java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:15:27,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:15:27,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:15:27,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:15:27,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:15:27,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:15:27,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:15:27,758 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:15:27,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:15:27,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:15:27,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:15:27,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:15:27,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:15:27,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:15:27,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:15:27,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:15:27,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:15:27,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:15:27,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:15:27,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:15:27,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:15:27,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:15:27,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:15:27,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:15:27,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:15:27,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:15:27,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:15:27,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:15:27,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:15:27,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:15:27,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:15:27,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:15:27,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:15:27,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:15:27,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:15:27,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:15:27,808 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 [2019-10-13 19:15:27,840 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:15:27,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:15:27,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:15:27,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:15:27,845 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:15:27,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:15:27,845 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:15:27,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:15:27,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:15:27,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:15:27,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:15:27,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:15:27,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:15:27,848 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:15:27,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:15:27,849 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:15:27,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:15:27,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:15:27,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:15:27,849 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:15:27,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:15:27,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:15:27,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:15:27,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:15:27,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:15:27,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:15:27,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:15:27,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:15:27,851 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:15:28,143 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:15:28,166 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:15:28,170 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:15:28,171 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:15:28,172 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:15:28,172 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i [2019-10-13 19:15:28,250 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9bf094ce/6a28b837347e4d08adbdcf4031d7ceaa/FLAG77f6b971b [2019-10-13 19:15:28,661 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:15:28,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i [2019-10-13 19:15:28,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9bf094ce/6a28b837347e4d08adbdcf4031d7ceaa/FLAG77f6b971b [2019-10-13 19:15:29,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9bf094ce/6a28b837347e4d08adbdcf4031d7ceaa [2019-10-13 19:15:29,086 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:15:29,090 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:15:29,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:15:29,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:15:29,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:15:29,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:29" (1/1) ... [2019-10-13 19:15:29,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cf90c45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:29, skipping insertion in model container [2019-10-13 19:15:29,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:29" (1/1) ... [2019-10-13 19:15:29,109 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:15:29,130 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:15:29,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:15:29,339 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:15:29,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:15:29,464 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:15:29,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:29 WrapperNode [2019-10-13 19:15:29,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:15:29,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:15:29,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:15:29,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:15:29,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:29" (1/1) ... [2019-10-13 19:15:29,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:29" (1/1) ... [2019-10-13 19:15:29,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:29" (1/1) ... [2019-10-13 19:15:29,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:29" (1/1) ... [2019-10-13 19:15:29,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:29" (1/1) ... [2019-10-13 19:15:29,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:29" (1/1) ... [2019-10-13 19:15:29,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:29" (1/1) ... [2019-10-13 19:15:29,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:15:29,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:15:29,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:15:29,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:15:29,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:29" (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 [2019-10-13 19:15:29,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:15:29,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:15:29,570 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:15:29,570 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:15:29,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:15:29,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:15:29,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:15:29,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-13 19:15:29,570 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:15:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 19:15:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:15:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:15:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:15:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:15:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:15:29,825 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:15:29,826 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-13 19:15:29,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:29 BoogieIcfgContainer [2019-10-13 19:15:29,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:15:29,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:15:29,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:15:29,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:15:29,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:15:29" (1/3) ... [2019-10-13 19:15:29,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7462c879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:29, skipping insertion in model container [2019-10-13 19:15:29,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:29" (2/3) ... [2019-10-13 19:15:29,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7462c879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:29, skipping insertion in model container [2019-10-13 19:15:29,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:29" (3/3) ... [2019-10-13 19:15:29,854 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i [2019-10-13 19:15:29,864 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:15:29,870 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:15:29,879 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:15:29,900 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:15:29,900 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:15:29,900 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:15:29,900 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:15:29,900 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:15:29,900 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:15:29,901 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:15:29,901 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:15:29,917 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-13 19:15:29,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 19:15:29,923 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:29,924 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:29,925 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:29,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:29,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1079158542, now seen corresponding path program 1 times [2019-10-13 19:15:29,938 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:29,938 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263764677] [2019-10-13 19:15:29,939 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:29,939 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:29,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:30,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263764677] [2019-10-13 19:15:30,249 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:15:30,250 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:15:30,250 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572724210] [2019-10-13 19:15:30,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:15:30,256 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:30,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:15:30,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:15:30,274 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2019-10-13 19:15:30,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:30,539 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2019-10-13 19:15:30,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:15:30,541 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-10-13 19:15:30,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:30,553 INFO L225 Difference]: With dead ends: 56 [2019-10-13 19:15:30,553 INFO L226 Difference]: Without dead ends: 30 [2019-10-13 19:15:30,559 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:15:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-13 19:15:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2019-10-13 19:15:30,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-13 19:15:30,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-13 19:15:30,602 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 11 [2019-10-13 19:15:30,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:30,603 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-13 19:15:30,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:15:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-13 19:15:30,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-13 19:15:30,607 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:30,607 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:30,608 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:30,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:30,609 INFO L82 PathProgramCache]: Analyzing trace with hash -476045897, now seen corresponding path program 1 times [2019-10-13 19:15:30,610 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:30,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952315255] [2019-10-13 19:15:30,611 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:30,611 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:30,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:30,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952315255] [2019-10-13 19:15:30,721 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:15:30,722 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:15:30,722 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822473153] [2019-10-13 19:15:30,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:15:30,726 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:30,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:15:30,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:15:30,727 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2019-10-13 19:15:30,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:30,799 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2019-10-13 19:15:30,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:15:30,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-13 19:15:30,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:30,801 INFO L225 Difference]: With dead ends: 36 [2019-10-13 19:15:30,801 INFO L226 Difference]: Without dead ends: 26 [2019-10-13 19:15:30,802 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:15:30,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-13 19:15:30,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-10-13 19:15:30,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-13 19:15:30,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-10-13 19:15:30,817 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2019-10-13 19:15:30,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:30,817 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-10-13 19:15:30,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:15:30,818 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-10-13 19:15:30,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 19:15:30,820 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:30,820 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:30,821 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:30,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:30,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1393486425, now seen corresponding path program 1 times [2019-10-13 19:15:30,823 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:30,823 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100655909] [2019-10-13 19:15:30,823 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:30,823 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:30,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:31,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100655909] [2019-10-13 19:15:31,219 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302289736] [2019-10-13 19:15:31,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:31,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 19:15:31,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:33,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:33,790 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:33,790 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2019-10-13 19:15:33,790 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649699404] [2019-10-13 19:15:33,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 19:15:33,791 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:33,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 19:15:33,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=122, Unknown=1, NotChecked=0, Total=156 [2019-10-13 19:15:33,792 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 13 states. [2019-10-13 19:15:36,604 WARN L191 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2019-10-13 19:15:38,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:38,913 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-10-13 19:15:38,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:15:38,914 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-10-13 19:15:38,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:38,915 INFO L225 Difference]: With dead ends: 40 [2019-10-13 19:15:38,915 INFO L226 Difference]: Without dead ends: 27 [2019-10-13 19:15:38,916 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2019-10-13 19:15:38,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-13 19:15:38,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2019-10-13 19:15:38,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-13 19:15:38,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-10-13 19:15:38,921 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2019-10-13 19:15:38,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:38,921 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-10-13 19:15:38,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 19:15:38,922 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-10-13 19:15:38,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 19:15:38,923 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:38,923 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:39,123 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:39,124 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:39,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:39,125 INFO L82 PathProgramCache]: Analyzing trace with hash 618852702, now seen corresponding path program 1 times [2019-10-13 19:15:39,126 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:39,126 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133753085] [2019-10-13 19:15:39,127 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:39,127 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:39,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:39,617 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 36 [2019-10-13 19:15:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:39,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133753085] [2019-10-13 19:15:39,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546610754] [2019-10-13 19:15:39,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:39,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-13 19:15:39,888 INFO L279 TraceCheckSpWp]: Computing forward predicates...