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 0.1.24-13a467a-m [2019-10-14 21:46:38,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:46:38,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:46:38,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:46:38,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:46:38,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:46:38,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:46:38,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:46:38,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:46:38,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:46:38,374 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:46:38,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:46:38,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:46:38,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:46:38,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:46:38,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:46:38,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:46:38,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:46:38,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:46:38,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:46:38,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:46:38,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:46:38,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:46:38,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:46:38,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:46:38,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:46:38,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:46:38,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:46:38,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:46:38,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:46:38,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:46:38,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:46:38,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:46:38,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:46:38,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:46:38,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:46:38,426 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 [2019-10-14 21:46:38,445 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:46:38,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:46:38,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:46:38,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:46:38,448 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:46:38,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:46:38,449 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:46:38,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:46:38,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:46:38,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:46:38,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:46:38,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:46:38,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:46:38,451 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:46:38,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:46:38,452 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:46:38,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:46:38,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:46:38,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:46:38,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:46:38,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:46:38,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:46:38,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:46:38,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:46:38,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:46:38,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:46:38,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:46:38,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:46:38,454 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:46:38,715 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:46:38,731 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:46:38,736 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:46:38,737 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:46:38,738 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:46:38,738 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcmp_ground.i [2019-10-14 21:46:38,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9345e490/3d13064c340044fcbd6e7d0afbfce3a2/FLAG52fe8dffb [2019-10-14 21:46:39,277 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:46:39,277 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_strcmp_ground.i [2019-10-14 21:46:39,284 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9345e490/3d13064c340044fcbd6e7d0afbfce3a2/FLAG52fe8dffb [2019-10-14 21:46:39,702 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9345e490/3d13064c340044fcbd6e7d0afbfce3a2 [2019-10-14 21:46:39,715 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:46:39,717 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:46:39,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:39,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:46:39,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:46:39,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:39" (1/1) ... [2019-10-14 21:46:39,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510c1389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:39, skipping insertion in model container [2019-10-14 21:46:39,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:39" (1/1) ... [2019-10-14 21:46:39,734 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:46:39,749 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:46:39,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:39,926 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:46:39,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:39,958 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:46:39,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:39 WrapperNode [2019-10-14 21:46:39,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:39,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:46:39,960 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:46:39,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:46:40,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:39" (1/1) ... [2019-10-14 21:46:40,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:39" (1/1) ... [2019-10-14 21:46:40,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:39" (1/1) ... [2019-10-14 21:46:40,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:39" (1/1) ... [2019-10-14 21:46:40,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:39" (1/1) ... [2019-10-14 21:46:40,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:39" (1/1) ... [2019-10-14 21:46:40,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:39" (1/1) ... [2019-10-14 21:46:40,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:46:40,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:46:40,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:46:40,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:46:40,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:39" (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 [2019-10-14 21:46:40,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:46:40,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:46:40,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:46:40,135 INFO L138 BoogieDeclarations]: Found implementation of procedure _strcmp [2019-10-14 21:46:40,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:46:40,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:46:40,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:46:40,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:46:40,136 INFO L130 BoogieDeclarations]: Found specification of procedure _strcmp [2019-10-14 21:46:40,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:46:40,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:46:40,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:46:40,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:46:40,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:46:40,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:46:40,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:46:40,397 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:46:40,397 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:46:40,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:40 BoogieIcfgContainer [2019-10-14 21:46:40,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:46:40,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:46:40,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:46:40,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:46:40,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:46:39" (1/3) ... [2019-10-14 21:46:40,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41cc578d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:40, skipping insertion in model container [2019-10-14 21:46:40,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:39" (2/3) ... [2019-10-14 21:46:40,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41cc578d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:40, skipping insertion in model container [2019-10-14 21:46:40,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:40" (3/3) ... [2019-10-14 21:46:40,407 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_strcmp_ground.i [2019-10-14 21:46:40,418 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:46:40,426 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:46:40,450 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:46:40,479 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:46:40,479 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:46:40,479 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:46:40,479 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:46:40,479 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:46:40,479 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:46:40,480 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:46:40,480 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:46:40,499 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-14 21:46:40,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:46:40,505 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:40,506 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] [2019-10-14 21:46:40,508 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:40,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:40,513 INFO L82 PathProgramCache]: Analyzing trace with hash 893293776, now seen corresponding path program 1 times [2019-10-14 21:46:40,519 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:40,519 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158657525] [2019-10-14 21:46:40,520 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:40,520 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:40,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:46:40,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158657525] [2019-10-14 21:46:40,709 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:40,710 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:46:40,710 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208402911] [2019-10-14 21:46:40,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:46:40,719 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:40,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:46:40,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:46:40,741 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-14 21:46:40,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:40,839 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2019-10-14 21:46:40,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:46:40,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-14 21:46:40,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:40,850 INFO L225 Difference]: With dead ends: 56 [2019-10-14 21:46:40,850 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:46:40,854 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 [2019-10-14 21:46:40,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:46:40,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 21:46:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:46:40,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-14 21:46:40,897 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 20 [2019-10-14 21:46:40,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:40,898 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-14 21:46:40,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:46:40,898 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-14 21:46:40,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:46:40,900 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:40,900 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] [2019-10-14 21:46:40,900 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:40,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:40,901 INFO L82 PathProgramCache]: Analyzing trace with hash -368321770, now seen corresponding path program 1 times [2019-10-14 21:46:40,901 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:40,902 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649432498] [2019-10-14 21:46:40,902 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:40,902 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:40,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:40,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:46:41,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649432498] [2019-10-14 21:46:41,008 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:41,008 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:41,008 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602647202] [2019-10-14 21:46:41,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:41,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:41,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:41,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:41,012 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 4 states. [2019-10-14 21:46:41,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:41,094 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2019-10-14 21:46:41,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:41,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-14 21:46:41,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:41,096 INFO L225 Difference]: With dead ends: 48 [2019-10-14 21:46:41,096 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 21:46:41,097 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 [2019-10-14 21:46:41,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 21:46:41,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-14 21:46:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:46:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-10-14 21:46:41,106 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2019-10-14 21:46:41,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:41,106 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-10-14 21:46:41,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:41,106 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-10-14 21:46:41,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:46:41,107 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:41,108 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] [2019-10-14 21:46:41,108 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:41,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:41,109 INFO L82 PathProgramCache]: Analyzing trace with hash -967109544, now seen corresponding path program 1 times [2019-10-14 21:46:41,109 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:41,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524955912] [2019-10-14 21:46:41,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:41,110 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:41,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:41,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524955912] [2019-10-14 21:46:41,206 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:41,206 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:41,206 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419536724] [2019-10-14 21:46:41,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:41,207 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:41,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:41,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:41,212 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 4 states. [2019-10-14 21:46:41,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:41,303 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-10-14 21:46:41,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:41,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-10-14 21:46:41,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:41,307 INFO L225 Difference]: With dead ends: 47 [2019-10-14 21:46:41,307 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 21:46:41,308 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 [2019-10-14 21:46:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 21:46:41,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2019-10-14 21:46:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:46:41,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-10-14 21:46:41,316 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2019-10-14 21:46:41,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:41,317 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-10-14 21:46:41,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:41,317 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-10-14 21:46:41,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:46:41,318 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:41,318 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] [2019-10-14 21:46:41,319 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:41,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:41,319 INFO L82 PathProgramCache]: Analyzing trace with hash 716522559, now seen corresponding path program 1 times [2019-10-14 21:46:41,320 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:41,320 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685946800] [2019-10-14 21:46:41,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:41,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:41,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:41,469 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685946800] [2019-10-14 21:46:41,469 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:41,470 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:46:41,470 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974764941] [2019-10-14 21:46:41,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:46:41,471 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:41,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:46:41,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:46:41,471 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2019-10-14 21:46:41,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:41,593 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2019-10-14 21:46:41,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:46:41,593 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-10-14 21:46:41,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:41,594 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:46:41,594 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 21:46:41,595 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 [2019-10-14 21:46:41,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 21:46:41,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-14 21:46:41,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:46:41,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-14 21:46:41,601 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2019-10-14 21:46:41,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:41,601 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-14 21:46:41,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:46:41,601 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-14 21:46:41,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:46:41,602 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:41,602 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] [2019-10-14 21:46:41,603 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:41,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:41,603 INFO L82 PathProgramCache]: Analyzing trace with hash 487231732, now seen corresponding path program 1 times [2019-10-14 21:46:41,603 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:41,604 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239706148] [2019-10-14 21:46:41,604 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:41,604 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:41,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:41,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239706148] [2019-10-14 21:46:41,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167928421] [2019-10-14 21:46:41,701 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 [2019-10-14 21:46:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:46:41,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:41,813 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:41,813 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:46:41,813 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623061520] [2019-10-14 21:46:41,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:46:41,814 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:41,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:46:41,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:46:41,815 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 6 states. [2019-10-14 21:46:41,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:41,904 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2019-10-14 21:46:41,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:46:41,905 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-10-14 21:46:41,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:41,906 INFO L225 Difference]: With dead ends: 52 [2019-10-14 21:46:41,906 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 21:46:41,907 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 [2019-10-14 21:46:41,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 21:46:41,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-10-14 21:46:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 21:46:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-10-14 21:46:41,913 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2019-10-14 21:46:41,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:41,913 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-10-14 21:46:41,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:46:41,913 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-10-14 21:46:41,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 21:46:41,914 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:41,914 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] [2019-10-14 21:46:42,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:42,123 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:42,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:42,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1622628662, now seen corresponding path program 2 times [2019-10-14 21:46:42,123 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:42,124 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952335567] [2019-10-14 21:46:42,124 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:42,124 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:42,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:46:42,200 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952335567] [2019-10-14 21:46:42,200 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805041724] [2019-10-14 21:46:42,202 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 [2019-10-14 21:46:42,271 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:42,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:42,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:46:42,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:42,306 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:42,306 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-10-14 21:46:42,306 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857214496] [2019-10-14 21:46:42,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:46:42,307 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:42,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:46:42,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:46:42,308 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 8 states. [2019-10-14 21:46:42,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:42,456 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2019-10-14 21:46:42,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:46:42,456 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-10-14 21:46:42,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:42,457 INFO L225 Difference]: With dead ends: 57 [2019-10-14 21:46:42,458 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:46:42,459 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 [2019-10-14 21:46:42,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:46:42,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-10-14 21:46:42,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:46:42,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-10-14 21:46:42,469 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 26 [2019-10-14 21:46:42,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:42,469 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-10-14 21:46:42,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:46:42,469 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-10-14 21:46:42,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:46:42,470 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:42,470 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] [2019-10-14 21:46:42,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:42,671 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:42,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:42,672 INFO L82 PathProgramCache]: Analyzing trace with hash 622062996, now seen corresponding path program 3 times [2019-10-14 21:46:42,672 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:42,672 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673027141] [2019-10-14 21:46:42,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:42,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:42,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:46:42,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673027141] [2019-10-14 21:46:42,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409147793] [2019-10-14 21:46:42,745 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 [2019-10-14 21:46:42,806 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:46:42,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:42,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:46:42,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:46:42,817 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:42,817 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-10-14 21:46:42,818 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960475781] [2019-10-14 21:46:42,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:46:42,818 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:42,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:46:42,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:46:42,819 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 6 states. [2019-10-14 21:46:42,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:42,959 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2019-10-14 21:46:42,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:46:42,960 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-10-14 21:46:42,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:42,961 INFO L225 Difference]: With dead ends: 53 [2019-10-14 21:46:42,961 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 21:46:42,961 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 [2019-10-14 21:46:42,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 21:46:42,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-10-14 21:46:42,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 21:46:42,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-10-14 21:46:42,967 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2019-10-14 21:46:42,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:42,968 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-10-14 21:46:42,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:46:42,968 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-10-14 21:46:42,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:46:42,969 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:42,969 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] [2019-10-14 21:46:43,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:43,173 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:43,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:43,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1326314704, now seen corresponding path program 4 times [2019-10-14 21:46:43,174 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:43,174 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383411460] [2019-10-14 21:46:43,174 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:43,175 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:43,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:46:43,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383411460] [2019-10-14 21:46:43,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244639642] [2019-10-14 21:46:43,310 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 [2019-10-14 21:46:43,356 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:43,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:43,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:46:43,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:46:43,401 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:43,403 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-10-14 21:46:43,403 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530203839] [2019-10-14 21:46:43,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:46:43,404 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:43,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:46:43,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:46:43,406 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 11 states. [2019-10-14 21:46:43,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:43,575 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2019-10-14 21:46:43,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:46:43,575 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2019-10-14 21:46:43,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:43,576 INFO L225 Difference]: With dead ends: 67 [2019-10-14 21:46:43,577 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 21:46:43,577 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 [2019-10-14 21:46:43,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 21:46:43,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2019-10-14 21:46:43,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:46:43,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-10-14 21:46:43,583 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 32 [2019-10-14 21:46:43,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:43,583 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-10-14 21:46:43,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:46:43,584 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-10-14 21:46:43,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:46:43,586 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:43,586 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] [2019-10-14 21:46:43,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:43,797 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:43,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:43,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1762135950, now seen corresponding path program 5 times [2019-10-14 21:46:43,798 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:43,799 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780857255] [2019-10-14 21:46:43,799 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:43,799 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:43,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:46:43,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780857255] [2019-10-14 21:46:43,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017970613] [2019-10-14 21:46:43,964 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 [2019-10-14 21:46:44,055 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-14 21:46:44,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:44,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:46:44,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:46:44,078 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:44,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2019-10-14 21:46:44,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269354229] [2019-10-14 21:46:44,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:46:44,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:44,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:46:44,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:46:44,081 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 8 states. [2019-10-14 21:46:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:44,223 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2019-10-14 21:46:44,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:46:44,223 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2019-10-14 21:46:44,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:44,224 INFO L225 Difference]: With dead ends: 59 [2019-10-14 21:46:44,224 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 21:46:44,225 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 [2019-10-14 21:46:44,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 21:46:44,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-10-14 21:46:44,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 21:46:44,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-10-14 21:46:44,236 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 36 [2019-10-14 21:46:44,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:44,236 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-10-14 21:46:44,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:46:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-10-14 21:46:44,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:46:44,240 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:44,240 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] [2019-10-14 21:46:44,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:44,453 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:44,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:44,453 INFO L82 PathProgramCache]: Analyzing trace with hash -932866390, now seen corresponding path program 6 times [2019-10-14 21:46:44,453 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:44,454 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576795368] [2019-10-14 21:46:44,454 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:44,454 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:44,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:46:44,563 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576795368] [2019-10-14 21:46:44,563 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306091980] [2019-10-14 21:46:44,563 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 [2019-10-14 21:46:44,616 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 21:46:44,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:44,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-14 21:46:44,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:44,666 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 [2019-10-14 21:46:44,667 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:44,677 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:44,677 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:44,677 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-10-14 21:46:44,700 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 [2019-10-14 21:46:44,700 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:44,710 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:44,711 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:44,711 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:11 [2019-10-14 21:46:44,801 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 [2019-10-14 21:46:44,802 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:44,805 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:44,806 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:44,806 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2019-10-14 21:46:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-14 21:46:44,857 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:44,857 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2019-10-14 21:46:44,857 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125146143] [2019-10-14 21:46:44,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:46:44,861 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:44,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:46:44,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:46:44,862 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 18 states. [2019-10-14 21:46:45,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:45,314 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2019-10-14 21:46:45,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:46:45,314 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2019-10-14 21:46:45,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:45,315 INFO L225 Difference]: With dead ends: 69 [2019-10-14 21:46:45,315 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:46:45,316 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:46:45,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:46:45,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2019-10-14 21:46:45,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:46:45,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2019-10-14 21:46:45,323 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 38 [2019-10-14 21:46:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:45,324 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2019-10-14 21:46:45,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:46:45,324 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2019-10-14 21:46:45,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 21:46:45,325 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:45,325 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] [2019-10-14 21:46:45,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:45,529 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:45,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:45,530 INFO L82 PathProgramCache]: Analyzing trace with hash 991549526, now seen corresponding path program 1 times [2019-10-14 21:46:45,530 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:45,531 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746207811] [2019-10-14 21:46:45,531 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:45,531 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:45,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 21:46:45,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746207811] [2019-10-14 21:46:45,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696030029] [2019-10-14 21:46:45,659 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 [2019-10-14 21:46:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:45,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:46:45,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 21:46:45,798 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:45,798 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-10-14 21:46:45,799 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768860665] [2019-10-14 21:46:45,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:46:45,800 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:45,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:46:45,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:46:45,801 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 15 states. [2019-10-14 21:46:46,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:46,060 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2019-10-14 21:46:46,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:46:46,060 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2019-10-14 21:46:46,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:46,062 INFO L225 Difference]: With dead ends: 93 [2019-10-14 21:46:46,062 INFO L226 Difference]: Without dead ends: 57 [2019-10-14 21:46:46,063 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:46:46,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-14 21:46:46,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2019-10-14 21:46:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 21:46:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2019-10-14 21:46:46,070 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 48 [2019-10-14 21:46:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:46,070 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2019-10-14 21:46:46,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:46:46,070 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2019-10-14 21:46:46,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:46:46,071 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:46,071 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] [2019-10-14 21:46:46,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:46,283 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:46,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:46,283 INFO L82 PathProgramCache]: Analyzing trace with hash -2040352972, now seen corresponding path program 2 times [2019-10-14 21:46:46,284 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:46,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247181403] [2019-10-14 21:46:46,284 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:46,284 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:46,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-14 21:46:46,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247181403] [2019-10-14 21:46:46,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205541937] [2019-10-14 21:46:46,391 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 [2019-10-14 21:46:46,455 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:46,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:46,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:46:46,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-14 21:46:46,568 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:46,568 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2019-10-14 21:46:46,568 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813618124] [2019-10-14 21:46:46,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:46:46,569 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:46,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:46:46,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:46:46,570 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 17 states. [2019-10-14 21:46:46,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:46,807 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2019-10-14 21:46:46,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:46:46,807 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2019-10-14 21:46:46,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:46,808 INFO L225 Difference]: With dead ends: 99 [2019-10-14 21:46:46,808 INFO L226 Difference]: Without dead ends: 61 [2019-10-14 21:46:46,809 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:46:46,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-14 21:46:46,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2019-10-14 21:46:46,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-14 21:46:46,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2019-10-14 21:46:46,816 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2019-10-14 21:46:46,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:46,816 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2019-10-14 21:46:46,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:46:46,817 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2019-10-14 21:46:46,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:46:46,818 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:46,818 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] [2019-10-14 21:46:47,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:47,024 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:47,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:47,024 INFO L82 PathProgramCache]: Analyzing trace with hash 290100626, now seen corresponding path program 3 times [2019-10-14 21:46:47,025 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:47,025 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211217467] [2019-10-14 21:46:47,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:47,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:47,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-14 21:46:47,159 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211217467] [2019-10-14 21:46:47,159 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358340334] [2019-10-14 21:46:47,159 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 [2019-10-14 21:46:47,226 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-14 21:46:47,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:47,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 52 conjunts are in the unsatisfiable core [2019-10-14 21:46:47,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:47,238 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 [2019-10-14 21:46:47,239 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:47,255 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:47,255 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:47,255 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-10-14 21:46:47,287 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 [2019-10-14 21:46:47,288 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:47,297 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:47,298 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:47,298 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:11 [2019-10-14 21:46:49,416 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 [2019-10-14 21:46:51,449 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 17 [2019-10-14 21:46:53,498 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 18 [2019-10-14 21:46:53,601 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 [2019-10-14 21:46:53,602 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:53,606 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:53,606 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:53,606 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2019-10-14 21:46:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 72 trivial. 1 not checked. [2019-10-14 21:46:55,692 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:55,692 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2019-10-14 21:46:55,692 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782133935] [2019-10-14 21:46:55,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 21:46:55,693 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:55,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 21:46:55,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=495, Unknown=2, NotChecked=46, Total=650 [2019-10-14 21:46:55,694 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 26 states. [2019-10-14 21:47:22,300 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2019-10-14 21:47:24,341 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 26 [2019-10-14 21:47:26,386 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 29 [2019-10-14 21:47:30,546 WARN L191 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 29 DAG size of output: 26