java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/phases_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 19:37:17,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 19:37:17,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 19:37:17,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 19:37:17,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 19:37:17,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 19:37:17,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 19:37:17,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 19:37:17,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 19:37:17,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 19:37:17,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 19:37:17,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 19:37:17,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 19:37:17,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 19:37:17,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 19:37:17,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 19:37:17,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 19:37:17,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 19:37:17,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 19:37:17,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 19:37:17,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 19:37:17,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 19:37:17,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 19:37:17,793 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 19:37:17,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 19:37:17,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 19:37:17,798 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 19:37:17,799 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 19:37:17,799 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 19:37:17,800 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 19:37:17,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 19:37:17,801 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 19:37:17,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 19:37:17,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 19:37:17,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 19:37:17,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 19:37:17,803 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-03 19:37:17,817 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 19:37:17,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 19:37:17,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 19:37:17,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 19:37:17,819 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 19:37:17,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 19:37:17,819 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 19:37:17,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 19:37:17,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 19:37:17,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 19:37:17,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 19:37:17,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 19:37:17,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 19:37:17,820 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 19:37:17,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 19:37:17,821 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 19:37:17,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 19:37:17,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 19:37:17,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 19:37:17,822 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 19:37:17,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 19:37:17,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 19:37:17,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 19:37:17,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 19:37:17,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 19:37:17,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 19:37:17,823 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 19:37:17,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 19:37:17,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 19:37:17,861 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 19:37:17,878 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 19:37:17,881 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 19:37:17,882 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 19:37:17,883 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 19:37:17,883 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_1-2.c [2019-09-03 19:37:17,955 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a32a8cbe5/dd8b7bce0f114cbcbcf778c8465c816f/FLAGc17631d55 [2019-09-03 19:37:18,361 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 19:37:18,362 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_1-2.c [2019-09-03 19:37:18,368 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a32a8cbe5/dd8b7bce0f114cbcbcf778c8465c816f/FLAGc17631d55 [2019-09-03 19:37:18,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a32a8cbe5/dd8b7bce0f114cbcbcf778c8465c816f [2019-09-03 19:37:18,775 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 19:37:18,776 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 19:37:18,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 19:37:18,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 19:37:18,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 19:37:18,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:37:18" (1/1) ... [2019-09-03 19:37:18,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7af1abad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:37:18, skipping insertion in model container [2019-09-03 19:37:18,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:37:18" (1/1) ... [2019-09-03 19:37:18,791 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 19:37:18,807 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 19:37:19,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:37:19,004 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 19:37:19,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:37:19,030 INFO L192 MainTranslator]: Completed translation [2019-09-03 19:37:19,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:37:19 WrapperNode [2019-09-03 19:37:19,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 19:37:19,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 19:37:19,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 19:37:19,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 19:37:19,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:37:19" (1/1) ... [2019-09-03 19:37:19,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:37:19" (1/1) ... [2019-09-03 19:37:19,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:37:19" (1/1) ... [2019-09-03 19:37:19,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:37:19" (1/1) ... [2019-09-03 19:37:19,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:37:19" (1/1) ... [2019-09-03 19:37:19,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:37:19" (1/1) ... [2019-09-03 19:37:19,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:37:19" (1/1) ... [2019-09-03 19:37:19,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 19:37:19,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 19:37:19,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 19:37:19,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 19:37:19,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:37:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 19:37:19,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 19:37:19,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 19:37:19,194 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 19:37:19,194 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 19:37:19,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 19:37:19,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 19:37:19,195 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 19:37:19,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 19:37:19,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 19:37:19,346 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 19:37:19,346 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 19:37:19,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:37:19 BoogieIcfgContainer [2019-09-03 19:37:19,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 19:37:19,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 19:37:19,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 19:37:19,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 19:37:19,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 07:37:18" (1/3) ... [2019-09-03 19:37:19,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5819e887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:37:19, skipping insertion in model container [2019-09-03 19:37:19,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:37:19" (2/3) ... [2019-09-03 19:37:19,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5819e887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:37:19, skipping insertion in model container [2019-09-03 19:37:19,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:37:19" (3/3) ... [2019-09-03 19:37:19,356 INFO L109 eAbstractionObserver]: Analyzing ICFG phases_1-2.c [2019-09-03 19:37:19,365 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 19:37:19,372 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 19:37:19,387 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 19:37:19,415 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 19:37:19,415 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 19:37:19,416 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 19:37:19,416 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 19:37:19,416 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 19:37:19,416 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 19:37:19,416 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 19:37:19,416 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 19:37:19,417 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 19:37:19,432 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-09-03 19:37:19,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 19:37:19,436 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:37:19,437 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:37:19,439 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:37:19,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:37:19,443 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2019-09-03 19:37:19,445 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:37:19,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:37:19,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:19,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:37:19,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:37:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:37:19,539 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:37:19,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 19:37:19,543 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 19:37:19,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 19:37:19,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 19:37:19,557 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2019-09-03 19:37:19,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:37:19,573 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2019-09-03 19:37:19,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 19:37:19,574 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 19:37:19,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:37:19,580 INFO L225 Difference]: With dead ends: 29 [2019-09-03 19:37:19,581 INFO L226 Difference]: Without dead ends: 12 [2019-09-03 19:37:19,583 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 19:37:19,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-09-03 19:37:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-09-03 19:37:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-09-03 19:37:19,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-09-03 19:37:19,614 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2019-09-03 19:37:19,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:37:19,615 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-09-03 19:37:19,615 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 19:37:19,616 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-09-03 19:37:19,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 19:37:19,616 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:37:19,616 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:37:19,617 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:37:19,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:37:19,617 INFO L82 PathProgramCache]: Analyzing trace with hash -730736584, now seen corresponding path program 1 times [2019-09-03 19:37:19,617 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:37:19,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:37:19,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:19,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:37:19,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:37:19,836 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2019-09-03 19:37:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:37:19,840 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:37:19,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 19:37:19,842 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 19:37:19,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 19:37:19,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 19:37:19,843 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2019-09-03 19:37:19,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:37:19,866 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2019-09-03 19:37:19,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 19:37:19,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-03 19:37:19,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:37:19,867 INFO L225 Difference]: With dead ends: 21 [2019-09-03 19:37:19,868 INFO L226 Difference]: Without dead ends: 14 [2019-09-03 19:37:19,869 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 19:37:19,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-03 19:37:19,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-03 19:37:19,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-03 19:37:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-09-03 19:37:19,873 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-09-03 19:37:19,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:37:19,874 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-09-03 19:37:19,874 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 19:37:19,874 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-09-03 19:37:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-03 19:37:19,875 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:37:19,875 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:37:19,875 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:37:19,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:37:19,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1082855947, now seen corresponding path program 1 times [2019-09-03 19:37:19,876 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:37:19,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:37:19,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:19,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:37:19,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:37:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:37:19,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:37:19,998 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -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 [2019-09-03 19:37:20,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:37:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:37:20,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-03 19:37:20,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:37:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:37:20,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:37:20,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-03 19:37:20,087 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 19:37:20,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 19:37:20,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-03 19:37:20,088 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-09-03 19:37:20,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:37:20,129 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-09-03 19:37:20,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-03 19:37:20,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-09-03 19:37:20,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:37:20,132 INFO L225 Difference]: With dead ends: 23 [2019-09-03 19:37:20,133 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 19:37:20,135 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-03 19:37:20,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 19:37:20,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-03 19:37:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 19:37:20,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-09-03 19:37:20,142 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2019-09-03 19:37:20,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:37:20,143 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-09-03 19:37:20,143 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 19:37:20,144 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-09-03 19:37:20,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-03 19:37:20,144 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:37:20,145 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:37:20,145 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:37:20,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:37:20,145 INFO L82 PathProgramCache]: Analyzing trace with hash -167147406, now seen corresponding path program 2 times [2019-09-03 19:37:20,146 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:37:20,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:37:20,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:20,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:37:20,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:37:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:37:20,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:37:20,266 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:37:20,279 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:37:20,293 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:37:20,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:37:20,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-03 19:37:20,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:37:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:37:20,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:37:20,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-03 19:37:20,321 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 19:37:20,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 19:37:20,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-03 19:37:20,322 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2019-09-03 19:37:20,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:37:20,371 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2019-09-03 19:37:20,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 19:37:20,372 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-09-03 19:37:20,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:37:20,373 INFO L225 Difference]: With dead ends: 25 [2019-09-03 19:37:20,373 INFO L226 Difference]: Without dead ends: 18 [2019-09-03 19:37:20,373 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-03 19:37:20,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-03 19:37:20,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-03 19:37:20,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-03 19:37:20,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-03 19:37:20,378 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2019-09-03 19:37:20,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:37:20,379 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-03 19:37:20,379 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 19:37:20,379 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-03 19:37:20,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 19:37:20,380 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:37:20,380 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:37:20,381 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:37:20,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:37:20,381 INFO L82 PathProgramCache]: Analyzing trace with hash -639535185, now seen corresponding path program 3 times [2019-09-03 19:37:20,381 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:37:20,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:37:20,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:20,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:37:20,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:37:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:37:20,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:37:20,531 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:37:20,548 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:37:20,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-03 19:37:20,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:37:20,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-03 19:37:20,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:37:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-03 19:37:20,584 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-03 19:37:20,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-09-03 19:37:20,585 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 19:37:20,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 19:37:20,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:37:20,586 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2019-09-03 19:37:20,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:37:20,671 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2019-09-03 19:37:20,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 19:37:20,672 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-09-03 19:37:20,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:37:20,673 INFO L225 Difference]: With dead ends: 29 [2019-09-03 19:37:20,673 INFO L226 Difference]: Without dead ends: 22 [2019-09-03 19:37:20,674 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-09-03 19:37:20,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-03 19:37:20,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-09-03 19:37:20,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-03 19:37:20,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-03 19:37:20,679 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2019-09-03 19:37:20,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:37:20,679 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-03 19:37:20,680 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 19:37:20,680 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-03 19:37:20,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-03 19:37:20,681 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:37:20,681 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:37:20,681 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:37:20,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:37:20,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1988642215, now seen corresponding path program 1 times [2019-09-03 19:37:20,682 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:37:20,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:37:20,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:20,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:37:20,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:37:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:37:20,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:37:20,833 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:37:20,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:37:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:37:20,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-03 19:37:20,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:37:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:37:20,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:37:20,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-03 19:37:20,910 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 19:37:20,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 19:37:20,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-03 19:37:20,911 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2019-09-03 19:37:20,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:37:20,984 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2019-09-03 19:37:20,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 19:37:20,985 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-09-03 19:37:20,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:37:20,986 INFO L225 Difference]: With dead ends: 31 [2019-09-03 19:37:20,986 INFO L226 Difference]: Without dead ends: 23 [2019-09-03 19:37:20,987 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-03 19:37:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-03 19:37:20,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-03 19:37:20,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-03 19:37:20,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-09-03 19:37:20,991 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2019-09-03 19:37:20,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:37:20,992 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-09-03 19:37:20,992 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 19:37:20,992 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-09-03 19:37:20,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-03 19:37:20,993 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:37:20,993 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:37:20,993 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:37:20,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:37:20,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1766658852, now seen corresponding path program 2 times [2019-09-03 19:37:20,994 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:37:20,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:37:20,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:20,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:37:20,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:37:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:37:21,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:37:21,139 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -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 [2019-09-03 19:37:21,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:37:21,176 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:37:21,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:37:21,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 19:37:21,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:37:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:37:21,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:37:21,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2019-09-03 19:37:21,224 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 19:37:21,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 19:37:21,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-03 19:37:21,225 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-09-03 19:37:21,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:37:21,340 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-09-03 19:37:21,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 19:37:21,341 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-09-03 19:37:21,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:37:21,342 INFO L225 Difference]: With dead ends: 33 [2019-09-03 19:37:21,342 INFO L226 Difference]: Without dead ends: 25 [2019-09-03 19:37:21,343 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-03 19:37:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-03 19:37:21,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-09-03 19:37:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-03 19:37:21,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-09-03 19:37:21,354 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2019-09-03 19:37:21,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:37:21,355 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-09-03 19:37:21,355 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 19:37:21,355 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-09-03 19:37:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-03 19:37:21,356 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:37:21,357 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:37:21,357 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:37:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:37:21,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1105955487, now seen corresponding path program 3 times [2019-09-03 19:37:21,357 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:37:21,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:37:21,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:21,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:37:21,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:37:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:37:21,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:37:21,553 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:37:21,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:37:21,582 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-03 19:37:21,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:37:21,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-03 19:37:21,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:37:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-09-03 19:37:21,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:37:21,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 11 [2019-09-03 19:37:21,630 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 19:37:21,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 19:37:21,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-09-03 19:37:21,631 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2019-09-03 19:37:23,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:37:23,183 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2019-09-03 19:37:23,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-03 19:37:23,183 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-09-03 19:37:23,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:37:23,184 INFO L225 Difference]: With dead ends: 40 [2019-09-03 19:37:23,185 INFO L226 Difference]: Without dead ends: 32 [2019-09-03 19:37:23,185 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2019-09-03 19:37:23,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-03 19:37:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2019-09-03 19:37:23,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-03 19:37:23,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-09-03 19:37:23,191 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2019-09-03 19:37:23,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:37:23,191 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-09-03 19:37:23,192 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 19:37:23,192 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-09-03 19:37:23,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-03 19:37:23,193 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:37:23,193 INFO L399 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:37:23,193 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:37:23,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:37:23,194 INFO L82 PathProgramCache]: Analyzing trace with hash -806317607, now seen corresponding path program 4 times [2019-09-03 19:37:23,194 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:37:23,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:37:23,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:23,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:37:23,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:37:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 19:37:23,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:37:23,374 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:37:23,396 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:37:23,411 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:37:23,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:37:23,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-03 19:37:23,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:37:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 19:37:23,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:37:23,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-03 19:37:23,467 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 19:37:23,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 19:37:23,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-03 19:37:23,470 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 11 states. [2019-09-03 19:37:23,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:37:23,597 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2019-09-03 19:37:23,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 19:37:23,597 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-09-03 19:37:23,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:37:23,598 INFO L225 Difference]: With dead ends: 41 [2019-09-03 19:37:23,598 INFO L226 Difference]: Without dead ends: 31 [2019-09-03 19:37:23,599 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-03 19:37:23,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-03 19:37:23,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-09-03 19:37:23,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-03 19:37:23,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-09-03 19:37:23,604 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2019-09-03 19:37:23,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:37:23,604 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-09-03 19:37:23,604 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 19:37:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-09-03 19:37:23,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-03 19:37:23,605 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:37:23,606 INFO L399 BasicCegarLoop]: trace histogram [10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:37:23,606 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:37:23,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:37:23,606 INFO L82 PathProgramCache]: Analyzing trace with hash -251489706, now seen corresponding path program 5 times [2019-09-03 19:37:23,606 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:37:23,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:37:23,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:23,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:37:23,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:37:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 19:37:23,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:37:23,756 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -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 [2019-09-03 19:37:23,771 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:37:49,303 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-09-03 19:37:49,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:37:49,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-03 19:37:49,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:37:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:37:49,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:37:49,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 13 [2019-09-03 19:37:49,437 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 19:37:49,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 19:37:49,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-09-03 19:37:49,438 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 13 states. [2019-09-03 19:37:49,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:37:49,612 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-09-03 19:37:49,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 19:37:49,613 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2019-09-03 19:37:49,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:37:49,614 INFO L225 Difference]: With dead ends: 43 [2019-09-03 19:37:49,614 INFO L226 Difference]: Without dead ends: 33 [2019-09-03 19:37:49,615 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-09-03 19:37:49,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-03 19:37:49,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-09-03 19:37:49,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-03 19:37:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-09-03 19:37:49,619 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2019-09-03 19:37:49,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:37:49,620 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-09-03 19:37:49,620 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 19:37:49,620 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-09-03 19:37:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-03 19:37:49,621 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:37:49,621 INFO L399 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:37:49,621 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:37:49,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:37:49,622 INFO L82 PathProgramCache]: Analyzing trace with hash 362178451, now seen corresponding path program 6 times [2019-09-03 19:37:49,622 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:37:49,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:37:49,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:49,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:37:49,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:37:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 19:37:49,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:37:49,780 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:37:49,797 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:37:50,806 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-09-03 19:37:50,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:37:50,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-03 19:37:50,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:37:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-09-03 19:37:50,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:37:50,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-09-03 19:37:50,892 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 19:37:50,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 19:37:50,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-09-03 19:37:50,893 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 16 states. [2019-09-03 19:38:01,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:38:01,412 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2019-09-03 19:38:01,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-03 19:38:01,412 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2019-09-03 19:38:01,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:38:01,415 INFO L225 Difference]: With dead ends: 54 [2019-09-03 19:38:01,415 INFO L226 Difference]: Without dead ends: 44 [2019-09-03 19:38:01,417 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=115, Invalid=304, Unknown=1, NotChecked=0, Total=420 [2019-09-03 19:38:01,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-03 19:38:01,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2019-09-03 19:38:01,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-03 19:38:01,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2019-09-03 19:38:01,423 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 32 [2019-09-03 19:38:01,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:38:01,423 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2019-09-03 19:38:01,423 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 19:38:01,423 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2019-09-03 19:38:01,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-03 19:38:01,424 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:38:01,424 INFO L399 BasicCegarLoop]: trace histogram [13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:38:01,425 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:38:01,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:38:01,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1390824821, now seen corresponding path program 7 times [2019-09-03 19:38:01,425 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:38:01,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:38:01,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:38:01,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:38:01,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:38:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:38:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 19:38:01,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:38:01,604 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -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 [2019-09-03 19:38:01,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:38:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:38:01,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-03 19:38:01,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:38:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 19:38:01,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:38:01,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-03 19:38:01,681 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 19:38:01,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 19:38:01,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-09-03 19:38:01,682 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 14 states. [2019-09-03 19:38:01,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:38:01,903 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2019-09-03 19:38:01,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 19:38:01,904 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-09-03 19:38:01,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:38:01,905 INFO L225 Difference]: With dead ends: 51 [2019-09-03 19:38:01,905 INFO L226 Difference]: Without dead ends: 39 [2019-09-03 19:38:01,906 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-09-03 19:38:01,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-03 19:38:01,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-03 19:38:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-03 19:38:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2019-09-03 19:38:01,910 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 36 [2019-09-03 19:38:01,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:38:01,911 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2019-09-03 19:38:01,911 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 19:38:01,911 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2019-09-03 19:38:01,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-03 19:38:01,912 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:38:01,912 INFO L399 BasicCegarLoop]: trace histogram [14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:38:01,912 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:38:01,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:38:01,913 INFO L82 PathProgramCache]: Analyzing trace with hash 26600968, now seen corresponding path program 8 times [2019-09-03 19:38:01,913 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:38:01,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:38:01,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:38:01,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:38:01,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:38:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:38:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 60 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 19:38:02,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:38:02,109 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:38:02,120 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:38:02,151 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:38:02,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:38:02,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-03 19:38:02,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:38:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:38:02,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:38:02,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 18 [2019-09-03 19:38:02,297 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-03 19:38:02,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-03 19:38:02,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2019-09-03 19:38:02,300 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 18 states. [2019-09-03 19:38:02,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:38:02,601 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2019-09-03 19:38:02,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 19:38:02,602 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2019-09-03 19:38:02,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:38:02,603 INFO L225 Difference]: With dead ends: 53 [2019-09-03 19:38:02,603 INFO L226 Difference]: Without dead ends: 41 [2019-09-03 19:38:02,604 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2019-09-03 19:38:02,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-03 19:38:02,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-09-03 19:38:02,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-03 19:38:02,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2019-09-03 19:38:02,612 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 38 [2019-09-03 19:38:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:38:02,615 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2019-09-03 19:38:02,615 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-03 19:38:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2019-09-03 19:38:02,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-03 19:38:02,616 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:38:02,616 INFO L399 BasicCegarLoop]: trace histogram [15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:38:02,616 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:38:02,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:38:02,617 INFO L82 PathProgramCache]: Analyzing trace with hash 668151365, now seen corresponding path program 9 times [2019-09-03 19:38:02,617 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:38:02,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:38:02,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:38:02,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:38:02,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:38:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:38:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 65 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 19:38:02,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:38:02,848 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:38:02,861 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:38:02,887 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-09-03 19:38:02,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:38:02,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-03 19:38:02,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:38:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 84 proven. 9 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-09-03 19:38:02,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:38:02,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6] total 19 [2019-09-03 19:38:02,998 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 19:38:02,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 19:38:02,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-09-03 19:38:02,999 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 19 states. [2019-09-03 19:38:03,877 WARN L188 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2019-09-03 19:38:06,450 WARN L188 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 16 [2019-09-03 19:38:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:38:22,628 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2019-09-03 19:38:22,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 19:38:22,628 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 40 [2019-09-03 19:38:22,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:38:22,630 INFO L225 Difference]: With dead ends: 64 [2019-09-03 19:38:22,630 INFO L226 Difference]: Without dead ends: 52 [2019-09-03 19:38:22,631 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=155, Invalid=443, Unknown=2, NotChecked=0, Total=600 [2019-09-03 19:38:22,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-03 19:38:22,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2019-09-03 19:38:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-03 19:38:22,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-09-03 19:38:22,638 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 40 [2019-09-03 19:38:22,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:38:22,638 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-09-03 19:38:22,638 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 19:38:22,638 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-09-03 19:38:22,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-03 19:38:22,639 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:38:22,639 INFO L399 BasicCegarLoop]: trace histogram [17, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:38:22,639 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:38:22,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:38:22,640 INFO L82 PathProgramCache]: Analyzing trace with hash 2096596925, now seen corresponding path program 10 times [2019-09-03 19:38:22,640 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:38:22,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:38:22,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:38:22,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:38:22,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:38:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:38:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 98 proven. 182 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-03 19:38:22,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:38:22,907 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:38:22,924 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:38:22,948 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:38:22,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:38:22,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-03 19:38:22,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:38:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 98 proven. 182 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-03 19:38:23,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:38:23,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-03 19:38:23,005 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-03 19:38:23,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-03 19:38:23,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-09-03 19:38:23,006 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 17 states. [2019-09-03 19:38:23,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:38:23,337 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2019-09-03 19:38:23,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-03 19:38:23,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2019-09-03 19:38:23,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:38:23,338 INFO L225 Difference]: With dead ends: 61 [2019-09-03 19:38:23,339 INFO L226 Difference]: Without dead ends: 47 [2019-09-03 19:38:23,339 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-09-03 19:38:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-03 19:38:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-09-03 19:38:23,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-03 19:38:23,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-09-03 19:38:23,345 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 44 [2019-09-03 19:38:23,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:38:23,345 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-09-03 19:38:23,345 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-03 19:38:23,345 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-09-03 19:38:23,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-03 19:38:23,346 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:38:23,346 INFO L399 BasicCegarLoop]: trace histogram [18, 14, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:38:23,346 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:38:23,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:38:23,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1661276614, now seen corresponding path program 11 times [2019-09-03 19:38:23,347 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:38:23,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:38:23,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:38:23,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:38:23,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:38:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:38:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 105 proven. 210 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-03 19:38:23,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:38:23,610 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:38:23,621 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:40:40,983 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-09-03 19:40:40,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:40:41,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-03 19:40:41,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:40:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 80 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 19:40:41,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:40:41,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 19 [2019-09-03 19:40:41,728 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 19:40:41,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 19:40:41,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2019-09-03 19:40:41,729 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 19 states. [2019-09-03 19:40:42,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:40:42,107 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-09-03 19:40:42,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 19:40:42,108 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2019-09-03 19:40:42,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:40:42,108 INFO L225 Difference]: With dead ends: 63 [2019-09-03 19:40:42,108 INFO L226 Difference]: Without dead ends: 49 [2019-09-03 19:40:42,109 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2019-09-03 19:40:42,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-03 19:40:42,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-09-03 19:40:42,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-03 19:40:42,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-09-03 19:40:42,114 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 46 [2019-09-03 19:40:42,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:40:42,115 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-09-03 19:40:42,115 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 19:40:42,115 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-09-03 19:40:42,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-03 19:40:42,118 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:40:42,119 INFO L399 BasicCegarLoop]: trace histogram [19, 15, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:40:42,119 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:40:42,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:40:42,119 INFO L82 PathProgramCache]: Analyzing trace with hash -910251657, now seen corresponding path program 12 times [2019-09-03 19:40:42,119 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:40:42,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:40:42,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:40:42,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:40:42,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:40:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:40:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-03 19:40:42,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:40:42,373 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:40:42,390 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 19:43:38,669 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-03 19:43:38,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:43:39,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-03 19:43:39,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:43:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 175 proven. 144 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-09-03 19:43:39,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:43:39,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2019-09-03 19:43:39,379 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-03 19:43:39,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-03 19:43:39,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2019-09-03 19:43:39,381 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 31 states. [2019-09-03 19:43:55,748 WARN L188 SmtUtils]: Spent 9.03 s on a formula simplification. DAG size of input: 52 DAG size of output: 12 [2019-09-03 19:44:08,992 WARN L188 SmtUtils]: Spent 7.33 s on a formula simplification. DAG size of input: 48 DAG size of output: 12 [2019-09-03 19:44:23,691 WARN L188 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 52 DAG size of output: 12 [2019-09-03 19:44:28,915 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ c_main_~x~0 4294967285) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967290) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967281) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967279) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967291) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967289) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967287) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967283) 4294967296) 65521)) is different from false [2019-09-03 19:44:44,055 WARN L188 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 12 [2019-09-03 19:44:54,964 WARN L188 SmtUtils]: Spent 827.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 12 [2019-09-03 19:45:15,757 WARN L188 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 12 [2019-09-03 19:45:37,654 WARN L188 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2019-09-03 19:46:05,071 WARN L188 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2019-09-03 19:46:08,956 WARN L188 SmtUtils]: Spent 3.70 s on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2019-09-03 19:46:21,751 WARN L188 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 28 DAG size of output: 12 [2019-09-03 19:46:23,857 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ c_main_~x~0 4294967290) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967291) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967293) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967295) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967292) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967289) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967294) 4294967296) 65521)) is different from false [2019-09-03 19:46:31,050 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2019-09-03 19:46:33,201 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ c_main_~x~0 4294967290) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967288) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967291) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967293) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967295) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967292) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967289) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967287) 4294967296) 65521) (< (mod (+ c_main_~x~0 4294967294) 4294967296) 65521)) is different from false [2019-09-03 19:46:48,841 WARN L188 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 12 [2019-09-03 19:47:03,777 WARN L188 SmtUtils]: Spent 3.73 s on a formula simplification. DAG size of input: 44 DAG size of output: 12 [2019-09-03 19:47:03,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:47:03,779 INFO L93 Difference]: Finished difference Result 110 states and 145 transitions. [2019-09-03 19:47:03,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-03 19:47:03,779 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 48 [2019-09-03 19:47:03,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:47:03,781 INFO L225 Difference]: With dead ends: 110 [2019-09-03 19:47:03,781 INFO L226 Difference]: Without dead ends: 96 [2019-09-03 19:47:03,783 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 171.1s TimeCoverageRelationStatistics Valid=504, Invalid=1931, Unknown=27, NotChecked=294, Total=2756 [2019-09-03 19:47:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-09-03 19:47:03,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2019-09-03 19:47:03,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-03 19:47:03,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 106 transitions. [2019-09-03 19:47:03,792 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 106 transitions. Word has length 48 [2019-09-03 19:47:03,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:47:03,795 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 106 transitions. [2019-09-03 19:47:03,795 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-03 19:47:03,796 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 106 transitions. [2019-09-03 19:47:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-03 19:47:03,796 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:47:03,796 INFO L399 BasicCegarLoop]: trace histogram [25, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:47:03,797 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:47:03,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:47:03,797 INFO L82 PathProgramCache]: Analyzing trace with hash -843336229, now seen corresponding path program 13 times [2019-09-03 19:47:03,797 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:47:03,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:47:03,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:47:03,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:47:03,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:47:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:47:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 289 proven. 272 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-09-03 19:47:04,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:47:04,132 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:47:04,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:47:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:47:04,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-03 19:47:04,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:47:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 289 proven. 272 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-09-03 19:47:04,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:47:04,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-03 19:47:04,258 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 19:47:04,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 19:47:04,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-09-03 19:47:04,259 INFO L87 Difference]: Start difference. First operand 85 states and 106 transitions. Second operand 20 states. [2019-09-03 19:47:04,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:47:04,657 INFO L93 Difference]: Finished difference Result 135 states and 178 transitions. [2019-09-03 19:47:04,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-03 19:47:04,657 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2019-09-03 19:47:04,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:47:04,658 INFO L225 Difference]: With dead ends: 135 [2019-09-03 19:47:04,658 INFO L226 Difference]: Without dead ends: 87 [2019-09-03 19:47:04,659 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-09-03 19:47:04,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-09-03 19:47:04,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-09-03 19:47:04,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-03 19:47:04,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2019-09-03 19:47:04,668 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 60 [2019-09-03 19:47:04,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:47:04,668 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2019-09-03 19:47:04,668 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-03 19:47:04,668 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2019-09-03 19:47:04,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-09-03 19:47:04,669 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:47:04,669 INFO L399 BasicCegarLoop]: trace histogram [26, 17, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:47:04,669 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:47:04,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:47:04,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1725660584, now seen corresponding path program 14 times [2019-09-03 19:47:04,670 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:47:04,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:47:04,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:47:04,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:47:04,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:47:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:47:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-09-03 19:47:05,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:47:05,025 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:47:05,048 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:47:05,073 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:47:05,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:47:05,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 55 conjunts are in the unsatisfiable core [2019-09-03 19:47:05,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:47:05,382 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:47:05,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:47:05,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29] total 30 [2019-09-03 19:47:05,386 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-03 19:47:05,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-03 19:47:05,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2019-09-03 19:47:05,387 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 30 states. [2019-09-03 19:47:06,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:47:06,136 INFO L93 Difference]: Finished difference Result 137 states and 180 transitions. [2019-09-03 19:47:06,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 19:47:06,137 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 62 [2019-09-03 19:47:06,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:47:06,138 INFO L225 Difference]: With dead ends: 137 [2019-09-03 19:47:06,138 INFO L226 Difference]: Without dead ends: 89 [2019-09-03 19:47:06,139 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2019-09-03 19:47:06,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-09-03 19:47:06,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-09-03 19:47:06,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-03 19:47:06,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 110 transitions. [2019-09-03 19:47:06,148 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 110 transitions. Word has length 62 [2019-09-03 19:47:06,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:47:06,148 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 110 transitions. [2019-09-03 19:47:06,148 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-03 19:47:06,148 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 110 transitions. [2019-09-03 19:47:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-03 19:47:06,149 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:47:06,149 INFO L399 BasicCegarLoop]: trace histogram [27, 18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:47:06,150 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:47:06,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:47:06,150 INFO L82 PathProgramCache]: Analyzing trace with hash 764158869, now seen corresponding path program 15 times [2019-09-03 19:47:06,150 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:47:06,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:47:06,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:47:06,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:47:06,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:47:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:47:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 323 proven. 342 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-09-03 19:47:06,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:47:06,674 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:47:06,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:50:15,441 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2019-09-03 19:50:15,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:50:18,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-03 19:50:18,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:50:18,630 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 342 proven. 81 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2019-09-03 19:50:18,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:50:18,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 31 [2019-09-03 19:50:18,637 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-03 19:50:18,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-03 19:50:18,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2019-09-03 19:50:18,638 INFO L87 Difference]: Start difference. First operand 89 states and 110 transitions. Second operand 31 states. [2019-09-03 19:50:25,928 WARN L188 SmtUtils]: Spent 6.09 s on a formula simplification. DAG size of input: 40 DAG size of output: 16 [2019-09-03 19:50:39,381 WARN L188 SmtUtils]: Spent 4.64 s on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2019-09-03 19:50:50,977 WARN L188 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 40 DAG size of output: 12 [2019-09-03 19:51:00,959 WARN L188 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 24 DAG size of output: 12 [2019-09-03 19:51:08,372 WARN L188 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2019-09-03 19:51:35,492 WARN L188 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 32 DAG size of output: 12 [2019-09-03 19:51:49,807 WARN L188 SmtUtils]: Spent 5.35 s on a formula simplification. DAG size of input: 32 DAG size of output: 12 [2019-09-03 19:52:00,517 WARN L188 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 12