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/array-examples/standard_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 09:29:01,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 09:29:01,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 09:29:01,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 09:29:01,741 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 09:29:01,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 09:29:01,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 09:29:01,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 09:29:01,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 09:29:01,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 09:29:01,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 09:29:01,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 09:29:01,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 09:29:01,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 09:29:01,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 09:29:01,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 09:29:01,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 09:29:01,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 09:29:01,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 09:29:01,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 09:29:01,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 09:29:01,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 09:29:01,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 09:29:01,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 09:29:01,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 09:29:01,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 09:29:01,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 09:29:01,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 09:29:01,810 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 [2019-09-07 09:29:01,824 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 09:29:01,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 09:29:01,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 09:29:01,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 09:29:01,826 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 09:29:01,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 09:29:01,826 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 09:29:01,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 09:29:01,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 09:29:01,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 09:29:01,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 09:29:01,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 09:29:01,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 09:29:01,828 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 09:29:01,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 09:29:01,828 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 09:29:01,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 09:29:01,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 09:29:01,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 09:29:01,829 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 09:29:01,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 09:29:01,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 09:29:01,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 09:29:01,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 09:29:01,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 09:29:01,830 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 09:29:01,830 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 09:29:01,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 09:29:01,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 09:29:01,870 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 09:29:01,881 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 09:29:01,885 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 09:29:01,886 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 09:29:01,887 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 09:29:01,888 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-09-07 09:29:01,949 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c42bfb9f/656a493cf9a84555b83ec00a64cac6e3/FLAG185364b4e [2019-09-07 09:29:02,423 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 09:29:02,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-09-07 09:29:02,429 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c42bfb9f/656a493cf9a84555b83ec00a64cac6e3/FLAG185364b4e [2019-09-07 09:29:02,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c42bfb9f/656a493cf9a84555b83ec00a64cac6e3 [2019-09-07 09:29:02,800 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 09:29:02,801 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 09:29:02,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 09:29:02,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 09:29:02,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 09:29:02,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:29:02" (1/1) ... [2019-09-07 09:29:02,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2817b760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:02, skipping insertion in model container [2019-09-07 09:29:02,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:29:02" (1/1) ... [2019-09-07 09:29:02,822 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 09:29:02,839 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 09:29:03,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:29:03,025 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 09:29:03,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:29:03,071 INFO L192 MainTranslator]: Completed translation [2019-09-07 09:29:03,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:03 WrapperNode [2019-09-07 09:29:03,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 09:29:03,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 09:29:03,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 09:29:03,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 09:29:03,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:03" (1/1) ... [2019-09-07 09:29:03,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:03" (1/1) ... [2019-09-07 09:29:03,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:03" (1/1) ... [2019-09-07 09:29:03,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:03" (1/1) ... [2019-09-07 09:29:03,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:03" (1/1) ... [2019-09-07 09:29:03,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:03" (1/1) ... [2019-09-07 09:29:03,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:03" (1/1) ... [2019-09-07 09:29:03,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 09:29:03,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 09:29:03,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 09:29:03,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 09:29:03,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:03" (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 [2019-09-07 09:29:03,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 09:29:03,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 09:29:03,270 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 09:29:03,270 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 09:29:03,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 09:29:03,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 09:29:03,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 09:29:03,270 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 09:29:03,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 09:29:03,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 09:29:03,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 09:29:03,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 09:29:03,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 09:29:03,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 09:29:03,540 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 09:29:03,541 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-07 09:29:03,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:29:03 BoogieIcfgContainer [2019-09-07 09:29:03,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 09:29:03,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 09:29:03,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 09:29:03,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 09:29:03,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 09:29:02" (1/3) ... [2019-09-07 09:29:03,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116231af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:29:03, skipping insertion in model container [2019-09-07 09:29:03,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:03" (2/3) ... [2019-09-07 09:29:03,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116231af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:29:03, skipping insertion in model container [2019-09-07 09:29:03,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:29:03" (3/3) ... [2019-09-07 09:29:03,552 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2019-09-07 09:29:03,578 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 09:29:03,590 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 09:29:03,610 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 09:29:03,657 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 09:29:03,658 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 09:29:03,658 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 09:29:03,659 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 09:29:03,659 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 09:29:03,659 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 09:29:03,659 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 09:29:03,659 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 09:29:03,659 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 09:29:03,680 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-09-07 09:29:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-07 09:29:03,687 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:03,689 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:03,691 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:03,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:03,697 INFO L82 PathProgramCache]: Analyzing trace with hash -526773211, now seen corresponding path program 1 times [2019-09-07 09:29:03,699 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:03,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:03,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:03,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:03,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:29:03,822 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:29:03,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 09:29:03,825 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 09:29:03,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 09:29:03,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:29:03,839 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-09-07 09:29:03,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:03,865 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2019-09-07 09:29:03,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 09:29:03,867 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-09-07 09:29:03,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:03,875 INFO L225 Difference]: With dead ends: 56 [2019-09-07 09:29:03,876 INFO L226 Difference]: Without dead ends: 27 [2019-09-07 09:29:03,879 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 [2019-09-07 09:29:03,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-07 09:29:03,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-07 09:29:03,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-07 09:29:03,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-09-07 09:29:03,919 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2019-09-07 09:29:03,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:03,920 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-09-07 09:29:03,920 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 09:29:03,920 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-09-07 09:29:03,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-07 09:29:03,921 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:03,921 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:03,922 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:03,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:03,922 INFO L82 PathProgramCache]: Analyzing trace with hash -777624222, now seen corresponding path program 1 times [2019-09-07 09:29:03,922 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:03,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:03,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:03,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:03,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:29:03,992 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:29:03,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:29:03,997 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:29:03,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:29:03,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:29:03,999 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-09-07 09:29:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:04,035 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-09-07 09:29:04,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:29:04,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-09-07 09:29:04,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:04,036 INFO L225 Difference]: With dead ends: 48 [2019-09-07 09:29:04,037 INFO L226 Difference]: Without dead ends: 29 [2019-09-07 09:29:04,038 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:29:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-07 09:29:04,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-09-07 09:29:04,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-07 09:29:04,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-09-07 09:29:04,045 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2019-09-07 09:29:04,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:04,046 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-09-07 09:29:04,046 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:29:04,046 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-09-07 09:29:04,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-07 09:29:04,047 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:04,047 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:04,047 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:04,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:04,048 INFO L82 PathProgramCache]: Analyzing trace with hash 2101592964, now seen corresponding path program 1 times [2019-09-07 09:29:04,048 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:04,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:04,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:04,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:04,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:29:04,125 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:29:04,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-07 09:29:04,126 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 09:29:04,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 09:29:04,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-07 09:29:04,127 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2019-09-07 09:29:04,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:04,181 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-09-07 09:29:04,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:29:04,181 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-09-07 09:29:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:04,183 INFO L225 Difference]: With dead ends: 46 [2019-09-07 09:29:04,183 INFO L226 Difference]: Without dead ends: 33 [2019-09-07 09:29:04,184 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:29:04,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-07 09:29:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2019-09-07 09:29:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-07 09:29:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-09-07 09:29:04,190 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2019-09-07 09:29:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:04,191 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-09-07 09:29:04,191 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 09:29:04,191 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-09-07 09:29:04,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-07 09:29:04,192 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:04,192 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:04,193 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:04,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:04,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1818591568, now seen corresponding path program 1 times [2019-09-07 09:29:04,193 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:04,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:04,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:04,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:04,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:29:04,290 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:29:04,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-07 09:29:04,291 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:29:04,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:29:04,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:29:04,292 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2019-09-07 09:29:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:04,442 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2019-09-07 09:29:04,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 09:29:04,443 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-09-07 09:29:04,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:04,445 INFO L225 Difference]: With dead ends: 62 [2019-09-07 09:29:04,445 INFO L226 Difference]: Without dead ends: 42 [2019-09-07 09:29:04,446 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:29:04,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-07 09:29:04,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-09-07 09:29:04,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-07 09:29:04,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-09-07 09:29:04,453 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2019-09-07 09:29:04,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:04,453 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-09-07 09:29:04,454 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:29:04,454 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-09-07 09:29:04,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-07 09:29:04,455 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:04,455 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:04,455 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:04,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:04,456 INFO L82 PathProgramCache]: Analyzing trace with hash 334453631, now seen corresponding path program 1 times [2019-09-07 09:29:04,456 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:04,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:04,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:04,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:04,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-07 09:29:04,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:04,602 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 [2019-09-07 09:29:04,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:04,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:29:04,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-07 09:29:04,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:04,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-09-07 09:29:04,741 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 09:29:04,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 09:29:04,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:29:04,744 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 10 states. [2019-09-07 09:29:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:05,084 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2019-09-07 09:29:05,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 09:29:05,085 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2019-09-07 09:29:05,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:05,088 INFO L225 Difference]: With dead ends: 86 [2019-09-07 09:29:05,088 INFO L226 Difference]: Without dead ends: 62 [2019-09-07 09:29:05,089 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:29:05,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-07 09:29:05,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2019-09-07 09:29:05,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-07 09:29:05,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2019-09-07 09:29:05,099 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 26 [2019-09-07 09:29:05,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:05,099 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2019-09-07 09:29:05,099 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 09:29:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2019-09-07 09:29:05,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-07 09:29:05,100 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:05,100 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:05,101 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:05,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:05,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1076752728, now seen corresponding path program 2 times [2019-09-07 09:29:05,101 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:05,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:05,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:05,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:05,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-07 09:29:05,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:05,256 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) [2019-09-07 09:29:05,284 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 [2019-09-07 09:29:05,317 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:29:05,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:05,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:29:05,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-07 09:29:05,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:05,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2019-09-07 09:29:05,362 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 09:29:05,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 09:29:05,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:29:05,363 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 10 states. [2019-09-07 09:29:05,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:05,598 INFO L93 Difference]: Finished difference Result 125 states and 170 transitions. [2019-09-07 09:29:05,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 09:29:05,599 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-09-07 09:29:05,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:05,601 INFO L225 Difference]: With dead ends: 125 [2019-09-07 09:29:05,601 INFO L226 Difference]: Without dead ends: 96 [2019-09-07 09:29:05,602 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:29:05,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-09-07 09:29:05,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 46. [2019-09-07 09:29:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-07 09:29:05,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2019-09-07 09:29:05,615 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 34 [2019-09-07 09:29:05,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:05,615 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2019-09-07 09:29:05,616 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 09:29:05,616 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2019-09-07 09:29:05,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-07 09:29:05,617 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:05,617 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:05,617 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:05,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:05,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1004151887, now seen corresponding path program 3 times [2019-09-07 09:29:05,618 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:05,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:05,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:05,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:05,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 09:29:05,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:05,770 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:05,789 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:29:05,827 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-07 09:29:05,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:05,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 09:29:05,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-09-07 09:29:05,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:05,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2019-09-07 09:29:05,905 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 09:29:05,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 09:29:05,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:29:05,906 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 14 states. [2019-09-07 09:29:06,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:06,506 INFO L93 Difference]: Finished difference Result 163 states and 224 transitions. [2019-09-07 09:29:06,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 09:29:06,507 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2019-09-07 09:29:06,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:06,509 INFO L225 Difference]: With dead ends: 163 [2019-09-07 09:29:06,509 INFO L226 Difference]: Without dead ends: 132 [2019-09-07 09:29:06,510 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 09:29:06,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-09-07 09:29:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 81. [2019-09-07 09:29:06,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-07 09:29:06,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 109 transitions. [2019-09-07 09:29:06,525 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 109 transitions. Word has length 39 [2019-09-07 09:29:06,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:06,525 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 109 transitions. [2019-09-07 09:29:06,525 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 09:29:06,526 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 109 transitions. [2019-09-07 09:29:06,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-07 09:29:06,527 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:06,527 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:06,527 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:06,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:06,528 INFO L82 PathProgramCache]: Analyzing trace with hash -105283366, now seen corresponding path program 1 times [2019-09-07 09:29:06,528 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:06,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:06,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:06,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:06,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-09-07 09:29:06,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:06,671 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:06,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:06,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 09:29:06,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-09-07 09:29:06,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:06,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2019-09-07 09:29:06,816 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 09:29:06,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 09:29:06,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-09-07 09:29:06,817 INFO L87 Difference]: Start difference. First operand 81 states and 109 transitions. Second operand 13 states. [2019-09-07 09:29:07,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:07,446 INFO L93 Difference]: Finished difference Result 273 states and 396 transitions. [2019-09-07 09:29:07,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 09:29:07,447 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2019-09-07 09:29:07,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:07,450 INFO L225 Difference]: With dead ends: 273 [2019-09-07 09:29:07,451 INFO L226 Difference]: Without dead ends: 209 [2019-09-07 09:29:07,452 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=390, Invalid=800, Unknown=0, NotChecked=0, Total=1190 [2019-09-07 09:29:07,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-09-07 09:29:07,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 68. [2019-09-07 09:29:07,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-07 09:29:07,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 89 transitions. [2019-09-07 09:29:07,474 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 89 transitions. Word has length 47 [2019-09-07 09:29:07,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:07,475 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 89 transitions. [2019-09-07 09:29:07,477 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 09:29:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 89 transitions. [2019-09-07 09:29:07,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-07 09:29:07,479 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:07,479 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:07,479 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:07,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:07,480 INFO L82 PathProgramCache]: Analyzing trace with hash -460347219, now seen corresponding path program 4 times [2019-09-07 09:29:07,480 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:07,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:07,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:07,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:07,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 7 proven. 94 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-09-07 09:29:07,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:07,667 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) [2019-09-07 09:29:07,685 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:07,723 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:29:07,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:07,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:29:07,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-09-07 09:29:07,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:07,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2019-09-07 09:29:07,785 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 09:29:07,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 09:29:07,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:29:07,785 INFO L87 Difference]: Start difference. First operand 68 states and 89 transitions. Second operand 16 states. [2019-09-07 09:29:08,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:08,578 INFO L93 Difference]: Finished difference Result 330 states and 478 transitions. [2019-09-07 09:29:08,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 09:29:08,579 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2019-09-07 09:29:08,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:08,581 INFO L225 Difference]: With dead ends: 330 [2019-09-07 09:29:08,581 INFO L226 Difference]: Without dead ends: 281 [2019-09-07 09:29:08,585 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 09:29:08,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-09-07 09:29:08,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 146. [2019-09-07 09:29:08,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-09-07 09:29:08,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 206 transitions. [2019-09-07 09:29:08,610 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 206 transitions. Word has length 61 [2019-09-07 09:29:08,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:08,610 INFO L475 AbstractCegarLoop]: Abstraction has 146 states and 206 transitions. [2019-09-07 09:29:08,611 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 09:29:08,611 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 206 transitions. [2019-09-07 09:29:08,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-07 09:29:08,613 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:08,613 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:08,613 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:08,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:08,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1117731222, now seen corresponding path program 2 times [2019-09-07 09:29:08,614 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:08,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:08,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:08,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:08,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 9 proven. 140 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2019-09-07 09:29:08,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:08,751 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:08,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:29:08,816 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:29:08,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:08,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 09:29:08,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2019-09-07 09:29:08,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:08,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2019-09-07 09:29:08,901 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:29:08,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:29:08,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:29:08,904 INFO L87 Difference]: Start difference. First operand 146 states and 206 transitions. Second operand 15 states. [2019-09-07 09:29:09,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:09,666 INFO L93 Difference]: Finished difference Result 473 states and 698 transitions. [2019-09-07 09:29:09,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-07 09:29:09,667 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2019-09-07 09:29:09,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:09,670 INFO L225 Difference]: With dead ends: 473 [2019-09-07 09:29:09,670 INFO L226 Difference]: Without dead ends: 348 [2019-09-07 09:29:09,672 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=600, Invalid=1206, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 09:29:09,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2019-09-07 09:29:09,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 90. [2019-09-07 09:29:09,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-07 09:29:09,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 121 transitions. [2019-09-07 09:29:09,685 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 121 transitions. Word has length 69 [2019-09-07 09:29:09,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:09,685 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 121 transitions. [2019-09-07 09:29:09,685 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:29:09,685 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 121 transitions. [2019-09-07 09:29:09,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-07 09:29:09,687 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:09,687 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:09,687 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:09,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:09,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1654179415, now seen corresponding path program 5 times [2019-09-07 09:29:09,688 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:09,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:09,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:09,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:09,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 9 proven. 251 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-09-07 09:29:09,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:09,845 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:09,856 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:29:09,898 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-09-07 09:29:09,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:09,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 09:29:09,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:09,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 09:29:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 204 proven. 34 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (8)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:29:10,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:10,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2019-09-07 09:29:10,023 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 09:29:10,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 09:29:10,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:29:10,024 INFO L87 Difference]: Start difference. First operand 90 states and 121 transitions. Second operand 22 states. [2019-09-07 09:29:13,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:13,615 INFO L93 Difference]: Finished difference Result 598 states and 893 transitions. [2019-09-07 09:29:13,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2019-09-07 09:29:13,616 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 83 [2019-09-07 09:29:13,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:13,619 INFO L225 Difference]: With dead ends: 598 [2019-09-07 09:29:13,620 INFO L226 Difference]: Without dead ends: 517 [2019-09-07 09:29:13,629 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6046 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2389, Invalid=13613, Unknown=0, NotChecked=0, Total=16002 [2019-09-07 09:29:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2019-09-07 09:29:13,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 122. [2019-09-07 09:29:13,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-09-07 09:29:13,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 157 transitions. [2019-09-07 09:29:13,659 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 157 transitions. Word has length 83 [2019-09-07 09:29:13,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:13,661 INFO L475 AbstractCegarLoop]: Abstraction has 122 states and 157 transitions. [2019-09-07 09:29:13,661 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 09:29:13,661 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 157 transitions. [2019-09-07 09:29:13,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-07 09:29:13,664 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:13,664 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 14, 8, 8, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:13,664 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:13,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:13,665 INFO L82 PathProgramCache]: Analyzing trace with hash -453039857, now seen corresponding path program 3 times [2019-09-07 09:29:13,665 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:13,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:13,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:13,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:13,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 12 proven. 399 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-09-07 09:29:13,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:13,857 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 [2019-09-07 09:29:13,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:29:13,896 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-07 09:29:13,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:13,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 09:29:13,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:14,085 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-07 09:29:14,087 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2019-09-07 09:29:14,088 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-07 09:29:14,089 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-07 09:29:14,089 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-07 09:29:14,090 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:4 [2019-09-07 09:29:14,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 09:29:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2019-09-07 09:29:14,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:14,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2019-09-07 09:29:14,182 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 09:29:14,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 09:29:14,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:29:14,184 INFO L87 Difference]: Start difference. First operand 122 states and 157 transitions. Second operand 23 states. [2019-09-07 09:29:16,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:16,384 INFO L93 Difference]: Finished difference Result 477 states and 636 transitions. [2019-09-07 09:29:16,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-07 09:29:16,385 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 95 [2019-09-07 09:29:16,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:16,393 INFO L225 Difference]: With dead ends: 477 [2019-09-07 09:29:16,393 INFO L226 Difference]: Without dead ends: 379 [2019-09-07 09:29:16,399 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2113 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1406, Invalid=4914, Unknown=0, NotChecked=0, Total=6320 [2019-09-07 09:29:16,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2019-09-07 09:29:16,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 218. [2019-09-07 09:29:16,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-09-07 09:29:16,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 283 transitions. [2019-09-07 09:29:16,440 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 283 transitions. Word has length 95 [2019-09-07 09:29:16,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:16,440 INFO L475 AbstractCegarLoop]: Abstraction has 218 states and 283 transitions. [2019-09-07 09:29:16,440 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 09:29:16,440 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 283 transitions. [2019-09-07 09:29:16,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-07 09:29:16,443 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:16,443 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:16,444 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:16,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:16,444 INFO L82 PathProgramCache]: Analyzing trace with hash 215199622, now seen corresponding path program 6 times [2019-09-07 09:29:16,444 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:16,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:16,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:16,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:16,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 12 proven. 583 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-09-07 09:29:16,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:16,671 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) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:16,690 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:29:16,756 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-09-07 09:29:16,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:16,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:29:16,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:16,810 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 09:29:16,824 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 09:29:16,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 09:29:16,839 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-07 09:29:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 187 proven. 12 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2019-09-07 09:29:16,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:16,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 21 [2019-09-07 09:29:16,870 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 09:29:16,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 09:29:16,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:29:16,873 INFO L87 Difference]: Start difference. First operand 218 states and 283 transitions. Second operand 21 states. [2019-09-07 09:29:18,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:18,379 INFO L93 Difference]: Finished difference Result 866 states and 1175 transitions. [2019-09-07 09:29:18,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-09-07 09:29:18,382 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 107 [2019-09-07 09:29:18,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:18,390 INFO L225 Difference]: With dead ends: 866 [2019-09-07 09:29:18,390 INFO L226 Difference]: Without dead ends: 843 [2019-09-07 09:29:18,392 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1371, Invalid=3741, Unknown=0, NotChecked=0, Total=5112 [2019-09-07 09:29:18,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2019-09-07 09:29:18,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 257. [2019-09-07 09:29:18,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2019-09-07 09:29:18,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 347 transitions. [2019-09-07 09:29:18,438 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 347 transitions. Word has length 107 [2019-09-07 09:29:18,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:18,439 INFO L475 AbstractCegarLoop]: Abstraction has 257 states and 347 transitions. [2019-09-07 09:29:18,439 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 09:29:18,439 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 347 transitions. [2019-09-07 09:29:18,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-07 09:29:18,441 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:18,441 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:18,441 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:18,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:18,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1543017017, now seen corresponding path program 7 times [2019-09-07 09:29:18,442 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:18,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:18,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:18,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:18,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 14 proven. 1016 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2019-09-07 09:29:18,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:18,716 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) [2019-09-07 09:29:18,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:18,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 09:29:18,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1145 trivial. 0 not checked. [2019-09-07 09:29:18,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:18,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 19 [2019-09-07 09:29:18,877 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 09:29:18,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 09:29:18,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:29:18,878 INFO L87 Difference]: Start difference. First operand 257 states and 347 transitions. Second operand 19 states. [2019-09-07 09:29:20,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:20,809 INFO L93 Difference]: Finished difference Result 1710 states and 2336 transitions. [2019-09-07 09:29:20,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-07 09:29:20,810 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 128 [2019-09-07 09:29:20,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:20,819 INFO L225 Difference]: With dead ends: 1710 [2019-09-07 09:29:20,820 INFO L226 Difference]: Without dead ends: 1476 [2019-09-07 09:29:20,824 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1475, Invalid=3781, Unknown=0, NotChecked=0, Total=5256 [2019-09-07 09:29:20,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2019-09-07 09:29:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 308. [2019-09-07 09:29:20,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2019-09-07 09:29:20,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 413 transitions. [2019-09-07 09:29:20,925 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 413 transitions. Word has length 128 [2019-09-07 09:29:20,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:20,925 INFO L475 AbstractCegarLoop]: Abstraction has 308 states and 413 transitions. [2019-09-07 09:29:20,926 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 09:29:20,926 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 413 transitions. [2019-09-07 09:29:20,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-09-07 09:29:20,929 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:20,930 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 29, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:20,930 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:20,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:20,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1259968835, now seen corresponding path program 8 times [2019-09-07 09:29:20,931 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:20,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:20,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:20,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:20,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1696 backedges. 16 proven. 1448 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2019-09-07 09:29:21,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:21,197 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 [2019-09-07 09:29:21,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:29:21,291 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:29:21,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:21,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 09:29:21,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1696 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2019-09-07 09:29:21,360 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.core.lib.util.MonitoredProcess.forceShutdown(MonitoredProcess.java:403) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.exit(Executor.java:135) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.exit(Scriptor.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:232) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:453) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-09-07 09:29:21,365 INFO L168 Benchmark]: Toolchain (without parser) took 18563.65 ms. Allocated memory was 132.1 MB in the beginning and 446.2 MB in the end (delta: 314.0 MB). Free memory was 88.6 MB in the beginning and 136.6 MB in the end (delta: -48.0 MB). Peak memory consumption was 266.1 MB. Max. memory is 7.1 GB. [2019-09-07 09:29:21,365 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 132.1 MB. Free memory is still 106.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-09-07 09:29:21,366 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.14 ms. Allocated memory is still 132.1 MB. Free memory was 88.2 MB in the beginning and 78.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-09-07 09:29:21,367 INFO L168 Benchmark]: Boogie Preprocessor took 139.23 ms. Allocated memory was 132.1 MB in the beginning and 200.3 MB in the end (delta: 68.2 MB). Free memory was 78.4 MB in the beginning and 176.1 MB in the end (delta: -97.7 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2019-09-07 09:29:21,368 INFO L168 Benchmark]: RCFGBuilder took 330.31 ms. Allocated memory is still 200.3 MB. Free memory was 176.1 MB in the beginning and 160.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2019-09-07 09:29:21,369 INFO L168 Benchmark]: TraceAbstraction took 17819.89 ms. Allocated memory was 200.3 MB in the beginning and 446.2 MB in the end (delta: 245.9 MB). Free memory was 159.4 MB in the beginning and 136.6 MB in the end (delta: 22.8 MB). Peak memory consumption was 268.7 MB. Max. memory is 7.1 GB. [2019-09-07 09:29:21,373 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 132.1 MB. Free memory is still 106.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 268.14 ms. Allocated memory is still 132.1 MB. Free memory was 88.2 MB in the beginning and 78.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 139.23 ms. Allocated memory was 132.1 MB in the beginning and 200.3 MB in the end (delta: 68.2 MB). Free memory was 78.4 MB in the beginning and 176.1 MB in the end (delta: -97.7 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 330.31 ms. Allocated memory is still 200.3 MB. Free memory was 176.1 MB in the beginning and 160.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17819.89 ms. Allocated memory was 200.3 MB in the beginning and 446.2 MB in the end (delta: 245.9 MB). Free memory was 159.4 MB in the beginning and 136.6 MB in the end (delta: 22.8 MB). Peak memory consumption was 268.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.core.lib.util.MonitoredProcess.forceShutdown(MonitoredProcess.java:403) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...