48,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:21:54,538 WARN L191 SmtUtils]: Spent 6.08 s on a formula simplification. DAG size of input: 36 DAG size of output: 17 [2019-09-16 16:21:54,572 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-09-16 16:21:54,573 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-16 16:21:54,600 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-09-16 16:21:54,600 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-16 16:21:58,699 WARN L191 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 61 DAG size of output: 31 [2019-09-16 16:21:58,699 INFO L567 ElimStorePlain]: treesize reduction 232, result has 15.9 percent of original size [2019-09-16 16:21:58,700 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_12| vanished before elimination [2019-09-16 16:21:58,703 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-09-16 16:21:58,704 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-09-16 16:21:58,718 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-16 16:21:58,719 INFO L464 ElimStorePlain]: Eliminatee v_prenex_28 vanished before elimination [2019-09-16 16:21:58,719 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-16 16:21:58,720 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:407, output treesize:40 [2019-09-16 16:22:01,961 WARN L191 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 44 [2019-09-16 16:22:02,714 WARN L191 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2019-09-16 16:22:04,331 WARN L191 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2019-09-16 16:22:06,855 WARN L191 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2019-09-16 16:22:07,810 WARN L191 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2019-09-16 16:22:12,676 WARN L191 SmtUtils]: Spent 4.49 s on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2019-09-16 16:22:13,436 WARN L191 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2019-09-16 16:22:15,598 WARN L191 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 63 [2019-09-16 16:22:19,850 WARN L191 SmtUtils]: Spent 3.79 s on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2019-09-16 16:22:20,747 WARN L191 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2019-09-16 16:22:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:22:20,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:22:20,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 42 [2019-09-16 16:22:20,782 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-16 16:22:20,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-16 16:22:20,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1594, Unknown=1, NotChecked=0, Total=1722 [2019-09-16 16:22:20,783 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 42 states. [2019-09-16 16:22:23,305 WARN L191 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-09-16 16:22:25,877 WARN L191 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2019-09-16 16:22:26,079 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2019-09-16 16:22:26,928 WARN L191 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2019-09-16 16:22:27,235 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2019-09-16 16:22:31,097 WARN L191 SmtUtils]: Spent 3.75 s on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2019-09-16 16:22:32,646 WARN L191 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2019-09-16 16:22:36,018 WARN L191 SmtUtils]: Spent 3.00 s on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-09-16 16:22:39,051 WARN L191 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2019-09-16 16:22:39,846 WARN L191 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-09-16 16:22:40,395 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2019-09-16 16:22:40,964 WARN L191 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 74 [2019-09-16 16:22:41,224 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2019-09-16 16:22:41,660 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-09-16 16:22:42,690 WARN L191 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2019-09-16 16:22:43,130 WARN L191 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 94 [2019-09-16 16:22:44,473 WARN L191 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 120 DAG size of output: 97 [2019-09-16 16:22:45,814 WARN L191 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2019-09-16 16:22:48,254 WARN L191 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 137 DAG size of output: 92 [2019-09-16 16:22:50,631 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 172 DAG size of output: 89 [2019-09-16 16:22:52,197 WARN L191 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 166 DAG size of output: 86 [2019-09-16 16:22:53,046 WARN L191 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 86 [2019-09-16 16:22:53,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:22:53,164 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-09-16 16:22:53,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-16 16:22:53,165 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 44 [2019-09-16 16:22:53,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:22:53,166 INFO L225 Difference]: With dead ends: 59 [2019-09-16 16:22:53,166 INFO L226 Difference]: Without dead ends: 49 [2019-09-16 16:22:53,169 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 59.7s TimeCoverageRelationStatistics Valid=400, Invalid=4021, Unknown=1, NotChecked=0, Total=4422 [2019-09-16 16:22:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-16 16:22:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-09-16 16:22:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-16 16:22:53,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-09-16 16:22:53,177 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 44 [2019-09-16 16:22:53,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:22:53,178 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-09-16 16:22:53,178 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-16 16:22:53,178 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-09-16 16:22:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-16 16:22:53,179 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:22:53,179 INFO L407 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:22:53,179 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:22:53,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:22:53,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1661767031, now seen corresponding path program 9 times [2019-09-16 16:22:53,180 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:22:53,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:22:53,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:22:53,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:22:53,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:22:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:22:53,935 WARN L191 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 40 [2019-09-16 16:22:55,220 WARN L191 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 94 [2019-09-16 16:22:55,725 WARN L191 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 84 [2019-09-16 16:23:19,930 WARN L191 SmtUtils]: Spent 23.26 s on a formula simplification. DAG size of input: 120 DAG size of output: 103 [2019-09-16 16:23:20,391 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 67 [2019-09-16 16:23:21,015 WARN L191 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 66 [2019-09-16 16:23:21,897 WARN L191 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 52 [2019-09-16 16:23:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:23:21,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:23:21,915 INFO L224 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:23:21,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 16:24:10,626 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-16 16:24:10,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:24:10,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 78 conjunts are in the unsatisfiable core [2019-09-16 16:24:10,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:24:10,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:24:16,896 WARN L191 SmtUtils]: Spent 6.08 s on a formula simplification. DAG size of input: 36 DAG size of output: 17 [2019-09-16 16:24:16,919 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-09-16 16:24:16,919 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-16 16:24:16,932 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-09-16 16:24:16,932 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-16 16:24:21,035 WARN L191 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 61 DAG size of output: 31 [2019-09-16 16:24:21,036 INFO L567 ElimStorePlain]: treesize reduction 232, result has 15.9 percent of original size [2019-09-16 16:24:21,044 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-09-16 16:24:21,045 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-09-16 16:24:21,060 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-16 16:24:21,060 INFO L464 ElimStorePlain]: Eliminatee v_prenex_34 vanished before elimination [2019-09-16 16:24:21,061 INFO L464 ElimStorePlain]: Eliminatee v_prenex_33 vanished before elimination [2019-09-16 16:24:21,061 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-16 16:24:21,061 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:407, output treesize:40 [2019-09-16 16:24:23,526 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2019-09-16 16:24:24,776 WARN L191 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2019-09-16 16:24:28,197 WARN L191 SmtUtils]: Spent 2.72 s on a formula simplification that was a NOOP. DAG size: 53 [2019-09-16 16:24:29,297 WARN L191 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2019-09-16 16:24:30,270 WARN L191 SmtUtils]: Spent 705.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2019-09-16 16:24:31,197 WARN L191 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2019-09-16 16:24:33,460 WARN L191 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 61 [2019-09-16 16:24:35,990 WARN L191 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2019-09-16 16:24:39,873 WARN L191 SmtUtils]: Spent 3.60 s on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2019-09-16 16:24:40,612 WARN L191 SmtUtils]: Spent 608.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2019-09-16 16:24:45,378 WARN L191 SmtUtils]: Spent 4.26 s on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2019-09-16 16:24:45,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:24:45,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:24:45,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:24:45,382 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:24:45,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:24:48,993 WARN L191 SmtUtils]: Spent 3.25 s on a formula simplification. DAG size of input: 99 DAG size of output: 80 [2019-09-16 16:24:51,906 WARN L191 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2019-09-16 16:24:53,593 WARN L191 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2019-09-16 16:24:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:24:53,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:24:53,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 45 [2019-09-16 16:24:53,638 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-16 16:24:53,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-16 16:24:53,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1831, Unknown=1, NotChecked=0, Total=1980 [2019-09-16 16:24:53,639 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 45 states. [2019-09-16 16:24:56,010 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2019-09-16 16:24:58,656 WARN L191 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2019-09-16 16:25:02,191 WARN L191 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2019-09-16 16:25:02,573 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2019-09-16 16:25:06,673 WARN L191 SmtUtils]: Spent 3.30 s on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2019-09-16 16:25:10,039 WARN L191 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-09-16 16:25:12,778 WARN L191 SmtUtils]: Spent 2.61 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2019-09-16 16:25:13,801 WARN L191 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2019-09-16 16:25:16,028 WARN L191 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2019-09-16 16:25:19,267 WARN L191 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2019-09-16 16:25:22,546 WARN L191 SmtUtils]: Spent 3.09 s on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2019-09-16 16:25:27,131 WARN L191 SmtUtils]: Spent 3.56 s on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2019-09-16 16:25:27,463 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2019-09-16 16:25:32,223 WARN L191 SmtUtils]: Spent 4.47 s on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2019-09-16 16:25:33,832 WARN L191 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 179 DAG size of output: 86 [2019-09-16 16:25:34,360 WARN L191 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2019-09-16 16:25:39,741 WARN L191 SmtUtils]: Spent 5.22 s on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2019-09-16 16:25:42,116 WARN L191 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2019-09-16 16:25:42,471 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2019-09-16 16:25:42,687 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 73 [2019-09-16 16:25:43,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:25:43,780 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2019-09-16 16:25:43,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-16 16:25:43,781 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 47 [2019-09-16 16:25:43,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:25:43,782 INFO L225 Difference]: With dead ends: 62 [2019-09-16 16:25:43,782 INFO L226 Difference]: Without dead ends: 52 [2019-09-16 16:25:43,784 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 110.4s TimeCoverageRelationStatistics Valid=405, Invalid=4286, Unknown=1, NotChecked=0, Total=4692 [2019-09-16 16:25:43,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-16 16:25:43,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-09-16 16:25:43,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-16 16:25:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-09-16 16:25:43,794 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 47 [2019-09-16 16:25:43,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:25:43,795 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-09-16 16:25:43,795 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-16 16:25:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-09-16 16:25:43,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-16 16:25:43,795 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:25:43,796 INFO L407 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:25:43,796 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:25:43,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:25:43,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1426216388, now seen corresponding path program 10 times [2019-09-16 16:25:43,796 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:25:43,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:25:43,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:25:43,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:25:43,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:25:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat