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_strcmp_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:47:32,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:47:32,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:47:32,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:47:32,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:47:32,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:47:32,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:47:32,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:47:32,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:47:32,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:47:32,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:47:32,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:47:32,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:47:32,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:47:32,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:47:32,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:47:32,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:47:32,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:47:32,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:47:32,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:47:32,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:47:32,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:47:32,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:47:32,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:47:32,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:47:32,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:47:32,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:47:32,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:47:32,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:47:32,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:47:32,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:47:32,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:47:32,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:47:32,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:47:32,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:47:32,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:47:32,363 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 17:47:32,385 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:47:32,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:47:32,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:47:32,387 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:47:32,387 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:47:32,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:47:32,388 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:47:32,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:47:32,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:47:32,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:47:32,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:47:32,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:47:32,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:47:32,391 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:47:32,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:47:32,391 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:47:32,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:47:32,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:47:32,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:47:32,392 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:47:32,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:47:32,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:47:32,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:47:32,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:47:32,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:47:32,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:47:32,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:47:32,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:47:32,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:47:32,740 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:47:32,758 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:47:32,762 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:47:32,763 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:47:32,764 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:47:32,764 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcmp_ground.i [2019-10-13 17:47:32,831 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a774c657/33b637c8b5d4453e8d657330268fa820/FLAG41af0d447 [2019-10-13 17:47:33,281 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:47:33,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_strcmp_ground.i [2019-10-13 17:47:33,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a774c657/33b637c8b5d4453e8d657330268fa820/FLAG41af0d447 [2019-10-13 17:47:33,672 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a774c657/33b637c8b5d4453e8d657330268fa820 [2019-10-13 17:47:33,683 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:47:33,684 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:47:33,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:47:33,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:47:33,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:47:33,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:47:33" (1/1) ... [2019-10-13 17:47:33,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78d3b3cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:33, skipping insertion in model container [2019-10-13 17:47:33,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:47:33" (1/1) ... [2019-10-13 17:47:33,700 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:47:33,718 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:47:33,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:47:33,921 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:47:33,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:47:33,955 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:47:33,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:33 WrapperNode [2019-10-13 17:47:33,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:47:33,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:47:33,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:47:33,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:47:34,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:33" (1/1) ... [2019-10-13 17:47:34,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:33" (1/1) ... [2019-10-13 17:47:34,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:33" (1/1) ... [2019-10-13 17:47:34,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:33" (1/1) ... [2019-10-13 17:47:34,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:33" (1/1) ... [2019-10-13 17:47:34,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:33" (1/1) ... [2019-10-13 17:47:34,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:33" (1/1) ... [2019-10-13 17:47:34,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:47:34,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:47:34,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:47:34,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:47:34,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:33" (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 17:47:34,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:47:34,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:47:34,132 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:47:34,132 INFO L138 BoogieDeclarations]: Found implementation of procedure _strcmp [2019-10-13 17:47:34,132 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:47:34,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:47:34,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:47:34,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:47:34,133 INFO L130 BoogieDeclarations]: Found specification of procedure _strcmp [2019-10-13 17:47:34,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:47:34,134 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:47:34,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:47:34,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:47:34,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:47:34,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:47:34,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:47:34,441 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:47:34,441 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 17:47:34,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:47:34 BoogieIcfgContainer [2019-10-13 17:47:34,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:47:34,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:47:34,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:47:34,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:47:34,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:47:33" (1/3) ... [2019-10-13 17:47:34,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cf7b636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:47:34, skipping insertion in model container [2019-10-13 17:47:34,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:33" (2/3) ... [2019-10-13 17:47:34,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cf7b636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:47:34, skipping insertion in model container [2019-10-13 17:47:34,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:47:34" (3/3) ... [2019-10-13 17:47:34,449 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_strcmp_ground.i [2019-10-13 17:47:34,456 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:47:34,464 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:47:34,475 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:47:34,499 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:47:34,499 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:47:34,499 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:47:34,499 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:47:34,499 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:47:34,499 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:47:34,500 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:47:34,500 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:47:34,516 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-13 17:47:34,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:47:34,522 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:34,523 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:34,525 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:34,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:34,531 INFO L82 PathProgramCache]: Analyzing trace with hash 893293776, now seen corresponding path program 1 times [2019-10-13 17:47:34,539 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:34,539 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598629861] [2019-10-13 17:47:34,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:34,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:34,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:34,724 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 17:47:34,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598629861] [2019-10-13 17:47:34,726 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:47:34,726 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:47:34,726 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463895128] [2019-10-13 17:47:34,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:47:34,732 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:34,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:47:34,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:47:34,749 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-13 17:47:34,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:34,873 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2019-10-13 17:47:34,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:47:34,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-13 17:47:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:34,885 INFO L225 Difference]: With dead ends: 56 [2019-10-13 17:47:34,885 INFO L226 Difference]: Without dead ends: 27 [2019-10-13 17:47:34,889 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:47:34,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-13 17:47:34,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-13 17:47:34,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 17:47:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-13 17:47:34,933 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 20 [2019-10-13 17:47:34,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:34,934 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-13 17:47:34,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:47:34,934 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-13 17:47:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:47:34,936 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:34,936 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:34,936 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:34,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:34,937 INFO L82 PathProgramCache]: Analyzing trace with hash -368321770, now seen corresponding path program 1 times [2019-10-13 17:47:34,937 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:34,938 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176007056] [2019-10-13 17:47:34,938 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:34,938 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:34,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:35,026 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 17:47:35,027 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176007056] [2019-10-13 17:47:35,027 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:47:35,028 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:47:35,028 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857638089] [2019-10-13 17:47:35,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:47:35,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:35,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:47:35,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:47:35,031 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 4 states. [2019-10-13 17:47:35,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:35,143 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2019-10-13 17:47:35,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:47:35,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-13 17:47:35,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:35,145 INFO L225 Difference]: With dead ends: 48 [2019-10-13 17:47:35,145 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 17:47:35,146 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 17:47:35,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 17:47:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-13 17:47:35,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 17:47:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-10-13 17:47:35,155 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2019-10-13 17:47:35,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:35,156 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-10-13 17:47:35,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:47:35,156 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-10-13 17:47:35,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 17:47:35,157 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:35,157 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:35,158 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:35,159 INFO L82 PathProgramCache]: Analyzing trace with hash -967109544, now seen corresponding path program 1 times [2019-10-13 17:47:35,159 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:35,159 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987553931] [2019-10-13 17:47:35,159 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:35,160 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:35,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:47:35,275 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987553931] [2019-10-13 17:47:35,275 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:47:35,275 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:47:35,275 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803177586] [2019-10-13 17:47:35,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:47:35,276 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:35,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:47:35,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:47:35,277 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 4 states. [2019-10-13 17:47:35,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:35,391 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-10-13 17:47:35,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:47:35,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-10-13 17:47:35,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:35,396 INFO L225 Difference]: With dead ends: 47 [2019-10-13 17:47:35,396 INFO L226 Difference]: Without dead ends: 32 [2019-10-13 17:47:35,397 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:47:35,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-13 17:47:35,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2019-10-13 17:47:35,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 17:47:35,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-10-13 17:47:35,414 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2019-10-13 17:47:35,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:35,414 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-10-13 17:47:35,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:47:35,415 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-10-13 17:47:35,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 17:47:35,416 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:35,416 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:35,417 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:35,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:35,417 INFO L82 PathProgramCache]: Analyzing trace with hash 716522559, now seen corresponding path program 1 times [2019-10-13 17:47:35,417 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:35,418 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228557816] [2019-10-13 17:47:35,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:35,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:35,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:47:35,566 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228557816] [2019-10-13 17:47:35,566 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:47:35,567 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 17:47:35,567 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697122775] [2019-10-13 17:47:35,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:47:35,568 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:35,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:47:35,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:47:35,569 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2019-10-13 17:47:35,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:35,704 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2019-10-13 17:47:35,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:47:35,705 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-10-13 17:47:35,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:35,706 INFO L225 Difference]: With dead ends: 43 [2019-10-13 17:47:35,706 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 17:47:35,706 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:47:35,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 17:47:35,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-13 17:47:35,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 17:47:35,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-13 17:47:35,713 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2019-10-13 17:47:35,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:35,713 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-13 17:47:35,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:47:35,713 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-13 17:47:35,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 17:47:35,714 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:35,714 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:35,715 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:35,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:35,715 INFO L82 PathProgramCache]: Analyzing trace with hash 487231732, now seen corresponding path program 1 times [2019-10-13 17:47:35,715 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:35,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157681590] [2019-10-13 17:47:35,716 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:35,716 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:35,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:47:35,796 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157681590] [2019-10-13 17:47:35,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328831374] [2019-10-13 17:47:35,797 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 17:47:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:35,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:47:35,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:47:35,901 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:35,902 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-13 17:47:35,902 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679149845] [2019-10-13 17:47:35,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:47:35,903 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:35,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:47:35,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:47:35,904 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 6 states. [2019-10-13 17:47:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:35,973 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2019-10-13 17:47:35,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:47:35,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-10-13 17:47:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:35,975 INFO L225 Difference]: With dead ends: 52 [2019-10-13 17:47:35,975 INFO L226 Difference]: Without dead ends: 32 [2019-10-13 17:47:35,975 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:47:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-13 17:47:35,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-10-13 17:47:35,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-13 17:47:35,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-10-13 17:47:35,981 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2019-10-13 17:47:35,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:35,982 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-10-13 17:47:35,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:47:35,982 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-10-13 17:47:35,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 17:47:35,983 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:35,983 INFO L380 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] [2019-10-13 17:47:36,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:36,188 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:36,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:36,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1622628662, now seen corresponding path program 2 times [2019-10-13 17:47:36,189 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:36,189 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215654901] [2019-10-13 17:47:36,189 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:36,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:36,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:47:36,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215654901] [2019-10-13 17:47:36,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239135924] [2019-10-13 17:47:36,266 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 17:47:36,313 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:36,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:36,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:47:36,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:47:36,353 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:36,354 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-10-13 17:47:36,354 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298903297] [2019-10-13 17:47:36,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:47:36,355 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:36,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:47:36,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:47:36,356 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 8 states. [2019-10-13 17:47:36,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:36,512 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2019-10-13 17:47:36,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:47:36,513 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-10-13 17:47:36,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:36,514 INFO L225 Difference]: With dead ends: 57 [2019-10-13 17:47:36,514 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 17:47:36,515 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:47:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 17:47:36,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-10-13 17:47:36,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-13 17:47:36,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-10-13 17:47:36,522 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 26 [2019-10-13 17:47:36,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:36,522 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-10-13 17:47:36,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:47:36,523 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-10-13 17:47:36,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 17:47:36,524 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:36,524 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:36,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:36,728 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:36,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:36,728 INFO L82 PathProgramCache]: Analyzing trace with hash 622062996, now seen corresponding path program 3 times [2019-10-13 17:47:36,729 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:36,729 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716455393] [2019-10-13 17:47:36,729 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:36,730 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:36,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:47:36,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716455393] [2019-10-13 17:47:36,826 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528055242] [2019-10-13 17:47:36,826 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:36,896 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:47:36,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:36,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:47:36,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:47:36,926 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:36,926 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-10-13 17:47:36,927 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961353297] [2019-10-13 17:47:36,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:47:36,928 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:36,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:47:36,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:47:36,929 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 6 states. [2019-10-13 17:47:37,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:37,065 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2019-10-13 17:47:37,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:47:37,066 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-10-13 17:47:37,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:37,067 INFO L225 Difference]: With dead ends: 53 [2019-10-13 17:47:37,067 INFO L226 Difference]: Without dead ends: 38 [2019-10-13 17:47:37,069 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:47:37,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-13 17:47:37,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-10-13 17:47:37,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-13 17:47:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-10-13 17:47:37,083 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2019-10-13 17:47:37,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:37,083 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-10-13 17:47:37,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:47:37,084 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-10-13 17:47:37,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:47:37,085 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:37,085 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:37,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:37,290 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:37,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:37,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1326314704, now seen corresponding path program 4 times [2019-10-13 17:47:37,291 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:37,292 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174148001] [2019-10-13 17:47:37,292 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:37,292 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:37,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:47:37,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174148001] [2019-10-13 17:47:37,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817092832] [2019-10-13 17:47:37,375 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:37,427 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:47:37,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:37,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:47:37,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:47:37,472 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:37,472 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-10-13 17:47:37,472 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189219465] [2019-10-13 17:47:37,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:47:37,473 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:37,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:47:37,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:47:37,474 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 11 states. [2019-10-13 17:47:37,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:37,641 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2019-10-13 17:47:37,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:47:37,646 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2019-10-13 17:47:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:37,647 INFO L225 Difference]: With dead ends: 67 [2019-10-13 17:47:37,648 INFO L226 Difference]: Without dead ends: 43 [2019-10-13 17:47:37,648 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:47:37,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-13 17:47:37,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2019-10-13 17:47:37,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 17:47:37,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-10-13 17:47:37,654 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 32 [2019-10-13 17:47:37,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:37,655 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-10-13 17:47:37,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:47:37,655 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-10-13 17:47:37,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-13 17:47:37,656 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:37,656 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:37,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:37,869 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:37,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:37,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1762135950, now seen corresponding path program 5 times [2019-10-13 17:47:37,871 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:37,871 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797871913] [2019-10-13 17:47:37,872 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:37,872 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:37,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:37,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 17:47:37,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797871913] [2019-10-13 17:47:37,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025096050] [2019-10-13 17:47:37,976 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:38,064 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-13 17:47:38,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:38,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:47:38,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 17:47:38,075 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:38,075 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2019-10-13 17:47:38,075 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462565619] [2019-10-13 17:47:38,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:47:38,076 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:38,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:47:38,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:47:38,077 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 8 states. [2019-10-13 17:47:38,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:38,239 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2019-10-13 17:47:38,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:47:38,239 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2019-10-13 17:47:38,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:38,240 INFO L225 Difference]: With dead ends: 59 [2019-10-13 17:47:38,240 INFO L226 Difference]: Without dead ends: 44 [2019-10-13 17:47:38,241 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:47:38,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-13 17:47:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-10-13 17:47:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-13 17:47:38,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-10-13 17:47:38,251 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 36 [2019-10-13 17:47:38,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:38,251 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-10-13 17:47:38,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:47:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-10-13 17:47:38,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-13 17:47:38,253 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:38,253 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:38,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:38,461 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:38,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:38,462 INFO L82 PathProgramCache]: Analyzing trace with hash -932866390, now seen corresponding path program 6 times [2019-10-13 17:47:38,462 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:38,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582500825] [2019-10-13 17:47:38,463 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:38,463 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:38,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 17:47:38,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582500825] [2019-10-13 17:47:38,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310548374] [2019-10-13 17:47:38,599 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:38,656 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-13 17:47:38,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:38,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-13 17:47:38,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:38,712 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-13 17:47:38,712 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:38,721 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:38,722 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:38,722 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-10-13 17:47:38,753 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2019-10-13 17:47:38,754 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:38,764 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:38,765 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:38,765 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:11 [2019-10-13 17:47:38,857 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 0 case distinctions, treesize of input 26 treesize of output 10 [2019-10-13 17:47:38,858 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:38,861 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:38,862 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:38,862 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2019-10-13 17:47:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 17:47:38,904 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:38,904 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2019-10-13 17:47:38,905 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418348312] [2019-10-13 17:47:38,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:47:38,908 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:38,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:47:38,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:47:38,909 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 18 states. [2019-10-13 17:47:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:39,433 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2019-10-13 17:47:39,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:47:39,434 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2019-10-13 17:47:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:39,435 INFO L225 Difference]: With dead ends: 69 [2019-10-13 17:47:39,435 INFO L226 Difference]: Without dead ends: 54 [2019-10-13 17:47:39,436 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2019-10-13 17:47:39,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-13 17:47:39,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2019-10-13 17:47:39,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-13 17:47:39,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2019-10-13 17:47:39,444 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 38 [2019-10-13 17:47:39,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:39,444 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2019-10-13 17:47:39,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:47:39,444 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2019-10-13 17:47:39,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-13 17:47:39,446 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:39,446 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:39,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:39,650 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:39,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:39,650 INFO L82 PathProgramCache]: Analyzing trace with hash 991549526, now seen corresponding path program 1 times [2019-10-13 17:47:39,651 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:39,651 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508076998] [2019-10-13 17:47:39,651 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:39,652 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:39,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 17:47:39,812 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508076998] [2019-10-13 17:47:39,812 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021061831] [2019-10-13 17:47:39,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:39,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:47:39,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-13 17:47:39,938 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:39,938 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-10-13 17:47:39,938 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624647688] [2019-10-13 17:47:39,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:47:39,939 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:39,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:47:39,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:47:39,940 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 15 states. [2019-10-13 17:47:40,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:40,238 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2019-10-13 17:47:40,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:47:40,239 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2019-10-13 17:47:40,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:40,240 INFO L225 Difference]: With dead ends: 93 [2019-10-13 17:47:40,240 INFO L226 Difference]: Without dead ends: 57 [2019-10-13 17:47:40,242 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:47:40,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-13 17:47:40,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2019-10-13 17:47:40,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-13 17:47:40,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2019-10-13 17:47:40,250 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 48 [2019-10-13 17:47:40,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:40,250 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2019-10-13 17:47:40,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 17:47:40,251 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2019-10-13 17:47:40,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 17:47:40,252 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:40,252 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:40,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:40,460 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:40,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:40,461 INFO L82 PathProgramCache]: Analyzing trace with hash -2040352972, now seen corresponding path program 2 times [2019-10-13 17:47:40,461 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:40,462 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309933409] [2019-10-13 17:47:40,462 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:40,462 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:40,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 17:47:40,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309933409] [2019-10-13 17:47:40,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914692811] [2019-10-13 17:47:40,600 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:40,682 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:40,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:40,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:47:40,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-13 17:47:40,822 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:40,822 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2019-10-13 17:47:40,822 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745949489] [2019-10-13 17:47:40,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:47:40,828 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:40,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:47:40,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:47:40,829 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 17 states. [2019-10-13 17:47:41,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:41,097 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2019-10-13 17:47:41,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:47:41,098 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2019-10-13 17:47:41,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:41,099 INFO L225 Difference]: With dead ends: 99 [2019-10-13 17:47:41,099 INFO L226 Difference]: Without dead ends: 61 [2019-10-13 17:47:41,100 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:47:41,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-13 17:47:41,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2019-10-13 17:47:41,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-13 17:47:41,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2019-10-13 17:47:41,113 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2019-10-13 17:47:41,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:41,113 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2019-10-13 17:47:41,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:47:41,113 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2019-10-13 17:47:41,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 17:47:41,114 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:41,115 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:41,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:41,318 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:41,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:41,319 INFO L82 PathProgramCache]: Analyzing trace with hash 290100626, now seen corresponding path program 3 times [2019-10-13 17:47:41,319 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:41,320 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909364627] [2019-10-13 17:47:41,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:41,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:41,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 17:47:41,479 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909364627] [2019-10-13 17:47:41,479 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565601602] [2019-10-13 17:47:41,479 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:41,556 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-13 17:47:41,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:41,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 52 conjunts are in the unsatisfiable core [2019-10-13 17:47:41,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:41,567 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-13 17:47:41,568 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:41,573 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:41,574 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:41,574 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-10-13 17:47:41,599 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2019-10-13 17:47:41,600 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:41,609 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:41,610 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:41,610 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:11 [2019-10-13 17:47:43,726 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int) (|v_main_~#b~0.base_BEFORE_CALL_3| Int)) (and (not (= |v_main_~#b~0.base_BEFORE_CALL_3| |v_main_~#a~0.base_BEFORE_CALL_3|)) (= (select (select |c_#memory_int| |v_main_~#b~0.base_BEFORE_CALL_3|) 4) (select (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) 4)))) is different from true [2019-10-13 17:47:45,767 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 17 [2019-10-13 17:47:47,818 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 18 [2019-10-13 17:47:47,938 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 0 case distinctions, treesize of input 26 treesize of output 10 [2019-10-13 17:47:47,939 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:47,943 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:47,943 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:47,943 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2019-10-13 17:47:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 72 trivial. 1 not checked. [2019-10-13 17:47:50,020 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:50,020 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2019-10-13 17:47:50,020 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446605856] [2019-10-13 17:47:50,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-13 17:47:50,021 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:50,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-13 17:47:50,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=495, Unknown=2, NotChecked=46, Total=650 [2019-10-13 17:47:50,022 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 26 states. [2019-10-13 17:48:16,661 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2019-10-13 17:48:18,703 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 26 [2019-10-13 17:48:20,749 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 29